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 # 3179: deprecated conversion of string literal to char* (should be const char*)
27 # 191: type qualifier is meaningless on cast type
28 # 597: entity-kind "entity" will not be called for implicit or explicit conversions
29 set(warnCFLAGS "${warnCFLAGS} -wd1418 -wd191 -wd3179 -ww597")
32 set(warnCXXFLAGS "${warnCFLAGS} -Wall -Wextra -Wunused -Wmissing-declarations -Wpointer-arith -Wchar-subscripts -Wcomment -Wformat -Wwrite-strings -Wno-unused-function -Wno-unused-parameter -Wno-strict-aliasing")
33 if(CMAKE_COMPILER_IS_GNUCXX AND (NOT (CMAKE_CXX_COMPILER_VERSION VERSION_LESS "5.0")))
34 set(warnCFLAGS "${warnCFLAGS} -Wformat-signedness")
36 if(CMAKE_COMPILER_IS_GNUCXX)
37 set(warnCXXFLAGS "${warnCXXFLAGS} -Wclobbered -Wno-error=clobbered -Wno-unused-local-typedefs -Wno-error=attributes -Wno-error=maybe-uninitialized")
39 if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
40 # don't care about class that become struct, avoid issue of empty C structs
41 # size (coming from libunwind.h)
42 set(warnCXXFLAGS "${warnCXXFLAGS} -Wno-mismatched-tags -Wno-extern-c-compat")
45 # the one specific to C but refused by C++
46 set(warnCFLAGS "${warnCFLAGS} -Wmissing-prototypes")
48 if(CMAKE_Fortran_COMPILER_ID MATCHES "GCC|PGI")
49 set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -Wall")
51 if(CMAKE_Fortran_COMPILER_ID MATCHES "Intel")
52 set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -warn all")
54 set(CMAKE_JAVA_COMPILE_FLAGS "-Xlint")
57 # NDEBUG gives a lot of "initialized but unused variables" errors. Don't die anyway.
58 if(enable_compile_warnings AND enable_debug)
59 set(warnCFLAGS "${warnCFLAGS} -Werror")
60 set(warnCXXFLAGS "${warnCXXFLAGS} -Werror")
63 # Activate the warnings on #if FOOBAR when FOOBAR has no value
64 # It breaks on FreeBSD within Boost headers, so activate this only in Pure Hardcore debug mode.
65 if(enable_maintainer_mode)
66 set(warnCFLAGS "${warnCFLAGS} -Wundef")
67 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wundef")
70 # Se the optimisation flags
71 # NOTE, we should CMAKE_BUILD_TYPE for this
72 if(enable_compile_optimizations)
73 set(optCFLAGS "-O3 -funroll-loops -fno-strict-aliasing ")
77 if(enable_compile_optimizations AND CMAKE_COMPILER_IS_GNUCC
78 AND (NOT enable_model-checking))
79 # This is redundant (already in -03):
80 set(optCFLAGS "${optCFLAGS} -finline-functions ")
83 # Do not leak the current directory into the binaries
84 if(CMAKE_COMPILER_IS_GNUCC)
85 execute_process(COMMAND realpath --relative-to=${CMAKE_BINARY_DIR} ${CMAKE_SOURCE_DIR}
86 RESULT_VARIABLE RESULT OUTPUT_VARIABLE RELATIVE_SOURCE_DIR ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
88 message(STATUS "Relative source directory is \"${RELATIVE_SOURCE_DIR}\".")
90 message(WARNING "Failed to find relative source directory. Using \".\".")
91 set(RELATIVE_SOURCE_DIR ".")
