Add support for mips64el

Credit goes to @mara0004
See #93

Author: bblanchon

.github/workflows/build-all.yml

@@ -316,6 +316,17 @@ jobs:
       target_cpu: arm64
       enable_v8: true
 
+  linux_mips64el:
+    name: Linux mips64el
+    uses: ./.github/workflows/build.yml
+    with:
+      branch: ${{ github.event.inputs.branch }}
+      version: ${{ github.event.inputs.version }}
+      is_debug: ${{ github.event.inputs.is_debug == 'true' }}
+      target_os: linux
+      target_cpu: mips64el
+      enable_v8: false
+
   linux_ppc64:
     name: Linux ppc64
     uses: ./.github/workflows/build.yml
@@ -749,6 +760,7 @@ jobs:
       - linux_musl_arm64
       - linux_musl_x64
       - linux_musl_x86
+      - linux_mips64el
       - linux_ppc64
       - linux_x64
       - linux_x64_v8

.github/workflows/build-one.yml

@@ -27,6 +27,7 @@ on:
         options:
           - arm
           - arm64
+          - mips64el
           - ppc64
           - x64
           - x86

.github/workflows/build.yml

@@ -28,7 +28,7 @@ on:
         type: string
         required: true
       target_cpu:
-        description: Target (CPU arm|arm64|ppc64|x64|x86|wasm)
+        description: Target (CPU arm|arm64|mips64el|ppc64|x64|x86|wasm)
         type: string
         required: true
       target_environment:

.github/workflows/patch.yml

@@ -59,6 +59,8 @@ jobs:
             environment: musl
           - os: linux
             cpu: ppc64
+          - os: linux
+            cpu: mips64el
           - os: emscripten
             cpu: wasm
     steps:

README.md

@@ -97,6 +97,11 @@ Here are the download links for latest release:
     <td><a href="https://github.com/bblanchon/pdfium-binaries/releases/latest/download/pdfium-linux-arm64.tgz">pdfium-linux-arm64.tgz</a></td>
     <td><a href="https://github.com/bblanchon/pdfium-binaries/releases/latest/download/pdfium-v8-linux-arm64.tgz">pdfium-v8-linux-arm64.tgz</a></td>
   </tr>
+  <tr>
+    <td>mips64el</td>
+    <td><a href="https://github.com/bblanchon/pdfium-binaries/releases/latest/download/pdfium-linux-mips64el.tgz">pdfium-linux-mips64el.tgz</a></td>
+    <td>not tested yet</td>
+  </tr>
   <tr>
     <td>ppc64</td>
     <td><a href="https://github.com/bblanchon/pdfium-binaries/releases/latest/download/pdfium-linux-ppc64.tgz">pdfium-linux-ppc64.tgz</a></td>
@@ -311,7 +316,7 @@ The following projects use (or recommend using) our PDFium builds:
     <tr>
       <td><img src="https://github.com/mara004.png" width="48" height="48" alt="mara004"></td>
       <td><a href="https://github.com/mara004"><code>@mara004</code></a></td>
-      <td>Conda packages. ppc64 build. Constant aid.</td>
+      <td>Conda packages. ppc and mips builds. Constant aid.</td>
     </tr>
     <tr>
       <td><img src="https://github.com/mgiessing.png" width="48" height="48" alt="Marvin Gießing"></td>

build.sh

@@ -1,7 +1,7 @@
 #!/bin/bash -eu
 
 OS_NAMES="android|emscripten|ios|linux|mac|win"
-CPU_NAMES="arm|arm64|ppc64|x64|x86|wasm"
+CPU_NAMES="arm|arm64|mips64el|ppc64|x64|x86|wasm"
 ENV_NAMES="catalyst|device|musl|simulator"
 OS_ENV_COMBINATIONS="linux musl|ios (catalyst|device|simulator)"
 STEP_REGEX="[0-9]|10"

patches/mips64el/build.patch

@@ -0,0 +1,28 @@
+diff --git a/config/compiler/BUILD.gn b/config/compiler/BUILD.gn
+index e1da114..70a4b9e 100644
+--- a/config/compiler/BUILD.gn
++++ b/config/compiler/BUILD.gn
+@@ -655,14 +655,6 @@ config("compiler") {
+     } else {
+       cflags += [ "-ffp-contract=off" ]
+     }
+-
+-    # Enable ELF CREL (see crbug.com/357878242) for all platforms that use ELF.
+-    # TODO(crbug.com/376278218): This causes segfault on Linux ARM builds.
+-    # It also causes segfault on Linux s390x:
+-    # https://github.com/llvm/llvm-project/issues/149511
+-    if (is_linux && use_lld && current_cpu != "arm" && current_cpu != "s390x") {
+-      cflags += [ "-Wa,--crel,--allow-experimental-crel" ]
+-    }
+   }
+ 
+   # C11/C++11 compiler flags setup.
+@@ -1085,7 +1077,7 @@ config("linker") {
+ 
+   if (is_linux || is_chromeos || is_android || is_fuchsia) {
+     ldflags += [
+-      "-Wl,-z,noexecstack",
++      "-Wl,-z,execstack",
+       "-Wl,-z,relro",
+     ]
+ 

steps/01-install.sh

@@ -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
           ;;
 
+        mips64el)
+          sudo apt-get install -y gcc-11-multilib g++-11-mips64el-linux-gnuabi64 gcc-11-mips64el-linux-gnuabi64
+          sudo update-alternatives --install /usr/bin/mips64el-linux-gnuabi64-gcc mips64el-linux-gnuabi64-gcc /usr/bin/mips64el-linux-gnuabi64-gcc-11 100
+          sudo update-alternatives --install /usr/bin/mips64el-linux-gnuabi64-g++ mips64el-linux-gnuabi64-g++ /usr/bin/mips64el-linux-gnuabi64-g++-11 100
+          sudo update-alternatives --set mips64el-linux-gnuabi64-gcc /usr/bin/mips64el-linux-gnuabi64-gcc-11
+          sudo update-alternatives --set mips64el-linux-gnuabi64-g++ /usr/bin/mips64el-linux-gnuabi64-g++-11
+          ;;
+
         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

steps/03-patch.sh

@@ -79,6 +79,9 @@ case "$TARGET_ENVIRONMENT" in
 esac
 
 case "$TARGET_CPU" in
+  mips64el)
+    apply_patch "$PATCHES/mips64el/build.patch" build
+    ;;
   ppc64)
     apply_patch "$PATCHES/ppc64/pdfium.patch"
     apply_patch "$PATCHES/ppc64/build.patch" build

steps/09-test.sh

@@ -86,6 +86,9 @@ case "$OS" in
           SUFFIX="-10"
         fi
         ;;
+      mips64el)
+        PREFIX="mips64el-linux-gnuabi64-"
+        ;;
       ppc64)
         PREFIX="powerpc64le-linux-gnu-"
         ;;