chromium: fix build on ppc64le

srcpkgs/chromium/patches/xxx-ppc64le-libvpx.patch

@@ -0,0 +1,81 @@
+Uses generic target for now. To use ppc64le, change --target to ppc64le-gnu
+and add --enable-vsx, and change generic to ppc for the rtcd header.
+
+From 18e6c5c55cfae0cfb458d8210d7bc709360a0e90 Mon Sep 17 00:00:00 2001
+From: q66 <daniel@octaforge.org>
+Date: Wed, 9 Sep 2020 19:08:25 +0200
+Subject: [PATCH] enable generation of ppc64 libvpx bits
+
+this doesn't update the gni file, that's done from
+the template by running the appropriate scripts
+---
+ third_party/libvpx/BUILD.gn        | 4 ++++
+ third_party/libvpx/generate_gni.sh | 9 +++++++++
+ 2 files changed, 13 insertions(+)
+
+diff --git third_party/libvpx/BUILD.gn third_party/libvpx/BUILD.gn
+index 7198e59..3300485 100644
+--- third_party/libvpx/BUILD.gn
++++ third_party/libvpx/BUILD.gn
+@@ -336,6 +336,8 @@ static_library("libvpx") {
+     } else {
+       sources = libvpx_srcs_arm64
+     }
++  } else if (current_cpu == "ppc64") {
++    sources = libvpx_srcs_ppc64
+   }
+ 
+   configs -= [ "//build/config/compiler:chromium_code" ]
+@@ -401,6 +403,8 @@ static_library("libvp9rc") {
+     } else {
+       sources = libvpx_srcs_arm64
+     }
++  } else if (current_cpu == "ppc64") {
++    sources = libvpx_srcs_ppc64
+   }
+   sources += [ "//third_party/libvpx/source/libvpx/vp9/ratectrl_rtc.cc" ]
+   sources += [ "//third_party/libvpx/source/libvpx/vp9/ratectrl_rtc.h" ]
+diff --git third_party/libvpx/generate_gni.sh third_party/libvpx/generate_gni.sh
+index bcf84b0..8a3f4f1 100755
+--- third_party/libvpx/generate_gni.sh
++++ third_party/libvpx/generate_gni.sh
+@@ -361,6 +361,7 @@ gen_config_files linux/arm-neon-highbd "--target=armv7-linux-gcc ${all_platforms
+ gen_config_files linux/arm64-highbd "--target=armv8-linux-gcc ${all_platforms} ${HIGHBD}"
+ gen_config_files linux/mipsel "--target=mips32-linux-gcc ${all_platforms}"
+ gen_config_files linux/mips64el "--target=mips64-linux-gcc ${all_platforms}"
++gen_config_files linux/ppc64 "--target=generic-gnu $HIGHBD ${all_platforms}"
+ gen_config_files linux/generic "--target=generic-gnu $HIGHBD ${all_platforms}"
+ gen_config_files win/arm64 "--target=arm64-win64-vs15 ${all_platforms} ${HIGHBD}"
+ gen_config_files win/ia32 "--target=x86-win32-vs14 ${all_platforms} ${x86_platforms}"
+@@ -386,6 +387,7 @@ lint_config linux/arm-neon-highbd
+ lint_config linux/arm64-highbd
+ lint_config linux/mipsel
+ lint_config linux/mips64el
++lint_config linux/ppc64
+ lint_config linux/generic
+ lint_config win/arm64
+ lint_config win/ia32
+@@ -415,6 +417,7 @@ gen_rtcd_header linux/arm-neon-highbd armv7
+ gen_rtcd_header linux/arm64-highbd armv8
+ gen_rtcd_header linux/mipsel mipsel
+ gen_rtcd_header linux/mips64el mips64el
++gen_rtcd_header linux/ppc64 generic
+ gen_rtcd_header linux/generic generic
+ gen_rtcd_header win/arm64 armv8
+ gen_rtcd_header win/ia32 x86 "${require_sse2}"
+@@ -500,6 +503,12 @@ if [ -z $ONLY_CONFIGS ]; then
+ 
+   echo "MIPS64 source list is identical to MIPS source list. No need to generate it."
+ 
++  echo "Generate ppc64 source list."
++  config=$(print_config_basic linux/ppc64)
++  make_clean
++  make libvpx_srcs.txt target=libs $config > /dev/null
++  convert_srcs_to_project_files libvpx_srcs.txt libvpx_srcs_ppc64
++
+   echo "Generate NaCl source list."
+   config=$(print_config_basic nacl)
+   make_clean
+-- 
+2.28.0
+

