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 "${warnCFLAGS} -Wclobbered -Wno-error=clobbered -Wno-unused-local-typedefs -Wno-error=attributes")
27 if (CMAKE_CXX_COMPILER_ID MATCHES "Intel")
28 # ignore remark #1418: external function definition with no prior declaration
29 # 3179: deprecated conversion of string literal to char* (should be const char*)
30 # 191: type qualifier is meaningless on cast type
31 # 597: entity-kind "entity" will not be called for implicit or explicit conversions
32 set(warnCFLAGS "${warnCFLAGS} -wd1418 -wd191 -wd3179 -ww597")
35 set(warnCXXFLAGS "${warnCFLAGS} -Wall -Wextra -Wunused -Wmissing-declarations -Wpointer-arith -Wchar-subscripts -Wcomment -Wformat -Wwrite-strings -Wno-unused-function -Wno-unused-parameter -Wno-strict-aliasing")
36 if(CMAKE_COMPILER_IS_GNUCXX AND (NOT (CMAKE_CXX_COMPILER_VERSION VERSION_LESS "5.0")))
37 set(warnCFLAGS "${warnCFLAGS} -Wformat-signedness")
39 if(CMAKE_CXX_COMPILER_ID MATCHES "Clang|GCC")
40 set(warnCXXFLAGS "${warnCXXFLAGS} -Wno-format-nonliteral")
42 if(CMAKE_COMPILER_IS_GNUCXX)
43 set(warnCXXFLAGS "${warnCXXFLAGS} -Wclobbered -Wno-error=clobbered -Wno-unused-local-typedefs -Wno-error=attributes")
45 if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
46 # don't care about class that become struct, avoid issue of empty C structs
47 # size (coming from libunwind.h)
48 set(warnCXXFLAGS "${warnCXXFLAGS} -Wno-mismatched-tags -Wno-extern-c-compat")
51 # the one specific to C but refused by C++
52 set(warnCFLAGS "${warnCFLAGS} -Wmissing-prototypes")
54 if(CMAKE_Fortran_COMPILER_ID MATCHES "GCC|PGI")
55 set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -Wall")
57 if(CMAKE_Fortran_COMPILER_ID MATCHES "Intel")
58 set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -warn all")
60 set(CMAKE_JAVA_COMPILE_FLAGS "-Xlint")
63 # NDEBUG gives a lot of "initialized but unused variables" errors. Don't die anyway.
64 if(enable_compile_warnings AND enable_debug)
65 set(warnCFLAGS "${warnCFLAGS} -Werror")
66 set(warnCXXFLAGS "${warnCXXFLAGS} -Werror")
69 # Activate the warnings on #if FOOBAR when FOOBAR has no value
70 # It breaks on FreeBSD within Boost headers, so activate this only in Pure Hardcore debug mode.
71 if(enable_maintainer_mode)
72 set(warnCFLAGS "${warnCFLAGS} -Wundef")
73 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wundef")
76 # Se the optimisation flags
77 # NOTE, we should CMAKE_BUILD_TYPE for this
78 if(enable_compile_optimizations)
79 set(optCFLAGS "-O3 -funroll-loops -fno-strict-aliasing ")
83 if(enable_compile_optimizations AND CMAKE_COMPILER_IS_GNUCC
84 AND (NOT enable_model-checking))
85 # This is redundant (already in -03):
86 set(optCFLAGS "${optCFLAGS} -finline-functions ")
89 # Do not leak the current directory into the binaries
90 if(CMAKE_COMPILER_IS_GNUCC)
91 execute_process(COMMAND realpath --relative-to=${CMAKE_BINARY_DIR} ${CMAKE_SOURCE_DIR}
92 RESULT_VARIABLE RESULT OUTPUT_VARIABLE RELATIVE_SOURCE_DIR ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
94 message(STATUS "Relative source directory is \"${RELATIVE_SOURCE_DIR}\".")
96 message(WARNING "Failed to find relative source directory. Using \".\".")
97 set(RELATIVE_SOURCE_DIR ".")
