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| author | enge <enge@211d60ee-9f03-0410-a15a-8952a2c7a4e4> | 2011-02-22 10:09:55 +0000 |
|---|---|---|
| committer | enge <enge@211d60ee-9f03-0410-a15a-8952a2c7a4e4> | 2011-02-22 10:09:55 +0000 |
| commit | 149205a442038420ebc84c0016b948b2ef4ca336 (patch) | |
| tree | fda7e228909929ebd9cc96eec29cabf6ffa0acc0 /configure.ac | |
| parent | 1eeb3d432190fa973860627e131ee0743a91a177 (diff) | |
| download | mpc-149205a442038420ebc84c0016b948b2ef4ca336.tar.gz | |
configure.ac: check whether libm is needed for creal and cimag
git-svn-id: svn://scm.gforge.inria.fr/svn/mpc/trunk@938 211d60ee-9f03-0410-a15a-8952a2c7a4e4
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/configure.ac b/configure.ac index ffbcfbc..375dd69 100644 --- a/configure.ac +++ b/configure.ac @@ -122,18 +122,35 @@ esac # Checks for header files. AC_HEADER_STDC AC_CHECK_HEADERS([complex.h locale.h inttypes.h stdint.h limits.h unistd.h sys/time.h]) +AC_HEADER_TIME # Checks for typedefs, structures, and compiler characteristics. AC_C_CONST AC_TYPE_SIZE_T -AC_HEADER_TIME # Checks for libraries. -AC_CHECK_LIB([m], [creal]) +AC_CHECK_HEADERS( + [complex.h], + [ + AC_MSG_CHECKING(whether creal and cimag can be used without libm) + AC_LINK_IFELSE( + [AC_LANG_PROGRAM( + [[#include <complex.h>]], + [[complex double x = 1.0 + 2.0 * I; return (creal (x) + cimag (x));]] + )], + [AC_MSG_RESULT([yes])], + [ + AC_MSG_RESULT([no]) + AC_CHECK_LIB([m], [creal]) + ] + ) + ] + ) AC_CHECK_LIB([gmp], [__gmpz_init], [LIBS="-lgmp $LIBS"], [AC_MSG_ERROR([libgmp not found or uses a different ABI.])]) + AC_MSG_CHECKING(for MPFR) LIBS="-lmpfr $LIBS" AC_LINK_IFELSE( |