package/freeswitch: fix libvpx build

Fixes:
http://autobuild.buildroot.net/results/4be/4be6df27f33e4fd6955e47892e1650a9d5ebbded/

Removed old patch.

Source of the new patch:
http://lists.busybox.net/pipermail/buildroot/2020-January/270707.html

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/freeswitch/0001-Fix-cross-compiling-libvpx.patch

@@ -1,29 +0,0 @@
-Fix cross-compiling libvpx
-
-Freeswitch since version 1.6.7 only uses an in-tree-version of libvpx:
-https://freeswitch.org/fisheye/changelog/freeswitch?cs=febe0f8dacea2d2a31902b3dc469be757f8c3c4d
-
-It is not possible to use an external version of libvpx anymore.
-Unfortunately the freeswitch build system has no support for cross-
-compiling libvpx so we need to patch Makefile to pass CROSS from
-package/freeswitch/freeswitch.mk and add target=generic-gnu as
-configure parameter:
-https://freeswitch.org/stash/projects/FS/repos/freeswitch/browse/libs/libvpx/README#110
-
-And yes, autoreconf is also broken, so we patch Makefile.in instead
-of Makefile.am.
-
-Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
-
-diff -uNr freeswitch-1.6.7.org/Makefile.in freeswitch-1.6.7/Makefile.in
---- freeswitch-1.6.7.org/Makefile.in	2016-04-01 18:09:54.000000000 +0200
-+++ freeswitch-1.6.7/Makefile.in	2016-04-22 20:11:37.938961730 +0200
-@@ -4182,7 +4182,7 @@
- 	cd libs/libzrtp && $(MAKE)
- 
- libs/libvpx/Makefile: libs/libvpx/.update
--	cd libs/libvpx && CC="$(CC)" CXX="$(CXX)" CFLAGS="$(CFLAGS) $(VISIBILITY_FLAG)" CXXFLAGS="$(CXXFLAGS)" LDFLAGS="$(LDFLAGS)" ./configure --enable-pic --disable-docs --disable-examples --disable-install-bins --disable-install-srcs --disable-unit-tests --size-limit=16384x16384
-+	cd libs/libvpx && CROSS=$(CROSS) CC="$(CC)" CXX="$(CXX)" CFLAGS="$(CFLAGS) $(VISIBILITY_FLAG)" CXXFLAGS="$(CXXFLAGS)" LDFLAGS="$(LDFLAGS)" ./configure --enable-pic --disable-docs --disable-examples --disable-install-bins --disable-install-srcs --disable-unit-tests --size-limit=16384x16384
- 
- libs/libvpx/libvpx.a: libs/libvpx/Makefile libs/libvpx/.update
- 	@cd libs/libvpx && $(MAKE)

package/freeswitch/freeswitch.mk

@@ -309,6 +309,39 @@ FREESWITCH_CONF_OPTS += --enable-libvpx --enable-libyuv
 FREESWITCH_DEPENDENCIES += host-yasm ffmpeg
 FREESWITCH_ENABLED_MODULES += applications/mod_av applications/mod_fsv
 FREESWITCH_MAKE_ENV += CROSS=$(TARGET_CROSS)
+
+# Freeswitch's buildsystem forgets to pass important environment
+# variables and config options when it configures libvpx, so
+# pre-build libvpx manually, so Freeswitch does not attempt to run
+# its flawed commands...
+# Freeswitch only ever uses the static libtrary, that's hard-coded,
+# we can't do anything about that...
+# From package/libvpx/libvpx.mk:
+# - this is not a true autotools package.  It is based on the ffmpeg
+#   build system.
+# - ld is being used with cc options. therefore, pretend ld is cc.
+define FREESWITCH_BUILD_LIBVPX
+	cd $(@D)/libs/libvpx && \
+	$(TARGET_CONFIGURE_OPTS) \
+	$(TARGET_CONFIGURE_ARGS) \
+	LD="$(TARGET_CC)" \
+	CROSS=$(GNU_TARGET_NAME) \
+	./configure \
+		--target=generic-gnu \
+		--enable-pic \
+		--prefix=/usr \
+		--disable-shared --enable-static \
+		--disable-examples \
+		--disable-docs \
+		--disable-unit-tests && \
+	$(TARGET_MAKE_ENV) \
+	$(LIBVPX_MAKE_ENV) \
+	$(MAKE) \
+		-C $(@D)/libs/libvpx \
+		all
+endef
+FREESWITCH_PRE_BUILD_HOOKS += FREESWITCH_BUILD_LIBVPX
+
 else
 FREESWITCH_CONF_OPTS += --disable-libvpx --disable-libyuv
 endif