99 set(optCFLAGS "${optCFLAGS} -fdebug-prefix-map=${CMAKE_SOURCE_DIR}=${RELATIVE_SOURCE_DIR}")
103 # NOTE, cmake 3.0 has a INTERPROCEDURAL_OPTIMIZATION target
104 # property for this (http://www.cmake.org/cmake/help/v3.0/prop_tgt/INTERPROCEDURAL_OPTIMIZATION.html)
105 if(enable_lto) # User wants LTO. Try if we can do that
107 if(enable_compile_optimizations
108 AND CMAKE_COMPILER_IS_GNUCC
109 AND (NOT enable_model-checking))
110 # On windows, we need 4.8 or higher to enable lto because of http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50293
111 # We are experiencing assertion failures even with 4.8 on MinGW.
112 # Push the support forward: will see if 4.9 works when we test it.
114 # On Linux, we got the following with GCC 4.8.4 on Centos and Ubuntu
115 # lto1: internal compiler error: in output_die, at dwarf2out.c:8478
116 # Please submit a full bug report, with preprocessed source if appropriate.
117 # So instead, we push the support forward
119 if ( (CMAKE_C_COMPILER_VERSION VERSION_GREATER "4.8.5")
120 AND (LINKER_VERSION VERSION_GREATER "2.22"))
125 message(STATUS "LTO seems usable.")
127 if(NOT enable_compile_optimizations)
128 message(STATUS "LTO disabled: Compile-time optimizations turned off.")
130 if(enable_model-checking)
131 message(STATUS "LTO disabled when compiling with model-checking.")
133 message(STATUS "LTO does not seem usable -- try updating your build chain.")
138 message(STATUS "LTO disabled on the command line.")
140 if(enable_lto) # User wants LTO, and it seems usable. Go for it
141 set(optCFLAGS "${optCFLAGS} -flto ")
142 # See https://gcc.gnu.org/wiki/LinkTimeOptimizationFAQ#ar.2C_nm_and_ranlib:
143 # "Since version 4.9 gcc produces slim object files that only contain
144 # the intermediate representation. In order to handle archives of
145 # these objects you have to use the gcc wrappers:
146 # gcc-ar, gcc-nm and gcc-ranlib."
147 if(${CMAKE_C_COMPILER_ID} STREQUAL "GNU"
148 AND CMAKE_C_COMPILER_VERSION VERSION_GREATER "4.8")
149 set (CMAKE_AR gcc-ar)
150 set (CMAKE_RANLIB gcc-ranlib)
154 if(enable_model-checking AND enable_compile_optimizations)
155 # Forget it, do not optimize the code (because it confuses the MC):
156 set(optCFLAGS "-O0 ")
157 # But you can still optimize this:
159 src/kernel/lmm/fair_bottleneck.cpp src/kernel/lmm/lagrange.cpp src/kernel/lmm/maxmin.cpp
161 src/xbt/log.c src/xbt/xbt_log_appender_file.c
162 src/xbt/xbt_log_layout_format.c src/xbt/xbt_log_layout_simple.c
163 src/xbt/dict.cpp src/xbt/dict_elm.c src/xbt/dict_cursor.c
165 src/xbt/xbt_str.cpp src/xbt/snprintf.c
166 src/xbt/xbt_os_time.c src/xbt/xbt_os_thread.c
167 src/xbt/backtrace_linux.cpp
168 ${MC_SRC_BASE} ${MC_SRC})
169 set (mcCFLAGS "-O3 -funroll-loops -fno-strict-aliasing")
170 if(CMAKE_COMPILER_IS_GNUCC)
171 set (mcCFLAGS "${mcCFLAGS} -finline-functions")
173 set_source_files_properties(${s} PROPERTIES COMPILE_FLAGS ${mcCFLAGS})
177 if (CMAKE_C_COMPILER_ID MATCHES "Intel")
178 # honor parentheses when determining the order of expression evaluation.
