acinclude.m4

   1 dnl  On the NeXT, #including <utime.h> doesn't give you a definition for
   2 dnl  struct utime, unless you #define _POSIX_SOURCE.
   3
   4 AC_DEFUN(GUILE_STRUCT_UTIMBUF, [
   5   AC_CACHE_CHECK([whether we need POSIX to get struct utimbuf],
   6     guile_cv_struct_utimbuf_needs_posix,
   7     [AC_TRY_CPP([
   8 #ifdef __EMX__
   9 #include <sys/utime.h>
  10 #else
  11 #include <utime.h>
  12 #endif
  13 struct utime blah;
  14 ],
  15                 guile_cv_struct_utimbuf_needs_posix=no,
  16                 guile_cv_struct_utimbuf_needs_posix=yes)])
  17   if test "$guile_cv_struct_utimbuf_needs_posix" = yes; then
  18      AC_DEFINE(UTIMBUF_NEEDS_POSIX)
  19   fi])
  20
  21
  22
  23
  24 dnl
  25 dnl Apparently, at CMU they have a weird version of libc.h that is
  26 dnl installed in /usr/local/include and conflicts with unistd.h.
  27 dnl In these situations, we should not #include libc.h.
  28 dnl This test arranges to #define LIBC_H_WITH_UNISTD_H iff libc.h is
  29 dnl present on the system, and is safe to #include.
  30 dnl
  31 AC_DEFUN([GUILE_HEADER_LIBC_WITH_UNISTD],
  32   [
  33     AC_CHECK_HEADERS(libc.h unistd.h)
  34     AC_CACHE_CHECK(
  35       "whether libc.h and unistd.h can be included together",
  36       guile_cv_header_libc_with_unistd,
  37       [
  38         if test "$ac_cv_header_libc_h" = "no"; then
  39           guile_cv_header_libc_with_unistd="no"
  40         elif test "$ac_cv_header_unistd_h" = "no"; then
  41           guile_cv_header_libc_with_unistd="yes"
  42         else
  43           AC_TRY_COMPILE(
  44             [
  45 #             include <libc.h>
  46 #             include <unistd.h>
  47             ],
  48             [],
  49             [guile_cv_header_libc_with_unistd=yes],
  50             [guile_cv_header_libc_with_unistd=no]
  51           )
  52         fi
  53       ]
  54     )
  55     if test "$guile_cv_header_libc_with_unistd" = yes; then
  56       AC_DEFINE(LIBC_H_WITH_UNISTD_H)
  57     fi
  58   ]
  59 )
  60
  61
  62
  63 dnl This is needed when we want to check for the same function repeatedly
  64 dnl with other parameters, such as libraries, varying.
  65 dnl
  66 dnl GUILE_NAMED_CHECK_FUNC(FUNCTION, TESTNAME,
  67 dnl                        [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
  68 AC_DEFUN(GUILE_NAMED_CHECK_FUNC,
  69 [AC_MSG_CHECKING([for $1])
  70 AC_CACHE_VAL(ac_cv_func_$1_$2,
  71 [AC_TRY_LINK(
  72 dnl Don't include <ctype.h> because on OSF/1 3.0 it includes <sys/types.h>
  73 dnl which includes <sys/select.h> which contains a prototype for
  74 dnl select.  Similarly for bzero.
  75 [/* System header to define __stub macros and hopefully few prototypes,
  76     which can conflict with char $1(); below.  */
  77 #include <assert.h>
  78 /* Override any gcc2 internal prototype to avoid an error.  */
  79 ]ifelse(AC_LANG, CPLUSPLUS, [#ifdef __cplusplus
  80 extern "C"
  81 #endif
  82 ])dnl
  83 [/* We use char because int might match the return type of a gcc2
  84     builtin and then its argument prototype would still apply.  */
  85 char $1();
  86 ], [
  87 /* The GNU C library defines this for functions which it implements
  88     to always fail with ENOSYS.  Some functions are actually named
  89     something starting with __ and the normal name is an alias.  */
  90 #if defined (__stub_$1) || defined (__stub___$1)
  91 choke me
  92 #else
  93 $1();
  94 #endif
  95 ], eval "ac_cv_func_$1_$2=yes", eval "ac_cv_func_$1_$2=no")])
  96 if eval "test \"`echo '$ac_cv_func_'$1'_'$2`\" = yes"; then
  97   AC_MSG_RESULT(yes)
  98   ifelse([$3], , :, [$3])
  99 else
 100   AC_MSG_RESULT(no)
 101 ifelse([$4], , , [$4
 102 ])dnl
 103 fi
 104 ])
 105
 106
 107
 108 dnl Check checks whether dlsym (if present) requires a leading underscore.
