aclocal.m4

   1 dnl aclocal.m4 generated automatically by aclocal 1.2c
   2
   3 dnl Copyright (C) 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
   4 dnl This Makefile.in is free software; the Free Software Foundation
   5 dnl gives unlimited permission to copy and/or distribute it,
   6 dnl with or without modifications, as long as this notice is preserved.
   7
   8 dnl This program is distributed in the hope that it will be useful,
   9 dnl but WITHOUT ANY WARRANTY, to the extent permitted by law; without
  10 dnl even the implied warranty of MERCHANTABILITY or FITNESS FOR A
  11 dnl PARTICULAR PURPOSE.
  12
  13 dnl  On the NeXT, #including <utime.h> doesn't give you a definition for
  14 dnl  struct utime, unless you #define _POSIX_SOURCE.
  15
  16 AC_DEFUN(GUILE_STRUCT_UTIMBUF, [
  17   AC_CACHE_CHECK([whether we need POSIX to get struct utimbuf],
  18     guile_cv_struct_utimbuf_needs_posix,
  19     [AC_TRY_CPP([
  20 #ifdef __EMX__
  21 #include <sys/utime.h>
  22 #else
  23 #include <utime.h>
  24 #endif
  25 struct utime blah;
  26 ],
  27                 guile_cv_struct_utimbuf_needs_posix=no,
  28                 guile_cv_struct_utimbuf_needs_posix=yes)])
  29   if test "$guile_cv_struct_utimbuf_needs_posix" = yes; then
  30      AC_DEFINE(UTIMBUF_NEEDS_POSIX)
  31   fi])
  32
  33
  34
  35
  36 dnl
  37 dnl Apparently, at CMU they have a weird version of libc.h that is
  38 dnl installed in /usr/local/include and conflicts with unistd.h.
  39 dnl In these situations, we should not #include libc.h.
  40 dnl This test arranges to #define LIBC_H_WITH_UNISTD_H iff libc.h is
  41 dnl present on the system, and is safe to #include.
  42 dnl
  43 AC_DEFUN([GUILE_HEADER_LIBC_WITH_UNISTD],
  44   [
  45     AC_CHECK_HEADERS(libc.h unistd.h)
  46     AC_CACHE_CHECK(
  47       "whether libc.h and unistd.h can be included together",
  48       guile_cv_header_libc_with_unistd,
  49       [
  50         if test "$ac_cv_header_libc_h" = "no"; then
  51           guile_cv_header_libc_with_unistd="no"
  52         elif test "$ac_cv_header_unistd.h" = "no"; then
  53           guile_cv_header_libc_with_unistd="yes"
  54         else
  55           AC_TRY_COMPILE(
  56             [
  57 #             include <libc.h>
  58 #             include <unistd.h>
  59             ],
  60             [],
  61             [guile_cv_header_libc_with_unistd=yes],
  62             [guile_cv_header_libc_with_unistd=no]
  63           )
  64         fi
  65       ]
  66     )
  67     if test "$guile_cv_header_libc_with_unistd" = yes; then
  68       AC_DEFINE(LIBC_H_WITH_UNISTD_H)
  69     fi
  70   ]
  71 )
  72
  73
  74
  75 dnl This is needed when we want to check for the same function repeatedly
  76 dnl with other parameters, such as libraries, varying.
  77 dnl
  78 dnl GUILE_NAMED_CHECK_FUNC(FUNCTION, TESTNAME,
  79 dnl                        [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
  80 AC_DEFUN(GUILE_NAMED_CHECK_FUNC,
  81 [AC_MSG_CHECKING([for $1])
  82 AC_CACHE_VAL(ac_cv_func_$1_$2,
  83 [AC_TRY_LINK(
  84 dnl Don't include <ctype.h> because on OSF/1 3.0 it includes <sys/types.h>
  85 dnl which includes <sys/select.h> which contains a prototype for
  86 dnl select.  Similarly for bzero.
