[yelp] Fix linking error for undefined reference to hypot

[David King <davidk src gnome org>]

commit 5182da8cf0322d0bec62febb2a25a05116a8d762
Author: Andreas Henriksson <andreas fatal se>
Date:   Thu Sep 24 10:04:39 2015 +0200

    Fix linking error for undefined reference to hypot
    
    https://bugzilla.gnome.org/show_bug.cgi?id=755489

 configure.ac        |    1 +
 libyelp/Makefile.am |    2 +-
 2 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index dba08f6..8869f9b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -25,6 +25,7 @@ AM_PATH_GLIB_2_0
 GLIB_GSETTINGS
 
 # Library dependecies
+LT_LIB_M
 PKG_CHECK_MODULES(YELP,
 [
        gio-2.0 >= 2.38.0
diff --git a/libyelp/Makefile.am b/libyelp/Makefile.am
index 73efd41..0959df9 100644
--- a/libyelp/Makefile.am
+++ b/libyelp/Makefile.am
@@ -18,7 +18,7 @@ libyelpcommon_la_CFLAGS =               \
        -DYELP_ICON_PATH=\"$(YELP_ICON_PATH)\"
 
 
-libyelpcommon_la_LIBADD = $(YELP_LIBS)
+libyelpcommon_la_LIBADD = $(YELP_LIBS) $(LIBM)
 libyelpcommon_la_LDFLAGS =     \
        -avoid-version          \
        -no-undefined