 109 dnl Written by Dan Hagerty <hag@ai.mit.edu> for scsh-0.5.0.
 110 AC_DEFUN(GUILE_DLSYM_USCORE, [
 111   AC_MSG_CHECKING(for underscore before symbols)
 112   AC_CACHE_VAL(guile_cv_uscore,[
 113     echo "main(){int i=1;}
 114     fnord(){int i=23; int ltuae=42;}" > conftest.c
 115     ${CC} conftest.c > /dev/null
 116     if (nm a.out | grep _fnord) > /dev/null; then
 117       guile_cv_uscore=yes
 118     else
 119       guile_cv_uscore=no
 120     fi])
 121   AC_MSG_RESULT($guile_cv_uscore)
 122   rm -f conftest.c a.out
 123
 124   if test $guile_cv_uscore = yes; then
 125     AC_DEFINE(USCORE)
 126
 127     if test $ac_cv_func_dlopen = yes -o $ac_cv_lib_dl_dlopen = yes ; then
 128         AC_MSG_CHECKING(whether dlsym always adds an underscore for us)
 129         AC_CACHE_VAL(guile_cv_dlsym_adds_uscore,AC_TRY_RUN( [
 130 #include <dlfcn.h>
 131 #include <stdio.h>
 132 fnord() { int i=42;}
 133 main() { void *self, *ptr1, *ptr2; self=dlopen(NULL,RTLD_LAZY);
 134     if(self) { ptr1=dlsym(self,"fnord"); ptr2=dlsym(self,"_fnord");
 135     if(ptr1 && !ptr2) exit(0); } exit(1); }
 136 ], [guile_cv_dlsym_adds_uscore=yes
 137         AC_DEFINE(DLSYM_ADDS_USCORE) ], guile_cv_dlsym_adds_uscore=no,
 138         guile_cv_dlsym_adds_uscore=no))
 139
 140         AC_MSG_RESULT($guile_cv_dlsym_adds_uscore)
 141     fi
 142   fi
 143 ])
 144
 145 dnl   QTHREADS_CONFIGURE configures the QuickThreads package.  The QT
 146 dnl   sources should be in $srcdir/qt.  If configuration succeeds, this
 147 dnl   macro creates the appropriate symlinks in the qt object directory,
 148 dnl   and sets the following variables, used in building libqthreads.a:
 149 dnl      QTHREAD_LTLIBS --- set to libqthreads.la if configuration
 150 dnl         succeeds, or the empty string if configuration fails.
 151 dnl      qtmd_h, qtmds_s, qtmdc_c, qtdmdb_s --- the names of the machine-
 152 dnl         dependent source files.
 153 dnl      qthread_asflags --- flags to pass to the compiler when processing
 154 dnl         assembly-language files.
 155 dnl
 156 dnl   It also sets the following variables, which describe how clients
 157 dnl   can link against libqthreads.a:
 158 dnl      THREAD_PACKAGE --- set to "QT" if configuration succeeds, or
 159 dnl         the empty string if configuration fails.
 160 dnl      THREAD_CPPFLAGS --- set to `-I' flags for thread header files
 161 dnl      THREAD_LIBS_LOCAL --- linker options for use in this source tree
 162 dnl      THREAD_LIBS_INSTALLED --- linker options for use after this package
 163 dnl         is installed
 164 dnl   It would be nice if all thread configuration packages for Guile
 165 dnl   followed the same conventions.
 166 dnl
 167 dnl   All of the above variables will be substituted into Makefiles in
 168 dnl   the usual autoconf fashion.
 169 dnl
 170 dnl   We distinguish between THREAD_LIBS_LOCAL and
 171 dnl   THREAD_LIBS_INSTALLED because the thread library might be in
 172 dnl   this tree, and be built using libtool.  This means that:
 173 dnl      1) when building other executables in this tree, one must
 174 dnl         pass the relative path to the ../libfoo.la file, but
 175 dnl      2) once the whole package has been installed, users should
 176 dnl         link using -lfoo.
 177 dnl   Normally, we only care about the first case, but since the
 178 dnl   guile-config script needs to give users all the flags they need
 179 dnl   to link programs against guile, the GUILE_WITH_THREADS macro
 180 dnl   needs to supply the second piece of information as well.
