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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> | 2013-01-27 20:50:26 +0200 |
| commit | 09600ae7e34eb777471c931cd4c3a8cdbda6e84a (patch) | |
| tree | b8b1f36585c73e863f2e4554d84987a347dc92d7 | |
| parent | c3deb8334a71998b986a7b8d5b74bedf26cc23aa (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 515e312..a93e290 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 |