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| author | Charles Karney <charles@karney.com> | 2018-03-17 18:32:26 -0400 |
|---|---|---|
| committer | Charles Karney <charles@karney.com> | 2018-03-17 18:32:26 -0400 |
| commit | ca880f497aa9eeff9eccea7ab0168a4fed73d411 (patch) | |
| tree | ab83bd97591e637c394bbffa889b6231f111ba31 /configure.ac | |
| parent | db3e0ae30446498cec7e7f931d9be2ed65547691 (diff) | |
| download | PROJ-ca880f497aa9eeff9eccea7ab0168a4fed73d411.tar.gz PROJ-ca880f497aa9eeff9eccea7ab0168a4fed73d411.zip | |
Patch 1.49.3 for geodesic package.
Set flags for Intel compiler to prevent incorrect optimization of
arithmetic expressions #826. Guard against nans in sincosdx #834.
Issue #831 is not addressed here (need more information...).
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 898d8b3b..9e4fa3d3 100644 --- a/configure.ac +++ b/configure.ac @@ -29,6 +29,12 @@ CFLAGS="$save_CFLAGS" dnl We check for headers AC_HEADER_STDC +dnl Check flag for accurate arithmetic with Intel compiler. This is +dnl needed to stop the compiler from ignoring parentheses in expressions +dnl like (a + b) + c and from simplifying 0.0 + x to x (which is wrong if +dnl x = -0.0). +AX_CHECK_COMPILE_FLAG([-Werror -fprotect-parens -fsigned-zeros], + [CFLAGS="$CFLAGS -fprotect-parens -fsigned-zeros"]) dnl Check for C99 math functions save_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS -Wall -Werror" |