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 "$guile_cv_struct_utimbuf_needs_posix" = yes; then
  18      AC_DEFINE([UTIMBUF_NEEDS_POSIX], 1,
  19        [Define this if <utime.h> doesn't define struct utimbuf unless
  20         _POSIX_SOURCE is defined.  See GUILE_STRUCT_UTIMBUF in aclocal.m4.])
  21   fi])
  22
  23
  24
  25
  26 dnl
  27 dnl Apparently, at CMU they have a weird version of libc.h that is
  28 dnl installed in /usr/local/include and conflicts with unistd.h.
  29 dnl In these situations, we should not #include libc.h.
  30 dnl This test arranges to #define LIBC_H_WITH_UNISTD_H iff libc.h is
  31 dnl present on the system, and is safe to #include.
  32 dnl
  33 AC_DEFUN([GUILE_HEADER_LIBC_WITH_UNISTD],
  34   [
  35     AC_CHECK_HEADERS(libc.h unistd.h)
  36     AC_CACHE_CHECK(
  37       [whether libc.h and unistd.h can be included together],
  38       guile_cv_header_libc_with_unistd,
  39       [
  40         if test "$ac_cv_header_libc_h" = "no"; then
  41           guile_cv_header_libc_with_unistd="no"
  42         elif test "$ac_cv_header_unistd_h" = "no"; then
  43           guile_cv_header_libc_with_unistd="yes"
  44         else
  45           AC_TRY_COMPILE(
  46             [
  47 #             include <libc.h>
  48 #             include <unistd.h>
  49             ],
  50             [],
  51             [guile_cv_header_libc_with_unistd=yes],
  52             [guile_cv_header_libc_with_unistd=no]
  53           )
  54         fi
  55       ]
  56     )
  57     if test "$guile_cv_header_libc_with_unistd" = yes; then
  58       AC_DEFINE(LIBC_H_WITH_UNISTD_H, 1,
  59         [Define this if we should include <libc.h> when we've already
  60          included <unistd.h>.  On some systems, they conflict, and libc.h
  61          should be omitted.  See GUILE_HEADER_LIBC_WITH_UNISTD in
  62          aclocal.m4.])
  63     fi
  64   ]
  65 )
  66
  67
  68
  69 dnl This is needed when we want to check for the same function repeatedly
  70 dnl with other parameters, such as libraries, varying.
  71 dnl
  72 dnl GUILE_NAMED_CHECK_FUNC(FUNCTION, TESTNAME,
  73 dnl                        [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
  74 AC_DEFUN(GUILE_NAMED_CHECK_FUNC,
  75 [AC_MSG_CHECKING([for $1])
  76 AC_CACHE_VAL(ac_cv_func_$1_$2,
  77 [AC_TRY_LINK(
  78 dnl Don't include <ctype.h> because on OSF/1 3.0 it includes <sys/types.h>
  79 dnl which includes <sys/select.h> which contains a prototype for
  80 dnl select.  Similarly for bzero.
  81 [/* System header to define __stub macros and hopefully few prototypes,
  82     which can conflict with char $1(); below.  */
  83 #include <assert.h>
  84 /* Override any gcc2 internal prototype to avoid an error.  */
  85 #ifdef __cplusplus
  86 extern "C"
  87 #endif
  88 /* We use char because int might match the return type of a gcc2
  89     builtin and then its argument prototype would still apply.  */
  90 char $1();
  91 ], [
  92 /* The GNU C library defines this for functions which it implements
  93     to always fail with ENOSYS.  Some functions are actually named
  94     something starting with __ and the normal name is an alias.  */
  95 #if defined (__stub_$1) || defined (__stub___$1)
  96 choke me
  97 #else
  98 $1();
  99 #endif
 100 ], eval "ac_cv_func_$1_$2=yes", eval "ac_cv_func_$1_$2=no")])
 101 if eval "test \"`echo '$ac_cv_func_'$1'_'$2`\" = yes"; then
 102   AC_MSG_RESULT(yes)
 103   ifelse([$3], , :, [$3])
 104 else
 105   AC_MSG_RESULT(no)
 106 ifelse([$4], , , [$4
 107 ])dnl
 108 fi
 109 ])