#!/usr/bin/bash -eu if [ -z "$RPM_BUILD_ROOT" ] || [ "$RPM_BUILD_ROOT" = "/" ]; then exit 0 fi CLANG_FLAGS=$@ NCPUS=${RPM_BUILD_NCPUS:-1} 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 the output of llvm-strings for the command line, which is in the LLVM bitcode because # we pass -frecord-gcc-switches. # Check for a line that has "-flto" after (or without) "-fno-lto". llvm-strings ${file_name} | while read line ; do flto=$(echo $line | grep -o -b -e -flto | tail -n 1 | cut -d : -f 1) fnolto=$(echo $line | grep -o -b -e -fno-lto | tail -n 1 | cut -d : -f 1) if test -n "$flto" && { test -z "$fnolto" || test "$flto" -gt "$fnolto"; } ; then echo "Compiling LLVM bitcode file ${file_name}." clang ${CLANG_FLAGS} -fno-lto -Wno-unused-command-line-argument \ -x ir ${file_name} -c -o ${file_name} break fi done elif [[ "${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}." ar r ${archive} ${archived_file} done popd fi } echo "Checking for LLVM bitcode artifacts" export -f check_convert_bitcode # Deduplicate by device:inode to avoid processing hardlinks in parallel. find "$RPM_BUILD_ROOT" -type f -name "*.[ao]" -printf "%D:%i %p\n" | \ awk '!seen[$1]++' | cut -d" " -f2- | \ xargs -d"\n" -r -n1 -P$NCPUS sh -c "check_convert_bitcode \$@ $CLANG_FLAGS" ARG0