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 -Werror")
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 -Werror")
23 if(CMAKE_COMPILER_IS_GNUCXX)
24 set(warnCXXFLAGS "${warnCXXFLAGS} -Wclobbered -Wno-error=clobbered -Wno-unused-local-typedefs -Wno-error=attributes")
26 if (CMAKE_CXX_COMPILER_ID MATCHES "Clang") # don't care about class that become struct
27 set(warnCXXFLAGS "${warnCXXFLAGS} -Wno-mismatched-tags")
30 # the one specific to C but refused by C++
31 set(warnCFLAGS "${warnCFLAGS} -Wmissing-prototypes")
33 set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -Wall")
34 set(CMAKE_JAVA_COMPILE_FLAGS "-Xlint")
37 # Activate the warnings on #if FOOBAR when FOOBAR has no value
38 # It breaks on FreeBSD within Boost headers, so activate this only in Pure Hardcore debug mode.
39 if(enable_maintainer_mode)
40 set(warnCFLAGS "${warnCFLAGS} -Wundef")
41 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wundef")
44 # Se the optimisation flags
45 # NOTE, we should CMAKE_BUILD_TYPE for this
46 if(enable_compile_optimizations)
47 set(optCFLAGS "-O3 -funroll-loops -fno-strict-aliasing ")
51 if(enable_compile_optimizations AND CMAKE_COMPILER_IS_GNUCC
52 AND (NOT enable_model-checking))
53 # This is redundant (already in -03):
54 set(optCFLAGS "${optCFLAGS} -finline-functions ")
58 # NOTE, cmake 3.0 has a INTERPROCEDURAL_OPTIMIZATION target
59 # property for this (http://www.cmake.org/cmake/help/v3.0/prop_tgt/INTERPROCEDURAL_OPTIMIZATION.html)
60 if(enable_lto) # User wants LTO. Try if we can do that
62 if(enable_compile_optimizations
63 AND CMAKE_COMPILER_IS_GNUCC
64 AND (NOT enable_model-checking))
65 # On windows, we need 4.8 or higher to enable lto because of http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50293
66 # We are experiencing assertion failures even with 4.8 on MinGW.
67 # Push the support forward: will see if 4.9 works when we test it.
69 # On Linux, we got the following with GCC 4.8.4 on Centos and Ubuntu
70 # lto1: internal compiler error: in output_die, at dwarf2out.c:8478
71 # Please submit a full bug report, with preprocessed source if appropriate.
72 # So instead, we push the support forward
74 if ( (CMAKE_C_COMPILER_VERSION VERSION_GREATER "4.8")
75 AND (LINKER_VERSION VERSION_GREATER "2.22"))
80 message("-- LTO seems usable.")
82 if(NOT enable_compile_optimizations)
83 message("-- LTO disabled: Compile-time optimizations turned off.")
85 if(enable_model-checking)
86 message("-- LTO disabled when compiling with model-checking.")
88 message("-- LTO does not seem usable -- try updating your build chain.")
93 message("-- LTO disabled on the command line.")
95 if(enable_lto) # User wants LTO, and it seems usable. Go for it
96 set(optCFLAGS "${optCFLAGS} -flto ")
97 # See https://gcc.gnu.org/wiki/LinkTimeOptimizationFAQ#ar.2C_nm_and_ranlib:
98 # "Since version 4.9 gcc produces slim object files that only contain
99 # the intermediate representation. In order to handle archives of
100 # these objects you have to use the gcc wrappers:
101 # gcc-ar, gcc-nm and gcc-ranlib."
