From a939ba0c4c3f4924e441ce06d1310274b6ac34db Mon Sep 17 00:00:00 2001
From: Michael Platings <michael.platings@arm.com>
Date: Tue, 12 Mar 2024 10:35:40 +0000
Subject: [PATCH] Enable running ci.sh on an x86 machine

---
 .gitlab-ci.yml    |  2 +-
 docker/Dockerfile | 25 +++++++++++++++++++++++++
 scripts/ci.sh     | 28 +++++++++++++++++-----------
 3 files changed, 43 insertions(+), 12 deletions(-)

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index e67964ac0..5d86dd6b3 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -2,7 +2,7 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 
-image: registry.gitlab.arm.com/intrinsiccv/intrinsiccv:4
+image: registry.gitlab.arm.com/intrinsiccv/intrinsiccv:5
 
 # Only run CI for main branch & merge requests
 workflow:
diff --git a/docker/Dockerfile b/docker/Dockerfile
index 9227aa203..61ec1571a 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -42,6 +42,31 @@ RUN wget -q https://apt.llvm.org/llvm-snapshot.gpg.key -O /etc/apt/trusted.gpg.d
         libclang-rt-${LLVM_VERSION}-dev \
         llvm-${LLVM_VERSION}
 
+# Install libclang-rt-dev on an x86 host.
+# Hacks are needed to make this work:
+# 1. Once we add the arm64 architecture then apt update will fail so
+#    ignore the error.
+# 2. libclang-rt-dev declares a dependency on libc & libc++ which isn't
+#    needed to build, so edit the package to remove all dependencies.
+RUN if [ $(dpkg --print-architecture) = amd64 ]; then \
+    dpkg --add-architecture arm64 \
+    && (apt-get -y update || true) \
+    && cd /tmp \
+    && apt-get -y download libclang-rt-${LLVM_VERSION}-dev:arm64 \
+    && dpkg-deb -x libclang-rt*.deb libclang-rt \
+    && dpkg-deb --control libclang-rt*.deb libclang-rt/DEBIAN \
+    && sed -i '/Depends:/d' libclang-rt/DEBIAN/control \
+    && dpkg -b libclang-rt libclang-rt.deb \
+    && apt-get -y install ./libclang-rt.deb \
+    && rm -rf libclang-rt* \
+    ; fi
+
+# Hacks required to run tests on an x86 host.
+RUN if [ $(dpkg --print-architecture) = amd64 ]; then \
+    ln -sf /usr/aarch64-linux-gnu/lib/ld-linux-aarch64.so.1 /lib \
+    ; fi
+ENV LD_LIBRARY_PATH=/usr/aarch64-linux-gnu/lib
+
 RUN pipx install cpplint==1.6.1
 RUN pipx install gcovr==6.0
 RUN pipx install reuse==3.0.0
diff --git a/scripts/ci.sh b/scripts/ci.sh
index a6785d478..fe873d28d 100755
--- a/scripts/ci.sh
+++ b/scripts/ci.sh
@@ -31,7 +31,7 @@ doxygen
 # Build
 cmake -S . -B build -G Ninja \
   -DCMAKE_CXX_CLANG_TIDY=clang-tidy \
-  -DCMAKE_CXX_FLAGS="--coverage" \
+  -DCMAKE_CXX_FLAGS="--target=aarch64-linux-gnu --coverage" \
   -DINTRINSICCV_ENABLE_SVE2=ON \
   -DINTRINSICCV_ENABLE_SVE2_SELECTIVELY=OFF \
   -DINTRINSICCV_CHECK_BANNED_FUNCTIONS=ON
@@ -42,7 +42,7 @@ echo '{"Checks": "-*,cppcoreguidelines-avoid-goto"}'>build/.clang-tidy
 ninja -C build
 
 # Build with GCC
-CC=gcc CXX=g++ cmake -S . -B build/gcc -G Ninja
+CC=aarch64-linux-gnu-gcc CXX=aarch64-linux-gnu-g++ cmake -S . -B build/gcc -G Ninja
 ninja -C build/gcc
 
 # Run tests
@@ -67,14 +67,20 @@ scripts/prefix_testsuite_names.py build/test-results/gcc-neon/intrinsiccv-api-te
 # Generate test coverage report
 LLVM_COV=llvm-cov scripts/generate_coverage_report.py
 
-# Clang address & undefined behaviour sanitizers
-cmake -S . -B build/sanitize -G Ninja \
-  -DINTRINSICCV_ENABLE_SME2=OFF \
-  -DCMAKE_CXX_FLAGS="-fsanitize=address,undefined -fno-sanitize-recover=all -Wno-pass-failed"
-ninja -C build/sanitize intrinsiccv-api-test
-build/sanitize/test/api/intrinsiccv-api-test
-
-# Check OpenCV-IntrinsicCV integration
-scripts/ci-opencv.sh
+# Sanitizers don't work when run through qemu so must be run natively.
+if [[ $(dpkg --print-architecture) = arm64 ]]; then
+  # Clang address & undefined behaviour sanitizers
+  cmake -S . -B build/sanitize -G Ninja \
+    -DINTRINSICCV_ENABLE_SME2=OFF \
+    -DCMAKE_CXX_FLAGS="-fsanitize=address,undefined -fno-sanitize-recover=all -Wno-pass-failed"
+  ninja -C build/sanitize intrinsiccv-api-test
+  build/sanitize/test/api/intrinsiccv-api-test
+fi
+
+# TODO: Cross-build OpenCV
+if [[ $(dpkg --print-architecture) = arm64 ]]; then
+  # Check OpenCV-IntrinsicCV integration
+  scripts/ci-opencv.sh
+fi
 
 exit $TESTRESULT
-- 
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