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| author | Alexey Kopytov <Alexey.Kopytov@sun.com> | 2009-03-25 15:48:29 +0300 |
|---|---|---|
| committer | Alexey Kopytov <Alexey.Kopytov@sun.com> | 2009-03-25 15:48:29 +0300 |
| commit | 38828c175744a9cbdf9aa82a4975162770130656 (patch) | |
| tree | 14174933b6b2a2738ea715fb4d699627731962c5 /configure.in | |
| parent | 724d3e8a0609930c060d1ebd206e5dda072ef9db (diff) | |
| parent | 73cb9b6e04a110c3fd71f68bcf3bc0cbfcc4f326 (diff) | |
| download | mariadb-git-38828c175744a9cbdf9aa82a4975162770130656.tar.gz | |
Manual merge.
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/configure.in b/configure.in index d86218bd782..ca8c0dc09b4 100644 --- a/configure.in +++ b/configure.in @@ -2085,6 +2085,27 @@ esac AC_MSG_CHECKING(for isinf in <math.h>) AC_TRY_LINK([#include <math.h>], [float f = 0.0; int r = isinf(f); return r], AC_MSG_RESULT(yes) + AC_MSG_CHECKING(whether isinf() is safe to use in C code) + AC_TRY_RUN([ +#include <math.h> +int main() +{ + double a= 10.0; + double b= 1e308; + + return !isinf(a * b); +} +], + [AC_MSG_RESULT(yes)], + [AC_MSG_RESULT(no) + AC_DEFINE([HAVE_BROKEN_ISINF], [1], + [Define to 1 if isinf() uses 80-bit register for intermediate values]) + ], + [ +# Let's be optimistic when cross-compiling, since the only compiler known +# to be affected by this isinf() bug is GCC 4.3 on 32-bit x86. + AC_MSG_RESULT([[cross-compiling, assuming 'yes']]) + ]) AC_MSG_CHECKING(whether isinf() can be used in C++ code) AC_LANG_SAVE AC_LANG_CPLUSPLUS |