lots of updates

pkgs/mesa/alpine-tls.patch

@@ -0,0 +1,24 @@
+--- a/meson.build
++++ b/meson.build
+@@ -448,7 +448,8 @@
+ 
+ # Android uses emutls for versions <= P/28. For USE_ELF_TLS we need ELF TLS.
+ use_elf_tls = false
+-if not ['windows', 'freebsd', 'openbsd', 'haiku'].contains(host_machine.system()) and (not with_platform_android or get_option('platform-sdk-version') >= 29)
++with_use_elf_tls = get_option('use-elf-tls')
++if with_use_elf_tls and not ['windows', 'freebsd'].contains(host_machine.system()) and (not with_platform_android or get_option('platform-sdk-version') >= 29)
+   pre_args += '-DUSE_ELF_TLS'
+   use_elf_tls = true
+ endif
+--- a/meson_options.txt
++++ b/meson_options.txt
+@@ -464,3 +464,9 @@
+   value : true,
+   description : 'use msse2 flag for mingw x86. Default: true',
+ )
++option(
++  'use-elf-tls',
++  type : 'boolean',
++  value : false,
++  description : 'Build support for initial-exec TLS model'
++)

pkgs/mesa/build.sh

@@ -7,7 +7,10 @@ fetch() {
 	tar -xf $pkgname-$pkgver.tar.gz
 	mkdir $pkgname-$pkgver/build
 	cp ../byacc-out-mid-build.patch .
+	cp ../alpine-tls.patch .
 	cp ../LICENSE .
+	cd $pkgname-$pkgver
+	patch -p1 < ../alpine-tls.patch
 }
 
 build() {
@@ -16,10 +19,10 @@ build() {
 	meson .. \
 		--prefix=/usr \
 		--buildtype=release \
-		-Dplatforms= \
+		-Dplatforms=wayland \
 		-Ddri3=true \
 		-Ddri-drivers=i915,i965 \
-		-Dgallium-drivers= \
+		-Dgallium-drivers=iris \
 		-Dgallium-vdpau=false \
 		-Dgallium-xvmc=false \
 		-Dgallium-omx=disabled \