https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97787
--- Comment #5 from Adrian Bunk <bunk at stusta dot de> --- (In reply to Richard Biener from comment #4) > You can also try to 'reduce' the testcase. Since you are linking a shared > object you can try to strip as many linker inputs as possible and then > reduce the source files. Bisecting does not work when both halves are working, but I now found some clues: $ g++ -flto -shared CMakeFiles/cpp.dir/src/dolfin.cpp.o CMakeFiles/cpp.dir/src/parameter.cpp.o CMakeFiles/cpp.dir/src/adaptivity.cpp.o CMakeFiles/cpp.dir/src/ale.cpp.o CMakeFiles/cpp.dir/src/common.cpp.o CMakeFiles/cpp.dir/src/fem.cpp.o CMakeFiles/cpp.dir/src/function.cpp.o CMakeFiles/cpp.dir/src/generation.cpp.o CMakeFiles/cpp.dir/src/geometry.cpp.o CMakeFiles/cpp.dir/src/graph.cpp.o CMakeFiles/cpp.dir/src/log.cpp.o CMakeFiles/cpp.dir/src/math.cpp.o CMakeFiles/cpp.dir/src/mesh.cpp.o CMakeFiles/cpp.dir/src/multistage.cpp.o CMakeFiles/cpp.dir/src/ts.cpp.o CMakeFiles/cpp.dir/src/io.cpp.o CMakeFiles/cpp.dir/src/la.cpp.o CMakeFiles/cpp.dir/src/nls.cpp.o CMakeFiles/cpp.dir/src/refinement.cpp.o CMakeFiles/cpp.dir/src/MPICommWrapper.cpp.o /usr/bin/ld: /tmp/ccofV1SZ.ltrans32.ltrans.o: .symtab local symbol at index 214 (>= sh_info of 34) /usr/bin/ld: /tmp/ccofV1SZ.ltrans32.ltrans.o: error adding symbols: bad value collect2: error: ld returned 1 exit status $ g++ -flto -shared dolfin.ii parameter.ii adaptivity.ii ale.ii common.ii fem.ii function.ii generation.ii geometry.ii graph.ii log.ii math.ii mesh.ii multistage.ii ts.ii io.ii la.ii nls.ii refinement.ii MPICommWrapper.ii /tmp/ccraiNyo.ltrans9.ltrans.o: in function `std::__exception_ptr::exception_ptr::operator=(std::__exception_ptr::exception_ptr&&)': <artificial>:(.text+0x290): relocation truncated to fit: R_MIPS_CALL16 against `std::__exception_ptr::exception_ptr::~exception_ptr()@@CXXABI_1.3.3' /tmp/ccraiNyo.ltrans9.ltrans.o: in function `std::__cxx11::to_string(int)': <artificial>:(.text+0x414): relocation truncated to fit: R_MIPS_CALL16 against `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(unsigned long, char, std::allocator<char> const&)@@GLIBCXX_3.4.21' <artificial>:(.text+0x42c): relocation truncated to fit: R_MIPS_CALL16 against `std::allocator<char>::~allocator()@@GLIBCXX_3.4' <artificial>:(.text+0x498): relocation truncated to fit: R_MIPS_CALL16 against `std::allocator<char>::~allocator()@@GLIBCXX_3.4' <artificial>:(.text+0x4b0): relocation truncated to fit: R_MIPS_CALL16 against `_Unwind_Resume@@GCC_3.0' <artificial>:(.text+0x4e0): relocation truncated to fit: R_MIPS_CALL16 against `_Unwind_Resume@@GCC_3.0' /tmp/ccraiNyo.ltrans9.ltrans.o: in function `std::__cxx11::to_string(unsigned long)': <artificial>:(.text+0x584): relocation truncated to fit: R_MIPS_CALL16 against `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(unsigned long, char, std::allocator<char> const&)@@GLIBCXX_3.4.21' <artificial>:(.text+0x598): relocation truncated to fit: R_MIPS_CALL16 against `std::allocator<char>::~allocator()@@GLIBCXX_3.4' <artificial>:(.text+0x5c8): relocation truncated to fit: R_MIPS_CALL16 against `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::size() const@@GLIBCXX_3.4.21' <artificial>:(.text+0x610): relocation truncated to fit: R_MIPS_CALL16 against `std::allocator<char>::~allocator()@@GLIBCXX_3.4' <artificial>:(.text+0x628): additional relocation overflows omitted from the output collect2: error: ld returned 1 exit status $ g++ -flto -shared dolfin.ii parameter.ii adaptivity.ii ale.ii common.ii fem.ii function.ii generation.ii geometry.ii graph.ii log.ii math.ii mesh.ii multistage.ii ts.ii io.ii la.ii nls.ii refinement.ii MPICommWrapper.ii -mxgot $ g++ -flto -shared CMakeFiles/cpp.dir/src/dolfin.cpp.o CMakeFiles/cpp.dir/src/parameter.cpp.o CMakeFiles/cpp.dir/src/adaptivity.cpp.o CMakeFiles/cpp.dir/src/ale.cpp.o CMakeFiles/cpp.dir/src/common.cpp.o CMakeFiles/cpp.dir/src/fem.cpp.o CMakeFiles/cpp.dir/src/function.cpp.o CMakeFiles/cpp.dir/src/generation.cpp.o CMakeFiles/cpp.dir/src/geometry.cpp.o CMakeFiles/cpp.dir/src/graph.cpp.o CMakeFiles/cpp.dir/src/log.cpp.o CMakeFiles/cpp.dir/src/math.cpp.o CMakeFiles/cpp.dir/src/mesh.cpp.o CMakeFiles/cpp.dir/src/multistage.cpp.o CMakeFiles/cpp.dir/src/ts.cpp.o CMakeFiles/cpp.dir/src/io.cpp.o CMakeFiles/cpp.dir/src/la.cpp.o CMakeFiles/cpp.dir/src/nls.cpp.o CMakeFiles/cpp.dir/src/refinement.cpp.o CMakeFiles/cpp.dir/src/MPICommWrapper.cpp.o -flto-partition=none $ Adding -mxgot to compiler and linker flags of a normal LTO build does not work, but -flto-partition=none during linking is a workaround.
