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Check for gcc TI mode availablity

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Frank Denis 2013-03-17 18:40:14 -07:00
parent 289a75113c
commit 4395817042
1 changed files with 13 additions and 0 deletions
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13
configure.ac
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@ -148,6 +148,19 @@ dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_BIGENDIAN
AC_MSG_CHECKING(for 128-bit arithmetic)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <limits.h>
]], [[
typedef unsigned uint128_t __attribute__((mode(TI)));
uint128_t x;
(void) x;
return sizeof(x) / CHAR_BIT != 16U
]])],
[AC_MSG_RESULT(yes)
AC_DEFINE([HAVE_TI_MODE], [1], [gcc TI mode is available])],
[AC_MSG_RESULT(no)])
dnl Checks for functions and headers
AC_CHECK_FUNC(clock_gettime, , [AC_CHECK_LIB(rt, clock_gettime)])