102 if(${CMAKE_C_COMPILER_ID} STREQUAL "GNU"
103 AND CMAKE_C_COMPILER_VERSION VERSION_GREATER "4.8")
104 set (CMAKE_AR gcc-ar)
105 set (CMAKE_RANLIB gcc-ranlib)
109 if(enable_model-checking AND enable_compile_optimizations)
110 # Forget it, do not optimize the code (because it confuses the MC):
111 set(optCFLAGS "-O0 ")
112 # But you can still optimize this:
115 src/xbt/log.c src/xbt/xbt_log_appender_file.c
116 src/xbt/xbt_log_layout_format.c src/xbt/xbt_log_layout_simple.c
117 src/xbt/dict.cpp src/xbt/dict_elm.c src/xbt/dict_cursor.c
118 src/xbt/dynar.cpp src/xbt/fifo.c src/xbt/heap.c src/xbt/swag.c
119 src/xbt/str.c src/xbt/strbuff.c src/xbt/snprintf.c
121 src/xbt/xbt_os_time.c src/xbt/xbt_os_thread.c
122 src/xbt/backtrace_linux.c
123 ${MC_SRC_BASE} ${MC_SRC})
124 set (mcCFLAGS "-O3 -funroll-loops -fno-strict-aliasing")
125 if(CMAKE_COMPILER_IS_GNUCC)
126 set (mcCFLAGS "${mcCFLAGS} -finline-functions")
128 set_source_files_properties(${s} PROPERTIES COMPILE_FLAGS ${mcCFLAGS})
133 set(CMAKE_C_FLAGS "-DNDEBUG ${CMAKE_C_FLAGS}")
134 set(CMAKE_CXX_FLAGS "-DNDEBUG ${CMAKE_CXX_FLAGS}")
137 set(CMAKE_C_FLAGS "${warnCFLAGS} ${CMAKE_C_FLAGS} ${optCFLAGS}")
138 set(CMAKE_CXX_FLAGS "${warnCXXFLAGS} ${CMAKE_CXX_FLAGS} ${optCFLAGS}")
140 # Try to make Mac a bit more complient to open source standards
141 if(CMAKE_SYSTEM_NAME MATCHES "Darwin")
142 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_XOPEN_SOURCE=700 -D_DARWIN_C_SOURCE")
147 find_program(GCOV_PATH gcov)
149 set(COVERAGE_COMMAND "${GCOV_PATH}" CACHE TYPE FILEPATH FORCE)
150 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DCOVERAGE")
151 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fprofile-arcs -ftest-coverage")
152 set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fprofile-arcs -ftest-coverage")
153 set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -fprofile-arcs -ftest-coverage")
154 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fprofile-arcs -ftest-coverage")
155 set(TESH_OPTION --enable-coverage)
156 add_definitions(-fprofile-arcs -ftest-coverage)
160 if(NOT $ENV{CFLAGS} STREQUAL "")
161 message(STATUS "Add CFLAGS: \"$ENV{CFLAGS}\" to CMAKE_C_FLAGS")
162 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} $ENV{CFLAGS}")
165 if(NOT $ENV{CXXFLAGS} STREQUAL "")
166 message(STATUS "Add CXXFLAGS: \"$ENV{CXXFLAGS}\" to CMAKE_CXX_FLAGS")
167 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} $ENV{CXXFLAGS}")
170 if(NOT $ENV{LDFLAGS} STREQUAL "")
171 message(STATUS "Add LDFLAGS: \"$ENV{LDFLAGS}\" to CMAKE_C_LINK_FLAGS")
172 set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} $ENV{LDFLAGS}")
176 # http://stackoverflow.com/questions/10452262/create-64-bit-jni-under-windows
177 # We don't want to ship libgcc_s_seh-1.dll nor libstdc++-6.dll
178 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -static-libgcc")
179 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -static-libgcc -static-libstdc++")
180 set(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_C_FLAGS} -static-libgcc")
181 set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS} -static-libgcc -static-libstdc++")
183 # JNI searches for stdcalls
184 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wl,--add-stdcall-alias")
185 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wl,--add-stdcall-alias")
186 set(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_C_FLAGS} -Wl,--add-stdcall-alias")
187 set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS} -Wl,--add-stdcall-alias")
189 # Specify the data model that we are using (yeah it may help Java)
191 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -m32")
192 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m32")
194 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -m64")
195 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m64")