From a8e73e8e617942cf2c25a6301415488c74b5662d Mon Sep 17 00:00:00 2001
From: Joel Rosdahl <joel@rosdahl.net>
Date: Sat, 21 May 2011 20:09:44 +0200
Subject: [PATCH] Only link with -lm if needed

Some systems don't have libm.
---
 Makefile.in  | 2 +-
 configure.ac | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/Makefile.in b/Makefile.in
index 0ce3cdf3b..e3f6e518b 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -16,7 +16,7 @@ LDFLAGS = @LDFLAGS@
 EXEEXT = @EXEEXT@
 RANLIB = @RANLIB@
 
-libs = @LIBS@ -lm -lz
+libs = @LIBS@ -lz
 
 base_sources = \
     ccache.c mdfour.c hash.c execute.c util.c args.c stats.c version.c \
diff --git a/configure.ac b/configure.ac
index ffc49f8e1..faf709060 100644
--- a/configure.ac
+++ b/configure.ac
@@ -65,6 +65,9 @@ HW_FUNC_SNPRINTF
 HW_FUNC_VASPRINTF
 HW_FUNC_ASPRINTF
 
+dnl Check if -lm is needed.
+AC_SEARCH_LIBS(cos, m)
+
 dnl Check for zlib.
 AC_CACHE_CHECK(
     [for zlib >= 1.2.3],
-- 
2.47.2