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CMake: respect system cflags

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Adding optimization level to CMAKE_C_FLAGS is intrusive and problematic
with policies of various distribution.
However, setting "-O2" in CMAKE_CFLAGS_RELEASE is fine and only
affects release build.
This commit is contained in:
hasufell 2014-03-06 15:45:00 +01:00 committed by Paul Bakker
parent e63560470e
commit 69ebf32725
1 changed files with 4 additions and 2 deletions
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6
CMakeLists.txt
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@ -6,14 +6,16 @@ enable_testing()
string(REGEX MATCH "clang" CMAKE_COMPILER_IS_CLANG "${CMAKE_C_COMPILER}")
if(CMAKE_COMPILER_IS_GNUCC)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -O2 -Wall -Wextra -W -Wdeclaration-after-statement")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -W -Wdeclaration-after-statement")
set(CMAKE_C_FLAGS_RELEASE "-O2")
set(CMAKE_C_FLAGS_DEBUG "-g3 -O0")
set(CMAKE_C_FLAGS_COVERAGE "-g3 -O0 -fprofile-arcs -ftest-coverage -lgcov")
set(CMAKE_C_FLAGS_CHECK "${CMAKE_C_FLAGS} -Werror -Wlogical-op -Wwrite-strings")
endif(CMAKE_COMPILER_IS_GNUCC)
if(CMAKE_COMPILER_IS_CLANG)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -O2 -Wall -Wextra -W -Wdeclaration-after-statement")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -W -Wdeclaration-after-statement")
set(CMAKE_C_FLAGS_RELEASE "-O2")
set(CMAKE_C_FLAGS_DEBUG "-g3 -O0")
set(CMAKE_C_FLAGS_CHECK "${CMAKE_C_FLAGS} -Werror -Wpointer-arith -Wwrite-strings -Wdocumentation")
endif(CMAKE_COMPILER_IS_CLANG)