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cmake: add stdlib args for clang build on Linux

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).
pull/1109/head
redfish 7 years ago
parent
commit
7786c97330
  1. 2
      build/CMakeLists.txt

2
build/CMakeLists.txt

@ -184,6 +184,8 @@ if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU") @@ -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 ()

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