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Diffstat (limited to 'acinclude.m4')
| -rw-r--r-- | acinclude.m4 | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/acinclude.m4 b/acinclude.m4 index 102f869e0d4..0337b9de0cd 100644 --- a/acinclude.m4 +++ b/acinclude.m4 @@ -1835,6 +1835,30 @@ dnl END OF MYSQL_CHECK_NDBCLUSTER SECTION dnl --------------------------------------------------------------------------- +dnl +dnl Macro to check time_t range: according to C standard +dnl array index myst be greater then 0 => if time_t is signed +dnl the code in the macros below won't compile. +dnl + +AC_DEFUN([MYSQL_CHECK_TIME_T],[ + AC_MSG_CHECKING(if time_t is unsigned) + AC_COMPILE_IFELSE([AC_LANG_PROGRAM( + [[ +#include <time.h> + ]], + [[ + int array[(((time_t)-1) > 0) ? 1 : -1]; + ]] ) + ], [ + AC_DEFINE([TIME_T_UNSIGNED], 1, [Define to 1 if time_t is unsigned]) + AC_MSG_RESULT(yes) + ], + [AC_MSG_RESULT(no)] + ) +]) + + dnl By default, many hosts won't let programs access large files; dnl one must use special compiler options to get large-file access to work. dnl For more details about this brain damage please see: |