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 -Wno-format-nonliteral")
18 if(CMAKE_COMPILER_IS_GNUCC)
19 set(warnCFLAGS "${warnCFLAGS} -Wclobbered -Wno-error=clobbered -Wno-unused-local-typedefs -Wno-error=attributes")
22 set(warnCXXFLAGS "${warnCFLAGS} -Wall -Wextra -Wunused -Wmissing-declarations -Wpointer-arith -Wchar-subscripts -Wcomment -Wformat -Wwrite-strings -Wno-unused-function -Wno-unused-parameter -Wno-strict-aliasing -Wno-format-nonliteral")
23 if(CMAKE_COMPILER_IS_GNUCXX)
24 set(warnCXXFLAGS "${warnCXXFLAGS} -Wclobbered -Wno-error=clobbered -Wno-unused-local-typedefs -Wno-error=attributes")
26 if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
27 # don't care about class that become struct, avoid issue of empty C structs
28 # size (coming from libunwind.h)
29 set(warnCXXFLAGS "${warnCXXFLAGS} -Wno-mismatched-tags -Wno-extern-c-compat")
32 # the one specific to C but refused by C++
33 set(warnCFLAGS "${warnCFLAGS} -Wmissing-prototypes")
35 set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -Wall")
36 set(CMAKE_JAVA_COMPILE_FLAGS "-Xlint")
39 # NDEBUG gives a lot of "initialized but unused variables" errors. Don't die anyway.
40 if(enable_compile_warnings AND enable_debug)
41 set(warnCFLAGS "${warnCFLAGS} -Werror")
42 set(warnCXXFLAGS "${warnCXXFLAGS} -Werror")
45 # Activate the warnings on #if FOOBAR when FOOBAR has no value
46 # It breaks on FreeBSD within Boost headers, so activate this only in Pure Hardcore debug mode.
47 if(enable_maintainer_mode)
48 set(warnCFLAGS "${warnCFLAGS} -Wundef")
49 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wundef")
52 # Se the optimisation flags
53 # NOTE, we should CMAKE_BUILD_TYPE for this
54 if(enable_compile_optimizations)
55 set(optCFLAGS "-O3 -funroll-loops -fno-strict-aliasing ")
59 if(enable_compile_optimizations AND CMAKE_COMPILER_IS_GNUCC
60 AND (NOT enable_model-checking))
61 # This is redundant (already in -03):
62 set(optCFLAGS "${optCFLAGS} -finline-functions ")
66 # NOTE, cmake 3.0 has a INTERPROCEDURAL_OPTIMIZATION target
67 # property for this (http://www.cmake.org/cmake/help/v3.0/prop_tgt/INTERPROCEDURAL_OPTIMIZATION.html)
68 if(enable_lto) # User wants LTO. Try if we can do that
70 if(enable_compile_optimizations
71 AND CMAKE_COMPILER_IS_GNUCC
72 AND (NOT enable_model-checking))
73 # On windows, we need 4.8 or higher to enable lto because of http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50293
74 # We are experiencing assertion failures even with 4.8 on MinGW.
75 # Push the support forward: will see if 4.9 works when we test it.
77 # On Linux, we got the following with GCC 4.8.4 on Centos and Ubuntu
78 # lto1: internal compiler error: in output_die, at dwarf2out.c:8478
79 # Please submit a full bug report, with preprocessed source if appropriate.
80 # So instead, we push the support forward
82 if ( (CMAKE_C_COMPILER_VERSION VERSION_GREATER "4.8.5")
83 AND (LINKER_VERSION VERSION_GREATER "2.22"))
88 message("-- LTO seems usable.")
90 if(NOT enable_compile_optimizations)
91 message("-- LTO disabled: Compile-time optimizations turned off.")
93 if(enable_model-checking)
94 message("-- LTO disabled when compiling with model-checking.")
96 message("-- LTO does not seem usable -- try updating your build chain.")
101 message("-- LTO disabled on the command line.")
103 if(enable_lto) # User wants LTO, and it seems usable. Go for it
104 set(optCFLAGS "${optCFLAGS} -flto ")
105 # See https://gcc.gnu.org/wiki/LinkTimeOptimizationFAQ#ar.2C_nm_and_ranlib:
106 # "Since version 4.9 gcc produces slim object files that only contain
107 # the intermediate representation. In order to handle archives of
108 # these objects you have to use the gcc wrappers:
109 # gcc-ar, gcc-nm and gcc-ranlib."
