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| author | Siarhei Siamashka <siarhei.siamashka@gmail.com> | 2012-12-12 02:41:55 +0200 |
|---|---|---|
| committer | Siarhei Siamashka <siarhei.siamashka@gmail.com> | 2012-12-15 08:08:26 +0200 |
| commit | 83e5b874eb8808a05c3096187a65829be1417768 (patch) | |
| tree | ff87f1668fe2a058aa210a35fc987bf41a5036a4 | |
| parent | ad9968bd6f7537b85bf35f62d5891f29788a3771 (diff) | |
configure.ac: Added detection for __float128 support
GCC supports 128-bit floating point data type on some platforms (including
but not limited to x86 and x86-64). This may be useful for tests, which
need prefectly accurate reference implementations of certain algorithms.
| -rw-r--r-- | configure.ac | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 81f068d..529ed0a 100644 --- a/configure.ac +++ b/configure.ac @@ -968,6 +968,22 @@ fi AC_MSG_RESULT($support_for_attribute_constructor) AC_SUBST(TOOLCHAIN_SUPPORTS_ATTRIBUTE_CONSTRUCTOR) +dnl ===================================== +dnl __float128 + +support_for_float128=no + +AC_MSG_CHECKING(for __float128) +AC_LINK_IFELSE([AC_LANG_SOURCE([[ +__float128 a = 1.0Q, b = 2.0Q; int main (void) { return a + b; } +]])], support_for_float128=yes) + +if test x$support_for_float128 = xyes; then + AC_DEFINE([HAVE_FLOAT128], [], [Whether the tool chain supports __float128]) +fi + +AC_MSG_RESULT($support_for_float128) + dnl ================== dnl libpng |