configure.ac

   1 dnl   configuration script for Guile
   2 dnl   Process this file with autoconf to produce configure.
   3 dnl
   4
   5 define(GUILE_CONFIGURE_COPYRIGHT,[[
   6
   7 Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
   8   2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
   9
  10 This file is part of GUILE
  11
  12 GUILE is free software; you can redistribute it and/or modify it under
  13 the terms of the GNU Lesser General Public License as published by the
  14 Free Software Foundation; either version 3, or (at your option) any
  15 later version.
  16
  17 GUILE is distributed in the hope that it will be useful, but WITHOUT
  18 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  19 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  20 License for more details.
  21
  22 You should have received a copy of the GNU Lesser General Public
  23 License along with GUILE; see the file COPYING.LESSER.  If not, write
  24 to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
  25 Floor, Boston, MA 02110-1301, USA.
  26
  27 ]])
  28
  29 AC_PREREQ(2.61)
  30
  31 AC_INIT([GNU Guile],
  32         m4_esyscmd([build-aux/git-version-gen .tarball-version]),
  33         [bug-guile@gnu.org])
  34 AC_CONFIG_AUX_DIR([build-aux])
  35 AC_CONFIG_MACRO_DIR([m4])
  36 AC_CONFIG_SRCDIR(GUILE-VERSION)
  37
  38 AM_INIT_AUTOMAKE([gnu no-define -Wall -Wno-override])
  39 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])], [AC_SUBST([AM_DEFAULT_VERBOSITY],1)])
  40
  41 AC_COPYRIGHT(GUILE_CONFIGURE_COPYRIGHT)
  42 AC_CONFIG_SRCDIR([GUILE-VERSION])
  43
  44 . $srcdir/GUILE-VERSION
  45 GUILE_VERSION="$PACKAGE_VERSION"
  46
  47 AC_CONFIG_HEADERS([config.h])
  48 AH_TOP(/*GUILE_CONFIGURE_COPYRIGHT*/)
  49
  50 #--------------------------------------------------------------------
  51
  52 AC_LANG([C])
  53
  54 dnl Some more checks for Win32
  55 AC_CANONICAL_HOST
  56
  57 AC_LIBTOOL_WIN32_DLL
  58
  59 AC_PROG_INSTALL
  60 AC_PROG_CC
  61 gl_EARLY
  62 AC_PROG_CPP
  63 AC_PROG_SED
  64 AC_PROG_AWK
  65
  66 dnl Gnulib.
  67 gl_INIT
  68
  69 AC_PROG_CC_C89
  70
  71 # for per-target cflags in the libguile subdir
  72 AM_PROG_CC_C_O
  73
  74 AC_LIBTOOL_DLOPEN
  75 AC_PROG_LIBTOOL
  76
  77 AM_CONDITIONAL([HAVE_SHARED_LIBRARIES], [test "x$enable_shared" = "xyes"])
  78
  79 AC_DEFINE_UNQUOTED([SHARED_LIBRARY_PATH_VARIABLE], ["$shlibpath_var"],
  80   [Name of the environment variable that tells the dynamic linker where
  81 to find shared libraries.])
  82
  83 dnl Check for libltdl.
  84 AC_LIB_HAVE_LINKFLAGS([ltdl], [], [#include <ltdl.h>],
  85   [lt_dlopenext ("foo");])
  86 if test "x$HAVE_LIBLTDL" != "xyes"; then
  87   AC_MSG_ERROR([GNU libltdl (Libtool) not found, see README.])
  88 fi
  89
  90 AC_CHECK_PROG(have_makeinfo, makeinfo, yes, no)
  91 AM_CONDITIONAL(HAVE_MAKEINFO, test "$have_makeinfo" = yes)
  92
  93 AM_PATH_LISPDIR
  94
  95 AC_DEFINE_UNQUOTED([HOST_TYPE], ["$host"],
  96   [Define to the host's GNU triplet.])
  97
  98 #--------------------------------------------------------------------
  99 #
 100 # User options (after above tests that may set default CFLAGS etc.)
 101 #
 102 #--------------------------------------------------------------------
 103
 104 GUILE_ERROR_ON_WARNING="no"
 105
 106 AC_ARG_ENABLE(error-on-warning,
 107   [  --enable-error-on-warning    treat compile warnings as errors],
 108   [case "${enableval}" in
 109      yes | y) GUILE_ERROR_ON_WARNING="yes" ;;
 110      no | n)  GUILE_ERROR_ON_WARNING="no" ;;
 111      *) AC_MSG_ERROR(bad value ${enableval} for --enable-error-on-warning) ;;
 112    esac])
 113
 114 AC_ARG_ENABLE(debug-malloc,
 115   [  --enable-debug-malloc   include malloc debugging code],
 116   if test "$enable_debug_malloc" = y || test "$enable_debug_malloc" = yes; then
 117     AC_DEFINE([GUILE_DEBUG_MALLOC], 1,
 118       [Define this if you want to debug scm_must_malloc/realloc/free calls.])
 119   fi)
 120
 121 SCM_I_GSC_GUILE_DEBUG=0
 122 AC_ARG_ENABLE(guile-debug,
 123   [AS_HELP_STRING([--enable-guile-debug],
 124                   [include internal debugging functions])],
 125   if test "$enable_guile_debug" = y || test "$enable_guile_debug" = yes; then
 126     SCM_I_GSC_GUILE_DEBUG=1
 127   fi)
 128
 129 AC_ARG_ENABLE(posix,
 130   [  --disable-posix         omit posix interfaces],,
 131   enable_posix=yes)
 132
 133 AC_ARG_ENABLE(networking,
 134   [  --disable-networking    omit networking interfaces],,
 135   enable_networking=yes)
 136
 137 AC_ARG_ENABLE(regex,
 138   [  --disable-regex         omit regular expression interfaces],,
 139   enable_regex=yes)
 140
 141 AC_ARG_ENABLE([deprecated],
 142   AS_HELP_STRING([--disable-deprecated],[omit deprecated features]))
 143
 144 if test "$enable_deprecated" = no; then
 145   SCM_I_GSC_ENABLE_DEPRECATED=0
 146   warn_default=no
 147 else
 148   if test "$enable_deprecated" = yes || test "$enable_deprecated" = ""; then
 149     warn_default=summary
 150   elif test "$enable_deprecated" = shutup; then
 151     warn_default=no
 152   else
 153     warn_default=$enable_deprecated
 154   fi
 155   SCM_I_GSC_ENABLE_DEPRECATED=1
 156 fi
 157 AC_DEFINE_UNQUOTED([SCM_WARN_DEPRECATED_DEFAULT], "$warn_default",
 158 [Define this to control the default warning level for deprecated features.])
 159
 160 dnl  Added the following configure option in January 2008 following
 161 dnl  investigation of problems with "64" system and library calls on
 162 dnl  Darwin (MacOS X).  The libguile code (_scm.h) assumes that if a
 163 dnl  system has stat64, it will have all the other 64 APIs too; but on
 164 dnl  Darwin, stat64 is there but other APIs are missing.
 165 dnl
 166 dnl  It also appears, from the Darwin docs, that most system call APIs
 167 dnl  there (i.e. the traditional ones _without_ "64" in their names) have
 168 dnl  been 64-bit-capable for a long time now, so it isn't necessary to
 169 dnl  use "64" versions anyway.  For example, Darwin's off_t is 64-bit.
 170 dnl
 171 dnl  A similar problem has been reported for HP-UX:
 172 dnl  http://www.nabble.com/Building-guile-1.8.2-on-hpux-td13106681.html
 173 dnl
 174 dnl  Therefore, and also because a Guile without LARGEFILE64 support is
 175 dnl  better than no Guile at all, we provide this option to suppress
 176 dnl  trying to use "64" calls.
 177 dnl
 178 dnl  It may be that for some 64-bit function on Darwin/HP-UX we do need
 179 dnl  to use a "64" call, and hence that by using --without-64-calls we're
 180 dnl  missing out on that.  If so, someone can work on that in the future.
 181 dnl  For now, --without-64-calls allows Guile to build on OSs where it
 182 dnl  wasn't building before.
 183 AC_MSG_CHECKING([whether to use system and library "64" calls])
 184 AC_ARG_WITH([64-calls],
 185   AS_HELP_STRING([--without-64-calls],
 186                  [don't attempt to use system and library calls with "64" in their names]),
 187   [use_64_calls=$withval],
 188   [use_64_calls=yes
 189    case $host in
 190      *-apple-darwin* )
 191        use_64_calls=no
 192        ;;
 193      powerpc-ibm-aix* )
 194        use_64_calls=no
 195        ;;
 196    esac])
 197 AC_MSG_RESULT($use_64_calls)
 198 case "$use_64_calls" in
 199   y* )
 200     AC_DEFINE([GUILE_USE_64_CALLS], 1,
 201       [Define to 1 in order to try to use "64" versions of system and library calls.])
 202     ;;
 203 esac
 204
 205 #--------------------------------------------------------------------
 206
 207 dnl Check for dynamic linking
 208
 209 use_modules=yes
 210 AC_ARG_WITH(modules,
 211 [  --with-modules[=FILES]  Add support for dynamic modules],
 212 use_modules="$withval")
 213 test -z "$use_modules" && use_modules=yes
 214 DLPREOPEN=
 215 if test "$use_modules" != no; then
 216   if test "$use_modules" = yes; then
 217     DLPREOPEN="-dlpreopen force"
 218   else
 219     DLPREOPEN="-export-dynamic"
 220     for module in $use_modules; do
 221       DLPREOPEN="$DLPREOPEN -dlopen $module"
 222     done
 223   fi
 224 fi
 225
 226 dnl files which are destined for separate modules.
 227
 228 if test "$use_modules" != no; then
 229    AC_LIBOBJ([dynl])
 230 fi
 231
 232 if test "$enable_posix" = yes; then
 233    AC_LIBOBJ([filesys])
 234    AC_LIBOBJ([posix])
 235    AC_DEFINE([HAVE_POSIX], 1,
 236      [Define this if you want support for POSIX system calls in Guile.])
 237 fi
 238
 239 if test "$enable_networking" = yes; then
 240    AC_LIBOBJ([net_db])
 241    AC_LIBOBJ([socket])
 242    AC_DEFINE([HAVE_NETWORKING], 1,
 243      [Define this if you want support for networking in Guile.])