 181 dnl
 182 dnl   This whole thing is a little confused about what ought to be
 183 dnl   done in the top-level configure script, and what ought to be
 184 dnl   taken care of in the subdirectory.  For example, qtmds_s and
 185 dnl   friends really ought not to be even mentioned in the top-level
 186 dnl   configure script, but here they are.
 187
 188 AC_DEFUN([QTHREADS_CONFIGURE],[
 189   AC_REQUIRE([AC_PROG_LN_S])
 190
 191   AC_MSG_CHECKING(QuickThreads configuration)
 192   # How can we refer to the qt source directory from within the qt build
 193   # directory?  For headers, we can rely on the fact that the qt src
 194   # directory appears in the #include path.
 195   qtsrcdir="`(cd $srcdir; pwd)`/qt"
 196
 197   changequote(,)dnl We use [ and ] in a regexp in the case
 198
 199   THREAD_PACKAGE=QT
 200   qthread_asflags=''
 201   case "$host" in
 202     i[3456]86-*-*)
 203       port_name=i386
 204       qtmd_h=md/i386.h
 205       qtmds_s=md/i386.s
 206       qtmdc_c=md/null.c
 207       qtdmdb_s=
 208       case "$host" in
 209         *-*-netbsd* )
 210           ## NetBSD needs to be told to pass the assembly code through
 211           ## the C preprocessor.  Other GCC installations seem to do
 212           ## this by default, but NetBSD's doesn't.  We could get the
 213           ## same effect by giving the file a name ending with .S
 214           ## instead of .s, but I don't see how to tell automake to do
 215           ## that.
 216           qthread_asflags='-x assembler-with-cpp'
 217         ;;
 218       esac
 219       ;;
 220     mips-sgi-irix[56]*)
 221       port_name=irix
 222       qtmd_h=md/mips.h
 223       qtmds_s=md/mips-irix5.s
 224       qtmdc_c=md/null.c
 225       qtdmdb_s=md/mips_b.s
 226       ;;
 227     mips-*-*)
 228       port_name=mips
 229       qtmd_h=md/mips.h
 230       qtmds_s=md/mips.s
 231       qtmdc_c=md/null.c
 232       qtdmdb_s=md/mips_b.s
 233       ;;
 234     sparc-*-sunos*)
 235       port_name=sparc-sunos
 236       qtmd_h=md/sparc.h
 237       qtmds_s=md/_sparc.s
 238       qtmdc_c=md/null.c
 239       qtdmdb_s=md/_sparc_b.s
 240       ;;
 241     sparc-*-*)
 242       port_name=sparc
 243       qtmd_h=md/sparc.h
 244       qtmds_s=md/sparc.s
 245       qtmdc_c=md/null.c
 246       qtdmdb_s=md/sparc_b.s
 247       ;;
 248     alpha*-*-*)
 249       port_name=alpha
 250       qtmd_h=md/axp.h
 251       qtmds_s=md/axp.s
 252       qtmdc_c=md/null.c
 253       qtdmdb_s=md/axp_b.s
 254       ;;
 255     *)
 256       echo "Unknown configuration; threads package disabled"
 257       THREAD_PACKAGE=""
 258       ;;
 259   esac
 260   changequote([, ])
 261
 262   # Did configuration succeed?
 263   if test -n "$THREAD_PACKAGE"; then
 264     AC_MSG_RESULT($port_name)
 265     QTHREAD_LTLIBS=libqthreads.la
 266     THREAD_CPPFLAGS="-I$qtsrcdir -I../qt"
 267     THREAD_LIBS_LOCAL="../qt/libqthreads.la"
 268     THREAD_LIBS_INSTALLED="-lqthreads"
 269   else
 270     AC_MSG_RESULT(none; disabled)
 271   fi
 272
 273   AC_SUBST(QTHREAD_LTLIBS)
 274   AC_SUBST(qtmd_h)
 275   AC_SUBST(qtmds_s)
 276   AC_SUBST(qtmdc_c)
 277   AC_SUBST(qtdmdb_s)
 278   AC_SUBST(qthread_asflags)
 279   AC_SUBST(THREAD_PACKAGE)
 280   AC_SUBST(THREAD_CPPFLAGS)
 281   AC_SUBST(THREAD_LIBS_LOCAL)
 282   AC_SUBST(THREAD_LIBS_INSTALLED)
 283 ])