MinGW exe reports libgcc_s_seh-1.dll not found even with -static-libgcc

Question

I'm cross compiling boost::program_options on Linux for Windows using CMake. In CMake I specified

set(Boost_LIBRARIES /usr/local/win64/lib/libboost_program_options.dll)
set(Boost_INCLUDE_DIR /usr/local/win64/incldue)
include_directories(${Boost_INCLUDE_DIR})
target_link_libraries(main.exe -static-libstdc++ -static-libgcc ${Boost_LIBRARIES})

The generated .exe file runs OK on Windows when the first line uses static boost, i.e. libboost_program_options.a. However, when I want to use dynamic boost (in the above code), running the exe on Windows reports missing libgcc_s_seh-1.dll. Why is it looking for it anyway?

Alex Reinking · Answer 1 · 2021-07-08T21:09:15.103

0

The generated .exe file runs OK on Windows when the first line uses static boost, i.e. libboost_program_options.a. However, when I want to use dynamic boost (in the above code), running the exe on Windows reports missing libgcc_s_seh-1.dll. Why is it looking for it anyway?

You've implicitly answered your own question, here: libgcc_s_seh-1.dll is a GCC runtime DLL. Dynamic boost wasn't compiled with -static-libstdc++ -static-libgcc, so it depends on libgcc_s_seh-1.dll. You will have to recompile dynamic boost with these flags.

edited Jul 08 '21 at 21:09

answered Jul 08 '21 at 17:26

Alex Reinking

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So it's the dynamic boost that's looking for libgcc_s_seh-1.dll. How can I solve this problem here? – Xiangcai Jul 08 '21 at 17:40
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Build boost also with `-static-libstdc++ -static-libgcc` – Brecht Sanders Jul 08 '21 at 21:07
@BrechtSanders -- Yup. I thought that was implied in my answer... I'll make it more explicit. – Alex Reinking Jul 08 '21 at 21:08

MinGW exe reports libgcc_s_seh-1.dll not found even with -static-libgcc

1 Answers1