Only link with -lm if needed

Some systems don't have libm.

diff --git a/Makefile.in b/Makefile.in
index 0ce3cdf3b18ba1709a9ebcb3059ccaa51274a8f5..e3f6e518b8349db907f7640cdecba2dfd8da9f08 100644 (file)
--- 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 ffc49f8e1b1583d37e9d05e6eb5bc15abae4d78d..faf7090603fbdd907147c76ee436fbdce35fa1ce 100644 (file)
--- 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],