Cross-compiling on Linux for Mac failed with CMake parameters
-DCMAKE_BUILD_TYPE=None -DENABLE_CLICKHOUSE_SELF_EXTRACTING=1
-DENABLE_TESTS=0 (see below). This happened e.g. in #51243.
The problem was that ThinLTO enabled/disabled depends on ENABLE_TESTS
(see the top-level CMakeLists.txt). If ENABLE_TESTS=0 then ThinLTO is
activated. On Linux, building/linking works with or without ThinLTO but
on Mac building/linking the self-extracting compressor binary doesn’t
work if ThinLTO is on. This is quite weird, as a workaround restrict
ThinLTO to Linux.
-------
[185/187] Linking CXX static library base/glibc-compatibility/libglibc-compatibility.a
[186/187] Linking CXX static library contrib/zstd-cmake/lib_zstd.a
[187/187] Linking CXX executable utils/self-extracting-executable/pre_compressor
-- Configuring done
-- Generating done
-- Build files have been written to: /home/ubuntu/repo/ch4/build
[0/2] Re-checking globbed directories...
[108/108] Linking CXX executable utils/self-extracting-executable/pre_compressor
FAILED: utils/self-extracting-executable/pre_compressor
: && /usr/bin/clang++-16 --target=x86_64-apple-darwin -std=c++20 -fdiagnostics-color=always -Xclang -fuse-ctor-homing -Wno-enum-constexpr-conversion -fsized-deallocation -gdwarf-aranges -pipe -mssse3 -msse4.1 -msse4.2 -mpclmul -mpopcnt -fasynchronous-unwind-tables -ffile-prefix-map=/home/ubuntu/repo/ch4=. -falign-functions=32 -mbranches-within-32B-boundaries -stdlib=libc++ -fdiagnostics-absolute-paths -fstrict
-vtable-pointers -Wall -Wextra -Wframe-larger-than=65536 -Weverything -Wpedantic -Wno-zero-length-array -Wno-c++98-compat-pedantic -Wno-c++98-compat -Wno-c++20-compat -Wno-sign-conversion -Wno-implicit-int-conversion -Wno-implicit-int-float-conversion -Wno-ctad-maybe-unsupported -Wno-disabled-macro-expansion -Wno-documentation-unknown-command -Wno-double-promotion -Wno-exit-time-destructors -Wno-float-equal -Wn
o-global-constructors -Wno-missing-prototypes -Wno-missing-variable-declarations -Wno-padded -Wno-switch-enum -Wno-undefined-func-template -Wno-unused-template -Wno-vla -Wno-weak-template-vtables -Wno-weak-vtables -Wno-thread-safety-negative -Wno-enum-constexpr-conversion -Wno-unsafe-buffer-usage -O2 -g -DNDEBUG -O3 -g -gdwarf-4 -flto=thin -fwhole-program-vtables -isysroot /home/ubuntu/repo/ch4/cmake/darwin/..
/toolchain/darwin-x86_64 -mmacosx-version-min=10.15 -Wl,-headerpad_max_install_names --ld-path=/home/ubuntu/cctools/bin/x86_64-apple-darwin-ld -rdynamic -Wl,-U,_inside_main -flto=thin -fwhole-program-vtables utils/self-extracting-executable/CMakeFiles/pre_compressor.dir/compressor.cpp.o -o utils/self-extracting-executable/pre_compressor contrib/zstd-cmake/lib_zstd.a contrib/libcxx-cmake/libcxx.a contrib/lib
cxxabi-cmake/libcxxabi.a -nodefaultlibs -lc -lm -lpthread -ldl && :
clang: warning: argument unused during compilation: '-stdlib=libc++' [-Wunused-command-line-argument]
ld: warning: ignoring file utils/self-extracting-executable/CMakeFiles/pre_compressor.dir/compressor.cpp.o, building for macOS-x86_64 but attempting to link with file built for unknown-unsupported file format ( 0xDE 0xC0 0x17 0x0B 0x00 0x00 0x00 0x00 0x14 0x00 0x00 0x00 0x88 0x3E 0x03 0x00 )
ld: warning: ignoring file contrib/zstd-cmake/lib_zstd.a, building for macOS-x86_64 but attempting to link with file built for macOS-x86_64
ld: warning: ignoring file contrib/libcxxabi-cmake/libcxxabi.a, building for macOS-x86_64 but attempting to link with file built for unknown-unsupported file format ( 0x21 0x3C 0x61 0x72 0x63 0x68 0x3E 0x0A 0x23 0x31 0x2F 0x31 0x32 0x20 0x20 0x20 )
ld: warning: ignoring file contrib/libcxx-cmake/libcxx.a, building for macOS-x86_64 but attempting to link with file built for unknown-unsupported file format ( 0x21 0x3C 0x61 0x72 0x63 0x68 0x3E 0x0A 0x23 0x31 0x2F 0x31 0x32 0x20 0x20 0x20 )
Undefined symbols for architecture x86_64:
"_main", referenced from:
implicit entry/start for main executable
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
ninja: build stopped: subcommand failed.
