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#!/usr/bin/bash -eu
# Initial version:
# https://src.fedoraproject.org/rpms/redhat-rpm-config/blob/rawhide/f/brp-llvm-compile-lto-elf
CLANG_FLAGS=$@
if test -z $P_TO_LLVM; then
echo "P_TO_LLVM isn't set"
exit 1
fi
if test -z $NJOBS; then
echo "NJOBS isn't set"
exit 1
fi
if test -z $VERSION; then
echo "VERSION isn't set"
exit 1
fi
NCPUS=$NJOBS
check_convert_bitcode () {
local file_name=$(realpath ${1})
local file_type=$(file ${file_name})
shift
CLANG_FLAGS="$@"
if [[ "${file_type}" == *"LLVM IR bitcode"* ]]; then
# check for an indication that the bitcode was
# compiled with -flto
${P_TO_LLVM}/debian/tmp/usr/bin/llvm-bcanalyzer-${VERSION} -dump ${file_name} | grep -xP '.*\-flto((?!-fno-lto).)*' 2>&1 > /dev/null
if [ $? -eq 0 ]; then
echo "Compiling LLVM bitcode file ${file_name}."
${P_TO_LLVM}/debian/tmp/usr/bin/clang-${VERSION} -fno-lto -opaque-pointers -Wno-unused-command-line-argument \
-x ir ${file_name} -c -o ${file_name}
fi
elif [[ "${file_type}" == *"current ar archive"* ]]; then
echo "Unpacking ar archive ${file_name} to check for LLVM bitcode components."
# create archive stage for objects
local archive_stage=$(mktemp -d)
local archive=${file_name}
pushd ${archive_stage}
ar x ${archive}
for archived_file in $(find -not -type d); do
check_convert_bitcode ${archived_file} ${CLANG_FLAGS}
echo "Repacking ${archived_file} into ${archive}."
${P_TO_LLVM}/debian/tmp/usr/bin/llvm-ar-${VERSION} r ${archive} ${archived_file}
done
popd
fi
}
echo "Checking for LLVM bitcode artifacts"
export -f check_convert_bitcode
find "$P_TO_LLVM/debian/" -type f -name "*.[ao]" -print0 | \
xargs -0 -r -n1 -P$NCPUS bash -c "check_convert_bitcode \$@ $CLANG_FLAGS" ARG0
|
