ci: add ppc64le cross compilation in GHA

Enable Github Actions to cross-compile code for POWER systems.

Signed-off-by: David Christensen <drc@linux.vnet.ibm.com>
Reviewed-by: David Marchand <david.marchand@redhat.com>

.ci/linux-build.sh

@@ -64,6 +64,10 @@ if [ "$AARCH64" = "true" ]; then
     fi
 fi
 
+if [ "$PPC64LE" = "true" ]; then
+    OPTS="$OPTS --cross-file config/ppc/ppc64le-power8-linux-gcc-ubuntu1804"
+fi
+
 if [ "$BUILD_DOCS" = "true" ]; then
     OPTS="$OPTS -Denable_docs=true"
 fi
@@ -86,7 +90,7 @@ OPTS="$OPTS -Dcheck_includes=true"
 meson build --werror $OPTS
 ninja -C build
 
-if [ "$AARCH64" != "true" ]; then
+if [ "$AARCH64" != "true" ] && [ "$PPC64LE" != "true" ]; then
     failed=
     configure_coredump
     devtools/test-null.sh || failed="true"

.github/workflows/build.yml

@@ -21,6 +21,7 @@ jobs:
       CC: ccache ${{ matrix.config.compiler }}
       DEF_LIB: ${{ matrix.config.library }}
       LIBABIGAIL_VERSION: libabigail-1.8
+      PPC64LE: ${{ matrix.config.cross == 'ppc64le' }}
       REF_GIT_TAG: none
       RUN_TESTS: ${{ contains(matrix.config.checks, 'tests') }}
 
@@ -56,6 +57,14 @@ jobs:
             compiler: gcc
             library: shared
             cross: aarch64
+          - os: ubuntu-18.04
+            compiler: gcc
+            library: static
+            cross: ppc64le
+          - os: ubuntu-18.04
+            compiler: gcc
+            library: shared
+            cross: ppc64le
 
     steps:
     - name: Checkout sources
@@ -107,8 +116,12 @@ jobs:
       if: env.AARCH64 == 'true'
       run: sudo apt install -y gcc-aarch64-linux-gnu libc6-dev-arm64-cross
         pkg-config-aarch64-linux-gnu
+    - name: Install ppc64le cross compiling packages
+      if: env.PPC64LE == 'true'
+      run: sudo apt install -y gcc-powerpc64le-linux-gnu libc6-dev-ppc64el-cross
+        pkg-config-powerpc-linux-gnu
     - name: Install test tools packages
-      if: env.AARCH64 != 'true' || env.RUN_TESTS == 'true'
+      if: env.AARCH64 != 'true' || env.PPC64LE != 'true' || env.RUN_TESTS == 'true'
       run: sudo apt install -y gdb
     - name: Install doc generation packages
       if: env.BUILD_DOCS == 'true'

config/ppc/ppc64le-power8-linux-gcc-ubuntu1804

@@ -0,0 +1,11 @@
+[binaries]
+c = 'powerpc64le-linux-gnu-gcc'
+cpp = 'powerpc64le-linux-gnu-cpp'
+ar = 'powerpc64le-linux-gnu-ar'
+strip = 'powerpc64le-linux-gnu-strip'
+
+[host_machine]
+system = 'linux'
+cpu_family = 'ppc64'
+cpu = 'power8'
+endian = 'little'