libsdl2-ttf: Check for x11 and opengl in distro features

when X11 is not in distro features it tries to link with
libGL which does not exist and compile fails

Add a patch to add foreign option to AUTOMAKE_OPTIONS
which lets it configure and relax automake rules to not
check for some GNU specific files

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-oe/recipes-support/libsdl-ttf/files/automake_foreign.patch

@@ -0,0 +1,13 @@
+Index: SDL2_ttf-2.0.14/Makefile.am
+===================================================================
+--- SDL2_ttf-2.0.14.orig/Makefile.am
++++ SDL2_ttf-2.0.14/Makefile.am
+@@ -1,6 +1,8 @@
+ # Makefile.am for the SDL truetype font loading library and viewer
+ lib_LTLIBRARIES = libSDL2_ttf.la
+ 
++AUTOMAKE_OPTIONS = foreign
++
+ libSDL2_ttfincludedir = $(includedir)/SDL2
+ libSDL2_ttfinclude_HEADERS =	\
+ 	SDL_ttf.h

meta-oe/recipes-support/libsdl-ttf/libsdl2-ttf_2.0.14.bb

@@ -1,23 +1,25 @@
 SUMMARY = "Simple DirectMedia Layer truetype font library"
 SECTION = "libs"
-DEPENDS = "virtual/libsdl2 freetype"
+DEPENDS = "virtual/libsdl2 freetype virtual/libgl"
 LICENSE = "Zlib"
 LIC_FILES_CHKSUM = "file://COPYING.txt;md5=cb33e7c4df9fbde389f149ad6bc93ce5"
 
 SRC_URI = " \
     http://www.libsdl.org/projects/SDL_ttf/release/SDL2_ttf-${PV}.tar.gz \
     file://use.pkg-config.for.freetype2.patch \
+    file://automake_foreign.patch \
 "
 SRC_URI[md5sum] = "e53c05e1e7f1382c316afd6c763388b1"
 SRC_URI[sha256sum] = "34db5e20bcf64e7071fe9ae25acaa7d72bdc4f11ab3ce59acc768ab62fe39276"
 
 S = "${WORKDIR}/SDL2_ttf-${PV}"
 
-inherit autotools pkgconfig
+inherit autotools pkgconfig distro_features_check
+
+# links to libGL.so
+REQUIRED_DISTRO_FEATURES += "x11 opengl"
 
 do_configure_prepend() {
-    touch ${S}/NEWS ${S}/README ${S}/AUTHORS ${S}/ChangeLog
-
     # Removing these files fixes a libtool version mismatch.
     MACROS="libtool.m4 lt~obsolete.m4 ltoptions.m4 ltsugar.m4 ltversion.m4"
 
@@ -25,3 +27,4 @@ do_configure_prepend() {
         rm -f ${S}/acinclude/$i
     done
 }
+ASNEEDED = ""