From f2bfd33806f1339ecd16eb76b0146544b65dc68e Mon Sep 17 00:00:00 2001 From: Sergei Trofimovich Date: Fri, 4 Dec 2009 21:40:12 +0000 Subject: [PATCH] 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. --- configure.ac | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/configure.ac b/configure.ac index fa5f9a3..15b3c85 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 ################################################################ -- 1.7.10.4