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cmake: Added return/clear variable to function

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Made sure output_variable gets cleared for case where
target compiler is not supported.

Signed-off-by: Noel Eck <noel.eck@intel.com>
This commit is contained in:
Noel Eck 2016-10-26 11:42:20 -07:00
parent e21e05a039
commit 585f2eb331
1 changed files with 28 additions and 28 deletions
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10
CMakeLists.txt
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@ -30,10 +30,13 @@ set (CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules ${CMAKE_MODULE_
# The result of output_variable is set to the sanitized flag name if supported
# or cleared if the flag is not supported.
function (compiler_flag_supported compiler output_variable flag)
# Currently only C and CXX compile flags
# Currently only C and CXX compile flags, clear and return if not supported
if (NOT ${compiler} MATCHES "C|CXX")
message (WARNING "Unknown compiler: ${compiler}")
else ()
set ("${output_variable}" "" PARENT_SCOPE)
return ()
endif (NOT ${compiler} MATCHES "C|CXX")
string (REPLACE "-" "_" SANITIZED_FLAG_NAME "${flag}")
string (REPLACE "/" "_" SANITIZED_FLAG_NAME "${SANITIZED_FLAG_NAME}")
string (REPLACE "=" "_" SANITIZED_FLAG_NAME "${SANITIZED_FLAG_NAME}")
@ -59,7 +62,6 @@ function (compiler_flag_supported compiler output_variable flag)
else ()
set ("${output_variable}" "" PARENT_SCOPE)
endif()
endif()
endfunction ()
include (CheckCCompilerFlag)
@ -85,8 +87,6 @@ function (upm_add_compile_flags compiler)
set (CMAKE_${compiler}_FLAGS ${_TMP_COMPILER_FLAGS} PARENT_SCOPE)
endfunction ()
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
# Compiler flags common to both C and CXX
set (C_CXX_WARNING_FLAGS -Wall)