110 if(${CMAKE_C_COMPILER_ID} STREQUAL "GNU"
111 AND CMAKE_C_COMPILER_VERSION VERSION_GREATER "4.8")
112 set (CMAKE_AR gcc-ar)
113 set (CMAKE_RANLIB gcc-ranlib)
117 if(enable_model-checking AND enable_compile_optimizations)
118 # Forget it, do not optimize the code (because it confuses the MC):
119 set(optCFLAGS "-O0 ")
120 # But you can still optimize this:
123 src/xbt/log.c src/xbt/xbt_log_appender_file.c
124 src/xbt/xbt_log_layout_format.c src/xbt/xbt_log_layout_simple.c
125 src/xbt/dict.cpp src/xbt/dict_elm.c src/xbt/dict_cursor.c
126 src/xbt/dynar.cpp src/xbt/fifo.c src/xbt/heap.c src/xbt/swag.c
127 src/xbt/str.c src/xbt/strbuff.c src/xbt/snprintf.c
129 src/xbt/xbt_os_time.c src/xbt/xbt_os_thread.c
130 src/xbt/backtrace_linux.c
131 ${MC_SRC_BASE} ${MC_SRC})
132 set (mcCFLAGS "-O3 -funroll-loops -fno-strict-aliasing")
133 if(CMAKE_COMPILER_IS_GNUCC)
134 set (mcCFLAGS "${mcCFLAGS} -finline-functions")
136 set_source_files_properties(${s} PROPERTIES COMPILE_FLAGS ${mcCFLAGS})
141 set(CMAKE_C_FLAGS "-DNDEBUG ${CMAKE_C_FLAGS}")
142 set(CMAKE_CXX_FLAGS "-DNDEBUG ${CMAKE_CXX_FLAGS}")
145 set(CMAKE_C_FLAGS "${warnCFLAGS} ${CMAKE_C_FLAGS} ${optCFLAGS}")
146 set(CMAKE_CXX_FLAGS "${warnCXXFLAGS} ${CMAKE_CXX_FLAGS} ${optCFLAGS}")
148 # Try to make Mac a bit more complient to open source standards
149 if(CMAKE_SYSTEM_NAME MATCHES "Darwin")
150 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_XOPEN_SOURCE=700 -D_DARWIN_C_SOURCE")
155 find_program(GCOV_PATH gcov)
157 set(COVERAGE_COMMAND "${GCOV_PATH}" CACHE TYPE FILEPATH FORCE)
158 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DCOVERAGE")
159 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fprofile-arcs -ftest-coverage")
160 set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fprofile-arcs -ftest-coverage")
161 set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -fprofile-arcs -ftest-coverage")
162 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fprofile-arcs -ftest-coverage")
163 set(TESH_OPTION --enable-coverage)
164 add_definitions(-fprofile-arcs -ftest-coverage)
168 if(enable_address_sanitizer)
169 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=address -fno-omit-frame-pointer")
170 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=address -fno-omit-frame-pointer")
171 set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -fsanitize=address")
172 set(TESH_OPTION --enable-sanitizers)
175 if(enable_thread_sanitizer)
176 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=thread -fno-omit-frame-pointer")
177 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=thread -fno-omit-frame-pointer")
178 set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -fsanitize=thread")
181 if(enable_undefined_sanitizer)
182 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=undefined -fno-omit-frame-pointer")
183 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=undefined -fno-omit-frame-pointer")
184 set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -fsanitize=undefined")
187 if(NOT $ENV{CFLAGS} STREQUAL "")
188 message(STATUS "Add CFLAGS: \"$ENV{CFLAGS}\" to CMAKE_C_FLAGS")
189 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} $ENV{CFLAGS}")
192 if(NOT $ENV{CXXFLAGS} STREQUAL "")
193 message(STATUS "Add CXXFLAGS: \"$ENV{CXXFLAGS}\" to CMAKE_CXX_FLAGS")
194 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} $ENV{CXXFLAGS}")
197 if(NOT $ENV{LDFLAGS} STREQUAL "")
198 message(STATUS "Add LDFLAGS: \"$ENV{LDFLAGS}\" to CMAKE_C_LINK_FLAGS")
199 set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} $ENV{LDFLAGS}")
203 # http://stackoverflow.com/questions/10452262/create-64-bit-jni-under-windows
204 # We don't want to ship libgcc_s_seh-1.dll nor libstdc++-6.dll
205 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -static-libgcc")
206 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -static-libgcc -static-libstdc++")
207 set(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_C_FLAGS} -static-libgcc")
208 set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS} -static-libgcc -static-libstdc++")
210 # JNI searches for stdcalls
211 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wl,--add-stdcall-alias")
212 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wl,--add-stdcall-alias")
213 set(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_C_FLAGS} -Wl,--add-stdcall-alias")
214 set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS} -Wl,--add-stdcall-alias")
216 # Specify the data model that we are using (yeah it may help Java)
217 if(CMAKE_SIZEOF_VOID_P EQUAL 4) # 32 bits
218 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -m32")
219 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m32")
221 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -m64")
222 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m64")