 244 fi
 245
 246 if test "$enable_debug_malloc" = yes; then
 247    AC_LIBOBJ([debug-malloc])
 248 fi
 249
 250 AC_CHECK_LIB(uca, __uc_get_ar_bsp)
 251
 252 AC_C_CONST
 253
 254 # "volatile" is used in a couple of tests below.
 255 AC_C_VOLATILE
 256
 257 AC_C_INLINE
 258 if test "$ac_cv_c_inline" != no; then
 259   SCM_I_GSC_C_INLINE="\"${ac_cv_c_inline}\""
 260 else
 261   SCM_I_GSC_C_INLINE=NULL
 262 fi
 263 AC_CHECK_LIB(uca, __uc_get_ar_bsp)
 264
 265 AC_C_BIGENDIAN
 266
 267 AC_C_LABELS_AS_VALUES
 268
 269 AC_CHECK_SIZEOF(char)
 270 AC_CHECK_SIZEOF(unsigned char)
 271 AC_CHECK_SIZEOF(short)
 272 AC_CHECK_SIZEOF(unsigned short)
 273 AC_CHECK_SIZEOF(int)
 274 AC_CHECK_SIZEOF(unsigned int)
 275 AC_CHECK_SIZEOF(long)
 276 AC_CHECK_SIZEOF(unsigned long)
 277 AC_CHECK_SIZEOF(size_t)
 278 AC_CHECK_SIZEOF(long long)
 279 AC_CHECK_SIZEOF(unsigned long long)
 280 AC_CHECK_SIZEOF(__int64)
 281 AC_CHECK_SIZEOF(unsigned __int64)
 282 AC_CHECK_SIZEOF(void *)
 283 AC_CHECK_SIZEOF(intptr_t)
 284 AC_CHECK_SIZEOF(uintptr_t)
 285 AC_CHECK_SIZEOF(ptrdiff_t)
 286 AC_CHECK_SIZEOF(size_t)
 287 AC_CHECK_SIZEOF(off_t)
 288
 289 if test "$ac_cv_sizeof_long" -gt "$ac_cv_sizeof_void_p"; then
 290   AC_MSG_ERROR(long does not fit into a void*)
 291 fi
 292
 293 if test "$ac_cv_sizeof_ptrdiff_t" -ne 0; then
 294   SCM_I_GSC_T_PTRDIFF='"ptrdiff_t"'
 295 else
 296   SCM_I_GSC_T_PTRDIFF='"long"'
 297 fi
 298 AC_SUBST([SCM_I_GSC_T_PTRDIFF])
 299
 300 AC_CHECK_HEADERS([stdint.h])
 301 AC_CHECK_HEADERS([inttypes.h])
 302
 303 AC_CHECK_SIZEOF(intmax_t)
 304
 305 SCM_I_GSC_NEEDS_STDINT_H=0
 306 SCM_I_GSC_NEEDS_INTTYPES_H=0
 307
 308 ### intptr and uintptr (try not to use inttypes if we don't have to)
 309 if test "$ac_cv_header_inttypes_h" = yes; then
 310   if test "$ac_cv_sizeof_intptr_t" -eq 0; then
 311     AC_CHECK_SIZEOF([intptr_t],,[#include <inttypes.h>
 312 #include <stdio.h>])
 313     if test "$ac_cv_sizeof_intptr_t" -ne 0; then
 314       SCM_I_GSC_NEEDS_INTTYPES_H=1
 315     fi
 316   fi
 317   if test "$ac_cv_sizeof_uintptr_t" -eq 0; then
 318     AC_CHECK_SIZEOF([uintptr_t],,[#include <inttypes.h>
 319 #include <stdio.h>])
 320     if test "$ac_cv_sizeof_uintptr_t" -ne 0; then
 321       SCM_I_GSC_NEEDS_INTTYPES_H=1
 322     fi
 323   fi
 324 fi
 325
 326 ### See what's provided by stdint.h
 327 if test "$ac_cv_header_stdint_h" = yes; then
 328    AC_CHECK_TYPE([int8_t],[scm_stdint_has_int8=1],,[#include <stdint.h>])
 329    AC_CHECK_TYPE([uint8_t],[scm_stdint_has_uint8=1],,[#include <stdint.h>])
 330    AC_CHECK_TYPE([int16_t],[scm_stdint_has_int16=1],,[#include <stdint.h>])
 331    AC_CHECK_TYPE([uint16_t],[scm_stdint_has_uint16=1],,[#include <stdint.h>])
 332    AC_CHECK_TYPE([int32_t],[scm_stdint_has_int32=1],,[#include <stdint.h>])
 333    AC_CHECK_TYPE([uint32_t],[scm_stdint_has_uint32=1],,[#include <stdint.h>])
 334    AC_CHECK_TYPE([int64_t],[scm_stdint_has_int64=1],,[#include <stdint.h>])
 335    AC_CHECK_TYPE([uint64_t],[scm_stdint_has_uint64=1],,[#include <stdint.h>])
 336    AC_CHECK_TYPE([intmax_t],[scm_stdint_has_intmax=1],,[#include <stdint.h>])
 337    AC_CHECK_TYPE([uintmax_t],[scm_stdint_has_uintmax=1],,[#include <stdint.h>])
 338    AC_CHECK_TYPE([intptr_t],[scm_stdint_has_intptr=1],,[#include <stdint.h>])
 339    AC_CHECK_TYPE([uintptr_t],[scm_stdint_has_uintptr=1],,[#include <stdint.h>])
 340 fi
 341
 342 # so we don't get confused by the cache (wish there was a better way
 343 # to check particular headers for the same type...)
 344
 345 unset ac_cv_type_int8_t
 346 unset ac_cv_type_uint8_t
 347 unset ac_cv_type_int16_t
 348 unset ac_cv_type_uint16_t
 349 unset ac_cv_type_int32_t
 350 unset ac_cv_type_uint32_t
 351 unset ac_cv_type_int64_t
 352 unset ac_cv_type_uint64_t
 353 unset ac_cv_type_intmax_t
 354 unset ac_cv_type_uintmax_t
 355
 356 ### See what's provided by inttypes.h
 357 if test "$ac_cv_header_inttypes_h" = yes; then
 358   AC_CHECK_TYPE([int8_t],[scm_inttypes_has_int8=1],,[#include <inttypes.h>])
 359   AC_CHECK_TYPE([uint8_t],[scm_inttypes_has_uint8=1],,[#include <inttypes.h>])
 360   AC_CHECK_TYPE([int16_t],[scm_inttypes_has_int16=1],,[#include <inttypes.h>])
 361   AC_CHECK_TYPE([uint16_t],[scm_inttypes_has_uint16=1],,[#include <inttypes.h>])
 362   AC_CHECK_TYPE([int32_t],[scm_inttypes_has_int32=1],,[#include <inttypes.h>])
 363   AC_CHECK_TYPE([uint32_t],[scm_inttypes_has_uint32=1],,[#include <inttypes.h>])
 364   AC_CHECK_TYPE([int64_t],[scm_inttypes_has_int64=1],,[#include <inttypes.h>])
 365   AC_CHECK_TYPE([uint64_t],[scm_inttypes_has_uint64=1],,[#include <inttypes.h>])
 366   AC_CHECK_TYPE([intmax_t],[scm_inttypes_has_intmax=1],,[#include <inttypes.h>])
 367   AC_CHECK_TYPE([uintmax_t],[scm_inttypes_has_uintmax=1],,[#include <inttypes.h>])
 368   AC_CHECK_TYPE([intptr_t],[scm_inttypes_has_intptr=1],,[#include <inttypes.h>])
 369   AC_CHECK_TYPE([uintptr_t],[scm_inttypes_has_uintptr=1],,[#include <inttypes.h>])
 370 fi
 371
 372 # Try hard to find definitions for some required scm_t_*int* types.
 373
 374 ### Required type scm_t_int8
 375 if test "$scm_stdint_has_int8"; then
 376   SCM_I_GSC_T_INT8='"int8_t"'
 377   SCM_I_GSC_NEEDS_STDINT_H=1
 378 elif test "$scm_inttypes_has_int8"; then
 379   SCM_I_GSC_T_INT8='"int8_t"'
 380   SCM_I_GSC_NEEDS_INTTYPES_H=1
 381 elif test "$ac_cv_sizeof_char" -eq 1; then
 382   SCM_I_GSC_T_INT8='"signed char"'
 383 else
 384   AC_MSG_ERROR([Can't find appropriate type for scm_t_int8.])
 385 fi
 386 AC_SUBST([SCM_I_GSC_T_INT8])
 387
 388 ### Required type scm_t_uint8
 389 if test "$scm_stdint_has_uint8"; then
 390   SCM_I_GSC_T_UINT8='"uint8_t"'
 391   SCM_I_GSC_NEEDS_STDINT_H=1
 392 elif test "$scm_inttypes_has_uint8"; then
 393   SCM_I_GSC_T_UINT8='"uint8_t"'
 394   SCM_I_GSC_NEEDS_INTTYPES_H=1
 395 elif test "$ac_cv_sizeof_unsigned_char" -eq 1; then
 396   SCM_I_GSC_T_UINT8='"unsigned char"'
 397 else
 398   AC_MSG_ERROR([Can't find appropriate type for scm_t_uint8.])
 399 fi
 400 AC_SUBST([SCM_I_GSC_T_UINT8])
 401
 402 ### Required type scm_t_int16 (ANSI C says int or short might work)
