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Get Clang to report errors for unused vs. unknown linker flags 

Change-Id: Iabe497d88239c1e15d7ef6d44c6fca79c8be2d1c
Reviewed-on: https://code.wireshark.org/review/13569
Reviewed-by: Guy Harris <guy@alum.mit.edu>
This commit is contained in:
David Morsberger 2016-01-27 20:24:01 -05:00 committed by Guy Harris
parent 1326cbcc42
commit da5594744e
1 changed files with 2 additions and 2 deletions
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4
cmake/modules/CheckCLinkerFlag.cmake
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@ -44,10 +44,10 @@ MACRO (CHECK_C_LINKER_FLAG _FLAG _RESULT)
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
# we may need to pass -Werror=unused-command-line-argument 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")
set(CMAKE_REQUIRED_LIBRARIES "-Werror=unused-command-line-argument")
endif()
set(CMAKE_REQUIRED_LIBRARIES "${CMAKE_REQUIRED_LIBRARIES} ${_FLAG}")
message(status "check linker flag - test linker flags: ${_FLAG}")