  87 [/* System header to define __stub macros and hopefully few prototypes,
  88     which can conflict with char $1(); below.  */
  89 #include <assert.h>
  90 /* Override any gcc2 internal prototype to avoid an error.  */
  91 ]ifelse(AC_LANG, CPLUSPLUS, [#ifdef __cplusplus
  92 extern "C"
  93 #endif
  94 ])dnl
  95 [/* We use char because int might match the return type of a gcc2
  96     builtin and then its argument prototype would still apply.  */
  97 char $1();
  98 ], [
  99 /* The GNU C library defines this for functions which it implements
 100     to always fail with ENOSYS.  Some functions are actually named
 101     something starting with __ and the normal name is an alias.  */
 102 #if defined (__stub_$1) || defined (__stub___$1)
 103 choke me
 104 #else
 105 $1();
 106 #endif
 107 ], eval "ac_cv_func_$1_$2=yes", eval "ac_cv_func_$1_$2=no")])
 108 if eval "test \"`echo '$ac_cv_func_'$1'_'$2`\" = yes"; then
 109   AC_MSG_RESULT(yes)
 110   ifelse([$3], , :, [$3])
 111 else
 112   AC_MSG_RESULT(no)
 113 ifelse([$4], , , [$4
 114 ])dnl
 115 fi
 116 ])
 117
 118
 119
 120 dnl Check checks whether dlsym (if present) requires a leading underscore.
 121 dnl Written by Dan Hagerty <hag@ai.mit.edu> for scsh-0.5.0.
 122 AC_DEFUN(GUILE_DLSYM_USCORE, [
 123   AC_MSG_CHECKING(for underscore before symbols)
 124   AC_CACHE_VAL(guile_cv_uscore,[
 125     echo "main(){int i=1;}
 126     fnord(){int i=23; int ltuae=42;}" > conftest.c
 127     ${CC} conftest.c > /dev/null
 128     if (nm a.out | grep _fnord) > /dev/null; then
 129       guile_cv_uscore=yes
 130     else
 131       guile_cv_uscore=no
 132     fi])
 133   AC_MSG_RESULT($guile_cv_uscore)
 134   rm -f conftest.c a.out
 135
 136   if test $guile_cv_uscore = yes; then
 137     AC_DEFINE(USCORE)
 138
 139     if test $ac_cv_func_dlopen = yes -o $ac_cv_lib_dl_dlopen = yes ; then
 140         AC_MSG_CHECKING(whether dlsym always adds an underscore for us)
 141         AC_CACHE_VAL(guile_cv_dlsym_adds_uscore,AC_TRY_RUN( [
 142 #include <dlfcn.h>
 143 #include <stdio.h>
 144 fnord() { int i=42;}
 145 main() { void *self, *ptr1, *ptr2; self=dlopen(NULL,RTLD_LAZY);
 146     if(self) { ptr1=dlsym(self,"fnord"); ptr2=dlsym(self,"_fnord");
 147     if(ptr1 && !ptr2) exit(0); } exit(1); }
 148 ], [guile_cv_dlsym_adds_uscore=yes
 149         AC_DEFINE(DLSYM_ADDS_USCORE) ], guile_cv_dlsym_adds_uscore=no,
 150         guile_cv_dlsym_adds_uscore=no))
 151
 152         AC_MSG_RESULT($guile_cv_dlsym_adds_uscore)
 153     fi
 154   fi
 155 ])
 156
 157 # Do all the work for Automake.  This macro actually does too much --
 158 # some checks are only needed if your package does certain things.
 159 # But this isn't really a big deal.