 403 if test "$scm_stdint_has_int16"; then
 404   SCM_I_GSC_T_INT16='"int16_t"'
 405   SCM_I_GSC_NEEDS_STDINT_H=1
 406 elif test "$scm_inttypes_has_int16"; then
 407   SCM_I_GSC_T_INT16='"int16_t"'
 408   SCM_I_GSC_NEEDS_INTTYPES_H=1
 409 elif test "$ac_cv_sizeof_int" -eq 2; then
 410   SCM_I_GSC_T_INT16='"int"'
 411 elif test "$ac_cv_sizeof_short" -eq 2; then
 412   SCM_I_GSC_T_INT16='"short"'
 413 else
 414   AC_MSG_ERROR([Can't find appropriate type for scm_t_int16.])
 415 fi
 416 AC_SUBST([SCM_I_GSC_T_INT16])
 417
 418 ### Required type scm_t_uint16 (ANSI C says int or short might work)
 419 if test "$scm_stdint_has_uint16"; then
 420   SCM_I_GSC_T_UINT16='"uint16_t"'
 421   SCM_I_GSC_NEEDS_STDINT_H=1
 422 elif test "$scm_inttypes_has_uint16"; then
 423   SCM_I_GSC_T_UINT16='"uint16_t"'
 424   SCM_I_GSC_NEEDS_INTTYPES_H=1
 425 elif test "$ac_cv_sizeof_unsigned_int" -eq 2; then
 426   SCM_I_GSC_T_UINT16='"unsigned int"'
 427 elif test "$ac_cv_sizeof_unsigned_short" -eq 2; then
 428   SCM_I_GSC_T_UINT16='"unsigned short"'
 429 else
 430   AC_MSG_ERROR([Can't find appropriate type for scm_t_uint16.])
 431 fi
 432 AC_SUBST([SCM_I_GSC_T_UINT16])
 433
 434
 435 ### Required type scm_t_int32 (ANSI C says int, short, or long might work)
 436 if test "$scm_stdint_has_int32"; then
 437   SCM_I_GSC_T_INT32='"int32_t"'
 438   SCM_I_GSC_NEEDS_STDINT_H=1
 439 elif test "$scm_inttypes_has_int32"; then
 440   SCM_I_GSC_T_INT32='"int32_t"'
 441   SCM_I_GSC_NEEDS_INTTYPES_H=1
 442 elif test "$ac_cv_sizeof_int" -eq 4; then
 443   SCM_I_GSC_T_INT32='"int"'
 444 elif test "$ac_cv_sizeof_long" -eq 4; then
 445   SCM_I_GSC_T_INT32='"long"'
 446 elif test "$ac_cv_sizeof_short" -eq 4; then
 447   SCM_I_GSC_T_INT32='"short"'
 448 else
 449   AC_MSG_ERROR([Can't find appropriate type for scm_t_int32.])
 450 fi
 451 AC_SUBST([SCM_I_GSC_T_INT32])
 452
 453 ### Required type scm_t_uint32 (ANSI C says int, short, or long might work)
 454 if test "$scm_stdint_has_uint32"; then
 455   SCM_I_GSC_T_UINT32='"uint32_t"'
 456   SCM_I_GSC_NEEDS_STDINT_H=1
 457 elif test "$scm_inttypes_has_uint32"; then
 458   SCM_I_GSC_T_UINT32='"uint32_t"'
 459   SCM_I_GSC_NEEDS_INTTYPES_H=1
 460 elif test "$ac_cv_sizeof_unsigned_int" -eq 4; then
 461   SCM_I_GSC_T_UINT32='"unsigned int"'
 462 elif test "$ac_cv_sizeof_unsigned_long" -eq 4; then
 463   SCM_I_GSC_T_UINT32='"unsigned long"'
 464 elif test "$ac_cv_sizeof_unsigned_short" -eq 4; then
 465   SCM_I_GSC_T_UINT32='"unsigned short"'
 466 else
 467   AC_MSG_ERROR([Can't find appropriate type for scm_t_uint32.])
 468 fi
 469 AC_SUBST([SCM_I_GSC_T_UINT32])
 470
 471 ### Optional type scm_t_int64 (ANSI C says int, short, or long might work)
 472 ### Also try 'long long' and '__int64' if we have it.
 473 SCM_I_GSC_T_INT64=0
 474 if test "$scm_stdint_has_int64"; then
 475   SCM_I_GSC_T_INT64='"int64_t"'
 476   SCM_I_GSC_NEEDS_STDINT_H=1
 477 elif test "$scm_inttypes_has_int64"; then
 478   SCM_I_GSC_T_INT64='"int64_t"'
 479   SCM_I_GSC_NEEDS_INTTYPES_H=1
 480 elif test "$ac_cv_sizeof_int" -eq 8; then
 481   SCM_I_GSC_T_INT64='"int"'
 482 elif test "$ac_cv_sizeof_long" -eq 8; then
 483   SCM_I_GSC_T_INT64='"long"'
 484 elif test "$ac_cv_sizeof_short" -eq 8; then
 485   SCM_I_GSC_T_INT64='"short"'
 486 elif test "$ac_cv_sizeof_long_long" -eq 8; then
 487   SCM_I_GSC_T_INT64='"long long"'
 488 elif test "$ac_cv_sizeof___int64" -eq 8; then
 489   SCM_I_GSC_T_INT64='"__int64"'
 490 else
 491   AC_MSG_ERROR([Can't find appropriate type for scm_t_int64.])
 492 fi
 493 AC_SUBST([SCM_I_GSC_T_INT64])
 494
 495
 496 ### Optional type scm_t_uint64 (ANSI C says int, short, or long might work)
 497 ### Also try 'long long' and '__int64' if we have it.
 498 SCM_I_GSC_T_UINT64=0
 499 if test "$scm_stdint_has_uint64"; then
 500   SCM_I_GSC_T_UINT64='"uint64_t"'
 501   SCM_I_GSC_NEEDS_STDINT_H=1
 502 elif test "$scm_inttypes_has_uint64"; then
 503   SCM_I_GSC_T_UINT64='"uint64_t"'
 504   SCM_I_GSC_NEEDS_INTTYPES_H=1
 505 elif test "$ac_cv_sizeof_unsigned_int" -eq 8; then
 506   SCM_I_GSC_T_UINT64='"unsigned int"'
 507 elif test "$ac_cv_sizeof_unsigned_long" -eq 8; then
 508   SCM_I_GSC_T_UINT64='"unsigned long"'
 509 elif test "$ac_cv_sizeof_unsigned_short" -eq 8; then
 510   SCM_I_GSC_T_UINT64='"unsigned short"'
 511 elif test "$ac_cv_sizeof_unsigned_long_long" -eq 8; then
 512   SCM_I_GSC_T_UINT64='"unsigned long long"'
 513 elif test "$ac_cv_sizeof_unsigned___int64" -eq 8; then
 514   SCM_I_GSC_T_UINT64='"unsigned __int64"'
 515 else
 516   AC_MSG_ERROR([Can't find appropriate type for scm_t_uint64.])
 517 fi
 518 AC_SUBST([SCM_I_GSC_T_UINT64])
 519
 520 ### Required type scm_t_intmax
 521 ###
 522 ### We try 'intmax_t', '__int64', 'long long' in this order.  When
 523 ### none of them is available, we use 'long'.
 524 ###
 525 SCM_I_GSC_T_INTMAX=0
 526 if test "$scm_stdint_has_intmax"; then
 527   SCM_I_GSC_T_INTMAX='"intmax_t"'
 528   SCM_I_GSC_NEEDS_STDINT_H=1
 529 elif test "$scm_inttypes_has_intmax"; then
 530   SCM_I_GSC_T_INTMAX='"intmax_t"'
 531   SCM_I_GSC_NEEDS_INTTYPES_H=1
 532 elif test "$ac_cv_sizeof___int64" -ne 0; then
 533   SCM_I_GSC_T_INTMAX='"__int64"'
 534 elif test "$ac_cv_sizeof_long_long" -ne 0; then
 535   SCM_I_GSC_T_INTMAX='"long long"'
 536 else
 537   SCM_I_GSC_T_INTMAX='"long"'
 538 fi
 539 AC_SUBST([SCM_I_GSC_T_INTMAX])
 540
 541 ### Required type scm_t_uintmax
 542 ###
 543 ### We try 'uintmax_t', 'unsigned __int64', 'unsigned long long' in
 544 ### this order.  When none of them is available, we use 'unsigned long'.
 545 ###
 546 SCM_I_GSC_T_UINTMAX=0
 547 if test "$scm_stdint_has_uintmax"; then
 548   SCM_I_GSC_T_UINTMAX='"uintmax_t"'
 549   SCM_I_GSC_NEEDS_STDINT_H=1
 550 elif test "$scm_inttypes_has_uintmax"; then
 551   SCM_I_GSC_T_UINTMAX='"uintmax_t"'
 552   SCM_I_GSC_NEEDS_INTTYPES_H=1
 553 elif test "$ac_cv_sizeof_unsigned___int64" -ne 0; then
 554   SCM_I_GSC_T_UINTMAX='"unsigned __int64"'
 555 elif test "$ac_cv_sizeof_unsigned_long_long" -ne 0; then
 556   SCM_I_GSC_T_UINTMAX='"unsigned long long"'
 557 else
 558   SCM_I_GSC_T_UINTMAX='"unsigned long"'
 559 fi
 560 AC_SUBST([SCM_I_GSC_T_UINTMAX])
 561
 562 ### Required type scm_t_intptr
 563 ###
 564 SCM_I_GSC_T_INTPTR=0
 565 if test "$scm_stdint_has_intptr"; then
 566   SCM_I_GSC_T_INTPTR='"intptr_t"'
 567   SCM_I_GSC_NEEDS_STDINT_H=1
 568 elif test "$scm_inttypes_has_intptr"; then
 569   SCM_I_GSC_T_INTPTR='"intptr_t"'
 570   SCM_I_GSC_NEEDS_INTTYPES_H=1
 571 elif test "$ac_cv_sizeof_int" = "$ac_cv_sizeof_void_p"; then
 572   SCM_I_GSC_T_INTPTR='"int"'
 573 elif test "$ac_cv_sizeof_long" = "$ac_cv_sizeof_void_p"; then
 574   SCM_I_GSC_T_INTPTR='"long"'
 575 elif test "$ac_cv_sizeof_long_long" = "$ac_cv_sizeof_void_p"; then
 576   SCM_I_GSC_T_INTPTR='"long long"'
 577 else
 578   AC_MSG_ERROR([Can't find appropriate type for `scm_t_intptr'.])
 579 fi
 580 AC_SUBST([SCM_I_GSC_T_INTPTR])
 581
 582 ### Required type scm_t_uintptr
 583 ###
 584 SCM_I_GSC_T_UINTPTR=0
 585 if test "$scm_stdint_has_uintptr"; then
 586   SCM_I_GSC_T_UINTPTR='"uintptr_t"'
 587   SCM_I_GSC_NEEDS_STDINT_H=1
 588 elif test "$scm_inttypes_has_uintptr"; then
 589   SCM_I_GSC_T_UINTPTR='"uintptr_t"'
 590   SCM_I_GSC_NEEDS_INTTYPES_H=1
 591 elif test "$ac_cv_sizeof_int" = "$ac_cv_sizeof_void_p"; then
 592   SCM_I_GSC_T_UINTPTR='"unsigned int"'
 593 elif test "$ac_cv_sizeof_long" = "$ac_cv_sizeof_void_p"; then
 594   SCM_I_GSC_T_UINTPTR='"unsigned long"'
 595 elif test "$ac_cv_sizeof_long_long" = "$ac_cv_sizeof_void_p"; then
 596   SCM_I_GSC_T_UINTPTR='"unsigned long long"'
 597 else
 598   AC_MSG_ERROR([Can't find appropriate type for `scm_t_uintptr'.])
 599 fi
 600 AC_SUBST([SCM_I_GSC_T_UINTPTR])
 601
 602
 603 AC_SUBST([SCM_I_GSC_NEEDS_STDINT_H])
 604 AC_SUBST([SCM_I_GSC_NEEDS_INTTYPES_H])
 605
 606 AC_HEADER_STDC
 607 AC_HEADER_TIME
 608 AC_HEADER_SYS_WAIT
 609 AC_HEADER_DIRENT
 610
 611 # Reason for checking:
 612 #
 613 #   HP-UX 11.11 (at least) doesn't provide `struct dirent64', even
 614 #   with `_LARGEFILE64_SOURCE', so check whether it's available.
