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| author | Jacques Germishuys <jacquesg@striata.com> | 2014-04-18 18:32:06 +0200 |
|---|---|---|
| committer | Jacques Germishuys <jacquesg@striata.com> | 2014-04-18 19:09:47 +0200 |
| commit | c6cd3f8bde4aeaad60139dd41a3ed5542dd2ab4f (patch) | |
| tree | ac4ae8617df89374785244be98110dbe1be10ddc /CMakeLists.txt | |
| parent | 48ce93e08fb48cafdd86f626c6a1d4a728942cc8 (diff) | |
| download | libgit2-c6cd3f8bde4aeaad60139dd41a3ed5542dd2ab4f.tar.gz | |
Use CHECK_C_COMPILER_FLAG to determine if the compiler supports a flag
This simplifies platform/compiler dependent checks where we optionally
enable features or disable warnings.
Diffstat (limited to 'CMakeLists.txt')
| -rw-r--r-- | CMakeLists.txt | 50 |
1 files changed, 42 insertions, 8 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt index ebd55b9b9..5a87181b4 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -18,6 +18,7 @@ CMAKE_MINIMUM_REQUIRED(VERSION 2.6) SET(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_LIST_DIR}/cmake/Modules/") INCLUDE(CheckLibraryExists) +INCLUDE(CheckCCompilerFlag) # Build options # @@ -287,7 +288,7 @@ IF (MSVC) # Precompiled headers ELSE () - SET(CMAKE_C_FLAGS "-D_GNU_SOURCE -Wall -Wextra -Wno-missing-field-initializers -Wstrict-aliasing=2 -Wstrict-prototypes -Wdeclaration-after-statement ${CMAKE_C_FLAGS}") + SET(CMAKE_C_FLAGS "-D_GNU_SOURCE -Wall -Wextra ${CMAKE_C_FLAGS}") IF (WIN32 AND NOT CYGWIN) SET(CMAKE_C_FLAGS_DEBUG "-D_DEBUG") @@ -301,16 +302,49 @@ ELSE () ADD_DEFINITIONS(-D__USE_MINGW_ANSI_STDIO=1) ELSEIF (BUILD_SHARED_LIBS) - SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fvisibility=hidden -fPIC") + CHECK_C_COMPILER_FLAG(-fvisibility=hidden HIDDEN_VISIBILITY_FLAG) + IF(HIDDEN_VISIBILITY_FLAG) + SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fvisibility=hidden") + ENDIF() + + SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC") ENDIF () - IF (APPLE) # Apple deprecated OpenSSL + + CHECK_C_COMPILER_FLAG(-Wno-missing-field-initializers NO_MISSING_FIELD_INIT_WARNING) + IF(NO_MISSING_FIELD_INIT_WARNING) + SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-missing-field-initializers") + ENDIF() + + CHECK_C_COMPILER_FLAG(-Wstrict-aliasing STRICT_ALIASING_WARNING) + IF(STRICT_ALIASING_WARNING) + SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wstrict-aliasing=2") + ENDIF() + + CHECK_C_COMPILER_FLAG(-Wstrict-prototypes STRICT_PROTOTYPES_WARNING) + IF(STRICT_PROTOTYPES_WARNING) + SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wstrict-prototypes") + ENDIF() + + CHECK_C_COMPILER_FLAG(-Wdeclaration-after-statement DECLARATION_AFTER_STATEMENT_WARNING) + IF(DECLARATION_AFTER_STATEMENT_WARNING) + SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wdeclaration-after-statement") + ENDIF() + + CHECK_C_COMPILER_FLAG(-Wno-unused-const-variable UNUSED_CONST_VAR_WARNING) + IF(UNUSED_CONST_VAR_WARNING) + SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-unused-const-variable") + ENDIF() + + CHECK_C_COMPILER_FLAG(-Wno-unused-function UNUSED_FUNCTION_WARNING) + IF(UNUSED_FUNCTION_WARNING) + SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-unused-function") + ENDIF() + + CHECK_C_COMPILER_FLAG(-Wno-deprecated-declarations DEPRECATED_DECLARATIONS_WARNING) + IF(DEPRECATED_DECLARATIONS_WARNING) SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-deprecated-declarations") + ENDIF() - # With clang, disable some annoying extra warnings - IF (NOT CMAKE_COMPILER_IS_GNUCC) - SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-unused-const-variable -Wno-unused-function") - ENDIF() - ENDIF () IF (PROFILE) SET(CMAKE_C_FLAGS "-pg ${CMAKE_C_FLAGS}") SET(CMAKE_EXE_LINKER_FLAGS "-pg ${CMAKE_EXE_LINKER_FLAGS}") |