Build LLVM toolchain with Ninja

We need to build our own Ninja as the version in the almalinux-8
repository is too old and causes the following errors:

ninja : error : multiple outputs aren't (yet?) supported by depslog; bring this up on the mailing list if it affects you

This was fixed in Ninja v1.10.

Signed-off-by: Alice Ziuziakowska <[email protected]>

Author: ziuziakowska

build-clang-with-args.sh

@@ -135,6 +135,7 @@ llvm_distribution_components+=";${llvm_tools}"
 
 cmake "${llvm_dir}/llvm" \
   -Wno-dev \
+  -GNinja \
   -DCMAKE_BUILD_TYPE="${build_type}" \
   -DCMAKE_INSTALL_PREFIX="${dist_dir}" \
   -DLLVM_TARGETS_TO_BUILD="RISCV" \

prepare-host.sh

@@ -33,3 +33,13 @@ dnf install -y \
   libffi-devel \
   expat-static \
   lld
+
+# the version of ninja in almalinux-8 is too old -
+# we need at least version v1.10, so just build it ourselves
+TMP_DIR="$(mktemp -d)"
+git clone https://github.com/ninja-build/ninja.git \
+    --branch v1.12.0 --depth 1 "${TMP_DIR}"
+cd "${TMP_DIR}"
+./configure.py --bootstrap
+install ninja /bin
+rm -rf "{$TMP_DIR}"