93 set(optCFLAGS "${optCFLAGS} -fdebug-prefix-map=${CMAKE_SOURCE_DIR}=${RELATIVE_SOURCE_DIR}")
97 # NOTE, cmake 3.0 has a INTERPROCEDURAL_OPTIMIZATION target
98 # property for this (http://www.cmake.org/cmake/help/v3.0/prop_tgt/INTERPROCEDURAL_OPTIMIZATION.html)
99 if(enable_lto) # User wants LTO. Try if we can do that
101 if(enable_compile_optimizations
102 AND CMAKE_COMPILER_IS_GNUCC
103 AND (NOT enable_model-checking))
104 # On windows, we need 4.8 or higher to enable lto because of http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50293
105 # We are experiencing assertion failures even with 4.8 on MinGW.
106 # Push the support forward: will see if 4.9 works when we test it.
108 # On Linux, we got the following with GCC 4.8.4 on Centos and Ubuntu
109 # lto1: internal compiler error: in output_die, at dwarf2out.c:8478
110 # Please submit a full bug report, with preprocessed source if appropriate.
111 # So instead, we push the support forward
113 if ( (CMAKE_C_COMPILER_VERSION VERSION_GREATER "4.8.5")
114 AND (LINKER_VERSION VERSION_GREATER "2.22"))
119 message(STATUS "LTO seems usable.")
121 if(NOT enable_compile_optimizations)
122 message(STATUS "LTO disabled: Compile-time optimizations turned off.")
124 if(enable_model-checking)
125 message(STATUS "LTO disabled when compiling with model-checking.")
127 message(STATUS "LTO does not seem usable -- try updating your build chain.")
132 message(STATUS "LTO disabled on the command line.")
134 if(enable_lto) # User wants LTO, and it seems usable. Go for it
135 set(optCFLAGS "${optCFLAGS} -flto ")
136 # See https://gcc.gnu.org/wiki/LinkTimeOptimizationFAQ#ar.2C_nm_and_ranlib:
137 # "Since version 4.9 gcc produces slim object files that only contain
138 # the intermediate representation. In order to handle archives of
139 # these objects you have to use the gcc wrappers:
140 # gcc-ar, gcc-nm and gcc-ranlib."
141 if(${CMAKE_C_COMPILER_ID} STREQUAL "GNU"
142 AND CMAKE_C_COMPILER_VERSION VERSION_GREATER "4.8")
143 set (CMAKE_AR gcc-ar)
144 set (CMAKE_RANLIB gcc-ranlib)
148 if(enable_model-checking AND enable_compile_optimizations)
149 # Forget it, do not optimize the code (because it confuses the MC):
150 set(optCFLAGS "-O0 ")
151 # But you can still optimize this:
153 src/simix/popping.cpp src/simix/popping_generated.cpp src/simix/smx_global.cpp
154 ${SURF_SRC} ${TRACING_SRC} ${XBT_SRC}
155 ${MC_SRC_BASE} ${MC_SRC})
156 set (mcCFLAGS "-O3 -funroll-loops -fno-strict-aliasing")
157 if(CMAKE_COMPILER_IS_GNUCC)
158 set (mcCFLAGS "${mcCFLAGS} -finline-functions")
160 set_source_files_properties(${s} PROPERTIES COMPILE_FLAGS ${mcCFLAGS})
164 if (CMAKE_C_COMPILER_ID MATCHES "Intel")
165 # honor parentheses when determining the order of expression evaluation.
