[libgnomeui] Explicitly link against libm for floor()

[Michael Biebl <mbiebl src gnome org>]

commit 072a838e69c349fcf6180f26745e738bc94d4026
Author: Michael Biebl <biebl debian org>
Date:   Mon Sep 5 03:39:14 2011 +0200

    Explicitly link against libm for floor()
    
    http://mail.gnome.org/archives/desktop-devel-list/2011-August/msg00237.html

 configure.in           |    4 ++++
 libgnomeui/Makefile.am |    3 ++-
 2 files changed, 6 insertions(+), 1 deletions(-)
---
diff --git a/configure.in b/configure.in
index 3c4724e..2328cb4 100644
--- a/configure.in
+++ b/configure.in
@@ -77,6 +77,10 @@ AC_STDC_HEADERS
 AC_LIBTOOL_WIN32_DLL
 AM_PROG_LIBTOOL
 
+dnl check for libm, for floor()
+LT_LIB_M
+AC_SUBST(LIBM)
+
 dnl
 dnl Check for -lX11 (for XUngrabServer in gnome-ui-init.c) and set
 dnl X11_CFLAGS and X11_LIBS
diff --git a/libgnomeui/Makefile.am b/libgnomeui/Makefile.am
index 57db5e2..d5338fe 100644
--- a/libgnomeui/Makefile.am
+++ b/libgnomeui/Makefile.am
@@ -249,7 +249,8 @@ libgnomeui_2_la_LDFLAGS = \
 libgnomeui_2_la_LIBADD = \
 	$(LIBGNOMEUI_LIBS)			\
 	$(SM_LIBS)				\
-	$(X11_LIBS)
+	$(X11_LIBS)				\
+	$(LIBM)
 
 LDADD = \
 	libgnomeui-2.la $(LIBGNOMEUI_LIBS)