-# calloc.m4 serial 9
+# calloc.m4 serial 18
-# Copyright (C) 2004-2009 Free Software Foundation, Inc.
+# Copyright (C) 2004-2018 Free Software Foundation, Inc.
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.
# _AC_FUNC_CALLOC_IF([IF-WORKS], [IF-NOT])
# -------------------------------------
-# If `calloc (0, 0)' is properly handled, run IF-WORKS, otherwise, IF-NOT.
+# If 'calloc (0, 0)' is properly handled, run IF-WORKS, otherwise, IF-NOT.
AC_DEFUN([_AC_FUNC_CALLOC_IF],
-[AC_REQUIRE([AC_TYPE_SIZE_T])dnl
-AC_CACHE_CHECK([for GNU libc compatible calloc], [ac_cv_func_calloc_0_nonnull],
-[AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
- [[exit (!calloc (0, 0) || calloc ((size_t) -1 / 8 + 1, 8));]])],
- [ac_cv_func_calloc_0_nonnull=yes],
- [ac_cv_func_calloc_0_nonnull=no],
- [ac_cv_func_calloc_0_nonnull=no])])
-AS_IF([test $ac_cv_func_calloc_0_nonnull = yes], [$1], [$2])
+[
+ AC_REQUIRE([AC_TYPE_SIZE_T])dnl
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+ AC_CACHE_CHECK([for GNU libc compatible calloc],
+ [ac_cv_func_calloc_0_nonnull],
+ [AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM(
+ [AC_INCLUDES_DEFAULT],
+ [[int result = 0;
+ char *p = calloc (0, 0);
+ if (!p)
+ result |= 1;
+ free (p);
+ p = calloc ((size_t) -1 / 8 + 1, 8);
+ if (p)
+ result |= 2;
+ free (p);
+ return result;
+ ]])],
+ [ac_cv_func_calloc_0_nonnull=yes],
+ [ac_cv_func_calloc_0_nonnull=no],
+ [case "$host_os" in
+ # Guess yes on glibc systems.
+ *-gnu* | gnu*) ac_cv_func_calloc_0_nonnull="guessing yes" ;;
+ # Guess yes on native Windows.
+ mingw*) ac_cv_func_calloc_0_nonnull="guessing yes" ;;
+ # If we don't know, assume the worst.
+ *) ac_cv_func_calloc_0_nonnull="guessing no" ;;
+ esac
+ ])])
+ case "$ac_cv_func_calloc_0_nonnull" in
+ *yes)
+ $1
+ ;;
+ *)
+ $2
+ ;;
+ esac
])# AC_FUNC_CALLOC
-# AC_FUNC_CALLOC
-# ---------------
-# Report whether `calloc (0, 0)' is properly handled, and replace calloc if
+# gl_FUNC_CALLOC_GNU
+# ------------------
+# Report whether 'calloc (0, 0)' is properly handled, and replace calloc if
# needed.
-AC_DEFUN([AC_FUNC_CALLOC],
-[_AC_FUNC_CALLOC_IF(
- [AC_DEFINE([HAVE_CALLOC], [1],
- [Define to 1 if your system has a GNU libc compatible `calloc'
- function, and to 0 otherwise.])],
- [AC_DEFINE([HAVE_CALLOC], [0])
- AC_LIBOBJ([calloc])
- AC_DEFINE([calloc], [rpl_calloc],
- [Define to rpl_calloc if the replacement function should be used.])])
-])# AC_FUNC_CALLOC
+AC_DEFUN([gl_FUNC_CALLOC_GNU],
+[
+ AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+ _AC_FUNC_CALLOC_IF(
+ [AC_DEFINE([HAVE_CALLOC_GNU], [1],
+ [Define to 1 if your system has a GNU libc compatible 'calloc'
+ function, and to 0 otherwise.])],
+ [AC_DEFINE([HAVE_CALLOC_GNU], [0])
+ REPLACE_CALLOC=1
+ ])
+])# gl_FUNC_CALLOC_GNU
# gl_FUNC_CALLOC_POSIX
# fails), and replace calloc if it is not.
AC_DEFUN([gl_FUNC_CALLOC_POSIX],
[
+ AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
AC_REQUIRE([gl_CHECK_MALLOC_POSIX])
if test $gl_cv_func_malloc_posix = yes; then
- HAVE_CALLOC_POSIX=1
AC_DEFINE([HAVE_CALLOC_POSIX], [1],
[Define if the 'calloc' function is POSIX compliant.])
else
- AC_LIBOBJ([calloc])
- HAVE_CALLOC_POSIX=0
+ REPLACE_CALLOC=1
fi
- AC_SUBST([HAVE_CALLOC_POSIX])
])