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compiler-rt: Add option to automate install process

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Also mention that compiler-rt can be needed to build code using
`__builtin_available()`.

Fixes #278.
This commit is contained in:
Rémi Verschelde 2021-07-12 13:34:32 +02:00
parent 447cf3b3ea
commit b875d7c136
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GPG Key ID: C3336907360768E1
3 changed files with 31 additions and 9 deletions
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4
README.COMPILER-RT.md
View File

@ -10,6 +10,10 @@ Ensure you have finished `build.sh`,
then run: `./build_compiler_rt.sh`.
By default, installation steps for compiler-rt will be printed to the terminal
to run manually, but you can automate the installation process by defining
`ENABLE_COMPILER_RT_INSTALL`.
You can verify compiler-rt is working by invoking the following command:
echo "int main(void){return 0;}" | xcrun clang -xc -o/dev/null -v - 2>&1 | \

3
README.md
View File

@ -33,6 +33,9 @@ It also includes scripts for optionally building
* the "compiler-rt" runtime library, and
* the `llvm-dsymutil` tool required for debugging.
Note: The "compiler-rt" library can be needed to link code that uses the
`__builtin_available()` runtime version check.
### WHAT CAN BE BUILT WITH IT? ###

33
build_compiler_rt.sh
View File

@ -182,22 +182,39 @@ fi
rm -f $BUILD_DIR/.compiler-rt_build_complete
# Installation. Can be either automated (ENABLE_COMPILER_RT_INSTALL) or will
# print the commands that the user should run manually.
function print_or_run() {
if [ -z "$ENABLE_COMPILER_RT_INSTALL" ]; then
echo "$@"
else
$@
fi
}
echo ""
echo ""
echo ""
echo "Please run the following commands by hand to install compiler-rt:"
if [ -z "$ENABLE_COMPILER_RT_INSTALL" ]; then
echo "Please run the following commands by hand to install compiler-rt:"
else
echo "Installing compiler-rt headers and libraries to the following paths:"
echo " ${CLANG_INCLUDE_DIR}"
echo " ${CLANG_DARWIN_LIB_DIR}"
fi
echo ""
echo "mkdir -p ${CLANG_INCLUDE_DIR}"
echo "mkdir -p ${CLANG_DARWIN_LIB_DIR}"
echo "cp -rv $BUILD_DIR/compiler-rt/compiler-rt/include/sanitizer ${CLANG_INCLUDE_DIR}"
print_or_run mkdir -p ${CLANG_INCLUDE_DIR}
print_or_run mkdir -p ${CLANG_DARWIN_LIB_DIR}
print_or_run cp -rv $BUILD_DIR/compiler-rt/compiler-rt/include/sanitizer ${CLANG_INCLUDE_DIR}
if [ $USE_CMAKE -eq 1 ]; then
### CMAKE ###
echo "cp -v $BUILD_DIR/compiler-rt/compiler-rt/build/lib/darwin/*.a ${CLANG_DARWIN_LIB_DIR}"
echo "cp -v $BUILD_DIR/compiler-rt/compiler-rt/build/lib/darwin/*.dylib ${CLANG_DARWIN_LIB_DIR}"
print_or_run cp -v $BUILD_DIR/compiler-rt/compiler-rt/build/lib/darwin/*.a ${CLANG_DARWIN_LIB_DIR}
print_or_run cp -v $BUILD_DIR/compiler-rt/compiler-rt/build/lib/darwin/*.dylib ${CLANG_DARWIN_LIB_DIR}
### CMAKE END ###
@ -209,7 +226,7 @@ else
function print_install_command() {
if [ -f "$1" ]; then
echo "cp $PWD/compiler-rt/$1 ${CLANG_DARWIN_LIB_DIR}/$2"
print_or_run cp $PWD/compiler-rt/$1 ${CLANG_DARWIN_LIB_DIR}/$2
fi
}
@ -219,14 +236,12 @@ else
print_install_command "cc_kext/libcompiler_rt.a" "libclang_rt.cc_kext.a"
print_install_command "profile_osx/libcompiler_rt.a" "libclang_rt.profile_osx.a"
print_install_command "ubsan_osx_dynamic/libcompiler_rt.dylib" \
"libclang_rt.ubsan_osx_dynamic.dylib"
print_install_command "asan_osx_dynamic/libcompiler_rt.dylib" \
"libclang_rt.asan_osx_dynamic.dylib"
popd &>/dev/null
### MAKE END ###