 160
 161 # serial 1
 162
 163 dnl Usage:
 164 dnl AM_INIT_AUTOMAKE(package,version, [no-define])
 165
 166 AC_DEFUN(AM_INIT_AUTOMAKE,
 167 [AC_REQUIRE([AM_PROG_INSTALL])
 168 PACKAGE=[$1]
 169 AC_SUBST(PACKAGE)
 170 VERSION=[$2]
 171 AC_SUBST(VERSION)
 172 dnl test to see if srcdir already configured
 173 if test "`cd $srcdir && pwd`" != "`pwd`" && test -f $srcdir/config.status; then
 174   AC_MSG_ERROR([source directory already configured; run "make distclean" there first])
 175 fi
 176 ifelse([$3],,
 177 AC_DEFINE_UNQUOTED(PACKAGE, "$PACKAGE")
 178 AC_DEFINE_UNQUOTED(VERSION, "$VERSION"))
 179 AM_SANITY_CHECK
 180 AC_ARG_PROGRAM
 181 dnl FIXME This is truly gross.
 182 missing_dir=`cd $ac_aux_dir && pwd`
 183 AM_MISSING_PROG(ACLOCAL, aclocal, $missing_dir)
 184 AM_MISSING_PROG(AUTOCONF, autoconf, $missing_dir)
 185 AM_MISSING_PROG(AUTOMAKE, automake, $missing_dir)
 186 AM_MISSING_PROG(AUTOHEADER, autoheader, $missing_dir)
 187 AM_MISSING_PROG(MAKEINFO, makeinfo, $missing_dir)
 188 AC_PROG_MAKE_SET])
 189
 190
 191 # serial 1
 192
 193 AC_DEFUN(AM_PROG_INSTALL,
 194 [AC_REQUIRE([AC_PROG_INSTALL])
 195 test -z "$INSTALL_SCRIPT" && INSTALL_SCRIPT='${INSTALL_PROGRAM}'
 196 AC_SUBST(INSTALL_SCRIPT)dnl
 197 ])
 198
 199 #
 200 # Check to make sure that the build environment is sane.
 201 #
 202
 203 AC_DEFUN(AM_SANITY_CHECK,
 204 [AC_MSG_CHECKING([whether build environment is sane])
 205 # Just in case
 206 sleep 1
 207 echo timestamp > conftestfile
 208 # Do `set' in a subshell so we don't clobber the current shell's
 209 # arguments.  Must try -L first in case configure is actually a
 210 # symlink; some systems play weird games with the mod time of symlinks
 211 # (eg FreeBSD returns the mod time of the symlink's containing
 212 # directory).
 213 if (
 214    set X `ls -Lt $srcdir/configure conftestfile 2> /dev/null`
 215    if test "[$]*" = "X"; then
 216       # -L didn't work.
 217       set X `ls -t $srcdir/configure conftestfile`
 218    fi
 219    test "[$]2" = conftestfile
 220    )
 221 then
 222    # Ok.
 223    :
 224 else
 225    AC_MSG_ERROR([newly created file is older than distributed files!
 226 Check your system clock])
 227 fi
 228 rm -f conftest*
 229 AC_MSG_RESULT(yes)])
 230
 231 dnl AM_MISSING_PROG(NAME, PROGRAM, DIRECTORY)
 232 dnl The program must properly implement --version.
 233 AC_DEFUN(AM_MISSING_PROG,
 234 [AC_MSG_CHECKING(for working $2)
 235 # Run test in a subshell; some versions of sh will print an error if
 236 # an executable is not found, even if stderr is redirected.
 237 # Redirect stdin to placate older versions of autoconf.  Sigh.
 238 if ($2 --version) < /dev/null > /dev/null 2>&1; then
 239    $1=$2
 240    AC_MSG_RESULT(found)
 241 else
 242    $1="$3/missing $2"
 243    AC_MSG_RESULT(missing)
 244 fi
 245 AC_SUBST($1)])
 246
 247 # Add --enable-maintainer-mode option to configure.
