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author | Sergei Trofimovich <slyfox@inbox.ru> | 2009-12-04 21:40:12 +0000 |
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committer | Sergei Trofimovich <slyfox@inbox.ru> | 2009-12-04 21:40:12 +0000 |
commit | f2bfd33806f1339ecd16eb76b0146544b65dc68e (patch) | |
tree | 65a9c3ea403ad7236f574de68ce0d00dad6f6e72 /configure.ac | |
parent | aeeeda3efad5266b0c52b92807bb0cc3b3f23b5c (diff) | |
download | haskell-f2bfd33806f1339ecd16eb76b0146544b65dc68e.tar.gz |
configure.ac: fix libm checks (Trac #3730)
libbfd pulled libm as dependency and broke LIBM= detection.
Patch moves libm in library tests as early as possible.
Thanks to asuffield for suggesting such a simple fix.
Thanks to Roie Kerstein and Renato Gallo for finding
and tracking down the issue.
Diffstat (limited to 'configure.ac')
-rw-r--r-- | configure.ac | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/configure.ac b/configure.ac index fa5f9a38e4..15b3c8547a 100644 --- a/configure.ac +++ b/configure.ac @@ -723,18 +723,22 @@ if test $HaveLibMingwEx = YES ; then AC_DEFINE([HAVE_MINGWEX], [1], [Define to 1 if you have the mingwex library.]) fi -dnl ** check whether this machine has BFD and liberty installed (used for debugging) -dnl the order of these tests matters: bfd needs liberty -AC_CHECK_LIB(iberty, xmalloc) -AC_CHECK_LIB(bfd, bfd_init) - dnl ** check for math library +dnl Keep that check as early as possible. +dnl as we need to know whether we need libm +dnl for math functions or not +dnl (see http://hackage.haskell.org/trac/ghc/ticket/3730) AC_CHECK_FUNC(atan,[fp_libm_not_needed=yes;LIBM=],[fp_libm_not_needed=dunno]) if test x"$fp_libm_not_needed" = xdunno; then AC_CHECK_LIB([m], [atan], [LIBS="-lm $LIBS"; LIBM="-lm"],[LIBM=]) fi AC_SUBST([LIBM]) +dnl ** check whether this machine has BFD and liberty installed (used for debugging) +dnl the order of these tests matters: bfd needs liberty +AC_CHECK_LIB(iberty, xmalloc) +AC_CHECK_LIB(bfd, bfd_init) + dnl ################################################################ dnl Check for libraries dnl ################################################################ |