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| author | enge <enge@211d60ee-9f03-0410-a15a-8952a2c7a4e4> | 2011-07-13 12:13:04 +0000 |
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| committer | enge <enge@211d60ee-9f03-0410-a15a-8952a2c7a4e4> | 2011-07-13 12:13:04 +0000 |
| commit | 3fe7c2612c5f6a3c5cb7b20f4b020ab52da6c598 (patch) | |
| tree | 3e8bee7d77bd7883b289e82fced9764709768c37 /m4 | |
| parent | c10f39f9a49de2630a535cb56327b259563cb864 (diff) | |
| download | mpc-3fe7c2612c5f6a3c5cb7b20f4b020ab52da6c598.tar.gz | |
configure.ac, mpc.m4: to test for complex.h, always compile a test programme
closes bug #12829
git-svn-id: svn://scm.gforge.inria.fr/svn/mpc/trunk@1013 211d60ee-9f03-0410-a15a-8952a2c7a4e4
Diffstat (limited to 'm4')
| -rw-r--r-- | m4/mpc.m4 | 60 |
1 files changed, 60 insertions, 0 deletions
@@ -19,6 +19,66 @@ along with the MPC Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +# +# SYNOPSIS +# +# +MPC_COMPLEX_H +# +# DESCRIPTION +# +# Check whether complex.h is usable; if yes, define HAVE_COMPLEX_H. +# On solaris, one also needs the libm; in that case, it is added to LIB, +# and HAVE_LIBM is defined. +# +AC_DEFUN([MPC_COMPLEX_H], [ + AC_CHECK_HEADER( + [complex.h], + [ + m4_define( + [MPC_CONFTEST], + [ + AC_LANG_PROGRAM( + [[#include <complex.h>]], + [[complex double x = 1.0 + 2.0 * I; return (creal (x) + cimag (x));]] + ) + ] + ) + + AC_MSG_CHECKING(whether creal and cimag can be used without libm) + AC_LINK_IFELSE( + [MPC_CONFTEST], + [ + AC_MSG_RESULT([yes]) + AC_DEFINE([HAVE_COMPLEX_H], [1], [complex.h present and usable]) + ], + [ + AC_MSG_RESULT([no]) + AC_CHECK_LIB([m], [creal], + [ + AC_MSG_CHECKING(whether creal and cimag can be used with libm) + AC_LINK_IFELSE( + [MPC_CONFTEST], + [ + AC_MSG_RESULT([yes]) + LIBS="-lm $LIBS" + AC_DEFINE([HAVE_LIBM], [1], [libm needed for creal]) + AC_DEFINE([HAVE_COMPLEX_H], [1], [complex.h present and usable]) + ], + [ + AC_MSG_RESULT([no]) + ] + ) + ] + ) + ] + ) + ] + ) +]) + + # # SYNOPSIS # |