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| author | Mark Dickinson <dickinsm@gmail.com> | 2008-04-22 00:54:27 (GMT) |
|---|---|---|
| committer | Mark Dickinson <dickinsm@gmail.com> | 2008-04-22 00:54:27 (GMT) |
| commit | 7a3d8641a97fb852198c445ff18b6ee29fd01a51 (patch) | |
| tree | 4935f9e1912499887902dd86838b6aa7959b65ac /configure.in | |
| parent | 60ffcbe88bf7552667a6f8693f4bc3e38ed625f8 (diff) | |
| download | cpython-7a3d8641a97fb852198c445ff18b6ee29fd01a51.zip cpython-7a3d8641a97fb852198c445ff18b6ee29fd01a51.tar.gz cpython-7a3d8641a97fb852198c445ff18b6ee29fd01a51.tar.bz2 | |
Make configure test for tanh(-0.) == -0. committed in r62447 actually
work. (The test wasn't properly linked with libm. Sigh.)
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/configure.in b/configure.in index 4d72321..a246b2d 100644 --- a/configure.in +++ b/configure.in @@ -2995,12 +2995,16 @@ fi], # * Check for mathematical functions * # ************************************ +LIBS_SAVE=$LIBS +LIBS="$LIBS $LIBM" + # On FreeBSD 6.2, it appears that tanh(-0.) returns 0. instead of # -0. on some architectures. AC_MSG_CHECKING(whether tanh preserves the sign of zero) AC_CACHE_VAL(ac_cv_tanh_preserves_zero_sign, [ AC_TRY_RUN([ #include <math.h> +#include <stdlib.h> int main() { /* return 0 if either negative zeros don't exist on this platform or if negative zeros exist @@ -3020,8 +3024,6 @@ then [Define if tanh(-0.) is -0., or if platform doesn't have signed zeros]) fi -LIBS_SAVE=$LIBS -LIBS="$LIBS $LIBM" AC_REPLACE_FUNCS(hypot) AC_CHECK_FUNCS(acosh asinh atanh copysign expm1 finite isinf isnan log1p) |