179 set(optCFLAGS "${optCFLAGS} -fprotect-parens ")
183 set(CMAKE_C_FLAGS "-DNDEBUG ${CMAKE_C_FLAGS}")
184 set(CMAKE_CXX_FLAGS "-DNDEBUG ${CMAKE_CXX_FLAGS}")
187 set(CMAKE_C_FLAGS "${warnCFLAGS} ${CMAKE_C_FLAGS} ${optCFLAGS}")
188 set(CMAKE_CXX_FLAGS "${warnCXXFLAGS} ${CMAKE_CXX_FLAGS} ${optCFLAGS}")
190 # Try to make Mac a bit more complient to open source standards
191 if(CMAKE_SYSTEM_NAME MATCHES "Darwin")
192 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_XOPEN_SOURCE=700 -D_DARWIN_C_SOURCE")
195 # Avoid a failure seen with gcc 7.2.0 and ns3 3.27
197 set_source_files_properties(src/surf/network_ns3.cpp PROPERTIES COMPILE_FLAGS " -Wno-unused-local-typedef")
202 find_program(GCOV_PATH gcov)
204 set(COVERAGE_COMMAND "${GCOV_PATH}" CACHE TYPE FILEPATH FORCE)
205 set(COVERAGE_EXTRA_FLAGS "-l -p")
206 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DCOVERAGE")
207 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fprofile-arcs -ftest-coverage")
208 set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fprofile-arcs -ftest-coverage")
209 set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -fprofile-arcs -ftest-coverage")
210 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fprofile-arcs -ftest-coverage")
211 add_definitions(-fprofile-arcs -ftest-coverage)
215 if(enable_address_sanitizer)
216 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=address -fno-omit-frame-pointer")
217 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=address -fno-omit-frame-pointer")
218 set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -fsanitize=address")
219 set(TESH_OPTION --enable-sanitizers)
220 try_compile(HAVE_SANITIZE_ADDRESS ${CMAKE_BINARY_DIR} ${CMAKE_HOME_DIRECTORY}/tools/cmake/test_prog/prog_asan.cpp)
221 try_compile(HAVE_SANITIZE_ADDRESS_FIBER_SUPPORT ${CMAKE_BINARY_DIR} ${CMAKE_HOME_DIRECTORY}/tools/cmake/test_prog/prog_asan.cpp
222 COMPILE_DEFINITIONS -DCHECK_FIBER_SUPPORT)
224 set(HAVE_SANITIZE_ADDRESS FALSE CACHE INTERNAL "")
225 set(HAVE_SANITIZE_ADDRESS_FIBER_SUPPORT FALSE CACHE INTERNAL "")
228 if(enable_thread_sanitizer)
229 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=thread -fno-omit-frame-pointer -no-pie")
230 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=thread -fno-omit-frame-pointer -no-pie")
231 set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -fsanitize=thread -no-pie")
234 if(enable_undefined_sanitizer)
235 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=undefined -fno-omit-frame-pointer")
236 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=undefined -fno-omit-frame-pointer")
237 set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -fsanitize=undefined")
240 if(NOT $ENV{CFLAGS} STREQUAL "")
241 message(STATUS "Add CFLAGS: \"$ENV{CFLAGS}\" to CMAKE_C_FLAGS")
242 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} $ENV{CFLAGS}")
245 if(NOT $ENV{CXXFLAGS} STREQUAL "")
246 message(STATUS "Add CXXFLAGS: \"$ENV{CXXFLAGS}\" to CMAKE_CXX_FLAGS")
247 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} $ENV{CXXFLAGS}")
250 if(NOT $ENV{LDFLAGS} STREQUAL "")
251 message(STATUS "Add LDFLAGS: \"$ENV{LDFLAGS}\" to CMAKE_C_LINK_FLAGS")
252 set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} $ENV{LDFLAGS}")
256 # http://stackoverflow.com/questions/10452262/create-64-bit-jni-under-windows
257 # We don't want to ship libgcc_s_seh-1.dll nor libstdc++-6.dll
258 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -static-libgcc")
259 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -static-libgcc -static-libstdc++")
260 set(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_C_FLAGS} -static-libgcc")
261 set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS} -static-libgcc -static-libstdc++")
263 # JNI searches for stdcalls
264 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wl,--add-stdcall-alias")
265 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wl,--add-stdcall-alias")
266 set(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_C_FLAGS} -Wl,--add-stdcall-alias")
267 set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS} -Wl,--add-stdcall-alias")
269 # Specify the data model that we are using (yeah it may help Java)
270 if(CMAKE_SIZEOF_VOID_P EQUAL 4) # 32 bits
271 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -m32")
272 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m32")
274 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -m64")
275 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m64")