2 ## This file is in charge of setting our paranoid flags with regard to warnings and optimization.
4 ## It is only used for gcc and clang. MSVC builds don't load this file.
6 ## These flags do break some classical CMake tests, so you don't
7 ## want to do so before the very end of the configuration.
9 ## Other compiler flags (C/C++ standard version) are tested and set
10 ## by the beginning of the configuration, directly in ~/CMakeList.txt
16 if(enable_compile_warnings)
17 set(warnCFLAGS "-fno-common -Wall -Wunused -Wmissing-declarations -Wpointer-arith -Wchar-subscripts -Wcomment -Wformat -Wwrite-strings -Wno-unused-function -Wno-unused-parameter -Wno-strict-aliasing")
18 if(CMAKE_COMPILER_IS_GNUCC AND (NOT (CMAKE_C_COMPILER_VERSION VERSION_LESS "5.0")))
19 set(warnCFLAGS "${warnCFLAGS} -Wformat-signedness")
21 if(CMAKE_COMPILER_IS_GNUCC)
22 set(warnCFLAGS "${warnCFLAGS} -Wclobbered -Wno-error=clobbered -Wno-unused-local-typedefs -Wno-error=attributes -Wno-error=maybe-uninitialized")
24 if (CMAKE_CXX_COMPILER_ID MATCHES "Intel")
25 # ignore remark #1418: external function definition with no prior declaration
26 # 2196: routine is both "inline" and "noinline"
27 # 3179: deprecated conversion of string literal to char* (should be const char*)
28 # 191: type qualifier is meaningless on cast type
29 # 597: entity-kind "entity" will not be called for implicit or explicit conversions
30 # 2330: argument of type "type" is incompatible with parameter of type "type" (dropping qualifiers)
31 set(warnCFLAGS "${warnCFLAGS} -wd1418 -wd191 -wd2196 -wd3179 -ww597 -ww2330")
34 set(warnCXXFLAGS "${warnCFLAGS} -Wall -Wextra -Wunused -Wmissing-declarations -Wpointer-arith -Wchar-subscripts -Wcomment -Wformat -Wwrite-strings -Wno-unused-function -Wno-unused-parameter -Wno-strict-aliasing")
35 if(CMAKE_COMPILER_IS_GNUCXX AND (NOT (CMAKE_CXX_COMPILER_VERSION VERSION_LESS "5.0")))
36 set(warnCFLAGS "${warnCFLAGS} -Wformat-signedness")
38 if(CMAKE_COMPILER_IS_GNUCXX)
39 set(warnCXXFLAGS "${warnCXXFLAGS} -Wclobbered -Wno-error=clobbered -Wno-unused-local-typedefs -Wno-error=attributes -Wno-error=maybe-uninitialized")
41 if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
42 # don't care about class that become struct, avoid issue of empty C structs
43 # size (coming from libunwind.h)
44 set(warnCXXFLAGS "${warnCXXFLAGS} -Wno-mismatched-tags -Wno-extern-c-compat")
47 # the one specific to C but refused by C++
48 set(warnCFLAGS "${warnCFLAGS} -Wmissing-prototypes")
50 if(CMAKE_Fortran_COMPILER_ID MATCHES "GCC|PGI")
51 set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -Wall")
52 elseif(CMAKE_Fortran_COMPILER_ID MATCHES "Flang")
53 # flang >= 7 has a bug with common and debug flags. Ignore cmake-added -g in this case.
54 # https://github.com/flang-compiler/flang/issues/671
55 set(CMAKE_Fortran_FLAGS "-Wall")
56 elseif(CMAKE_Fortran_COMPILER_ID MATCHES "Intel")
57 set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -warn all")
59 set(CMAKE_JAVA_COMPILE_FLAGS "-Xlint")
62 # NDEBUG gives a lot of "initialized but unused variables" errors. Don't die anyway.
63 if(enable_compile_warnings AND enable_debug)
64 set(warnCFLAGS "${warnCFLAGS} -Werror")
65 set(warnCXXFLAGS "${warnCXXFLAGS} -Werror")
66 if(CMAKE_Fortran_COMPILER_ID MATCHES "GCC")
67 set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -Werror -Werror=format-security")
71 # Activate the warnings on #if FOOBAR when FOOBAR has no value
72 # It breaks on FreeBSD within Boost headers, so activate this only in Pure Hardcore debug mode.