 615 #
 616 AC_CHECK_MEMBER([struct dirent64.d_name],
 617   [SCM_I_GSC_HAVE_STRUCT_DIRENT64=1], [SCM_I_GSC_HAVE_STRUCT_DIRENT64=0],
 618   [ #ifndef _LARGEFILE64_SOURCE
 619     # define _LARGEFILE64_SOURCE
 620     #endif
 621
 622     /* Per Autoconf manual.  */
 623     #include <sys/types.h>
 624     #ifdef HAVE_DIRENT_H
 625     # include <dirent.h>
 626     #else
 627     # define dirent direct
 628     # ifdef HAVE_SYS_NDIR_H
 629     #  include <sys/ndir.h>
 630     # endif
 631     # ifdef HAVE_SYS_DIR_H
 632     #  include <sys/dir.h>
 633     # endif
 634     # ifdef HAVE_NDIR_H
 635     #  include <ndir.h>
 636     # endif
 637     #endif ])
 638 AC_SUBST([SCM_I_GSC_HAVE_STRUCT_DIRENT64])
 639
 640 # Reasons for testing:
 641 #   complex.h - new in C99
 642 #   fenv.h - available in C99, but not older systems
 643 #   machine/fpu.h - on Tru64 5.1b, the declaration of fesetround(3) is in
 644 #     this file instead of <fenv.h>
 645 #   process.h - mingw specific
 646 #   langinfo.h, nl_types.h - SuS v2
 647 #
 648 AC_CHECK_HEADERS([complex.h fenv.h io.h libc.h limits.h malloc.h memory.h process.h string.h \
 649 regex.h rxposix.h rx/rxposix.h sys/dir.h sys/ioctl.h sys/select.h \
 650 sys/time.h sys/timeb.h sys/times.h sys/stdtypes.h sys/types.h \
 651 sys/utime.h time.h unistd.h utime.h pwd.h grp.h sys/utsname.h \
 652 direct.h langinfo.h nl_types.h machine/fpu.h poll.h])
 653
 654 # Reasons for testing:
 655 #   nl_item - lacking on Cygwin
 656 AC_CHECK_TYPES([nl_item], [], [],
 657   [[#ifdef HAVE_LANGINFO_H
 658     # include <langinfo.h>
 659     #endif
 660     #ifdef HAVE_NL_TYPES_H
 661     # include <nl_types.h>
 662     #endif]])
 663
 664 # "complex double" is new in C99, and "complex" is only a keyword if
 665 # <complex.h> is included
 666 AC_CHECK_TYPES(complex double,,,
 667 [#if HAVE_COMPLEX_H
 668 #include <complex.h>
 669 #endif])
 670
 671 # On MacOS X <sys/socklen.h> contains socklen_t, so must include that
 672 # when testing.
 673 AC_CHECK_TYPE(socklen_t, ,
 674   [AC_DEFINE_UNQUOTED([socklen_t], int,
 675                       [Define to `int' if <sys/socket.h> does not define.])],
 676   [#if HAVE_SYS_TYPES_H
 677 #include <sys/types.h>
 678 #endif
 679 #include <sys/socket.h>
 680 ])
 681
 682 AC_CHECK_TYPES([struct ip_mreq], , , [#include <netinet/in.h>])
 683
 684 GUILE_HEADER_LIBC_WITH_UNISTD
 685
 686 AC_TYPE_GETGROUPS
 687 AC_TYPE_SIGNAL
 688 AC_TYPE_MODE_T
 689
 690 # On mingw -lm is empty, so this test is unnecessary, but it's
 691 # harmless so we don't hard-code to suppress it.
 692 #
 693 AC_CHECK_LIB(m, cos)
 694
 695 AC_CHECK_FUNCS(gethostbyname)
 696 if test $ac_cv_func_gethostbyname = no; then
 697     AC_CHECK_LIB(nsl, gethostbyname)
 698 fi
 699
 700 AC_CHECK_FUNCS(connect)
 701 if test $ac_cv_func_connect = no; then
 702     AC_CHECK_LIB(socket, connect)
 703 fi
 704
 705 dnl
 706 dnl Check for Winsock and other functionality on Win32 (*not* CygWin)
 707 dnl
 708 EXTRA_DEFS=""
 709 case $host in
 710   *-*-mingw*)
 711     AC_CHECK_HEADER(winsock2.h, [AC_DEFINE([HAVE_WINSOCK2_H], 1,
 712       [Define if you have the <winsock2.h> header file.])])
 713     AC_CHECK_LIB(ws2_32, main)
 714     AC_LIBOBJ([win32-uname])
 715     AC_LIBOBJ([win32-dirent])
 716     if test "$enable_networking" = yes ; then
 717       AC_LIBOBJ([win32-socket])
 718     fi
 719     if test "$enable_shared" = yes ; then
 720       EXTRA_DEFS="-DSCM_IMPORT"
 721       AC_DEFINE([USE_DLL_IMPORT], 1,
 722         [Define if you need additional CPP macros on Win32 platforms.])
 723     fi
 724     ;;
 725 esac
 726 AC_SUBST(EXTRA_DEFS)
 727
 728 # Reasons for testing:
 729 #   crt_externs.h - Darwin specific
 730 #
 731 AC_CHECK_HEADERS([assert.h crt_externs.h])
 732
 733 # Reasons for testing:
 734 #   DINFINITY - OSF specific
 735 #   DQNAN - OSF specific
 736 #       (DINFINITY and DQNAN are actually global variables, not functions)
 737 #   chsize - an MS-DOS-ism, found in mingw
 738 #   cexp, clog - not in various pre-c99 systems, and note that it's possible
 739 #       for gcc to provide the "complex double" type but the system to not
 740 #       have functions like cexp and clog
 741 #   clog10 - not in mingw (though others like clog and csqrt are)
 742 #   fesetround - available in C99, but not older systems
 743 #   ftruncate - posix, but probably not older systems (current mingw
 744 #               has it as an inline for chsize)
 745 #   ioctl - not in mingw.
 746 #   gmtime_r - recent posix, not on old systems
 747 #   pipe - not in mingw
 748 #   _pipe - specific to mingw, taking 3 args
 749 #   poll - since posix 2001
 750 #   readdir_r - recent posix, not on old systems
 751 #   readdir64_r - not available on HP-UX 11.11
 752 #   stat64 - SuS largefile stuff, not on old systems
 753 #   sysconf - not on old systems
 754 #   truncate - not in mingw
 755 #   isblank - available as a GNU extension or in C99
 756 #   _NSGetEnviron - Darwin specific
 757 #   strcoll_l, newlocale - GNU extensions (glibc), also available on Darwin
 758 #   nl_langinfo - X/Open, not available on Windows.
 759 #   utimensat: posix.1-2008
 760 #   sched_getaffinity, sched_setaffinity: GNU extensions (glibc)
 761 #
 762 AC_CHECK_FUNCS([DINFINITY DQNAN cexp chsize clog clog10 ctermid fesetround ftime ftruncate fchown getcwd geteuid getsid gettimeofday gmtime_r ioctl lstat mkdir mknod nice pipe _pipe poll readdir_r readdir64_r readlink rename rmdir select setegid seteuid setlocale setpgid setsid sigaction siginterrupt stat64 strftime strptime symlink sync sysconf tcgetpgrp tcsetpgrp times uname waitpid strdup system usleep atexit on_exit chown link fcntl ttyname getpwent getgrent kill getppid getpgrp fork setitimer getitimer strchr strcmp index bcopy memcpy rindex truncate unsetenv isblank _NSGetEnviron strcoll strcoll_l newlocale nl_langinfo utimensat sched_getaffinity sched_setaffinity])
 763
 764 # Reasons for testing:
 765 #   netdb.h - not in mingw
 766 #   sys/param.h - not in mingw
 767 #   pthread.h - only available with pthreads.  ACX_PTHREAD doesn't
 768 #       check this specifically, we need it for the timespec test below.
 769 #   sethostname - the function itself check because it's not in mingw,
 770 #       the DECL is checked because Solaris 10 doens't have in any header
 771 #   hstrerror - on Tru64 5.1b the symbol is available in libc but the
 772 #       declaration isn't anywhere.
 773 #   cuserid - on Tru64 5.1b the declaration is documented to be available
 774 #       only with `_XOPEN_SOURCE' or some such.
 775 #
 776 AC_CHECK_HEADERS([crypt.h netdb.h pthread.h sys/param.h sys/resource.h sys/file.h sys/mman.h])
 777 AC_CHECK_FUNCS(chroot flock getlogin cuserid getpriority setpriority getpass sethostname gethostname)
 778 AC_CHECK_DECLS([sethostname, hstrerror, cuserid])
 779
 780 # crypt() may or may not be available, for instance in some countries there
 781 # are restrictions on cryptography.
 782 #
 783 # crypt() might be in libc (eg. OpenBSD), or it might be in a separate
 784 # -lcrypt library (eg. Debian GNU/Linux).
