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 "${warnCFLAGS} -Wclobbered -Wno-error=clobbered -Wno-unused-local-typedefs -Wno-error=attributes")
27 if (CMAKE_CXX_COMPILER_ID MATCHES "Intel")
28 # ignore remark #1418: external function definition with no prior declaration
29 # 3179: deprecated conversion of string literal to char* (should be const char*)
30 # 191: type qualifier is meaningless on cast type
31 set(warnCFLAGS "${warnCFLAGS} -wd1418 -wd191 -wd3179")
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_CXX_COMPILER_ID MATCHES "Clang|GCC")
39 set(warnCXXFLAGS "${warnCXXFLAGS} -Wno-format-nonliteral")
41 if(CMAKE_COMPILER_IS_GNUCXX)
42 set(warnCXXFLAGS "${warnCXXFLAGS} -Wclobbered -Wno-error=clobbered -Wno-unused-local-typedefs -Wno-error=attributes")
44 if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
45 # don't care about class that become struct, avoid issue of empty C structs
46 # size (coming from libunwind.h)
47 set(warnCXXFLAGS "${warnCXXFLAGS} -Wno-mismatched-tags -Wno-extern-c-compat")
50 # the one specific to C but refused by C++
51 set(warnCFLAGS "${warnCFLAGS} -Wmissing-prototypes")
53 if(CMAKE_Fortran_COMPILER_ID MATCHES "GCC|PGI")
54 set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -Wall")
56 if(CMAKE_Fortran_COMPILER_ID MATCHES "Intel")
57 set(CMAKE_Fortran_FLAGS "${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")
68 # Activate the warnings on #if FOOBAR when FOOBAR has no value
69 # It breaks on FreeBSD within Boost headers, so activate this only in Pure Hardcore debug mode.
70 if(enable_maintainer_mode)
71 set(warnCFLAGS "${warnCFLAGS} -Wundef")
72 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wundef")
75 # Se the optimisation flags
76 # NOTE, we should CMAKE_BUILD_TYPE for this
77 if(enable_compile_optimizations)
78 set(optCFLAGS "-O3 -funroll-loops -fno-strict-aliasing ")
82 if(enable_compile_optimizations AND CMAKE_COMPILER_IS_GNUCC
83 AND (NOT enable_model-checking))
84 # This is redundant (already in -03):
85 set(optCFLAGS "${optCFLAGS} -finline-functions ")
88 # Do not leak the current directory into the binaries
89 if(CMAKE_COMPILER_IS_GNUCC)
90 execute_process(COMMAND realpath --relative-to=${CMAKE_BINARY_DIR} ${CMAKE_SOURCE_DIR}
91 RESULT_VARIABLE RESULT OUTPUT_VARIABLE RELATIVE_SOURCE_DIR ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
93 message(STATUS "Relative source directory is \"${RELATIVE_SOURCE_DIR}\".")
95 message(WARNING "Failed to find relative source directory. Using \".\".")
96 set(RELATIVE_SOURCE_DIR ".")
98 set(optCFLAGS "${optCFLAGS} -fdebug-prefix-map=${CMAKE_SOURCE_DIR}=${RELATIVE_SOURCE_DIR}")
102 # NOTE, cmake 3.0 has a INTERPROCEDURAL_OPTIMIZATION target
103 # property for this (http://www.cmake.org/cmake/help/v3.0/prop_tgt/INTERPROCEDURAL_OPTIMIZATION.html)
104 if(enable_lto) # User wants LTO. Try if we can do that
106 if(enable_compile_optimizations
107 AND CMAKE_COMPILER_IS_GNUCC
108 AND (NOT enable_model-checking))
109 # On windows, we need 4.8 or higher to enable lto because of http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50293
110 # We are experiencing assertion failures even with 4.8 on MinGW.
111 # Push the support forward: will see if 4.9 works when we test it.
113 # On Linux, we got the following with GCC 4.8.4 on Centos and Ubuntu
114 # lto1: internal compiler error: in output_die, at dwarf2out.c:8478
115 # Please submit a full bug report, with preprocessed source if appropriate.
116 # So instead, we push the support forward
118 if ( (CMAKE_C_COMPILER_VERSION VERSION_GREATER "4.8.5")
119 AND (LINKER_VERSION VERSION_GREATER "2.22"))
124 message(STATUS "LTO seems usable.")
126 if(NOT enable_compile_optimizations)
127 message(STATUS "LTO disabled: Compile-time optimizations turned off.")
129 if(enable_model-checking)
130 message(STATUS "LTO disabled when compiling with model-checking.")
132 message(STATUS "LTO does not seem usable -- try updating your build chain.")
137 message(STATUS "LTO disabled on the command line.")
139 if(enable_lto) # User wants LTO, and it seems usable. Go for it
140 set(optCFLAGS "${optCFLAGS} -flto ")
141 # See https://gcc.gnu.org/wiki/LinkTimeOptimizationFAQ#ar.2C_nm_and_ranlib:
142 # "Since version 4.9 gcc produces slim object files that only contain
143 # the intermediate representation. In order to handle archives of
144 # these objects you have to use the gcc wrappers:
145 # gcc-ar, gcc-nm and gcc-ranlib."
146 if(${CMAKE_C_COMPILER_ID} STREQUAL "GNU"
147 AND CMAKE_C_COMPILER_VERSION VERSION_GREATER "4.8")
148 set (CMAKE_AR gcc-ar)
149 set (CMAKE_RANLIB gcc-ranlib)
153 if(enable_model-checking AND enable_compile_optimizations)
154 # Forget it, do not optimize the code (because it confuses the MC):
155 set(optCFLAGS "-O0 ")
156 # But you can still optimize this:
158 src/kernel/lmm/fair_bottleneck.cpp src/kernel/lmm/lagrange.cpp src/kernel/lmm/maxmin.cpp
160 src/xbt/log.c src/xbt/xbt_log_appender_file.c
161 src/xbt/xbt_log_layout_format.c src/xbt/xbt_log_layout_simple.c
162 src/xbt/dict.cpp src/xbt/dict_elm.c src/xbt/dict_cursor.c
164 src/xbt/xbt_str.cpp src/xbt/snprintf.c
165 src/xbt/xbt_os_time.c src/xbt/xbt_os_thread.c
166 src/xbt/backtrace_linux.cpp
167 ${MC_SRC_BASE} ${MC_SRC})
168 set (mcCFLAGS "-O3 -funroll-loops -fno-strict-aliasing")
169 if(CMAKE_COMPILER_IS_GNUCC)
170 set (mcCFLAGS "${mcCFLAGS} -finline-functions")
172 set_source_files_properties(${s} PROPERTIES COMPILE_FLAGS ${mcCFLAGS})
177 set(CMAKE_C_FLAGS "-DNDEBUG ${CMAKE_C_FLAGS}")
178 set(CMAKE_CXX_FLAGS "-DNDEBUG ${CMAKE_CXX_FLAGS}")
181 set(CMAKE_C_FLAGS "${warnCFLAGS} ${CMAKE_C_FLAGS} ${optCFLAGS}")
182 set(CMAKE_CXX_FLAGS "${warnCXXFLAGS} ${CMAKE_CXX_FLAGS} ${optCFLAGS}")
184 # Try to make Mac a bit more complient to open source standards
185 if(CMAKE_SYSTEM_NAME MATCHES "Darwin")
186 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_XOPEN_SOURCE=700 -D_DARWIN_C_SOURCE")
189 # Avoid a failure seen with gcc 7.2.0 and ns3 3.27
191 set_source_files_properties(src/surf/network_ns3.cpp PROPERTIES COMPILE_FLAGS " -Wno-unused-local-typedef")
196 find_program(GCOV_PATH gcov)
198 set(COVERAGE_COMMAND "${GCOV_PATH}" CACHE TYPE FILEPATH FORCE)
199 set(COVERAGE_EXTRA_FLAGS "-l -p")
200 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DCOVERAGE")
201 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fprofile-arcs -ftest-coverage")
202 set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fprofile-arcs -ftest-coverage")
203 set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -fprofile-arcs -ftest-coverage")
204 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fprofile-arcs -ftest-coverage")
205 add_definitions(-fprofile-arcs -ftest-coverage)
209 if(enable_address_sanitizer)
210 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=address -fno-omit-frame-pointer")
211 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=address -fno-omit-frame-pointer")
212 set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -fsanitize=address")
213 set(TESH_OPTION --enable-sanitizers)
214 try_compile(HAVE_SANITIZE_ADDRESS ${CMAKE_BINARY_DIR} ${CMAKE_HOME_DIRECTORY}/tools/cmake/test_prog/prog_asan.cpp)
215 try_compile(HAVE_SANITIZE_ADDRESS_FIBER_SUPPORT ${CMAKE_BINARY_DIR} ${CMAKE_HOME_DIRECTORY}/tools/cmake/test_prog/prog_asan.cpp
216 COMPILE_DEFINITIONS -DCHECK_FIBER_SUPPORT)
218 set(HAVE_SANITIZE_ADDRESS FALSE CACHE INTERNAL "")
219 set(HAVE_SANITIZE_ADDRESS_FIBER_SUPPORT FALSE CACHE INTERNAL "")
222 if(enable_thread_sanitizer)
223 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=thread -fno-omit-frame-pointer -no-pie")
224 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=thread -fno-omit-frame-pointer -no-pie")
225 set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -fsanitize=thread -no-pie")
228 if(enable_undefined_sanitizer)
229 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=undefined -fno-omit-frame-pointer")
230 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=undefined -fno-omit-frame-pointer")
231 set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -fsanitize=undefined")
234 if(NOT $ENV{CFLAGS} STREQUAL "")
235 message(STATUS "Add CFLAGS: \"$ENV{CFLAGS}\" to CMAKE_C_FLAGS")
236 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} $ENV{CFLAGS}")
239 if(NOT $ENV{CXXFLAGS} STREQUAL "")
240 message(STATUS "Add CXXFLAGS: \"$ENV{CXXFLAGS}\" to CMAKE_CXX_FLAGS")
241 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} $ENV{CXXFLAGS}")
244 if(NOT $ENV{LDFLAGS} STREQUAL "")
245 message(STATUS "Add LDFLAGS: \"$ENV{LDFLAGS}\" to CMAKE_C_LINK_FLAGS")
246 set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} $ENV{LDFLAGS}")
250 # http://stackoverflow.com/questions/10452262/create-64-bit-jni-under-windows
251 # We don't want to ship libgcc_s_seh-1.dll nor libstdc++-6.dll
252 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -static-libgcc")
253 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -static-libgcc -static-libstdc++")
254 set(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_C_FLAGS} -static-libgcc")
255 set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS} -static-libgcc -static-libstdc++")
257 # JNI searches for stdcalls
258 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wl,--add-stdcall-alias")
259 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wl,--add-stdcall-alias")
260 set(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_C_FLAGS} -Wl,--add-stdcall-alias")
261 set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS} -Wl,--add-stdcall-alias")
263 # Specify the data model that we are using (yeah it may help Java)
264 if(CMAKE_SIZEOF_VOID_P EQUAL 4) # 32 bits
265 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -m32")
266 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m32")
268 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -m64")
269 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m64")