Change in coreboot[master]: crossgcc: LLVM: Build only useful targets

[Jonathan Neuschäfer (Code Review)]

Jonathan Neuschäfer has uploaded this change for review. ( https://review.coreboot.org/29322

Change subject: crossgcc: LLVM: Build only useful targets
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crossgcc: LLVM: Build only useful targets

LLVM supports a lot of CPU targets. Build only those that we might need.

Note that I didn't enable RISCV yet, because it's marked experimental in
LLVM 6.0. I also didn't enable PowerPC, because coreboot's PowerPC
support is very dysfunctional.

This brings LLVM/clang's contribution to util/crossgcc/xgcc from 1.9 GiB
down to 1.7 GiB.

Change-Id: Ib92a90cd5b13ab84c9f15f1b18cff7a1f513e219
Signed-off-by: Jonathan Neuschäfer 
---
M util/crossgcc/buildgcc
1 file changed, 4 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/22/29322/1

diff --git a/util/crossgcc/buildgcc b/util/crossgcc/buildgcc
index dea42ad..38ed24b 100755
--- a/util/crossgcc/buildgcc
+++ b/util/crossgcc/buildgcc
@@ -864,6 +864,8 @@

build_LLVM() {

+	LLVM_TARGETS="AArch64;ARM;Mips;X86"
+
    cd .. || exit 1
    ln -sf "$PWD/$CFE_DIR"  "$LLVM_DIR/tools/clang"
    ln -sf "$PWD/$CTE_DIR"  "$LLVM_DIR/tools/clang/tools/extra"
@@ -872,7 +874,8 @@

$CMAKE -G "Unix Makefiles" -DCMAKE_INSTALL_PREFIX="$DESTDIR$TARGETDIR" \
    	-DCLANG_VENDOR="coreboot toolchain v$CROSSGCC_VERSION $CROSSGCC_DATE - " \
-		-DCMAKE_BUILD_TYPE=Release ../$LLVM_DIR || touch .failed
+		-DCMAKE_BUILD_TYPE=Release -DLLVM_TARGETS_TO_BUILD="$LLVM_TARGETS" \
+		../$LLVM_DIR || touch .failed
    # shellcheck disable=SC2086
    $MAKE $JOBS || touch .failed
    $MAKE install || touch .failed