 785 #
 786 # On HP-UX 11, crypt() is in libc and there's a dummy libcrypt.a.  We must
 787 # be careful to avoid -lcrypt in this case, since libtool will see there's
 788 # only a static libcrypt and decide to build only a static libguile.
 789 #
 790 # AC_SEARCH_LIBS lets us add -lcrypt to LIBS only if crypt() is not in the
 791 # libraries already in that list.
 792 #
 793 AC_SEARCH_LIBS(crypt, crypt,
 794   [AC_DEFINE([HAVE_CRYPT],1,
 795              [Define to 1 if you have the `crypt' function.])])
 796
 797 # When compiling with GCC on some OSs (Solaris, AIX), _Complex_I doesn't
 798 # work; in the reported cases so far, 1.0fi works well instead.  According
 799 # to the C99 spec, the complex.h header must provide a working definition
 800 # of _Complex_I, so we always try _Complex_I first.  The 1.0fi fallback
 801 # is a workaround for the failure of some systems to conform to C99.
 802 if test "$ac_cv_type_complex_double" = yes; then
 803   AC_MSG_CHECKING([for i])
 804   AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 805 #if HAVE_COMPLEX_H
 806 #include <complex.h>
 807 #endif
 808 complex double z;
 809 ]], [[
 810 z = _Complex_I;
 811 ]])],
 812     [AC_DEFINE([GUILE_I],_Complex_I,[The imaginary unit (positive square root of -1).])
 813      AC_MSG_RESULT([_Complex_I])],
 814     [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 815 #if HAVE_COMPLEX_H
 816 #include <complex.h>
 817 #endif
 818 complex double z;
 819 ]],[[
 820 z = 1.0fi;
 821 ]])],
 822   [AC_DEFINE([GUILE_I],1.0fi)
 823    AC_MSG_RESULT([1.0fi])],
 824   [ac_cv_type_complex_double=no
 825    AC_MSG_RESULT([not available])])])
 826 fi
 827
 828 # glibc 2.3.6 (circa 2006) and various prior versions had a bug where
 829 # csqrt(-i) returned a negative real part, when it should be positive
 830 # for the principal root.
 831 #
 832 if test "$ac_cv_type_complex_double" = yes; then
 833
 834   AC_CACHE_CHECK([whether csqrt is usable],
 835     guile_cv_use_csqrt,
 836     [AC_RUN_IFELSE([AC_LANG_SOURCE([[
 837 #include <complex.h>
 838 /* "volatile" is meant to prevent gcc from calculating the sqrt as a
 839    constant, we want to test libc. */
 840 volatile complex double z = - _Complex_I;
 841 int
 842 main (void)
 843 {
 844   z = csqrt (z);
 845   if (creal (z) > 0.0)
 846     return 0;  /* good */
 847   else
 848     return 1;  /* bad */
 849 }]])],
 850     [guile_cv_use_csqrt=yes],
 851     [guile_cv_use_csqrt="no, glibc 2.3 bug"],
 852     [guile_cv_use_csqrt="yes, hopefully (cross-compiling)"])])
 853   case $guile_cv_use_csqrt in
 854     yes*)
 855       AC_DEFINE([HAVE_USABLE_CSQRT], 1, [Define to 1 if csqrt is bug-free])
 856       ;;
 857   esac
 858 fi
 859
 860 AC_CACHE_SAVE
 861
 862 dnl GMP tests
 863 AC_LIB_HAVE_LINKFLAGS([gmp],
 864   [],
 865   [#include <gmp.h>],
 866   [mpz_import (0, 0, 0, 0, 0, 0, 0);])
 867
 868 if test "x$HAVE_LIBGMP" != "xyes"; then
 869   AC_MSG_ERROR([GNU MP 4.1 or greater not found, see README])
 870 fi
 871
 872 dnl GNU libunistring is checked for by Gnulib's `libunistring' module.
 873 if test "x$LTLIBUNISTRING" = "x"; then
 874   AC_MSG_ERROR([GNU libunistring is required, please install it.])
 875 fi
 876
 877 dnl Libffi is needed to compile Guile's foreign function interface, but its
 878 dnl interface isn't exposed in Guile's API.
 879 PKG_CHECK_MODULES(LIBFFI, libffi)
 880 AC_SUBST(LIBFFI_CFLAGS)
 881 AC_SUBST(LIBFFI_LIBS)
 882
 883 dnl figure out approriate ffi type for size_t
 884 AC_CHECK_SIZEOF(size_t)
 885 AC_CHECK_SIZEOF(ssize_t)
 886 ffi_size_type=uint$(($ac_cv_sizeof_size_t*8))
 887 ffi_ssize_type=sint$(($ac_cv_sizeof_ssize_t*8))
 888 AC_DEFINE_UNQUOTED([ffi_type_size_t], ffi_type_${ffi_size_type},
 889                    [ffi type for size_t])
 890 AC_DEFINE_UNQUOTED([ffi_type_ssize_t], ffi_type_${ffi_ssize_type},
 891                    [ffi type for ssize_t])
 892
 893 dnl i18n tests
 894 #AC_CHECK_HEADERS([libintl.h])
 895 #AC_CHECK_FUNCS(gettext)
 896 #if test $ac_cv_func_gettext = no; then
 897 #   AC_CHECK_LIB(intl, gettext)
 898 #fi
 899 #AC_CHECK_FUNCS([bindtextdomain textdomain])
 900 AM_GNU_GETTEXT([external], [need-ngettext])
 901
 902 ### Some systems don't declare some functions.  On such systems, we
 903 ### need to at least provide our own K&R-style declarations.
 904
 905 ### GUILE_FUNC_DECLARED(function, headerfile)
 906
 907 ### Check for a declaration of FUNCTION in HEADERFILE; if it is
 908 ### not there, #define MISSING_FUNCTION_DECL.
 909 AC_DEFUN([GUILE_FUNC_DECLARED], [
 910   AC_CACHE_CHECK(for $1 declaration, guile_cv_func_$1_declared,
 911     AC_EGREP_HEADER($1, $2,
 912                     guile_cv_func_$1_declared=yes,
 913                     guile_cv_func_$1_declared=no))
 914   if test [x$guile_cv_func_]$1[_declared] = xno; then
 915     AC_DEFINE([MISSING_]translit($1, [a-z], [A-Z])[_DECL], 1,
 916       [Define if the operating system supplies $1 without declaring it.])
 917   fi
 918 ])
 919
 920 GUILE_FUNC_DECLARED(sleep, unistd.h)
 921 GUILE_FUNC_DECLARED(usleep, unistd.h)
 922
 923 AC_CHECK_DECLS([strptime],,,
 924 [#define _GNU_SOURCE /* ask glibc to give strptime prototype */
 925 #include <time.h>])
 926
 927 ### On some systems usleep has no return value.  If it does have one,
 928 ### we'd like to return it; otherwise, we'll fake it.
 929 AC_CACHE_CHECK([return type of usleep], guile_cv_func_usleep_return_type,
 930   [AC_EGREP_HEADER(changequote(<, >)<void[      ]+usleep>changequote([, ]),
 931                    unistd.h,
 932                    [guile_cv_func_usleep_return_type=void],
 933                    [guile_cv_func_usleep_return_type=int])])
 934 case "$guile_cv_func_usleep_return_type" in
 935   "void" )
 936     AC_DEFINE([USLEEP_RETURNS_VOID], 1,
 937       [Define if the system headers declare usleep to return void.])
 938   ;;
 939 esac
 940
 941 AC_CHECK_HEADER(sys/un.h, have_sys_un_h=1)
 942 if test -n "$have_sys_un_h" ; then
 943   AC_DEFINE([HAVE_UNIX_DOMAIN_SOCKETS], 1,
 944     [Define if the system supports Unix-domain (file-domain) sockets.])
 945 fi
 946
 947 AC_CHECK_FUNCS(getrlimit setrlimit)
 948
 949 AC_CHECK_FUNCS(socketpair getgroups setgroups setpwent pause tzset)
 950
 951 AC_CHECK_FUNCS(sethostent   gethostent   endhostent   dnl
 952                setnetent    getnetent    endnetent    dnl
 953                setprotoent  getprotoent  endprotoent  dnl
 954                setservent   getservent   endservent   dnl
 955                getnetbyaddr getnetbyname dnl
 956                inet_lnaof inet_makeaddr inet_netof hstrerror)
 957
 958 AC_CHECK_MEMBERS([struct sockaddr_in.sin_len],,,
 959 [#ifdef HAVE_SYS_TYPES_H
 960 #include <sys/types.h>
 961 #endif
 962 #include <netinet/in.h>])
 963
 964 AC_MSG_CHECKING(for __libc_stack_end)
 965 AC_CACHE_VAL(guile_cv_have_libc_stack_end,
 966 [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>
 967 extern char *__libc_stack_end;]],
 968    [[printf("%p", (char*) __libc_stack_end);]])],
 969    [guile_cv_have_libc_stack_end=yes],
 970    [guile_cv_have_libc_stack_end=no])])
 971 AC_MSG_RESULT($guile_cv_have_libc_stack_end)
 972
 973 if test $guile_cv_have_libc_stack_end = yes; then
 974   AC_DEFINE([HAVE_LIBC_STACK_END], 1,
 975            [Define if you have the __libc_stack_end variable.])
 976 fi
 977
 978 dnl Some systems do not declare this.  Some systems do declare it, as a
 979 dnl macro.  With cygwin it may be in a DLL.
 980
 981 AC_MSG_CHECKING(whether netdb.h declares h_errno)
 982 AC_CACHE_VAL(guile_cv_have_h_errno,
 983   [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <netdb.h>]],
 984                                       [[int a = h_errno;]])],
 985   [guile_cv_have_h_errno=yes],
 986   [guile_cv_have_h_errno=no])])
 987 AC_MSG_RESULT($guile_cv_have_h_errno)
 988 if test $guile_cv_have_h_errno = yes; then
 989   AC_DEFINE([HAVE_H_ERRNO], 1, [Define if h_errno is declared in netdb.h.])
 990 fi
 991
 992 AC_MSG_CHECKING(whether uint32_t is defined)
 993 AC_CACHE_VAL(guile_cv_have_uint32_t,
 994   [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
 995                    #if HAVE_STDINT_H
 996                    #include <stdint.h>
 997                    #endif
 998                    #ifndef HAVE_NETDB_H
 999                    #include <netdb.h>
1000                    #endif]],
1001                    [[uint32_t a;]])],
1002                    [guile_cv_have_uint32_t=yes],
1003                    [guile_cv_have_uint32_t=no])])
1004 AC_MSG_RESULT($guile_cv_have_uint32_t)
1005 if test $guile_cv_have_uint32_t = yes; then
1006   AC_DEFINE([HAVE_UINT32_T], 1,
1007     [Define if uint32_t typedef is defined when netdb.h is include.])
