PPC64: cross build for ppc64 architecture

Author: bblanchon

.github/workflows/build-one.yml

@@ -27,6 +27,7 @@ on:
         options:
           - arm
           - arm64
+          - ppc64
           - x64
           - x86
           - wasm

.github/workflows/build.yml

@@ -28,7 +28,7 @@ on:
         type: string
         required: true
       target_cpu:
-        description: Target (CPU arm|arm64|x64|x86|wasm)
+        description: Target (CPU arm|arm64|ppc64|x64|x86|wasm)
         type: string
         required: true
       target_environment:

build.sh

@@ -1,7 +1,7 @@
 #!/bin/bash -eu
 
 OS_NAMES="android|emscripten|ios|linux|mac|win"
-CPU_NAMES="arm|arm64|x64|x86|wasm"
+CPU_NAMES="arm|arm64|ppc64|x64|x86|wasm"
 ENV_NAMES="catalyst|device|musl|simulator"
 OS_ENV_COMBINATIONS="linux musl|ios (catalyst|device|simulator)"
 STEP_REGEX="[0-9]"

patches/ppc64/build.patch

@@ -0,0 +1,36 @@
+diff --git a/linux/sysroot_scripts/install-sysroot.py b/linux/sysroot_scripts/install-sysroot.py
+index 3158972..fadb431 100755
+--- a/linux/sysroot_scripts/install-sysroot.py
++++ b/linux/sysroot_scripts/install-sysroot.py
+@@ -46,6 +46,7 @@ ARCH_TRANSLATIONS = {
+     "mips": "mipsel",
+     "mips64": "mips64el",
+     "ppc64le": "ppc64el",
++    "ppc64": "ppc64el",
+ }
+ 
+ DEFAULT_TARGET_PLATFORMS = {
+diff --git a/toolchain/linux/BUILD.gn b/toolchain/linux/BUILD.gn
+index a6e20a0..b98f5dc 100644
+--- a/toolchain/linux/BUILD.gn
++++ b/toolchain/linux/BUILD.gn
+@@ -312,12 +312,14 @@ gcc_toolchain("s390x") {
+ }
+ 
+ gcc_toolchain("ppc64") {
+-  cc = "gcc"
+-  cxx = "g++"
++  toolprefix = "powerpc64le-linux-gnu-"
+ 
+-  readelf = "readelf"
+-  nm = "nm"
+-  ar = "ar"
++  cc = "${toolprefix}gcc"
++  cxx = "${toolprefix}g++"
++
++  readelf = "${toolprefix}readelf"
++  nm = "${toolprefix}nm"
++  ar = "${toolprefix}ar"
+   ld = cxx
+ 
+   toolchain_args = {

steps/01-install.sh

@@ -70,7 +70,7 @@ case "$TARGET_OS" in
 
       sudo apt-get install -y $PACKAGES
 
-    else
+    else # i.e. not musl
 
       case "$TARGET_CPU" in
         arm)
@@ -81,6 +81,14 @@ case "$TARGET_OS" in
           sudo apt-get install -y libc6-i386 gcc-10-multilib g++-10-aarch64-linux-gnu gcc-10-aarch64-linux-gnu
           ;;
 
+        ppc64)
+          sudo apt-get install -y gcc-11-multilib g++-11-powerpc64le-linux-gnu gcc-11-powerpc64le-linux-gnu
+          sudo update-alternatives --install /usr/bin/powerpc64le-linux-gnu-gcc powerpc64le-linux-gnu-gcc /usr/bin/powerpc64le-linux-gnu-gcc-11 100
+          sudo update-alternatives --install /usr/bin/powerpc64le-linux-gnu-g++ powerpc64le-linux-gnu-g++ /usr/bin/powerpc64le-linux-gnu-g++-11 100
+          sudo update-alternatives --set powerpc64le-linux-gnu-gcc /usr/bin/powerpc64le-linux-gnu-gcc-11
+          sudo update-alternatives --set powerpc64le-linux-gnu-g++ /usr/bin/powerpc64le-linux-gnu-g++-11
+          ;;
+
         x86)
           sudo apt-get install -y g++-multilib
           ;;

steps/03-patch.sh

@@ -3,6 +3,7 @@
 PATCHES="$PWD/patches"
 SOURCE="${PDFium_SOURCE_DIR:-pdfium}"
 OS="${PDFium_TARGET_OS:?}"
+TARGET_CPU="${PDFium_TARGET_CPU:?}"
 TARGET_ENVIRONMENT="${PDFium_TARGET_ENVIRONMENT:-}"
 ENABLE_V8=${PDFium_ENABLE_V8:-false}
 
@@ -68,4 +69,10 @@ case "$TARGET_ENVIRONMENT" in
     ;;
 esac
 
+case "$TARGET_CPU" in
+  ppc64)
+    apply_patch "$PATCHES/ppc64/build.patch" build
+    ;;
+esac
+
 popd

steps/05-configure.sh

@@ -40,6 +40,10 @@ mkdir -p "$BUILD"
       ;;
     linux)
       echo "clang_use_chrome_plugins = false"
+      if [ "$TARGET_CPU" == 'ppc64' ]; then
+        echo 'is_clang = false'
+        echo 'use_custom_libcxx = false'
+      fi
       ;;
     mac)
       echo "clang_use_chrome_plugins = false"

steps/09-test.sh

@@ -86,6 +86,9 @@ case "$OS" in
           SUFFIX="-10"
         fi
         ;;
+      ppc64)
+        PREFIX="powerpc64le-linux-gnu-"
+        ;;
       x86)
         if [ "$TARGET_ENVIRONMENT" == "musl" ]; then
           PREFIX="i686-linux-musl-"