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1.4 KiB

dnl ICP_CHECK_NOTCH_FUNCS
dnl Check for various functions that may not be present
dnl everywhere, and for which we provide a replacement.
dnl
AC_DEFUN([ICP_CHECK_NOTCH_FUNCS],[
AC_CHECK_HEADERS([err.h], [], [AC_CONFIG_LINKS([err.h:lib/err.compat.h])])
AC_REPLACE_FUNCS([asprintf err])
AC_CHECK_DECLS([program_invocation_short_name], [],
[AC_CHECK_FUNCS([getprogname setprogname], [],
[AC_LIBOBJ([progname])])],
[#include <errno.h>
])
AH_BOTTOM([#include <compat.h>
])
])
dnl ICP_CHECK_SANE_REALPATH([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
dnl Check for the realpath function. If it is available, then
dnl check if it is safely usable.
dnl
AC_DEFUN([ICP_CHECK_SANE_REALPATH],[
AC_CHECK_FUNCS([realpath])
if test "x$ac_cv_func_realpath" = xyes ; then
AC_MSG_CHECKING([whether realpath is POSIX.1-2008 compliant])
AC_RUN_IFELSE(
[AC_LANG_PROGRAM(
[[#include <stdlib.h>]],
[[
char *p = NULL;
p = realpath("/tmp", NULL);
if ( p == NULL )
return 1;
else
free(p);
]])],
[AC_MSG_RESULT([yes])
m4_default([$1], [AC_DEFINE([HAVE_SANE_REALPATH], [1],
[Define to 1 if realpath is POSIX.1-2008 compliant.])])],
[AC_MSG_RESULT([no])
$2],
[AC_MSG_RESULT([cross-compiling, assuming no])
$2])
else
m4_default([$2], [:])
fi
])