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#!/usr/bin/bash -eu
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if [ -z "$RPM_BUILD_ROOT" ] || [ "$RPM_BUILD_ROOT" = "/" ]; then
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exit 0
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fi
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CLANG_FLAGS=$@
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NCPUS=${RPM_BUILD_NCPUS:-1}
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check_convert_bitcode () {
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local file_name=$(realpath ${1})
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local file_type=$(file ${file_name})
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shift
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CLANG_FLAGS="$@"
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if [[ "${file_type}" == *"LLVM IR bitcode"* ]]; then
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# Check the output of llvm-strings for the command line, which is in the LLVM bitcode because
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# we pass -frecord-gcc-switches.
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# Check for a line that has "-flto" after (or without) "-fno-lto".
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llvm-strings ${file_name} | while read line ; do
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flto=$(echo $line | grep -o -b -e -flto | tail -n 1 | cut -d : -f 1)
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fnolto=$(echo $line | grep -o -b -e -fno-lto | tail -n 1 | cut -d : -f 1)
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if test -n "$flto" && { test -z "$fnolto" || test "$flto" -gt "$fnolto"; } ; then
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echo "Compiling LLVM bitcode file ${file_name}."
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clang ${CLANG_FLAGS} -fno-lto -Wno-unused-command-line-argument \
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-x ir ${file_name} -c -o ${file_name}
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break
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fi
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done
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elif [[ "${file_type}" == *"current ar archive"* ]]; then
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echo "Unpacking ar archive ${file_name} to check for LLVM bitcode components."
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# create archive stage for objects
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local archive_stage=$(mktemp -d)
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local archive=${file_name}
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pushd ${archive_stage}
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ar x ${archive}
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for archived_file in $(find -not -type d); do
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check_convert_bitcode ${archived_file} ${CLANG_FLAGS}
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echo "Repacking ${archived_file} into ${archive}."
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ar r ${archive} ${archived_file}
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done
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popd
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fi
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}
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echo "Checking for LLVM bitcode artifacts"
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export -f check_convert_bitcode
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find "$RPM_BUILD_ROOT" -type f -name "*.[ao]" -print0 | \
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xargs -0 -r -n1 -P$NCPUS sh -c "check_convert_bitcode \$@ $CLANG_FLAGS" ARG0
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