Hey having an absolutely miserable time trying to cross compile
libphonenumber, which depends on protobuf, into a static library.
Everything compiles. But fails with undefined symbols at linking time.
this is how I'm building protobuf, on x86 with an x86 protoc that I built
first.
file libraries/protoc
libraries/protoc: Mach-O 64-bit executable x86_64
///////////////////////////////////////////////////////////////////
export build_dir=`pwd`/cpp-build
export darwin=darwin`uname -r`
export protoc=/usr/local/bin/protoc
export isysroot=`xcrun --sdk iphoneos --show-sdk-path`
export cflags="-Wno-unused-local-typedef -Wno-unused-function -DNDEBUG -g
-O3 -pipe -fPIC -fcxx-exceptions"
export cxxflags="$cflags -std=c++17 -stdlib=libc++"
mkdir -p $build_dir/arch
mkdir -p $build_dir/lib
./configure \
--build=x86_64-apple-$darwin \
--host=arm \
--with-protoc=$protoc \
--disable-shared \
--prefix=/usr/local \
"CC=clang" \
"CFLAGS=$cflags -miphoneos-version-min=12.0 -arch arm64 -isysroot
$isysroot" \
"CXX=clang" \
"CXXFLAGS=$cxxflags -miphoneos-version-min=12.0 -arch arm64 -isysroot
$isysroot" \
LDFLAGS="-arch arm64 -miphoneos-version-min=12.0 -stdlib=libc++" \
"LIBS=-lc++ -lc++abi"
make -j8
make install
///////////////////////////////////////////////////////////////////
lipo -info libprotobuf.a
Non-fat file: libprotobuf.a is architecture: arm64
lipo -info Release-iphoneos/libphonenumber.a
Non-fat file: Release-iphoneos/libphonenumber.a is architecture: arm64
Undefined symbols for architecture arm64:
"google::protobuf::internal::LogMessage::operator<<(char const*)",
referenced from:
____ZN13ContactReaper14gatherContactsEv_block_invoke in xxx_lto.o
google::protobuf::internal::ArenaStringPtr::CreateInstance(google::protobuf::Arena*,
std::__1::basic_string<char, std::__1::char_traits<char>,
std::__1::allocator<char> > const*) in xxx_lto.o
"google::protobuf::internal::LogMessage::~LogMessage()", referenced from:
____ZN13ContactReaper14gatherContactsEv_block_invoke in xxx_lto.o
google::protobuf::internal::ArenaStringPtr::CreateInstance(google::protobuf::Arena*,
std::__1::basic_string<char, std::__1::char_traits<char>,
std::__1::allocator<char> > const*) in xxx_lto.o
"google::protobuf::internal::ReadSizeFallback(char const*, unsigned
int)", referenced from:
i18n::phonenumbers::PhoneMetadata::_InternalParse(char const*,
google::protobuf::internal::ParseContext*) in
libphonenumber.a(phonemetadata.pb.o)
i18n::phonenumbers::PhoneMetadataCollection::_InternalParse(char
const*, google::protobuf::internal::ParseContext*) in
libphonenumber.a(phonemetadata.pb.o)
etc... 41 of them.
been at this for 2 days, and for the life of me can't figure out how to fix
it.
has anyone else made it through this alive?
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