1008 fi
1009
1010 AC_MSG_CHECKING(for working IPv6 support)
1011 AC_CACHE_VAL(guile_cv_have_ipv6,
1012 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1013 #ifdef HAVE_SYS_TYPES_H
1014 #include <sys/types.h>
1015 #endif
1016 #include <netinet/in.h>
1017 #include <sys/socket.h>]],
1018 [[struct sockaddr_in6 a;  a.sin6_family = AF_INET6;]])],
1019 [guile_cv_have_ipv6=yes],
1020 [guile_cv_have_ipv6=no])])
1021 AC_MSG_RESULT($guile_cv_have_ipv6)
1022 if test $guile_cv_have_ipv6 = yes; then
1023   AC_DEFINE([HAVE_IPV6], 1, [Define if you want support for IPv6.])
1024 fi
1025
1026 # included in rfc2553 but not in older implementations, e.g., glibc 2.1.3.
1027 AC_MSG_CHECKING(whether sockaddr_in6 has sin6_scope_id)
1028 AC_CACHE_VAL(guile_cv_have_sin6_scope_id,
1029 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1030 #ifdef HAVE_SYS_TYPES_H
1031 #include <sys/types.h>
1032 #endif
1033 #include <netinet/in.h>]],
1034 [[struct sockaddr_in6 sok;  sok.sin6_scope_id = 0;]])],
1035 [guile_cv_have_sin6_scope_id=yes],
1036 [guile_cv_have_sin6_scope_id=no])])
1037 AC_MSG_RESULT($guile_cv_have_sin6_scope_id)
1038 if test $guile_cv_have_sin6_scope_id = yes; then
1039   AC_DEFINE([HAVE_SIN6_SCOPE_ID], 1,
1040     [Define this if your IPv6 has sin6_scope_id in sockaddr_in6 struct.])
1041 fi
1042
1043 # struct sockaddr_in6 field sin_len is only present on BSD systems
1044 AC_CHECK_MEMBERS([struct sockaddr_in6.sin6_len],,,
1045 [#ifdef HAVE_SYS_TYPES_H
1046 #include <sys/types.h>
1047 #endif
1048 #include <netinet/in.h>])
1049
1050 AC_MSG_CHECKING(whether localtime caches TZ)
1051 AC_CACHE_VAL(guile_cv_localtime_cache,
1052 [if test x$ac_cv_func_tzset = xyes; then
1053 AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <time.h>
1054 #if STDC_HEADERS
1055 # include <stdlib.h>
1056 #endif
1057 extern char **environ;
1058 unset_TZ ()
1059 {
1060   char **from, **to;
1061   for (to = from = environ; (*to = *from); from++)
1062     if (! (to[0][0] == 'T' && to[0][1] == 'Z' && to[0][2] == '='))
1063       to++;
1064 }
1065 char TZ_GMT0[] = "TZ=GMT0";
1066 char TZ_PST8[] = "TZ=PST8";
1067 main()
1068 {
1069   time_t now = time ((time_t *) 0);
1070   int hour_GMT0, hour_unset;
1071   if (putenv (TZ_GMT0) != 0)
1072     exit (1);
1073   hour_GMT0 = localtime (&now)->tm_hour;
1074   unset_TZ ();
1075   hour_unset = localtime (&now)->tm_hour;
1076   if (putenv (TZ_PST8) != 0)
1077     exit (1);
1078   if (localtime (&now)->tm_hour == hour_GMT0)
1079     exit (1);
1080   unset_TZ ();
1081   if (localtime (&now)->tm_hour != hour_unset)
1082     exit (1);
1083   exit (0);
1084 }]])],
1085 [guile_cv_localtime_cache=no],
1086 [guile_cv_localtime_cache=yes],
1087 [# If we have tzset, assume the worst when cross-compiling.
1088 guile_cv_localtime_cache=yes])
1089 else
1090         # If we lack tzset, report that localtime does not cache TZ,
1091         # since we can't invalidate the cache if we don't have tzset.
1092         guile_cv_localtime_cache=no
1093 fi])dnl
1094 AC_MSG_RESULT($guile_cv_localtime_cache)
1095 if test $guile_cv_localtime_cache = yes; then
1096   AC_DEFINE([LOCALTIME_CACHE], 1, [Define if localtime caches the TZ setting.])
1097 fi
1098
1099 if test "$enable_regex" = yes; then
1100    if test "$ac_cv_header_regex_h" = yes ||
1101       test "$ac_cv_header_rxposix_h" = yes ||
1102       test "$ac_cv_header_rx_rxposix_h" = yes; then
1103      GUILE_NAMED_CHECK_FUNC(regcomp, norx, [AC_LIBOBJ([regex-posix])],
1104      [AC_CHECK_LIB(rx, main)
1105       GUILE_NAMED_CHECK_FUNC(regcomp, rx, [AC_LIBOBJ([regex-posix])],
1106      [AC_CHECK_LIB(regex, main)
1107       GUILE_NAMED_CHECK_FUNC(regcomp, regex, [AC_LIBOBJ([regex-posix])])])]
1108      )
1109      dnl The following should not be necessary, but for some reason
1110      dnl autoheader misses it if we don't include it!
1111      if test "$ac_cv_func_regcomp_norx" = yes ||
1112         test "$ac_cv_func_regcomp_regex" = yes ||
1113         test "$ac_cv_func_regcomp_rx" = yes; then
1114        AC_DEFINE([HAVE_REGCOMP], 1,
1115          [This is included as part of a workaround for a autoheader bug.])
1116      fi
1117    fi
1118 fi
1119
1120 AC_REPLACE_FUNCS([strerror memmove mkstemp])
1121
1122 # Reasons for testing:
1123 #   asinh, acosh, atanh, trunc - C99 standard, generally not available on
1124 #                                older systems
1125 #   sincos - GLIBC extension
1126 #
1127 AC_CHECK_FUNCS(asinh acosh atanh copysign finite sincos trunc)
1128
1129 # C99 specifies isinf and isnan as macros.
1130 # HP-UX provides only macros, no functions.
1131 # glibc 2.3.2 provides both macros and functions.
1132 # IRIX 6.5 and Solaris 8 only provide functions.
1133 #
1134 # The following tests detect isinf and isnan either as functions or as
1135 # macros from <math.h>.  Plain AC_CHECK_FUNCS is insufficient, it doesn't
1136 # use <math.h> so doesn't detect on macro-only systems like HP-UX.
1137 #
1138 AC_MSG_CHECKING([for isinf])
1139 AC_LINK_IFELSE(AC_LANG_SOURCE(
1140 [[#include <math.h>
1141 volatile double x = 0.0;
1142 int main () { return (isinf(x) != 0); }]]),
1143   [AC_MSG_RESULT([yes])
1144    AC_DEFINE([HAVE_ISINF], 1,
1145              [Define to 1 if you have the `isinf' macro or function.])],
1146   [AC_MSG_RESULT([no])])
1147 AC_MSG_CHECKING([for isnan])
1148 AC_LINK_IFELSE(AC_LANG_SOURCE(
1149 [[#include <math.h>
1150 volatile double x = 0.0;
1151 int main () { return (isnan(x) != 0); }]]),
1152   [AC_MSG_RESULT([yes])
1153    AC_DEFINE([HAVE_ISNAN], 1,
1154              [Define to 1 if you have the `isnan' macro or function.])],
1155   [AC_MSG_RESULT([no])])
1156
1157 # Reasons for checking:
1158 #
1159 #     st_rdev
1160 #     st_blksize
1161 #     st_blocks   not in mingw
1162 #     tm_gmtoff   BSD+GNU, not in C99
1163 #
1164 # Note AC_STRUCT_ST_BLOCKS is not used here because we don't want the
1165 # AC_LIBOBJ(fileblocks) replacement which that macro gives.
1166 #
1167 AC_CHECK_MEMBERS([struct stat.st_rdev, struct stat.st_blksize, struct stat.st_blocks, struct stat.st_atim, struct stat.st_mtim, struct stat.st_ctim],,,
1168                  [#define _GNU_SOURCE
1169 AC_INCLUDES_DEFAULT
1170 ])
1171
1172 AC_STRUCT_TIMEZONE
1173 AC_CHECK_MEMBERS([struct tm.tm_gmtoff],,,
1174 [#include <time.h>
1175 #ifdef TIME_WITH_SYS_TIME
1176 # include <sys/time.h>
1177 # include <time.h>
1178 #else
1179 # if HAVE_SYS_TIME_H
1180 #  include <sys/time.h>
1181 # else
1182 #  include <time.h>
1183 # endif
1184 #endif
1185 ])
1186 GUILE_STRUCT_UTIMBUF
1187
1188
1189 #--------------------------------------------------------------------
1190 #
1191 # Which way does the stack grow?
1192 #
1193 # Following code comes from Autoconf 2.61's internal _AC_LIBOBJ_ALLOCA
1194 # macro (/usr/share/autoconf/autoconf/functions.m4).  Gnulib has
1195 # very similar code, so in future we could look at using that.
1196 #
1197 # An important detail is that the code involves find_stack_direction
1198 # calling _itself_ - which means that find_stack_direction (or at
1199 # least the second find_stack_direction() call) cannot be inlined.
1200 # If the code could be inlined, that might cause the test to give
1201 # an incorrect answer.
