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 "${warnCFLAGS} -Wformat-signedness")
21 if(CMAKE_C_COMPILER_ID MATCHES "Clang|GCC")
22 set(warnCFLAGS "${warnCFLAGS} -Wno-format-nonliteral")
24 if(CMAKE_COMPILER_IS_GNUCC)
25 set(warnCFLAGS "${warnCFLAGS} -Wclobbered -Wno-error=clobbered -Wno-unused-local-typedefs -Wno-error=attributes")
28 set(warnCXXFLAGS "${warnCFLAGS} -Wall -Wextra -Wunused -Wmissing-declarations -Wpointer-arith -Wchar-subscripts -Wcomment -Wformat -Wwrite-strings -Wno-unused-function -Wno-unused-parameter -Wno-strict-aliasing")
29 if(CMAKE_COMPILER_IS_GNUCXX AND (NOT (CMAKE_CXX_COMPILER_VERSION VERSION_LESS "5.0")))
30 set(warnCFLAGS "${warnCFLAGS} -Wformat-signedness")
32 if(CMAKE_CXX_COMPILER_ID MATCHES "Clang|GCC")
33 set(warnCXXFLAGS "${warnCXXFLAGS} -Wno-format-nonliteral")
35 if(CMAKE_COMPILER_IS_GNUCXX)
36 set(warnCXXFLAGS "${warnCXXFLAGS} -Wclobbered -Wno-error=clobbered -Wno-unused-local-typedefs -Wno-error=attributes")
38 if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
39 # don't care about class that become struct, avoid issue of empty C structs
40 # size (coming from libunwind.h)
41 set(warnCXXFLAGS "${warnCXXFLAGS} -Wno-mismatched-tags -Wno-extern-c-compat")
44 # the one specific to C but refused by C++
45 set(warnCFLAGS "${warnCFLAGS} -Wmissing-prototypes")
47 if(CMAKE_Fortran_COMPILER_ID MATCHES "GCC|PGI")
48 set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -Wall")
50 if(CMAKE_Fortran_COMPILER_ID MATCHES "Intel")
51 set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -warn all")
53 set(CMAKE_JAVA_COMPILE_FLAGS "-Xlint")
56 # NDEBUG gives a lot of "initialized but unused variables" errors. Don't die anyway.
57 if(enable_compile_warnings AND enable_debug)
58 set(warnCFLAGS "${warnCFLAGS} -Werror")
59 set(warnCXXFLAGS "${warnCXXFLAGS} -Werror")
62 # Activate the warnings on #if FOOBAR when FOOBAR has no value
63 # It breaks on FreeBSD within Boost headers, so activate this only in Pure Hardcore debug mode.
64 if(enable_maintainer_mode)
65 set(warnCFLAGS "${warnCFLAGS} -Wundef")
66 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wundef")
69 # Se the optimisation flags
70 # NOTE, we should CMAKE_BUILD_TYPE for this
71 if(enable_compile_optimizations)
72 set(optCFLAGS "-O3 -funroll-loops -fno-strict-aliasing ")
76 if(enable_compile_optimizations AND CMAKE_COMPILER_IS_GNUCC
77 AND (NOT enable_model-checking))
78 # This is redundant (already in -03):
79 set(optCFLAGS "${optCFLAGS} -finline-functions ")
82 # Do not leak the current directory into the binaries
83 if(CMAKE_COMPILER_IS_GNUCC)
84 execute_process(COMMAND realpath --relative-to=${CMAKE_BINARY_DIR} ${CMAKE_SOURCE_DIR}
85 RESULT_VARIABLE RESULT OUTPUT_VARIABLE RELATIVE_SOURCE_DIR ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
87 message(STATUS "Relative source directory is \"${RELATIVE_SOURCE_DIR}\".")
89 message(WARNING "Failed to find relative source directory. Using \".\".")
90 set(RELATIVE_SOURCE_DIR ".")