73 if(enable_maintainer_mode)
74 set(warnCFLAGS "${warnCFLAGS} -Wundef")
75 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wundef")
78 # Se the optimisation flags
79 # NOTE, we should CMAKE_BUILD_TYPE for this
80 if(enable_compile_optimizations)
81 set(optCFLAGS "-O3 -funroll-loops -fno-strict-aliasing ")
85 if(enable_compile_optimizations AND CMAKE_COMPILER_IS_GNUCC
86 AND (NOT enable_model-checking))
87 # This is redundant (already in -03):
88 set(optCFLAGS "${optCFLAGS} -finline-functions ")
91 # Do not leak the current directory into the binaries
92 if(CMAKE_COMPILER_IS_GNUCC)
93 execute_process(COMMAND realpath --relative-to=${CMAKE_BINARY_DIR} ${CMAKE_SOURCE_DIR}
94 RESULT_VARIABLE RESULT OUTPUT_VARIABLE RELATIVE_SOURCE_DIR ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
96 message(STATUS "Relative source directory is \"${RELATIVE_SOURCE_DIR}\".")
98 message(WARNING "Failed to find relative source directory. Using \".\".")
99 set(RELATIVE_SOURCE_DIR ".")
101 if (CMAKE_C_COMPILER_VERSION VERSION_LESS "8.0")
102 set(optCFLAGS "${optCFLAGS} -fdebug-prefix-map=${CMAKE_SOURCE_DIR}=${RELATIVE_SOURCE_DIR}")
104 set(optCFLAGS "${optCFLAGS} -ffile-prefix-map=${CMAKE_SOURCE_DIR}=${RELATIVE_SOURCE_DIR}")
109 if(enable_lto) # User wants LTO. Try if we can do that
111 if(enable_compile_optimizations
112 AND (NOT enable_model-checking))
113 if(CMAKE_VERSION VERSION_LESS "3.9")
114 if ( CMAKE_COMPILER_IS_GNUCC
115 AND (CMAKE_C_COMPILER_VERSION VERSION_GREATER "4.8.5")
116 AND (LINKER_VERSION VERSION_GREATER "2.22"))
120 include(CheckIPOSupported)
121 check_ipo_supported(RESULT ipo)
129 message(STATUS "LTO seems usable.")
131 if(NOT enable_compile_optimizations)
132 message(STATUS "LTO disabled: Compile-time optimizations turned off.")
134 if(enable_model-checking)
135 message(STATUS "LTO disabled when compiling with model-checking.")
137 message(STATUS "LTO does not seem usable -- try updating your build chain.")
142 message(STATUS "LTO disabled on the command line.")
144 if(enable_lto) # User wants LTO, and it seems usable. Go for it
145 set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)
146 # "Since version 4.9 gcc produces slim object files that only contain
147 # the intermediate representation. In order to handle archives of
148 # these objects you have to use the gcc wrappers:
149 # gcc-ar, gcc-nm and gcc-ranlib."
150 if(${CMAKE_C_COMPILER_ID} STREQUAL "GNU"
151 AND CMAKE_C_COMPILER_VERSION VERSION_GREATER "4.8")
152 set (CMAKE_AR gcc-ar)
153 set (CMAKE_RANLIB gcc-ranlib)
157 if(enable_model-checking AND enable_compile_optimizations)
158 # Forget it, do not optimize the code (because it confuses the MC):
159 set(optCFLAGS "-O0 ")
160 # But you can still optimize this:
162 src/simix/popping.cpp src/simix/popping_generated.cpp src/simix/smx_global.cpp
163 ${SURF_SRC} ${TRACING_SRC} ${XBT_SRC}
164 ${MC_SRC_BASE} ${MC_SRC})
165 set (mcCFLAGS "-O3 -funroll-loops -fno-strict-aliasing")
166 if(CMAKE_COMPILER_IS_GNUCC)
167 set (mcCFLAGS "${mcCFLAGS} -finline-functions")
169 set_source_files_properties(${s} PROPERTIES COMPILE_FLAGS ${mcCFLAGS})
173 if (CMAKE_C_COMPILER_ID MATCHES "Intel")
174 # honor parentheses when determining the order of expression evaluation.