 248 # From Jim Meyering
 249
 250 # serial 1
 251
 252 AC_DEFUN(AM_MAINTAINER_MODE,
 253 [AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
 254   dnl maintainer-mode is disabled by default
 255   AC_ARG_ENABLE(maintainer-mode,
 256 [  --enable-maintainer-mode enable make rules and dependencies not useful
 257                           (and sometimes confusing) to the casual installer],
 258       USE_MAINTAINER_MODE=$enableval,
 259       USE_MAINTAINER_MODE=no)
 260   AC_MSG_RESULT($USE_MAINTAINER_MODE)
 261   if test $USE_MAINTAINER_MODE = yes; then
 262     MAINT=
 263   else
 264     MAINT='#M#'
 265   fi
 266   AC_SUBST(MAINT)dnl
 267 ]
 268 )
 269
 270 # Like AC_CONFIG_HEADER, but automatically create stamp file.
 271
 272 AC_DEFUN(AM_CONFIG_HEADER,
 273 [AC_PREREQ([2.12])
 274 AC_CONFIG_HEADER([$1])
 275 dnl When config.status generates a header, we must update the stamp-h file.
 276 dnl This file resides in the same directory as the config header
 277 dnl that is generated.  We must strip everything past the first ":",
 278 dnl and everything past the last "/".
 279 AC_OUTPUT_COMMANDS(changequote(<<,>>)dnl
 280 ifelse(patsubst(<<$1>>, <<[^ ]>>, <<>>), <<>>,
 281 <<test -z "<<$>>CONFIG_HEADERS" || echo timestamp > patsubst(<<$1>>, <<^\([^:]*/\)?.*>>, <<\1>>)stamp-h<<>>dnl>>,
 282 <<am_indx=1
 283 for am_file in <<$1>>; do
 284   case " <<$>>CONFIG_HEADERS " in
 285   *" <<$>>am_file "*<<)>>
 286     echo timestamp > `echo <<$>>am_file | sed -e 's%:.*%%' -e 's%[^/]*$%%'`stamp-h$am_indx
 287     ;;
 288   esac
 289   am_indx=`expr "<<$>>am_indx" + 1`
 290 done<<>>dnl>>)
 291 changequote([,]))])
 292
 293
 294 # serial 17 AM_PROG_LIBTOOL
 295 AC_DEFUN(AM_PROG_LIBTOOL,
 296 [AC_REQUIRE([AC_CANONICAL_HOST])
 297 AC_REQUIRE([AC_PROG_RANLIB])
 298 AC_REQUIRE([AC_PROG_CC])
 299 AC_REQUIRE([AM_PROG_LD])
 300 AC_REQUIRE([AM_PROG_NM])
 301 AC_REQUIRE([AC_PROG_LN_S])
 302
 303 # Always use our own libtool.
 304 LIBTOOL='$(SHELL) $(top_builddir)/libtool'
 305 AC_SUBST(LIBTOOL)
 306
 307 dnl Allow the --disable-shared flag to stop us from building shared libs.
 308 AC_ARG_ENABLE(shared,
 309 [  --enable-shared         build shared libraries [default=yes]],
 310 [if test "$enableval" = no; then
 311   libtool_enable_shared=no
 312 else
 313   libtool_enable_shared=yes
 314 fi])
 315 test -n "$libtool_enable_shared" && enable_shared="$libtool_enable_shared"
 316 libtool_shared=
 317 test "$enable_shared" = no && libtool_shared=" --disable-shared"
 318
 319 dnl Allow the --disable-static flag to stop us from building static libs.
 320 AC_ARG_ENABLE(static,
 321 [  --enable-static         build static libraries [default=yes]],
 322 [if test "$enableval" = no; then
 323   libtool_enable_static=no
 324 else
 325   libtool_enable_static=yes
 326 fi])
 327 test -n "$libtool_enable_static" && enable_static="$libtool_enable_static"
 328 libtool_static=
 329 test "$enable_static" = no && libtool_static=" --disable-static"
 330
 331 libtool_flags="$libtool_shared$libtool_static"
 332 test "$silent" = yes && libtool_flags="$libtool_flags --silent"
 333 test "$ac_cv_prog_gcc" = yes && libtool_flags="$libtool_flags --with-gcc"
 334 test "$ac_cv_prog_gnu_ld" = yes && libtool_flags="$libtool_flags --with-gnu-ld"
 335
 336 # Some flags need to be propagated to the compiler or linker for good
 337 # libtool support.
