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This commit is contained in:
Brian Fiete 2019-08-23 11:56:54 -07:00
parent c74712dad9
commit 078564ac9e
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24
BeefRT/gperftools/m4/compiler_characteristics.m4 Normal file
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# Check compiler characteristics (e.g. type sizes, PRIxx macros, ...)
# If types $1 and $2 are compatible, perform action $3
AC_DEFUN([AC_TYPES_COMPATIBLE],
[AC_TRY_COMPILE([#include <stddef.h>], [$1 v1 = 0; $2 v2 = 0; return (&v1 - &v2)], $3)])
define(AC_PRIUS_COMMENT, [printf format code for printing a size_t and ssize_t])
AC_DEFUN([AC_COMPILER_CHARACTERISTICS],
[AC_CACHE_CHECK(AC_PRIUS_COMMENT, ac_cv_formatting_prius_prefix,
[AC_TYPES_COMPATIBLE(unsigned int, size_t,
ac_cv_formatting_prius_prefix=; ac_cv_prius_defined=1)
AC_TYPES_COMPATIBLE(unsigned long, size_t,
ac_cv_formatting_prius_prefix=l; ac_cv_prius_defined=1)
AC_TYPES_COMPATIBLE(unsigned long long, size_t,
ac_cv_formatting_prius_prefix=ll; ac_cv_prius_defined=1
)])
if test -z "$ac_cv_prius_defined"; then
ac_cv_formatting_prius_prefix=z;
fi
AC_DEFINE_UNQUOTED(PRIuS, "${ac_cv_formatting_prius_prefix}u", AC_PRIUS_COMMENT)
AC_DEFINE_UNQUOTED(PRIxS, "${ac_cv_formatting_prius_prefix}x", AC_PRIUS_COMMENT)
AC_DEFINE_UNQUOTED(PRIdS, "${ac_cv_formatting_prius_prefix}d", AC_PRIUS_COMMENT)
])