FIXME: Add eld support

FIXME: update the src URL when a tag is published.

Use LLVM_ENABLE_PIC=ON to build the toolchains, required for building eld.

This change has the effect of causing some of the cross-built toolchains
to fail.  So we'll disable the eld build on these for now.

Signed-off-by: Brian Cain <[email protected]>

Author: androm3da

Dockerfile

@@ -68,6 +68,7 @@ ENV ROOT_INSTALL /usr/local/hexagon-unknown-linux-musl-rootfs
 ENV MAKE_TARBALLS 1
 
 ENV LLVM_SRC_URL https://github.com/llvm/llvm-project/archive/llvmorg-${VER}.tar.gz
+ENV ELD_SRC_URL https://github.com/qualcomm/eld/archive/eld-0.1.tar.gz
 ENV LLVM_TESTS_SRC_URL https://github.com/llvm/llvm-test-suite/archive/llvmorg-${VER}.tar.gz
 ENV MUSL_SRC_URL https://github.com/quic/musl/archive/hexagon-mar1-2025.tar.gz
 ENV LINUX_SRC_URL https://cdn.kernel.org/pub/linux/kernel/v6.x/linux-6.13.5.tar.xz

build-toolchain.sh

@@ -23,6 +23,11 @@ build_llvm_clang_cross() {
 	if [[ "${IN_CONTAINER-0}" -ne 1 ]]; then
 		CMAKE_CCACHE="-DLLVM_CCACHE_BUILD:BOOL=ON"
 	fi
+	ELD=""
+	if [[ "${pic}" =~ "ON" ]]; then
+		ELD="-DLLVM_EXTERNAL_PROJECTS=eld \
+		     -DLLVM_EXTERNAL_ELD_SOURCE_DIR=${PWD}/llvm-project/eld"
+	fi
 
 	CC="zig cc --target=${triple}" \
 	ASM="zig cc --target=${triple}" \
@@ -38,6 +43,7 @@ build_llvm_clang_cross() {
 		-DLLVM_INCLUDE_TESTS:BOOL=OFF \
 		-DLLVM_INCLUDE_EXAMPLES:BOOL=OFF \
 		-DLLVM_ENABLE_PIC:BOOL="${pic}" \
+		${ELD} \
 		-DLLVM_NATIVE_TOOL_DIR=${PWD}/obj_llvm/bin \
 		-DCMAKE_BUILD_WITH_INSTALL_RPATH:BOOL=ON \
 		-DCMAKE_CROSSCOMPILING:BOOL=ON \
@@ -71,6 +77,8 @@ build_llvm_clang() {
 		-DLLVM_ENABLE_TERMINFO:BOOL=OFF \
 		-DLLVM_ENABLE_ASSERTIONS:BOOL=ON \
 		-DLLVM_ENABLE_PIC:BOOL=ON \
+		-DLLVM_EXTERNAL_PROJECTS=eld \
+		-DLLVM_EXTERNAL_ELD_SOURCE_DIR=${PWD}/llvm-project/eld \
 		-C ./llvm-project/clang/cmake/caches/hexagon-unknown-linux-musl-clang.cmake \
 		-C ./llvm-project/clang/cmake/caches/hexagon-unknown-linux-musl-clang-cross.cmake \
 		-B ./obj_llvm \
@@ -95,6 +103,7 @@ add_symlinks() {
 		ln -sf --relative ${linkdir}/llvm-ranlib ${linkdir}/${triple}-ranlib
 		ln -sf --relative ${linkdir}/llvm-config ${linkdir}/${triple}-llvm-config
 		ln -sf --relative ${linkdir}/ld.lld ${linkdir}/${triple}-ld.lld
+		ln -sf --relative ${linkdir}/ld.eld ${linkdir}/${triple}-ld.eld
 	done
 
 #	ln -sf --relative ${linkdir}/clang ${linkdir}/hexagon-unknown-none-elf-clang

get-src-repos.sh

@@ -15,6 +15,7 @@ git clone --depth=1 -q https://github.com/python/cpython &
 git clone --depth=1 -q git://repo.or.cz/libc-test &
 git clone -q https://git.busybox.net/busybox/ &
 git clone -q https://github.com/quic/buildroot/ &
+git clone -q https://github.com/qualcomm/eld/ &
 
 
 git clone -q --branch=hexagon https://github.com/quic/musl &

get-src-tarballs.sh

@@ -17,6 +17,14 @@ get_src_tarballs() {
 	echo ${LLVM_SRC_URL} > ${MANIFEST_DIR}/llvm-project.txt
 	cd -
 
+	wget --quiet ${ELD_SRC_URL} -O eld.tar.xz
+	mkdir llvm-project/eld
+	cd llvm-project/eld
+	tar xf ../../eld.tar.xz --strip-components=1
+	rm ../eld.tar.xz
+	echo ${ELD_SRC_URL} > ${MANIFEST_DIR}/eld.txt
+	cd -
+
 	wget --quiet ${LLVM_TESTS_SRC_URL} -O llvm-test-suite.tar.xz
 	mkdir llvm-test-suite
 	cd llvm-test-suite