srcpkgs/chromium/patches/xxx-ppc64le-swiftshader.patch

@@ -0,0 +1,18 @@
+--- third_party/swiftshader/third_party/llvm-10.0/BUILD.gn
++++ third_party/swiftshader/third_party/llvm-10.0/BUILD.gn
+@@ -574,6 +574,7 @@ swiftshader_llvm_source_set("swiftshader
+     "llvm/lib/MC/MCAsmInfoCOFF.cpp",
+     "llvm/lib/MC/MCAsmInfoDarwin.cpp",
+     "llvm/lib/MC/MCAsmInfoELF.cpp",
++    "llvm/lib/MC/MCAsmInfoXCOFF.cpp",
+     "llvm/lib/MC/MCAsmMacro.cpp",
+     "llvm/lib/MC/MCAsmStreamer.cpp",
+     "llvm/lib/MC/MCAssembler.cpp",
+@@ -629,6 +630,7 @@ swiftshader_llvm_source_set("swiftshader
+     "llvm/lib/MC/MCWinCOFFStreamer.cpp",
+     "llvm/lib/MC/MCWinEH.cpp",
+     "llvm/lib/MC/MCXCOFFStreamer.cpp",
++    "llvm/lib/MC/MCXCOFFObjectTargetWriter.cpp",
+     "llvm/lib/MC/MachObjectWriter.cpp",
+     "llvm/lib/MC/StringTableBuilder.cpp",
+     "llvm/lib/MC/SubtargetFeature.cpp",

srcpkgs/chromium/template

@@ -72,6 +72,10 @@ post_patch() {
 		sed -i '/config("compiler")/ a cflags_cc = [ "-fno-delete-null-pointer-checks" ]' \
 			build/config/linux/BUILD.gn
 	fi
+
+	# prevent annoying errors when regenerating gni
+	vsed -i 's,^update_readme$,#update_readme,' \
+		third_party/libvpx/generate_gni.sh
 }
 do_configure() {
 	local system="" conf=()
@@ -82,6 +86,26 @@ do_configure() {
 		export CXX=clang++
 	fi
 
+	export LDFLAGS="-pthread"
+
+	# compile gn early, so it can be used to generate gni stuff
+	AR="ar" CC=$CC_FOR_BUILD CXX=$CXX_FOR_BUILD LD=$CXX_FOR_BUILD \
+	python2 tools/gn/bootstrap/bootstrap.py --skip-generate-buildfiles
+
+	# we need to generate ppc64 stuff for libvpx as it's not shipped
+	# this has to be done before unbundling, but after gn is built
+	# comment out if we switch back to system libvpx again later
+	case "$XBPS_TARGET_MACHINE" in
+		ppc64*)
+			pushd third_party/libvpx
+			mkdir -p source/config/linux/ppc64
+			# need PATH to find gn
+			PATH="${wrksrc}/out/Release:$PATH" ./generate_gni.sh || \
+				msg_error "failed to generate libvpx gni"
+			popd
+			;;
+	esac
+
 	# Use system-provided libraries.
 	# TODO: use_system_hunspell (upstream changes needed).
 	# TODO: use_system_libsrtp.
@@ -227,13 +251,6 @@ do_configure() {
 		ppc64*) conf+=( 'target_cpu="ppc64"' ) ;;
 	esac
 
-	export LDFLAGS="-pthread"
-
-	AR="ar" CC=$CC_FOR_BUILD CXX=$CXX_FOR_BUILD LD=$CXX_FOR_BUILD \
-	python2 tools/gn/bootstrap/bootstrap.py -s -v \
-		--gn-gen-args "${conf[*]}"
-
-
 	out/Release/gn gen out/Release --args="${conf[*]}"
 }
 do_build() {