166 set(optCFLAGS "${optCFLAGS} -fprotect-parens ")
170 set(CMAKE_C_FLAGS "-DNDEBUG ${CMAKE_C_FLAGS}")
171 set(CMAKE_CXX_FLAGS "-DNDEBUG ${CMAKE_CXX_FLAGS}")
174 set(CMAKE_C_FLAGS "${warnCFLAGS} ${CMAKE_C_FLAGS} ${optCFLAGS}")
175 set(CMAKE_CXX_FLAGS "${warnCXXFLAGS} ${CMAKE_CXX_FLAGS} ${optCFLAGS}")
177 # Try to make Mac a bit more complient to open source standards
178 if(CMAKE_SYSTEM_NAME MATCHES "Darwin")
179 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_XOPEN_SOURCE=700 -D_DARWIN_C_SOURCE")
182 # Avoid a failure seen with gcc 7.2.0 and ns3 3.27
184 set_source_files_properties(src/surf/network_ns3.cpp PROPERTIES COMPILE_FLAGS " -Wno-unused-local-typedef")
189 find_program(GCOV_PATH gcov)
191 set(COVERAGE_COMMAND "${GCOV_PATH}" CACHE TYPE FILEPATH FORCE)
192 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DCOVERAGE")
193 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fprofile-arcs -ftest-coverage")
194 set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fprofile-arcs -ftest-coverage")
195 set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -fprofile-arcs -ftest-coverage")
196 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fprofile-arcs -ftest-coverage")
197 add_definitions(-fprofile-arcs -ftest-coverage)
201 if(enable_address_sanitizer)
202 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=address -fno-omit-frame-pointer")
203 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=address -fno-omit-frame-pointer")
204 set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -fsanitize=address")
205 set(TESH_OPTION --enable-sanitizers)
206 try_compile(HAVE_SANITIZER_ADDRESS ${CMAKE_BINARY_DIR} ${CMAKE_HOME_DIRECTORY}/tools/cmake/test_prog/prog_asan.cpp)
207 try_compile(HAVE_SANITIZER_ADDRESS_FIBER_SUPPORT ${CMAKE_BINARY_DIR} ${CMAKE_HOME_DIRECTORY}/tools/cmake/test_prog/prog_asan.cpp
208 COMPILE_DEFINITIONS -DCHECK_FIBER_SUPPORT)
210 set(HAVE_SANITIZER_ADDRESS FALSE CACHE INTERNAL "")
211 set(HAVE_SANITIZER_ADDRESS_FIBER_SUPPORT FALSE CACHE INTERNAL "")
214 if(enable_thread_sanitizer)
215 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=thread -fno-omit-frame-pointer -no-pie")
216 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=thread -fno-omit-frame-pointer -no-pie")
217 set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -fsanitize=thread -no-pie")
218 set(HAVE_SANITIZER_THREAD TRUE CACHE INTERNAL "")
220 set(HAVE_SANITIZER_THREAD FALSE CACHE INTERNAL "")
223 if(enable_undefined_sanitizer)
224 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=undefined -fno-omit-frame-pointer")
225 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=undefined -fno-omit-frame-pointer")
226 set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -fsanitize=undefined")
229 if(NOT $ENV{CFLAGS} STREQUAL "")
230 message(STATUS "Add CFLAGS: \"$ENV{CFLAGS}\" to CMAKE_C_FLAGS")
231 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} $ENV{CFLAGS}")
234 if(NOT $ENV{CXXFLAGS} STREQUAL "")
235 message(STATUS "Add CXXFLAGS: \"$ENV{CXXFLAGS}\" to CMAKE_CXX_FLAGS")
236 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} $ENV{CXXFLAGS}")
239 if(NOT $ENV{LDFLAGS} STREQUAL "")
240 message(STATUS "Add LDFLAGS: \"$ENV{LDFLAGS}\" to CMAKE_C_LINK_FLAGS")
241 set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} $ENV{LDFLAGS}")
245 # http://stackoverflow.com/questions/10452262/create-64-bit-jni-under-windows
246 # We don't want to ship libgcc_s_seh-1.dll nor libstdc++-6.dll
247 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -static-libgcc")
248 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -static-libgcc -static-libstdc++")
249 set(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_C_FLAGS} -static-libgcc")
250 set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS} -static-libgcc -static-libstdc++")
252 # JNI searches for stdcalls
253 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wl,--add-stdcall-alias")
254 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wl,--add-stdcall-alias")
255 set(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_C_FLAGS} -Wl,--add-stdcall-alias")
256 set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS} -Wl,--add-stdcall-alias")
258 # Specify the data model that we are using (yeah it may help Java)
259 if(CMAKE_SIZEOF_VOID_P EQUAL 4) # 32 bits
260 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -m32")
261 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m32")
263 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -m64")
264 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m64")