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cmake: add stdlib args for clang build on Linux

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Otherwise linking fails with undefined symbol ... basic_string ... and
libstdc++: DSO not on included in link command.

or with
Host compiler must support std::atomic!
which is due to
undefined reference to `__gxx_personality_v0' and __cxa_begin_catch and
std::terminate()

This was already patched in 7b537a4e94
PR #972 but it got lost, and also needed some tweaking.

Thested with Clan 5.0.1 on Arch Linux (on armv7h).
This commit is contained in:
redfish 2017-10-08 18:32:15 -04:00
parent f2a14047eb
commit 7786c97330
1 changed files with 2 additions and 0 deletions
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2
build/CMakeLists.txt
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@ -184,6 +184,8 @@ if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
elseif (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
# more tweaks
if (NOT (MSVC OR MSYS OR APPLE))
set (CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -stdlib=libstdc++" ) # required for <atomic>
list(APPEND CMAKE_REQUIRED_LIBRARIES "stdc++") # required to link with -stdlib=libstdc++
set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-unused-const-variable -Wno-overloaded-virtual -Wno-c99-extensions" )
endif()
endif ()