Explicitly link gdk and gtk against libm

We used to get an implicit -lm from gdk-pixbuf, but that has
recently been changed to not inject extraneous libraries into
link lines, so we have to do it ourselves now. This is more
correct, anyway.

diff --git a/configure.ac b/configure.ac
index 16f065efff3f40413b456c3b1113516926a4542b..3e973d7dc0e9b9d43f710b1682d66e571bef9d09 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -1263,7 +1263,7 @@ LDFLAGS="$saved_ldflags"
 
 GDK_PACKAGES="$PANGO_PACKAGES $GIO_PACKAGE $X_PACKAGES $WAYLAND_PACKAGES gdk-pixbuf-2.0 $cairo_backends cairo-gobject"
 
-GDK_DEP_LIBS="$GDK_EXTRA_LIBS `$PKG_CONFIG --libs $GDK_PACKAGES`"
+GDK_DEP_LIBS="$GDK_EXTRA_LIBS `$PKG_CONFIG --libs $GDK_PACKAGES` $MATH_LIB"
 GDK_DEP_CFLAGS="`$PKG_CONFIG --cflags  gthread-2.0 $GDK_PACKAGES` $GDK_EXTRA_CFLAGS"
 #
 # If we aren't writing explicit dependencies, then don't put the extra libraries we need
@@ -1320,7 +1320,7 @@ if test x"$os_openbsd" = xyes; then
 fi
 
 GTK_EXTRA_CFLAGS=
-GTK_DEP_LIBS="$GDK_EXTRA_LIBS $GTK_DEP_LIBS_FOR_X `$PKG_CONFIG --libs $PANGO_PACKAGES $GTK_PACKAGES_FOR_X $GTK_PACKAGES` $GTK_EXTRA_LIBS"
+GTK_DEP_LIBS="$GDK_EXTRA_LIBS $GTK_DEP_LIBS_FOR_X `$PKG_CONFIG --libs $PANGO_PACKAGES $GTK_PACKAGES_FOR_X $GTK_PACKAGES` $GTK_EXTRA_LIBS $MATH_LIB"
 GTK_DEP_CFLAGS="`$PKG_CONFIG --cflags  gthread-2.0 $GDK_PACKAGES $GTK_PACKAGES` $GDK_EXTRA_CFLAGS $GTK_EXTRA_CFLAGS"
 
 if test x"$os_win32" = xyes; then