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error in BoostDetectToolset #33

Closed ZR233 closed 4 years ago

ZR233 commented 5 years ago

when using cmake find_package, the output is: -- Boost toolset is mgw8 (GNU 8.1.0) -- Including D:/Boost/lib/cmake/boost_system-1.70.0/libboost_system-variant-mgw81-mt-d-x64-1_70-static.cmake -- ... skipped libboost_system-mgw81-mt-d-x64-1_70.a (mgw81, detected mgw8, set Boost_COMPILER to override) CMake Error at D:/Boost/lib/cmake/Boost-1.70.0/BoostConfig.cmake:95 (find_package): Found package configuration file:

D:/Boost/lib/cmake/boost_system-1.70.0/boost_system-config.cmake

I found:

elseif(MINGW)

set(BOOST_DETECTED_TOOLSET "mgw")

if(_BOOST_COMPILER_VERSION_MAJOR GREATER 4) set(_BOOST_COMPILER_VERSION_MINOR) endif()

in BoostDetectToolset-1.70.0.cmake ，this led to errors.

iliis commented 5 years ago

I've stumpled across a very similar issue with clang. Cmake detects Boost toolset is clang8 (Clang 8.0), but then fails to include my library that was built with clang instead of clang8:

... skipped libboost_filesystem-clang-mt-a64-1_70.a (clang, detected clang8, set Boost_COMPILER to override)
iliis commented 5 years ago

https://github.com/boostorg/boost_install/commit/9967d60ec1a6eaa8a4781f61f87d621a89b605a9 fixes the logic around Boost_COMPILER, so you can at least work around this issue by manually setting the compiler identification string (e.g. set -DBoost_COMPILER=mgw81 in your case)

ashwinpn commented 4 years ago

I have had this issue before, you could try to set the compiler identification string manually, it worked for me.

pdimov commented 4 years ago

This was an error in Boost.Build; mgw8 was actually correct, and mgw81 was wrong. It should be fixed in the next release by https://github.com/boostorg/build/pull/524. For now, setting Boost_COMPILER manually should work around the issue.