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Fix build on clang & libc++ #169

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Apr 18, 2022
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Fix build on clang & libc++ #169

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31 changes: 19 additions & 12 deletions clickhouse/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -51,18 +51,25 @@ TARGET_LINK_LIBRARIES (clickhouse-cpp-lib-static
)

IF (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
# there is a problem with __builtin_mul_overflow call at link time
# the error looks like: ... undefined reference to `__muloti4' ...
# caused by clang bug https://bugs.llvm.org/show_bug.cgi?id=16404
# explicit linking to compiler-rt allows to workaround the problem
set (CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} --rtlib=compiler-rt")

# some workaround for linking issues on linux:
# /usr/bin/ld: CMakeFiles/simple-test.dir/main.cpp.o: undefined reference to symbol '_Unwind_Resume@@GCC_3.0'
# /usr/bin/ld: /lib/x86_64-linux-gnu/libgcc_s.so.1: error adding symbols: DSO missing from command line
# FIXME: that workaround breaks clang build on mingw
TARGET_LINK_LIBRARIES (clickhouse-cpp-lib gcc_s)
TARGET_LINK_LIBRARIES (clickhouse-cpp-lib-static gcc_s)
INCLUDE (CheckCXXSourceCompiles)

CHECK_CXX_SOURCE_COMPILES("#include <bits/c++config.h>\nint main() { return __GLIBCXX__ != 0; }"
BUILDING_WITH_LIB_STDCXX)

IF (BUILDING_WITH_LIB_STDCXX)
# there is a problem with __builtin_mul_overflow call at link time
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@Enmk Enmk Apr 13, 2022 •
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Just a wild idea: maybe check if compilation fails when __builtin_mul_overflow is used?

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Yeah it crossed my mind, but what about the other workarounds within the same IF () block ?

# some workaround for linking issues on linux:
# /usr/bin/ld: CMakeFiles/simple-test.dir/main.cpp.o: undefined reference to symbol '_Unwind_Resume@@GCC_3.0'
# /usr/bin/ld: /lib/x86_64-linux-gnu/libgcc_s.so.1: error adding symbols: DSO missing from command line
# FIXME: that workaround breaks clang build on mingw
TARGET_LINK_LIBRARIES (clickhouse-cpp-lib gcc_s)
TARGET_LINK_LIBRARIES (clickhouse-cpp-lib-static gcc_s)

Should I move these into a dedicated IF () / ENDIF () block with a condition on simple-test.dir/main.cpp compilation ?

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yes, please

# the error looks like: ... undefined reference to `__muloti4' ...
# caused by clang bug https://bugs.llvm.org/show_bug.cgi?id=16404
# explicit linking to compiler-rt allows to workaround the problem
SET (CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} --rtlib=compiler-rt")

# some workaround for linking issues on linux:
# /usr/bin/ld: CMakeFiles/simple-test.dir/main.cpp.o: undefined reference to symbol '_Unwind_Resume@@GCC_3.0'
# /usr/bin/ld: /lib/x86_64-linux-gnu/libgcc_s.so.1: error adding symbols: DSO missing from command line
# FIXME: that workaround breaks clang build on mingw
TARGET_LINK_LIBRARIES (clickhouse-cpp-lib gcc_s)
TARGET_LINK_LIBRARIES (clickhouse-cpp-lib-static gcc_s)
ENDIF ()
ENDIF ()

INSTALL (TARGETS clickhouse-cpp-lib clickhouse-cpp-lib-static
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