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dnl On the NeXT, #including <utime.h> doesn't give you a definition for
dnl struct utime, unless you #define _POSIX_SOURCE.
AC_DEFUN(GUILE_STRUCT_UTIMBUF, [
AC_CACHE_CHECK([whether we need POSIX to get struct utimbuf],
guile_cv_struct_utimbuf_needs_posix,
[AC_TRY_CPP([
#ifdef __EMX__
#include <sys/utime.h>
#else
#include <utime.h>
#endif
struct utime blah;
],
guile_cv_struct_utimbuf_needs_posix=no,
guile_cv_struct_utimbuf_needs_posix=yes)])
if test "$guile_cv_struct_utimbuf_needs_posix" = yes; then
AC_DEFINE(UTIMBUF_NEEDS_POSIX)
fi])
dnl
dnl Apparently, at CMU they have a weird version of libc.h that is
dnl installed in /usr/local/include and conflicts with unistd.h.
dnl In these situations, we should not #include libc.h.
dnl This test arranges to #define LIBC_H_WITH_UNISTD_H iff libc.h is
dnl present on the system, and is safe to #include.
dnl
AC_DEFUN([GUILE_HEADER_LIBC_WITH_UNISTD],
[
AC_CHECK_HEADERS(libc.h unistd.h)
AC_CACHE_CHECK(
"whether libc.h and unistd.h can be included together",
guile_cv_header_libc_with_unistd,
[
if test "$ac_cv_header_libc_h" = "no"; then
guile_cv_header_libc_with_unistd="no"
elif test "$ac_cv_header_unistd.h" = "no"; then
guile_cv_header_libc_with_unistd="yes"
else
AC_TRY_COMPILE(
[
# include <libc.h>
# include <unistd.h>
],
[],
[guile_cv_header_libc_with_unistd=yes],
[guile_cv_header_libc_with_unistd=no]
)
fi
]
)
if test "$guile_cv_header_libc_with_unistd" = yes; then
AC_DEFINE(LIBC_H_WITH_UNISTD_H)
fi
]
)
dnl This is needed when we want to check for the same function repeatedly
dnl with other parameters, such as libraries, varying.
dnl
dnl GUILE_NAMED_CHECK_FUNC(FUNCTION, TESTNAME,
dnl [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
AC_DEFUN(GUILE_NAMED_CHECK_FUNC,
[AC_MSG_CHECKING([for $1])
AC_CACHE_VAL(ac_cv_func_$1_$2,
[AC_TRY_LINK(
dnl Don't include <ctype.h> because on OSF/1 3.0 it includes <sys/types.h>
dnl which includes <sys/select.h> which contains a prototype for
dnl select. Similarly for bzero.
[/* System header to define __stub macros and hopefully few prototypes,
which can conflict with char $1(); below. */
#include <assert.h>
/* Override any gcc2 internal prototype to avoid an error. */
]ifelse(AC_LANG, CPLUSPLUS, [#ifdef __cplusplus
extern "C"
#endif
])dnl
[/* We use char because int might match the return type of a gcc2
builtin and then its argument prototype would still apply. */
char $1();
], [
/* The GNU C library defines this for functions which it implements
to always fail with ENOSYS. Some functions are actually named
something starting with __ and the normal name is an alias. */
#if defined (__stub_$1) || defined (__stub___$1)
choke me
#else
$1();
#endif
], eval "ac_cv_func_$1_$2=yes", eval "ac_cv_func_$1_$2=no")])
if eval "test \"`echo '$ac_cv_func_'$1'_'$2`\" = yes"; then
AC_MSG_RESULT(yes)
ifelse([$3], , :, [$3])
else
AC_MSG_RESULT(no)
ifelse([$4], , , [$4
])dnl
fi
])
dnl Check checks whether dlsym (if present) requires a leading underscore.
dnl Written by Dan Hagerty <hag@ai.mit.edu> for scsh-0.5.0.
AC_DEFUN(GUILE_DLSYM_USCORE, [
AC_MSG_CHECKING(for underscore before symbols)
AC_CACHE_VAL(guile_cv_uscore,[
echo "main(){int i=1;}
fnord(){int i=23; int ltuae=42;}" > conftest.c
${CC} conftest.c > /dev/null
if (nm a.out | grep _fnord) > /dev/null; then
guile_cv_uscore=yes
else
guile_cv_uscore=no
fi])
AC_MSG_RESULT($guile_cv_uscore)
rm -f conftest.c a.out
if test $guile_cv_uscore = yes; then
AC_DEFINE(USCORE)
if test $ac_cv_func_dlopen = yes -o $ac_cv_lib_dl_dlopen = yes ; then
AC_MSG_CHECKING(whether dlsym always adds an underscore for us)
AC_CACHE_VAL(guile_cv_dlsym_adds_uscore,AC_TRY_RUN( [
#include <dlfcn.h>
#include <stdio.h>
fnord() { int i=42;}
main() { void *self, *ptr1, *ptr2; self=dlopen(NULL,RTLD_LAZY);
if(self) { ptr1=dlsym(self,"fnord"); ptr2=dlsym(self,"_fnord");
if(ptr1 && !ptr2) exit(0); } exit(1); }
], [guile_cv_dlsym_adds_uscore=yes
AC_DEFINE(DLSYM_ADDS_USCORE) ], guile_cv_dlsym_adds_uscore=no,
guile_cv_dlsym_adds_uscore=no))
AC_MSG_RESULT($guile_cv_dlsym_adds_uscore)
fi
fi
])
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