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b2Args: building libboost<1.81 using clang>15 fails due to no-enum-constexpr-conversion #19

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13 changes: 11 additions & 2 deletions cmake/GetBoostLibB2Args.cmake
Original file line number Diff line number Diff line change
Expand Up @@ -59,10 +59,19 @@ function(get_boots_lib_b2_args)
list(APPEND b2Args address-model=64)
else()
list(APPEND b2Args address-model=32)
endif()
endif()
elseif(APPLE)
string(REGEX MATCH "^([0-9]+)" CLANG_VERSION_MAJOR "${CMAKE_CXX_COMPILER_VERSION}")
list(APPEND b2Args toolset=clang cxxflags=-fPIC cxxflags=-std=c++11 cxxflags=-stdlib=libc++
linkflags=-stdlib=libc++ architecture=combined address-model=32_64 --layout=tagged)
linkflags=-stdlib=libc++ architecture=combined address-model=32_64 --layout=tagged)

# Add workaround flag only if Clang >= 16
# Change mpl::integral_c to boost::integral_constant to avoid Clang 16 errors
string(COMPARE LESS "${req_boost_version}" "1.81.0" boost_is_less_than_181)

if(CLANG_VERSION_MAJOR AND CLANG_VERSION_MAJOR GREATER_EQUAL 16)
list(APPEND b2Args cxxflags=-Wno-enum-constexpr-conversion)
endif()
elseif(UNIX)
list(APPEND b2Args --layout=tagged -sNO_BZIP2=1)
if(ANDROID_BUILD)
Expand Down