1202 #--------------------------------------------------------------------
1203
1204 SCM_I_GSC_STACK_GROWS_UP=0
1205 AC_RUN_IFELSE([AC_LANG_SOURCE(
1206 [AC_INCLUDES_DEFAULT
1207 int
1208 find_stack_direction ()
1209 {
1210   static char *addr = 0;
1211   auto char dummy;
1212   if (addr == 0)
1213     {
1214       addr = &dummy;
1215       return find_stack_direction ();
1216     }
1217   else
1218     return (&dummy > addr) ? 1 : -1;
1219 }
1220
1221 int
1222 main ()
1223 {
1224   return find_stack_direction () < 0;
1225 }])],
1226                [SCM_I_GSC_STACK_GROWS_UP=1],
1227                [],
1228                [AC_MSG_WARN(Guessing that stack grows down -- see scmconfig.h)])
1229
1230 #--------------------------------------------------------------------
1231 #
1232 # Boehm's GC library
1233 #
1234 #--------------------------------------------------------------------
1235 PKG_CHECK_MODULES([BDW_GC], [bdw-gc])
1236
1237 save_LIBS="$LIBS"
1238 LIBS="$BDW_GC_LIBS $LIBS"
1239 CFLAGS="$BDW_GC_CFLAGS $CFLAGS"
1240
1241 AC_CHECK_FUNCS([GC_do_blocking GC_call_with_gc_active GC_pthread_exit GC_pthread_cancel GC_allow_register_threads])
1242
1243 # Though the `GC_do_blocking ()' symbol is present in GC 7.1, it is not
1244 # declared, and has a different type (returning void instead of
1245 # void*).
1246 AC_CHECK_DECL([GC_do_blocking],
1247   [AC_DEFINE([HAVE_DECL_GC_DO_BLOCKING], [1],
1248     [Define this if the `GC_do_blocking ()' function is declared])],
1249   [],
1250   [#include <gc/gc.h>])
1251
1252 # `GC_fn_type' is not available in GC 7.1 and earlier.
1253 AC_CHECK_TYPE([GC_fn_type],
1254   [AC_DEFINE([HAVE_GC_FN_TYPE], [1],
1255     [Define this if the `GC_fn_type' type is available.])],
1256   [],
1257   [#include <gc/gc.h>])
1258
1259 # `GC_stack_base' is not available in GC 7.1 and earlier.
1260 AC_CHECK_TYPE([struct GC_stack_base],
1261   [AC_DEFINE([HAVE_GC_STACK_BASE], [1],
1262     [Define this if the `GC_stack_base' type is available.])],
1263   [],
1264   [#include <gc/gc.h>])
1265
1266 LIBS="$save_LIBS"
1267
1268
1269 AC_CHECK_SIZEOF(float)
1270 if test "$ac_cv_sizeof_float" -le "$ac_cv_sizeof_long"; then
1271     AC_DEFINE([SCM_SINGLES], 1,
1272               [Define this if floats are the same size as longs.])
1273 fi
1274
1275 AC_MSG_CHECKING(for struct linger)
1276 AC_CACHE_VAL(scm_cv_struct_linger,
1277         AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1278 #include <sys/types.h>
1279 #include <sys/socket.h>]],
1280                           [[struct linger lgr;  lgr.l_linger = 100]])],
1281                           [scm_cv_struct_linger="yes"],
1282                           [scm_cv_struct_linger="no"]))
1283 AC_MSG_RESULT($scm_cv_struct_linger)
1284 if test $scm_cv_struct_linger = yes; then
1285         AC_DEFINE([HAVE_STRUCT_LINGER], 1,
1286           [Define this if your system defines struct linger, for use with the
1287            getsockopt and setsockopt system calls.])
1288 fi
1289
1290
1291 # On mingw, struct timespec is in <pthread.h>.
1292 #
1293 AC_MSG_CHECKING(for struct timespec)
1294 AC_CACHE_VAL(scm_cv_struct_timespec,
1295         AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1296 #include <time.h>
1297 #if HAVE_PTHREAD_H
1298 #include <pthread.h>
1299 #endif]], [[struct timespec t;  t.tv_nsec = 100]])],
1300           [scm_cv_struct_timespec="yes"],
1301           [scm_cv_struct_timespec="no"]))
1302 AC_MSG_RESULT($scm_cv_struct_timespec)
1303 if test $scm_cv_struct_timespec = yes; then
1304   AC_DEFINE([HAVE_STRUCT_TIMESPEC], 1,
1305     [Define this if your system defines struct timespec via either <time.h> or <pthread.h>.])
1306 fi
1307
1308 #--------------------------------------------------------------------
1309 #
1310 # Flags for thread support
1311 #
1312 #--------------------------------------------------------------------
1313
1314 SCM_I_GSC_USE_PTHREAD_THREADS=0
1315 SCM_I_GSC_USE_NULL_THREADS=0
1316 AC_SUBST([SCM_I_GSC_USE_PTHREAD_THREADS])
1317 AC_SUBST([SCM_I_GSC_USE_NULL_THREADS])
1318
1319 ### What thread package has the user asked for?
1320 AC_ARG_WITH(threads, [  --with-threads          thread interface],
1321             , with_threads=yes)
1322
1323 AC_SUBST(SCM_I_GSC_NEED_BRACES_ON_PTHREAD_ONCE_INIT, 0)
1324 AC_SUBST(SCM_I_GSC_NEED_BRACES_ON_PTHREAD_MUTEX_INITIALIZER, 0)
1325
1326 case "$with_threads" in
1327   "yes" | "pthread" | "pthreads" | "pthread-threads" | "")
1328
1329     build_pthread_support="yes"
1330
1331     ACX_PTHREAD([CC="$PTHREAD_CC"
1332        LIBS="$PTHREAD_LIBS $LIBS"
1333        SCM_I_GSC_USE_PTHREAD_THREADS=1
1334        with_threads="pthreads"],
1335       [with_threads="null"
1336        build_pthread_support="no"])
1337
1338     old_CFLAGS="$CFLAGS"
1339     CFLAGS="$PTHREAD_CFLAGS $CFLAGS"
1340
1341     # Reasons for testing:
1342     #     pthread_getattr_np - "np" meaning "non portable" says it
1343     #         all; not present on MacOS X or Solaris 10
1344     #     pthread_get_stackaddr_np - "np" meaning "non portable" says it
1345     #         all; specific to MacOS X
1346     #     pthread_sigmask - not available on mingw
1347     #
1348     AC_CHECK_FUNCS(pthread_attr_getstack pthread_getattr_np pthread_get_stackaddr_np pthread_sigmask)
1349
1350     # On past versions of Solaris, believe 8 through 10 at least, you
1351     # had to write "pthread_once_t foo = { PTHREAD_ONCE_INIT };".
1352     # This is contrary to POSIX:
1353     # http://www.opengroup.org/onlinepubs/000095399/functions/pthread_once.html
1354     # Check here if this style is required.
1355     #
1356     # glibc (2.3.6 at least) works both with or without braces, so the
1357     # test checks whether it works without.
1358     #
1359
1360     if test "$GCC" = "yes"; then
1361       # Since GCC only issues a warning for missing braces, so we need
1362       # `-Werror' to catch it.
1363       CFLAGS="-Werror -Wmissing-braces $CFLAGS"
1364     fi
1365
1366     AC_CACHE_CHECK([whether PTHREAD_ONCE_INIT needs braces],
1367       guile_cv_need_braces_on_pthread_once_init,
1368       [AC_COMPILE_IFELSE([#include <pthread.h>
1369          pthread_once_t foo = PTHREAD_ONCE_INIT;],
1370         [guile_cv_need_braces_on_pthread_once_init=no],
1371         [guile_cv_need_braces_on_pthread_once_init=yes])])
1372     if test "$guile_cv_need_braces_on_pthread_once_init" = yes; then
1373       SCM_I_GSC_NEED_BRACES_ON_PTHREAD_ONCE_INIT=1
1374     fi
1375
1376     # Same problem with `PTHREAD_MUTEX_INITIALIZER', e.g., on IRIX
1377     # 6.5.30m with GCC 3.3.
1378     AC_CACHE_CHECK([whether PTHREAD_MUTEX_INITIALIZER needs braces],
1379       guile_cv_need_braces_on_pthread_mutex_initializer,
1380       [AC_COMPILE_IFELSE([#include <pthread.h>
1381          pthread_mutex_t foo = PTHREAD_MUTEX_INITIALIZER;],
1382         [guile_cv_need_braces_on_pthread_mutex_initializer=no],
1383         [guile_cv_need_braces_on_pthread_mutex_initializer=yes])])
1384     if test "$guile_cv_need_braces_on_pthread_mutex_initializer" = yes; then
1385       SCM_I_GSC_NEED_BRACES_ON_PTHREAD_MUTEX_INITIALIZER=1
1386     fi
1387
1388     CFLAGS="$old_CFLAGS"
1389
1390     # On Solaris, sched_yield lives in -lrt.
1391     AC_SEARCH_LIBS(sched_yield, rt)
1392
1393   ;;
1394 esac
1395
1396 case "$with_threads" in
1397   "pthreads")
1398   ;;
1399   "no" | "null")
1400     SCM_I_GSC_USE_NULL_THREADS=1
1401     SCM_I_GSC_HAVE_THREAD_STORAGE_CLASS=0
1402     with_threads="null-threads"
1403   ;;
1404   * )
1405     AC_MSG_ERROR(invalid value for --with-threads: $with_threads)
1406   ;;
1407 esac
1408
1409 AC_MSG_CHECKING(what kind of threads to support)
1410 AC_MSG_RESULT($with_threads)
1411
1412 AM_CONDITIONAL([BUILD_PTHREAD_SUPPORT],
1413   [test "x$build_pthread_support" = "xyes"])
1414
1415
1416 ## Check whether pthread_attr_getstack works for the main thread
1417
1418 if test "$with_threads" = pthreads; then
1419
1420 AC_MSG_CHECKING([whether pthread_attr_getstack works for the main thread])
1421 old_CFLAGS="$CFLAGS"
1422 CFLAGS="$PTHREAD_CFLAGS $CFLAGS"
1423 if test "$cross_compiling" = "no"; then
1424   AC_RUN_IFELSE([AC_LANG_SOURCE([[
1425   #if HAVE_PTHREAD_ATTR_GETSTACK
1426   #include <pthread.h>
1427
1428   int main ()
1429   {
1430     pthread_attr_t attr;
1431     void *start, *end;
1432     size_t size;
1433
1434     pthread_getattr_np (pthread_self (), &attr);
1435     pthread_attr_getstack (&attr, &start, &size);
1436     end = (char *)start + size;
1437
1438     if ((void *)&attr < start || (void *)&attr >= end)
1439       return 1;
1440     else
1441       return 0;
1442   }
1443   #else
1444   int main ()
1445   {
1446     return 1;
1447   }
1448   #endif
1449   ]])],
1450   [works=yes
1451    AC_DEFINE([PTHREAD_ATTR_GETSTACK_WORKS], [1], [Define when pthread_att_get_stack works for the main thread])],
1452   [works=no],
1453   [])
1454 else
1455   works="assuming it doesn't"
1456 fi
1457 CFLAGS="$old_CFLAGS"
1458 AC_MSG_RESULT($works)
1459
1460 GUILE_THREAD_LOCAL_STORAGE
1461
1462 fi # with_threads=pthreads
1463
1464
1465 ## Cross building
1466 if test "$cross_compiling" = "yes"; then
1467   AC_MSG_CHECKING(cc for build)
1468   ## /usr/bin/cc still uses wrong assembler
1469   ## CC_FOR_BUILD="${CC_FOR_BUILD-/usr/bincc}"
1470   CC_FOR_BUILD="${CC_FOR_BUILD-PATH=/usr/bin:$PATH cc}"
1471 else
1472   CC_FOR_BUILD="${CC_FOR_BUILD-$CC}"
1473 fi
1474
1475 ## AC_MSG_CHECKING("if we are cross compiling")
1476 ## AC_MSG_RESULT($cross_compiling)
1477 if test "$cross_compiling" = "yes"; then
1478    AC_MSG_RESULT($CC_FOR_BUILD)
1479 fi
1480
1481 ## No need as yet to be more elaborate
1482 CCLD_FOR_BUILD="$CC_FOR_BUILD"
1483
1484 AC_SUBST(cross_compiling)
1485 AC_ARG_VAR(CC_FOR_BUILD,[build system C compiler])
1486 AC_SUBST(CCLD_FOR_BUILD)
1487
1488 ## libtool erroneously calls CC_FOR_BUILD HOST_CC;
1489 ## --HOST is the platform that PACKAGE is compiled for.
