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-rw-r--r--CMakeLists.txt11
1 files changed, 10 insertions, 1 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3072ade07..17a492a91 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -104,7 +104,7 @@ option(ENABLE_CURLDEBUG "Set to ON to build with TrackMemory feature enabled" OF
if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_CLANG)
if(PICKY_COMPILER)
- foreach(_CCOPT -pedantic -Wall -W -Wpointer-arith -Wwrite-strings -Wunused -Wshadow -Winline -Wnested-externs -Wmissing-declarations -Wmissing-prototypes -Wno-long-long -Wfloat-equal -Wno-multichar -Wsign-compare -Wundef -Wno-format-nonliteral -Wendif-labels -Wstrict-prototypes -Wdeclaration-after-statement -Wstrict-aliasing=3 -Wcast-align -Wtype-limits -Wold-style-declaration -Wmissing-parameter-type -Wempty-body -Wclobbered -Wignored-qualifiers -Wconversion -Wno-sign-conversion -Wvla -Wdouble-promotion -Wno-system-headers -Wno-pedantic-ms-format)
+ foreach(_CCOPT -pedantic -Wall -W -Wpointer-arith -Wwrite-strings -Wunused -Wshadow -Winline -Wnested-externs -Wmissing-declarations -Wmissing-prototypes -Wfloat-equal -Wsign-compare -Wundef -Wendif-labels -Wstrict-prototypes -Wdeclaration-after-statement -Wstrict-aliasing=3 -Wcast-align -Wtype-limits -Wold-style-declaration -Wmissing-parameter-type -Wempty-body -Wclobbered -Wignored-qualifiers -Wconversion -Wvla -Wdouble-promotion)
# surprisingly, CHECK_C_COMPILER_FLAG needs a new variable to store each new
# test result in.
string(MAKE_C_IDENTIFIER "OPT${_CCOPT}" _optvarname)
@@ -113,6 +113,15 @@ if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_CLANG)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${_CCOPT}")
endif()
endforeach()
+ foreach(_CCOPT long-long multichar format-nonliteral sign-conversion system-headers pedantic-ms-format)
+ # GCC only warns about unknown -Wno- options if there are also other diagnostic messages,
+ # so test for the positive form instead
+ string(MAKE_C_IDENTIFIER "OPT${_CCOPT}" _optvarname)
+ check_c_compiler_flag("-W${_CCOPT}" ${_optvarname})
+ if(${_optvarname})
+ set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-${_CCOPT}")
+ endif()
+ endforeach()
endif()
endif()