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# _AC_FUNC_CALLOC_IF([IF-WORKS], [IF-NOT])
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# -------------------------------------
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# If `calloc (0, 0)' is properly handled, run IF-WORKS, otherwise, IF-NOT.
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# If 'calloc (0, 0)' is properly handled, run IF-WORKS, otherwise, IF-NOT.
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AC_DEFUN([_AC_FUNC_CALLOC_IF],
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[AC_REQUIRE([AC_TYPE_SIZE_T])dnl
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AC_CACHE_CHECK([for GNU libc compatible calloc], [ac_cv_func_calloc_0_nonnull],
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[AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
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[[exit (!calloc (0, 0) || calloc ((size_t) -1 / 8 + 1, 8));]])],
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[ac_cv_func_calloc_0_nonnull=yes],
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[ac_cv_func_calloc_0_nonnull=no],
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[ac_cv_func_calloc_0_nonnull=no])])
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AS_IF([test $ac_cv_func_calloc_0_nonnull = yes], [$1], [$2])
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AC_REQUIRE([AC_TYPE_SIZE_T])dnl
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AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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AC_CACHE_CHECK([for GNU libc compatible calloc],
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[ac_cv_func_calloc_0_nonnull],
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[AC_INCLUDES_DEFAULT],
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if (calloc ((size_t) -1 / 8 + 1, 8))
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[ac_cv_func_calloc_0_nonnull=yes],
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[ac_cv_func_calloc_0_nonnull=no],
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# Guess yes on glibc systems.
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*-gnu*) ac_cv_func_calloc_0_nonnull="guessing yes" ;;
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# If we don't know, assume the worst.
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*) ac_cv_func_calloc_0_nonnull="guessing no" ;;
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case "$ac_cv_func_calloc_0_nonnull" in
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# Report whether `calloc (0, 0)' is properly handled, and replace calloc if
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# Report whether 'calloc (0, 0)' is properly handled, and replace calloc if
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AC_DEFUN([AC_FUNC_CALLOC],
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[AC_DEFINE([HAVE_CALLOC], [1],
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[Define to 1 if your system has a GNU libc compatible `calloc'
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function, and to 0 otherwise.])],
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[AC_DEFINE([HAVE_CALLOC], [0])
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AC_DEFINE([calloc], [rpl_calloc],
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[Define to rpl_calloc if the replacement function should be used.])])
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AC_DEFUN([gl_FUNC_CALLOC_GNU],
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AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
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[AC_DEFINE([HAVE_CALLOC_GNU], [1],
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[Define to 1 if your system has a GNU libc compatible 'calloc'
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function, and to 0 otherwise.])],
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[AC_DEFINE([HAVE_CALLOC_GNU], [0])
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])# gl_FUNC_CALLOC_GNU
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# gl_FUNC_CALLOC_POSIX
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# fails), and replace calloc if it is not.
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AC_DEFUN([gl_FUNC_CALLOC_POSIX],
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AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
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AC_REQUIRE([gl_CHECK_MALLOC_POSIX])
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if test $gl_cv_func_malloc_posix = yes; then
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AC_DEFINE([HAVE_CALLOC_POSIX], [1],
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[Define if the 'calloc' function is POSIX compliant.])
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AC_SUBST([HAVE_CALLOC_POSIX])