 338 [case "$host" in
 339 *-*-irix6*)
 340   ac_save_CFLAGS="$CFLAGS"
 341   flag_passed=no
 342   for f in -32 -64 -n32 ABI -cckr -mips1 -mips2 -mips3 -mips4; do
 343     case "$f" in
 344     ABI)
 345       test -n "$SGI_ABI" && flag_passed=yes
 346       if test "$flag_passed" = no && test "$ac_cv_prog_gcc" = yes; then
 347         # Choose the ABI flag according to GCC's specs.
 348         if $CC -dumpspecs 2>&1 | sed '/^\*link:$/,/^$/!d' | egrep -e '[         ]-32' >/dev/null; then
 349           LD="${LD-ld} -32"
 350         else
 351           LD="${LD-ld} -n32"
 352         fi
 353       fi
 354       ;;
 355
 356     *)
 357       if echo " $CC $CFLAGS " | egrep -e "[     ]$f[     ]" > /dev/null; then
 358         flag_passed=yes
 359         LD="${LD-ld} $f"
 360       fi
 361       ;;
 362     esac
 363   done
 364   CFLAGS="$ac_save_CFLAGS"
 365   ;;
 366
 367 *-*-sco3.2v5*)
 368   # On SCO OpenServer 5, we need -belf to get full-featured binaries.
 369   CFLAGS="$CFLAGS -belf"
 370   ;;
 371 esac]
 372
 373 # Actually configure libtool.  ac_aux_dir is where install-sh is found.
 374 CC="$CC" CFLAGS="$CFLAGS" CPPFLAGS="$CPPFLAGS" \
 375 LD="$LD" NM="$NM" RANLIB="$RANLIB" LN_S="$LN_S" \
 376 ${CONFIG_SHELL-/bin/sh} $ac_aux_dir/ltconfig \
 377 $libtool_flags --no-verify $ac_aux_dir/ltmain.sh $host \
 378 || AC_MSG_ERROR([libtool configure failed])
 379 ])
 380
 381 # AM_PROG_LD - find the path to the GNU or non-GNU linker
 382 AC_DEFUN(AM_PROG_LD,
 383 [AC_ARG_WITH(gnu-ld,
 384 [  --with-gnu-ld           assume the C compiler uses GNU ld [default=no]],
 385 test "$withval" = no || with_gnu_ld=yes, with_gnu_ld=no)
 386 AC_REQUIRE([AC_PROG_CC])
 387 ac_prog=ld
 388 if test "$ac_cv_prog_gcc" = yes; then
 389   # Check if gcc -print-prog-name=ld gives a path.
 390   AC_MSG_CHECKING([for ld used by GCC])
 391   ac_prog=`($CC -print-prog-name=ld) 2>&5`
 392   case "$ac_prog" in
 393   # Accept absolute paths.
 394   /*)
 395     test -z "$LD" && LD="$ac_prog"
 396     ;;
 397   "")
 398     # If it fails, then pretend we aren't using GCC.
 399     ac_prog=ld
 400     ;;
 401   *)
 402     # If it is relative, then search for the first ld in PATH.
 403     with_gnu_ld=unknown
 404     ;;
 405   esac
 406 elif test "$with_gnu_ld" = yes; then
 407   AC_MSG_CHECKING([for GNU ld])
 408 else
 409   AC_MSG_CHECKING([for non-GNU ld])
 410 fi
 411 AC_CACHE_VAL(ac_cv_path_LD,
 412 [if test -z "$LD"; then
 413   IFS="${IFS=   }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
 414   for ac_dir in $PATH; do
 415     test -z "$ac_dir" && ac_dir=.
