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Option to remove warnings on unused return

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By default the compiler sends back all "unused return " messages. To
get rid of all these message  during compilation for prod we have to
use the flag -Wno-unused-result provided here by the option
-WNO-UNUSED

Signed-off-by: g-vidal <gerard.vidal@ens-lyon.fr>

	modified :         CMakeLists.txt
This commit is contained in:
g-vidal 2018-04-17 09:37:15 +02:00
parent 37994c49ad
commit b6bd7fc587
1 changed files with 8 additions and 0 deletions

8
CMakeLists.txt

@ -15,6 +15,7 @@ option (RPM "Generate RPM using CPack" OFF)
option (NPM "Generate NPM/GYP tarballs" OFF)
option (BUILDTESTS "Generate check-ups for upm" OFF)
option (WERROR "Make all warnings into errors." ON)
option (WNO-UNUSED "Remove warnings if return value unused, default is OFF [warnings are printed]" OFF)
# Warn if building in source root
if ("${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_BINARY_DIR}")
@ -104,6 +105,13 @@ if (WERROR)
message (STATUS "Warnings as errors enabled (-Werror), disable with -DWERROR=off")
endif (WERROR)
# Remove Warnings for "unused return" ?
if (WNO-UNUSED)
list (APPEND C_CXX_WARNING_FLAGS -Wno-unused-result)
message (STATUS "Remove compiler warnings regarding unused return values. To remove warnings put the filter on with -DWNO-UNUSED=on")
endif (WNO-UNUSED)
# Set C compiler warning flags at top-level scope and emit a warning about
# unsupported flags
upm_add_compile_flags(C ${C_CXX_WARNING_FLAGS}