175 set(optCFLAGS "${optCFLAGS} -fprotect-parens ")
179 set(CMAKE_C_FLAGS "-DNDEBUG ${CMAKE_C_FLAGS}")
180 set(CMAKE_CXX_FLAGS "-DNDEBUG ${CMAKE_CXX_FLAGS}")
183 set(CMAKE_C_FLAGS "${warnCFLAGS} ${CMAKE_C_FLAGS} ${optCFLAGS}")
184 set(CMAKE_CXX_FLAGS "${warnCXXFLAGS} ${CMAKE_CXX_FLAGS} ${optCFLAGS}")
186 # Try to make Mac a bit more complient to open source standards
187 if(CMAKE_SYSTEM_NAME MATCHES "Darwin")
188 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_XOPEN_SOURCE=700 -D_DARWIN_C_SOURCE")
191 # Avoid a failure seen with gcc 7.2.0 and ns3 3.27
193 set_source_files_properties(src/surf/network_ns3.cpp PROPERTIES COMPILE_FLAGS " -Wno-unused-local-typedef")
198 find_program(GCOV_PATH gcov)
200 set(COVERAGE_COMMAND "${GCOV_PATH}" CACHE TYPE FILEPATH FORCE)
201 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DCOVERAGE")
202 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fprofile-arcs -ftest-coverage")
203 set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fprofile-arcs -ftest-coverage")
204 set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -fprofile-arcs -ftest-coverage")
205 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DCOVERAGE")
206 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fprofile-arcs -ftest-coverage")
207 add_definitions(-fprofile-arcs -ftest-coverage)
211 if(enable_address_sanitizer)
212 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=address -fno-omit-frame-pointer")
213 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=address -fno-omit-frame-pointer")
214 set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -fsanitize=address")
215 set(TESH_OPTION --enable-sanitizers)
216 try_compile(HAVE_SANITIZER_ADDRESS ${CMAKE_BINARY_DIR} ${CMAKE_HOME_DIRECTORY}/tools/cmake/test_prog/prog_asan.cpp)
217 try_compile(HAVE_SANITIZER_ADDRESS_FIBER_SUPPORT ${CMAKE_BINARY_DIR} ${CMAKE_HOME_DIRECTORY}/tools/cmake/test_prog/prog_asan.cpp
218 COMPILE_DEFINITIONS -DCHECK_FIBER_SUPPORT)
220 set(HAVE_SANITIZER_ADDRESS FALSE CACHE INTERNAL "")
221 set(HAVE_SANITIZER_ADDRESS_FIBER_SUPPORT FALSE CACHE INTERNAL "")
224 if(enable_thread_sanitizer)
225 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=thread -fno-omit-frame-pointer -no-pie")
226 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=thread -fno-omit-frame-pointer -no-pie")
227 set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -fsanitize=thread -no-pie")
228 try_compile(HAVE_SANITIZER_THREAD ${CMAKE_BINARY_DIR} ${CMAKE_HOME_DIRECTORY}/tools/cmake/test_prog/prog_tsan.cpp)
229 try_compile(HAVE_SANITIZER_THREAD_FIBER_SUPPORT ${CMAKE_BINARY_DIR} ${CMAKE_HOME_DIRECTORY}/tools/cmake/test_prog/prog_tsan.cpp
230 COMPILE_DEFINITIONS -DCHECK_FIBER_SUPPORT)
232 set(HAVE_SANITIZER_THREAD FALSE CACHE INTERNAL "")
233 set(HAVE_SANITIZER_THREAD_FIBER_SUPPORT FALSE CACHE INTERNAL "")
236 if(enable_undefined_sanitizer)
237 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=undefined -fno-omit-frame-pointer")
238 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=undefined -fno-omit-frame-pointer")
239 set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -fsanitize=undefined")
242 if(NOT $ENV{CFLAGS} STREQUAL "")
243 message(STATUS "Add CFLAGS: \"$ENV{CFLAGS}\" to CMAKE_C_FLAGS")
244 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} $ENV{CFLAGS}")
247 if(NOT $ENV{CXXFLAGS} STREQUAL "")
248 message(STATUS "Add CXXFLAGS: \"$ENV{CXXFLAGS}\" to CMAKE_CXX_FLAGS")
249 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} $ENV{CXXFLAGS}")
252 if(NOT $ENV{LDFLAGS} STREQUAL "")
253 message(STATUS "Add LDFLAGS: \"$ENV{LDFLAGS}\" to CMAKE_C_LINK_FLAGS")
254 set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} $ENV{LDFLAGS}")
258 # http://stackoverflow.com/questions/10452262/create-64-bit-jni-under-windows
259 # We don't want to ship libgcc_s_seh-1.dll nor libstdc++-6.dll
260 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -static-libgcc")
261 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -static-libgcc -static-libstdc++")
262 set(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_C_FLAGS} -static-libgcc")
263 set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS} -static-libgcc -static-libstdc++")
265 # JNI searches for stdcalls
266 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wl,--add-stdcall-alias")
267 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wl,--add-stdcall-alias")
268 set(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_C_FLAGS} -Wl,--add-stdcall-alias")
269 set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS} -Wl,--add-stdcall-alias")
271 # Specify the data model that we are using (yeah it may help Java)
272 if(CMAKE_SIZEOF_VOID_P EQUAL 4) # 32 bits
273 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -m32")
274 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m32")
276 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -m64")
277 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m64")