3 if(FLAGS_ALREADY_INCLUDED)
6 set(FLAGS_ALREADY_INCLUDED 1)
8 # force option /fp:precise for Visual Studio projects.
10 # Note that while this option is default for MSVC compiler, Visual Studio
11 # project can be switched later to use Intel Compiler (ICC).
12 # Enforcing -fp:precise ensures that in such case ICC will use correct
13 # option instead of its default -fp:fast which is harmful for OCCT.
15 set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /fp:precise")
16 set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /fp:precise")
19 # set compiler short name and choose SSE2 option for appropriate MSVC compilers
21 if (NOT CMAKE_SIZEOF_VOID_P EQUAL 8)
22 if (MSVC80 OR MSVC90 OR MSVC10)
23 set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /arch:SSE2")
24 set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /arch:SSE2")
29 add_definitions (-D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_DEPRECATE)
31 set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fexceptions -fPIC")
32 set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fexceptions -fPIC")
33 add_definitions(-DOCC_CONVERT_SIGNALS)
36 # enable structured exceptions for MSVC
37 string (REGEX MATCH "EHsc" ISFLAG "${CMAKE_CXX_FLAGS}")
39 string (REGEX REPLACE "EHsc" "EHa" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
41 set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /EHa")
44 # remove _WINDOWS flag if it exists
45 string (REGEX MATCH "/D_WINDOWS" IS_WINDOWSFLAG "${CMAKE_CXX_FLAGS}")
47 message (STATUS "Info: /D_WINDOWS has been removed from CMAKE_CXX_FLAGS")
48 string (REGEX REPLACE "/D_WINDOWS" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
51 # remove WIN32 flag if it exists
52 string (REGEX MATCH "/DWIN32" IS_WIN32FLAG "${CMAKE_CXX_FLAGS}")
54 message (STATUS "Info: /DWIN32 has been removed from CMAKE_CXX_FLAGS")
55 string (REGEX REPLACE "/DWIN32" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
58 # remove _WINDOWS flag if it exists
59 string (REGEX MATCH "/D_WINDOWS" IS_WINDOWSFLAG "${CMAKE_C_FLAGS}")
61 message (STATUS "Info: /D_WINDOWS has been removed from CMAKE_C_FLAGS")
62 string (REGEX REPLACE "/D_WINDOWS" "" CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
65 # remove WIN32 flag if it exists
66 string (REGEX MATCH "/DWIN32" IS_WIN32FLAG "${CMAKE_C_FLAGS}")
68 message (STATUS "Info: /DWIN32 has been removed from CMAKE_C_FLAGS")
69 string (REGEX REPLACE "/DWIN32" "" CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
72 # remove DEBUG flag if it exists
73 string (REGEX MATCH "-DDEBUG" IS_DEBUG_CXX "${CMAKE_CXX_FLAGS_DEBUG}")
75 message (STATUS "Info: -DDEBUG has been removed from CMAKE_CXX_FLAGS_DEBUG")
76 string (REGEX REPLACE "-DDEBUG" "" CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}")
79 string (REGEX MATCH "-DDEBUG" IS_DEBUG_C "${CMAKE_C_FLAGS_DEBUG}")
81 message (STATUS "Info: -DDEBUG has been removed from CMAKE_C_FLAGS_DEBUG")
82 string (REGEX REPLACE "-DDEBUG" "" CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG}")
84 # enable parallel compilation on MSVC 9 and above
85 if (MSVC AND NOT MSVC70 AND NOT MSVC80)
86 set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MP")
89 # generate a single response file which enlist all of the object files
90 SET(CMAKE_C_USE_RESPONSE_FILE_FOR_OBJECTS 1)
91 SET(CMAKE_CXX_USE_RESPONSE_FILE_FOR_OBJECTS 1)
92 # increase compiler warnings level (-W4 for MSVC, -Wextra for GCC)
94 if (CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
95 string (REGEX REPLACE "/W[0-4]" "/W4" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
97 set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
99 elseif (CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
100 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra")
101 if (BUILD_SHARED_LIBS)
103 set (CMAKE_SHARED_LINKER_FLAGS "-lm ${CMAKE_SHARED_LINKER_FLAGS}")
105 set (CMAKE_SHARED_LINKER_FLAGS "-lm ${CMAKE_SHARED_LINKER_FLAGS}")
111 # Set default release optimization option to O2 instead of O3, since in
112 # some OCCT related examples, this gives significantly smaller binaries
113 # at comparable performace with MinGW-w64.
114 string (REGEX MATCH "-O3" IS_O3_CXX "${CMAKE_CXX_FLAGS_RELEASE}")
116 string (REGEX REPLACE "-O3" "-O2" CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")
118 set (CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O2")
121 set (CMAKE_CXX_FLAGS "-std=gnu++0x ${CMAKE_CXX_FLAGS}")
122 add_definitions(-D_WIN32_WINNT=0x0501)
123 # workaround bugs in mingw with vtable export
124 set (CMAKE_SHARED_LINKER_FLAGS "-Wl,--export-all-symbols")
125 elseif ("x${CMAKE_CXX_COMPILER_ID}" STREQUAL "xClang")
127 # CLang can be used with both libstdc++ and libc++, however on OS X libstdc++ is outdated.
128 set (CMAKE_CXX_FLAGS "-std=c++0x -stdlib=libc++ ${CMAKE_CXX_FLAGS}")
130 set (CMAKE_CXX_FLAGS "-std=c++0x ${CMAKE_CXX_FLAGS}")
132 elseif (DEFINED CMAKE_COMPILER_IS_GNUCXX)
133 set (CMAKE_CXX_FLAGS "-std=c++0x ${CMAKE_CXX_FLAGS}")
136 # Optimize size of binaries
137 if (CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX OR MINGW)
138 set (CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -s")
139 set (CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -s")
142 set (CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -DNo_Exception")
143 set (CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -DNo_Exception")