 416     if test -f "$ac_dir/$ac_prog"; then
 417       ac_cv_path_LD="$ac_dir/$ac_prog"
 418       # Check to see if the program is GNU ld.  I'd rather use --version,
 419       # but apparently some GNU ld's only accept -v.
 420       # Break only if it was the GNU/non-GNU ld that we prefer.
 421       if "$ac_cv_path_LD" -v 2>&1 < /dev/null | egrep '(GNU|with BFD)' > /dev/null; then
 422         test "$with_gnu_ld" != no && break
 423       else
 424         test "$with_gnu_ld" != yes && break
 425       fi
 426     fi
 427   done
 428   IFS="$ac_save_ifs"
 429 else
 430   ac_cv_path_LD="$LD" # Let the user override the test with a path.
 431 fi])
 432 LD="$ac_cv_path_LD"
 433 if test -n "$LD"; then
 434   AC_MSG_RESULT($LD)
 435 else
 436   AC_MSG_RESULT(no)
 437 fi
 438 test -z "$LD" && AC_MSG_ERROR([no acceptable ld found in \$PATH])
 439 AC_SUBST(LD)
 440 AM_PROG_LD_GNU
 441 ])
 442
 443 AC_DEFUN(AM_PROG_LD_GNU,
 444 [AC_CACHE_CHECK([if the linker ($LD) is GNU ld], ac_cv_prog_gnu_ld,
 445 [# I'd rather use --version here, but apparently some GNU ld's only accept -v.
 446 if $LD -v 2>&1 </dev/null | egrep '(GNU|with BFD)' 1>&5; then
 447   ac_cv_prog_gnu_ld=yes
 448 else
 449   ac_cv_prog_gnu_ld=no
 450 fi])
 451 ])
 452
 453 # AM_PROG_NM - find the path to a BSD-compatible name lister
 454 AC_DEFUN(AM_PROG_NM,
 455 [AC_MSG_CHECKING([for BSD-compatible nm])
 456 AC_CACHE_VAL(ac_cv_path_NM,
 457 [case "$NM" in
 458 /*)
 459   ac_cv_path_NM="$NM" # Let the user override the test with a path.
 460   ;;
 461 *)
 462   IFS="${IFS=   }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
 463   for ac_dir in /usr/ucb $PATH /bin; do
 464     test -z "$ac_dir" && dir=.
 465     if test -f $ac_dir/nm; then
 466       # Check to see if the nm accepts a BSD-compat flag.
 467       if ($ac_dir/nm -B /dev/null 2>&1; exit 0) | grep /dev/null >/dev/null; then
 468         ac_cv_path_NM="$ac_dir/nm -B"
 469       elif ($ac_dir/nm -p /dev/null 2>&1; exit 0) | grep /dev/null >/dev/null; then
 470         ac_cv_path_NM="$ac_dir/nm -p"
 471       else
 472         ac_cv_path_NM="$ac_dir/nm"
 473       fi
 474       break
 475     fi
 476   done
 477   IFS="$ac_save_ifs"
 478   test -z "$ac_cv_path_NM" && ac_cv_path_NM=nm
 479   ;;
 480 esac])
 481 NM="$ac_cv_path_NM"
 482 AC_MSG_RESULT([$NM])
 483 AC_SUBST(NM)
 484 ])
 485
 486 dnl
 487 dnl CY_AC_WITH_THREADS determines which thread library the user intends
 488 dnl to put underneath guile.  Pass it the path to find the guile top-level
 489 dnl source directory.  Eg CY_AC_WITH_THREADS(../..) for tcl/unix.