1490 HOST_CC="$CC_FOR_BUILD"
1491 AC_SUBST(HOST_CC)
1492
1493 if test "$cross_compiling" = "yes"; then
1494   AC_MSG_CHECKING(guile for build)
1495   GUILE_FOR_BUILD="${GUILE_FOR_BUILD-guile}"
1496 else
1497   GUILE_FOR_BUILD='this-value-will-never-be-used'
1498 fi
1499
1500 ## AC_MSG_CHECKING("if we are cross compiling")
1501 ## AC_MSG_RESULT($cross_compiling)
1502 if test "$cross_compiling" = "yes"; then
1503    AC_MSG_RESULT($GUILE_FOR_BUILD)
1504 fi
1505 AC_ARG_VAR(GUILE_FOR_BUILD,[guile for build system])
1506 AM_SUBST_NOTMAKE(GUILE_FOR_BUILD)
1507
1508 ## If we're using GCC, ask for aggressive warnings.
1509 GCC_CFLAGS=""
1510 case "$GCC" in
1511   yes )
1512     ## We had -Wstrict-prototypes in here for a bit, but Guile does too
1513     ## much stuff with generic function pointers for that to really be
1514     ## less than exasperating.
1515     ## -Wpointer-arith was here too, but something changed in gcc/glibc
1516     ## and it became equally exasperating (gcc 2.95 and/or glibc 2.1.2).
1517     POTENTIAL_GCC_CFLAGS="-Wall -Wmissing-prototypes \
1518       -Wdeclaration-after-statement -Wundef \
1519       -Wswitch-enum"
1520     # Do this here so we don't screw up any of the tests above that might
1521     # not be "warning free"
1522     if test "${GUILE_ERROR_ON_WARNING}" = yes
1523     then
1524         POTENTIAL_GCC_CFLAGS="${POTENTIAL_GCC_CFLAGS} -Werror"
1525         enable_compile_warnings=no
1526     fi
1527
1528     for flag in $POTENTIAL_GCC_CFLAGS
1529     do
1530         gl_WARN_ADD([$flag], [GCC_CFLAGS])
1531     done
1532     ;;
1533 esac
1534
1535 AC_SUBST(GCC_CFLAGS)
1536
1537 # Check for GNU ld's "-z relro".
1538 GUILE_GNU_LD_RELRO
1539
1540
1541 ## If we're creating a shared library (using libtool!), then we'll
1542 ## need to generate a list of .lo files corresponding to the .o files
1543 ## given in LIBOBJS.  We'll call it LIBLOBJS.
1544 LIBLOBJS="`echo ${LIB@&t@OBJS} | sed 's,\.[[^.]]* ,.lo ,g;s,\.[[^.]]*$,.lo,'`"
1545
1546 ## We also need to create corresponding .doc and .x files
1547 EXTRA_DOT_DOC_FILES="`echo ${LIB@&t@OBJS} | sed 's,\.[[^.]]* ,.doc ,g;s,\.[[^.]]*$,.doc,'`"
1548 EXTRA_DOT_X_FILES="`echo ${LIB@&t@OBJS} | sed 's,\.[[^.]]* ,.x ,g;s,\.[[^.]]*$,.x,'`"
1549
1550 # GNU Readline bindings.
1551 GUILE_READLINE
1552
1553 AC_SUBST(GUILE_MAJOR_VERSION)
1554 AC_SUBST(GUILE_MINOR_VERSION)
1555 AC_SUBST(GUILE_MICRO_VERSION)
1556 AC_SUBST(GUILE_EFFECTIVE_VERSION)
1557 AC_SUBST(GUILE_VERSION)
1558
1559 #######################################################################
1560 # library versioning
1561
1562 AC_SUBST(LIBGUILE_INTERFACE_CURRENT)
1563 AC_SUBST(LIBGUILE_INTERFACE_REVISION)
1564 AC_SUBST(LIBGUILE_INTERFACE_AGE)
1565 AC_SUBST(LIBGUILE_INTERFACE)
1566
1567 AC_SUBST(LIBGUILE_I18N_MAJOR)
1568 AC_SUBST(LIBGUILE_I18N_INTERFACE_CURRENT)
1569 AC_SUBST(LIBGUILE_I18N_INTERFACE_REVISION)
1570 AC_SUBST(LIBGUILE_I18N_INTERFACE_AGE)
1571 AC_SUBST(LIBGUILE_I18N_INTERFACE)
1572
1573
1574 #######################################################################
1575
1576 dnl Tell guile-config what flags guile users should compile and link
1577 dnl with, keeping only `-I' flags from $CPPFLAGS.
1578 GUILE_CFLAGS=""
1579 next_is_includedir=false
1580 for flag in $CPPFLAGS
1581 do
1582   if $next_is_includedir; then
1583     GUILE_CFLAGS="$GUILE_CFLAGS -I $flag"
1584     next_is_includedir=false
1585   else
1586     case "$flag" in
1587       -I)  next_is_includedir=true;;
1588       -I*) GUILE_CFLAGS="$GUILE_CFLAGS $flag";;
1589       *)   ;;
1590     esac
1591   fi
1592 done
1593
1594 GUILE_CFLAGS="$GUILE_CFLAGS $PTHREAD_CFLAGS"
1595 GUILE_LIBS="$LDFLAGS $LIBS"
1596
1597 AC_SUBST(GUILE_LIBS)
1598 AC_SUBST(GUILE_CFLAGS)
1599
1600 AC_SUBST(AWK)
1601 AC_SUBST(LIBLOBJS)
1602 AC_SUBST(EXTRA_DOT_DOC_FILES)
1603 AC_SUBST(EXTRA_DOT_X_FILES)
1604
1605 dnl See also top_builddir in info node: (libtool)AC_PROG_LIBTOOL
1606 top_builddir_absolute=`pwd`
1607 AC_SUBST(top_builddir_absolute)
1608 top_srcdir_absolute=`(cd $srcdir && pwd)`
1609 AC_SUBST(top_srcdir_absolute)
1610
1611 dnl `sitedir' goes into libpath.h and the pkg-config file.
1612 pkgdatadir="$datadir/$PACKAGE_TARNAME"
1613 sitedir="$pkgdatadir/site/$GUILE_EFFECTIVE_VERSION"
1614 AC_SUBST([sitedir])
1615
1616 # Additional SCM_I_GSC definitions are above.
1617 AC_SUBST([SCM_I_GSC_GUILE_DEBUG])
1618 AC_SUBST([SCM_I_GSC_ENABLE_DEPRECATED])
1619 AC_SUBST([SCM_I_GSC_STACK_GROWS_UP])
1620 AC_SUBST([SCM_I_GSC_C_INLINE])
1621 AC_CONFIG_FILES([libguile/gen-scmconfig.h])
1622
1623 AC_CONFIG_FILES([
1624   Makefile
1625   am/Makefile
1626   lib/Makefile
1627   benchmark-suite/Makefile
1628   gc-benchmarks/Makefile
1629   doc/Makefile
1630   doc/r5rs/Makefile
1631   doc/ref/Makefile
1632   emacs/Makefile
1633   examples/Makefile
1634   libguile/Makefile
1635   libguile/version.h
1636   guile-readline/Makefile
1637   test-suite/Makefile
1638   test-suite/standalone/Makefile
1639   test-suite/vm/Makefile
1640   meta/Makefile
1641   module/Makefile
1642 ])
1643
1644 AC_CONFIG_FILES([meta/guile-2.0.pc])
1645 AC_CONFIG_FILES([meta/guile-2.0-uninstalled.pc])
1646 AC_CONFIG_FILES([doc/ref/effective-version.texi])
1647
1648 GUILE_CONFIG_SCRIPT([check-guile])
1649 GUILE_CONFIG_SCRIPT([benchmark-guile])
1650 GUILE_CONFIG_SCRIPT([meta/guile])
1651 GUILE_CONFIG_SCRIPT([meta/uninstalled-env])
1652 GUILE_CONFIG_SCRIPT([meta/gdb-uninstalled-guile])
1653 GUILE_CONFIG_SCRIPT([meta/guile-tools])
1654 GUILE_CONFIG_SCRIPT([libguile/guile-snarf])
1655 GUILE_CONFIG_SCRIPT([libguile/guile-snarf-docs])
1656 GUILE_CONFIG_SCRIPT([test-suite/standalone/test-use-srfi])
1657 GUILE_CONFIG_SCRIPT([test-suite/standalone/test-fast-slot-ref])
1658
1659 AC_OUTPUT
1660
1661 dnl Local Variables:
1662 dnl comment-start: "dnl "
1663 dnl comment-end: ""
1664 dnl comment-start-skip: "\\bdnl\\b\\s *"
1665 dnl End: