[goobox] explicitly link to the math library

[Paolo Bacchilega <paobac src gnome org>]

commit 8e281ef84b6bbd8a4af3f957d7fa585cf947ab3d
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Thu Mar 29 23:25:34 2012 +0200

    explicitly link to the math library

 configure.ac    |   10 ++++++++++
 src/Makefile.am |    1 +
 2 files changed, 11 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 5242bad..ecf188a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -59,6 +59,16 @@ if test x$enable_run_in_place = xyes; then
 fi
 
 dnl ===========================================================================
+
+SAVE_CFLAGS="$CFLAGS"
+CFLAGS=""
+AC_CHECK_LIB(m, floor,, AC_MSG_ERROR([math library not found]))
+M_LIBS="-lm"
+CFLAGS="$SAVE_CFLAGS"
+unset SAVE_CFLAGS
+AC_SUBST(M_LIBS)
+
+dnl ===========================================================================
 dnl
 dnl libnotify
 dnl
diff --git a/src/Makefile.am b/src/Makefile.am
index df9a0ba..bf6f75e 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -87,6 +87,7 @@ goo-marshal.c: goo-marshal.list $(GLIB_GENMARSHAL)
 goobox_LDADD = 				\
 	$(top_builddir)/copy-n-paste/libeggsmclient.la  \
 	$(GOO_LIBS) 			\
+	$(M_LIBS)			\
 	$(LIBNOTIFY_LIBS)		\
 	$(SYSTEM_LIBS)