gitlab-ci: Build i386 and ARM drivers in surfaceless mode.

I don't particularly care about getting x86/ARM cross-build coverage
of all the window systems, but we do want to be building src/mesa/
(for x86 asm) and gallium drivers (for vc4 NEON asm).  I'm also hoping
to use these build products for testing freedreno on actual HW (which
we do using surfaceless).

This increases the docker image from 1.4G to 1.5G.

Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Acked-by: Eric Engestrom <eric@engestrom.ch>

.gitlab-ci.yml

@@ -14,7 +14,7 @@
 # repository's registry will be used there as well.
 variables:
   UPSTREAM_REPO: mesa/mesa
-  DEBIAN_TAG: "2019-07-04"
+  DEBIAN_TAG: "2019-07-11"
   DEBIAN_VERSION: stretch-slim
   DEBIAN_IMAGE: "$CI_REGISTRY_IMAGE/debian/$DEBIAN_VERSION:$DEBIAN_TAG"
 
@@ -227,6 +227,71 @@ meson-vulkan:
     EXTRA_OPTION: >
       -D vulkan-overlay-layer=true
 
+.meson-cross:
+  extends: .meson-build
+  variables:
+    UNWIND: "false"
+    DRI_LOADERS: >
+      -D glx=disabled
+      -D gbm=false
+      -D egl=false
+      -D platforms=surfaceless
+      -D osmesa=none
+    GALLIUM_ST: >
+      -D dri3=false
+      -D gallium-vdpau=false
+      -D gallium-xvmc=false
+      -D gallium-omx=disabled
+      -D gallium-va=false
+      -D gallium-xa=false
+      -D gallium-nine=false
+      -D llvm=false
+    CROSS: >
+      --libdir lib
+      --cross /tmp/cross_file.txt
+
+  script:
+    - /usr/share/meson/debcrossgen --arch ${ARCH} -o /tmp/cross_file.txt
+    # Work around a bug in debcrossgen that should be fixed in the next release
+    - sed -i "s|cpu_family = 'i686'|cpu_family = 'x86'|g" /tmp/cross_file.txt
+    - .gitlab-ci/meson-build.sh
+
+meson-armhf:
+  extends: .meson-cross
+  variables:
+    ARCH: armhf
+    VULKAN_DRIVERS: freedreno
+    GALLIUM_DRIVERS: "etnaviv,freedreno,kmsro,lima,nouveau,panfrost,tegra,v3d,vc4"
+    # Disable the tests since we're cross compiling.
+    EXTRA_OPTION: >
+      -D build-tests=false
+      -D I-love-half-baked-turnips=true
+      -D vulkan-overlay-layer=true
+
+meson-arm64:
+  extends: .meson-cross
+  variables:
+    ARCH: arm64
+    VULKAN_DRIVERS: freedreno
+    GALLIUM_DRIVERS: "etnaviv,freedreno,kmsro,lima,nouveau,panfrost,tegra,v3d,vc4"
+    # Disable the tests since we're cross compiling.
+    EXTRA_OPTION: >
+      -D build-tests=false
+      -D I-love-half-baked-turnips=true
+      -D vulkan-overlay-layer=true
+
+meson-i386:
+  extends: .meson-cross
+  variables:
+    ARCH: i386
+    VULKAN_DRIVERS: intel
+    GALLIUM_DRIVERS: "swrast"
+    # Disable i386 tests, because u_format_tests gets precision
+    # failures in dxtn unpacking
+    EXTRA_OPTION: >
+      -D build-tests=false
+      -D vulkan-overlay-layer=true
+
 scons-nollvm:
   extends: .scons-build
   variables:

.gitlab-ci/debian-install.sh

@@ -5,6 +5,11 @@ set -o xtrace
 
 export DEBIAN_FRONTEND=noninteractive
 
+CROSS_ARCHITECTURES="armhf arm64 i386"
+for arch in $CROSS_ARCHITECTURES; do
+    dpkg --add-architecture $arch
+done
+
 apt-get install -y \
       apt-transport-https \
       ca-certificates \
@@ -75,6 +80,22 @@ apt-get install -y \
       gettext \
       make
 
+# Cross-build Mesa deps
+for arch in $CROSS_ARCHITECTURES; do
+    apt-get install -y \
+            libdrm-dev:${arch} \
+            libexpat1-dev:${arch} \
+            libelf-dev:${arch}
+done
+apt-get install -y \
+        dpkg-dev \
+        gcc-aarch64-linux-gnu \
+        g++-aarch64-linux-gnu \
+        gcc-arm-linux-gnueabihf \
+        g++-arm-linux-gnueabihf \
+        gcc-i686-linux-gnu \
+        g++-i686-linux-gnu
+
 # for 64bit windows cross-builds
 apt-get install -y mingw-w64
 
@@ -185,7 +206,6 @@ apt-get install -y libxml2-utils
 apt-get purge -y \
       automake \
       libtool \
-      make \
       curl \
       unzip \
       wget \

.gitlab-ci/meson-build.sh

@@ -16,6 +16,7 @@ fi
 
 rm -rf _build
 meson _build --native-file=native.file \
+      ${CROSS} \
       -D buildtype=debug \
       -D build-tests=true \
       -D libunwind=${UNWIND} \