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Get Clang to report errors for unknown linker flags. 

Change-Id: Id8e77b6b521acc1ba684823211d6c09d0e5c111c
Reviewed-on: https://code.wireshark.org/review/13566
Reviewed-by: Guy Harris <guy@alum.mit.edu>
This commit is contained in:
Guy Harris 2016-01-27 10:27:28 -08:00
parent e57bb1919c
commit 8049df7943
1 changed files with 7 additions and 0 deletions
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7
cmake/modules/CheckCLinkerFlag.cmake
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@ -41,6 +41,13 @@ MACRO (CHECK_C_LINKER_FLAG _FLAG _RESULT)
# passed a flag it doesn't handle.
#
set(CMAKE_REQUIRED_LIBRARIES "/WX")
elseif(CMAKE_C_COMPILER_ID MATCHES "Clang")
#
# We'll be running the linker through the compiler driver, so
# we may need to pass -Werror=unknown-warning-option to have it
# fail, rather than just complaining and driving on, if it's
# passed a flag it doesn't handle.
set(CMAKE_REQUIRED_LIBRARIES "-Werror=unknown-warning-option")
endif()
set(CMAKE_REQUIRED_LIBRARIES "${CMAKE_REQUIRED_LIBRARIES} ${_FLAG}")
message(status "check linker flag - test linker flags: ${_FLAG}")