92 set(optCFLAGS "${optCFLAGS} -fdebug-prefix-map=${CMAKE_SOURCE_DIR}=${RELATIVE_SOURCE_DIR}")
96 # NOTE, cmake 3.0 has a INTERPROCEDURAL_OPTIMIZATION target
97 # property for this (http://www.cmake.org/cmake/help/v3.0/prop_tgt/INTERPROCEDURAL_OPTIMIZATION.html)
98 if(enable_lto) # User wants LTO. Try if we can do that
100 if(enable_compile_optimizations
101 AND CMAKE_COMPILER_IS_GNUCC
102 AND (NOT enable_model-checking))
103 # On windows, we need 4.8 or higher to enable lto because of http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50293
104 # We are experiencing assertion failures even with 4.8 on MinGW.
105 # Push the support forward: will see if 4.9 works when we test it.
107 # On Linux, we got the following with GCC 4.8.4 on Centos and Ubuntu
108 # lto1: internal compiler error: in output_die, at dwarf2out.c:8478
109 # Please submit a full bug report, with preprocessed source if appropriate.
110 # So instead, we push the support forward
112 if ( (CMAKE_C_COMPILER_VERSION VERSION_GREATER "4.8.5")
113 AND (LINKER_VERSION VERSION_GREATER "2.22"))
118 message(STATUS "LTO seems usable.")
120 if(NOT enable_compile_optimizations)
121 message(STATUS "LTO disabled: Compile-time optimizations turned off.")
123 if(enable_model-checking)
124 message(STATUS "LTO disabled when compiling with model-checking.")
126 message(STATUS "LTO does not seem usable -- try updating your build chain.")
131 message(STATUS "LTO disabled on the command line.")
133 if(enable_lto) # User wants LTO, and it seems usable. Go for it
134 set(optCFLAGS "${optCFLAGS} -flto ")
135 # See https://gcc.gnu.org/wiki/LinkTimeOptimizationFAQ#ar.2C_nm_and_ranlib:
136 # "Since version 4.9 gcc produces slim object files that only contain
137 # the intermediate representation. In order to handle archives of
138 # these objects you have to use the gcc wrappers:
139 # gcc-ar, gcc-nm and gcc-ranlib."
140 if(${CMAKE_C_COMPILER_ID} STREQUAL "GNU"
141 AND CMAKE_C_COMPILER_VERSION VERSION_GREATER "4.8")
142 set (CMAKE_AR gcc-ar)
143 set (CMAKE_RANLIB gcc-ranlib)
147 if(enable_model-checking AND enable_compile_optimizations)
148 # Forget it, do not optimize the code (because it confuses the MC):
149 set(optCFLAGS "-O0 ")
150 # But you can still optimize this:
152 src/kernel/lmm/fair_bottleneck.cpp src/kernel/lmm/lagrange.cpp src/kernel/lmm/maxmin.cpp
154 src/xbt/log.c src/xbt/xbt_log_appender_file.c
155 src/xbt/xbt_log_layout_format.c src/xbt/xbt_log_layout_simple.c
156 src/xbt/dict.cpp src/xbt/dict_elm.c src/xbt/dict_cursor.c
158 src/xbt/xbt_str.cpp src/xbt/snprintf.c
159 src/xbt/xbt_os_time.c src/xbt/xbt_os_thread.c
160 src/xbt/backtrace_linux.cpp
161 ${MC_SRC_BASE} ${MC_SRC})
162 set (mcCFLAGS "-O3 -funroll-loops -fno-strict-aliasing")
163 if(CMAKE_COMPILER_IS_GNUCC)
164 set (mcCFLAGS "${mcCFLAGS} -finline-functions")
166 set_source_files_properties(${s} PROPERTIES COMPILE_FLAGS ${mcCFLAGS})
171 set(CMAKE_C_FLAGS "-DNDEBUG ${CMAKE_C_FLAGS}")
172 set(CMAKE_CXX_FLAGS "-DNDEBUG ${CMAKE_CXX_FLAGS}")
175 set(CMAKE_C_FLAGS "${warnCFLAGS} ${CMAKE_C_FLAGS} ${optCFLAGS}")
176 set(CMAKE_CXX_FLAGS "${warnCXXFLAGS} ${CMAKE_CXX_FLAGS} ${optCFLAGS}")
178 # Try to make Mac a bit more complient to open source standards
179 if(CMAKE_SYSTEM_NAME MATCHES "Darwin")
180 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_XOPEN_SOURCE=700 -D_DARWIN_C_SOURCE")
183 # Avoid a failure seen with gcc 7.2.0 and ns3 3.27
185 set_source_files_properties(src/surf/network_ns3.cpp PROPERTIES COMPILE_FLAGS " -Wno-unused-local-typedef")
190 find_program(GCOV_PATH gcov)
192 set(COVERAGE_COMMAND "${GCOV_PATH}" CACHE TYPE FILEPATH FORCE)
193 set(COVERAGE_EXTRA_FLAGS "-l -p")