 490 dnl
 491
 492 AC_DEFUN([CY_AC_WITH_THREADS],[
 493 AC_CACHE_CHECK("threads package type",cy_cv_threads_package,[
 494 AC_CACHE_VAL(cy_cv_threads_cflags,[
 495 AC_CACHE_VAL(cy_cv_threads_libs,[
 496 use_threads=no;
 497 AC_ARG_WITH(threads,[  --with-threads          thread interface],
 498             use_threads=$withval, use_threads=no)
 499 test -n "$use_threads" || use_threads=qt
 500 threads_package=unknown
 501 if test "$use_threads" != no; then
 502 dnl
 503 dnl Test for the qt threads package - used for cooperative threads
 504 dnl This may not necessarily be built yet - so just check for the
 505 dnl header files.
 506 dnl
 507   if test "$use_threads" = yes || test "$use_threads" = qt; then
 508      # Look for qt in source directory.
 509      if test -f $srcdir/qt/qt.c; then
 510         qtsrcdir="`(cd $srcdir; pwd)`/qt"
 511         threads_package=COOP
 512         cy_cv_threads_cflags="-I$qtsrcdir -I../qt"
 513         cy_cv_threads_libs="../qt/libqthreads.a"
 514      fi
 515   else
 516      if test -f $use_threads/qt.c; then
 517         # FIXME seems as though we should try to use an installed qt here.
 518         threads_package=COOP
 519         cy_cv_threads_cflags="-I$use_threads -I../qt"
 520         cy_cv_threads_libs="../qt/libqthreads.a"
 521      fi
 522   fi
 523   if test "$use_threads" = pthreads; then
 524      # Look for pthreads in srcdir.  See above to understand why
 525      # we always set threads_package.
 526      if test -f $srcdir/../../pthreads/pthreads/queue.c \
 527           || test -f $srcdir/../pthreads/pthreads/queue.c; then
 528         threads_package=MIT
 529         cy_cv_threads_cflags="-I$srcdir/../../pthreads/include"
 530         cy_cv_threads_libs="-L../../pthreads/lib -lpthread"
 531      fi
 532   fi
 533   saved_CPP="$CPPFLAGS"
 534   saved_LD="$LDFLAGS"
 535   saved_LIBS="$LIBS"
 536   if test "$threads_package" = unknown; then
 537 dnl
 538 dnl Test for the FSU threads package
 539 dnl
 540     CPPFLAGS="-I$use_threads/include"
 541     LDFLAGS="-L$use_threads/lib"
 542     LIBS="-lgthreads -lmalloc"
 543     AC_TRY_LINK([#include <pthread.h>],[
 544 pthread_equal(NULL,NULL);
 545 ], threads_package=FSU)
 546   fi
 547   if test "$threads_package" = unknown; then
 548 dnl
 549 dnl Test for the MIT threads package
 550 dnl
 551     LIBS="-lpthread"
 552     AC_TRY_LINK([#include <pthread.h>],[
 553 pthread_equal(NULL,NULL);
 554 ], threads_package=MIT)
 555   fi
 556   if test "$threads_package" = unknown; then
 557 dnl
 558 dnl Test for the PCthreads package
 559 dnl
 560     LIBS="-lpthreads"
 561     AC_TRY_LINK([#include <pthread.h>],[
 562 pthread_equal(NULL,NULL);
 563 ], threads_package=PCthreads)
 564   fi
 565 dnl
 566 dnl Set the appropriate flags!
 567 dnl
 568   cy_cv_threads_cflags="$CPPFLAGS $cy_cv_threads_cflags"
 569   cy_cv_threads_libs="$LDFLAGS $LIBS $cy_cv_threads_libs"
 570   cy_cv_threads_package=$threads_package
 571   CPPFLAGS="$saved_CPP"
 572   LDFLAGS="$saved_LD"
 573   LIBS="$saved_LIBS"
 574   if test "$threads_package" = unknown; then
 575     AC_MSG_ERROR("cannot find thread library installation")
 576   fi
 577 fi
 578 ])
 579 ])
 580 ],
 581 dnl
 582 dnl Set flags according to what is cached.
 583 dnl
 584 CPPFLAGS="$cy_cv_threads_cflags"
 585 LIBS="$cy_cv_threads_libs"
 586 )
 587 ])
 588