194 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DCOVERAGE")
195 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fprofile-arcs -ftest-coverage")
196 set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fprofile-arcs -ftest-coverage")
197 set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -fprofile-arcs -ftest-coverage")
198 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fprofile-arcs -ftest-coverage")
199 add_definitions(-fprofile-arcs -ftest-coverage)
203 if(enable_address_sanitizer)
204 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=address -fno-omit-frame-pointer")
205 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=address -fno-omit-frame-pointer")
206 set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -fsanitize=address")
207 set(TESH_OPTION --enable-sanitizers)
208 try_compile(HAVE_SANITIZE_ADDRESS ${CMAKE_BINARY_DIR} ${CMAKE_HOME_DIRECTORY}/tools/cmake/test_prog/prog_asan.cpp)
209 try_compile(HAVE_SANITIZE_ADDRESS_FIBER_SUPPORT ${CMAKE_BINARY_DIR} ${CMAKE_HOME_DIRECTORY}/tools/cmake/test_prog/prog_asan.cpp
210 COMPILE_DEFINITIONS -DCHECK_FIBER_SUPPORT)
212 set(HAVE_SANITIZE_ADDRESS FALSE CACHE INTERNAL "")
213 set(HAVE_SANITIZE_ADDRESS_FIBER_SUPPORT FALSE CACHE INTERNAL "")
216 if(enable_thread_sanitizer)
217 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=thread -fno-omit-frame-pointer -no-pie")
218 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=thread -fno-omit-frame-pointer -no-pie")
219 set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -fsanitize=thread -no-pie")
222 if(enable_undefined_sanitizer)
223 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=undefined -fno-omit-frame-pointer")
224 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=undefined -fno-omit-frame-pointer")
225 set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -fsanitize=undefined")
228 if(NOT $ENV{CFLAGS} STREQUAL "")
229 message(STATUS "Add CFLAGS: \"$ENV{CFLAGS}\" to CMAKE_C_FLAGS")
230 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} $ENV{CFLAGS}")
233 if(NOT $ENV{CXXFLAGS} STREQUAL "")
234 message(STATUS "Add CXXFLAGS: \"$ENV{CXXFLAGS}\" to CMAKE_CXX_FLAGS")
235 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} $ENV{CXXFLAGS}")
238 if(NOT $ENV{LDFLAGS} STREQUAL "")
239 message(STATUS "Add LDFLAGS: \"$ENV{LDFLAGS}\" to CMAKE_C_LINK_FLAGS")
240 set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} $ENV{LDFLAGS}")
244 # http://stackoverflow.com/questions/10452262/create-64-bit-jni-under-windows
245 # We don't want to ship libgcc_s_seh-1.dll nor libstdc++-6.dll
246 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -static-libgcc")
247 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -static-libgcc -static-libstdc++")
248 set(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_C_FLAGS} -static-libgcc")
249 set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS} -static-libgcc -static-libstdc++")
251 # JNI searches for stdcalls
252 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wl,--add-stdcall-alias")
253 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wl,--add-stdcall-alias")
254 set(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_C_FLAGS} -Wl,--add-stdcall-alias")
255 set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS} -Wl,--add-stdcall-alias")
257 # Specify the data model that we are using (yeah it may help Java)
258 if(CMAKE_SIZEOF_VOID_P EQUAL 4) # 32 bits
259 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -m32")
260 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m32")
262 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -m64")
263 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m64")