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35 # Test C flags FLAGS, and set VARIABLE to true if the work. Also add the
37 MACRO(GMX_TEST_CFLAG VARIABLE FLAGS CFLAGSVAR)
38 IF(NOT DEFINED ${VARIABLE})
39 CHECK_C_COMPILER_FLAG("${FLAGS}" ${VARIABLE})
42 SET (${CFLAGSVAR} "${FLAGS} ${${CFLAGSVAR}}")
44 ENDMACRO(GMX_TEST_CFLAG VARIABLE FLAGS CFLAGSVAR)
46 # Test C++ flags FLAGS, and set VARIABLE to true if the work. Also add the
47 # flags to CXXFLAGSVAR.
48 MACRO(GMX_TEST_CXXFLAG VARIABLE FLAGS CXXFLAGSVAR)
49 IF(NOT DEFINED ${VARIABLE})
50 CHECK_CXX_COMPILER_FLAG("${FLAGS}" ${VARIABLE})
53 SET (${CXXFLAGSVAR} "${FLAGS} ${${CXXFLAGSVAR}}")
55 ENDMACRO(GMX_TEST_CXXFLAG VARIABLE FLAGS CXXFLAGSVAR)
57 # Set the real CMake variables for compiler flags. This should be a function
58 # so we can have proper local variables while avoiding duplicating code.
59 function(gmx_set_cmake_compiler_flags)
60 foreach(language C CXX)
61 # Copy the flags for the release build type to the build types
62 # that are modified forms of it. Ideally, the list of build
63 # types that are modifications of the Release build type would
64 # be set up elsewhere and passed to this function, but it is
65 # inconvenient in CMake to pass more than one list, and such a
66 # list is only used here.
67 foreach(build_type RELWITHDEBINFO RELWITHASSERT MINSIZEREL PROFILE)
68 set(GMXC_${language}FLAGS_${build_type} "${GMXC_${language}FLAGS_RELEASE}")
70 # Copy the flags that are only used by the real Release build
71 # type. Used for, e.g., -Wno-array-bounds in Release to work around
72 # gcc-4.8 being a little too vocal about some perfectly good code,
73 # while using RelWithAssert (ie. without that suppression) in Jenkins.
74 set(GMXC_${language}FLAGS_RELEASE "${GMXC_${language}FLAGS_RELEASE} ${GMXC_${language}FLAGS_RELEASE_ONLY}")
76 # Modify the real CMake variables for compiler flags for all
77 # builds and language types, and also those common to all
79 foreach(build_type "" ${build_types_with_explicit_flags})
80 if("${build_type}" STREQUAL "")
81 set(punctuation "") # for general compiler flags (e.g.) CMAKE_CXX_FLAGS
83 set(punctuation "_") # for build-type-specific compiler flags (e.g.) CMAKE_CXX_FLAGS_RELEASE
86 # Append to the variables for the given build type for
87 # each language, in the parent scope. We add our new variables at the end, so
88 # compiler-specific choices are more likely to override default CMake choices.
89 # This is for instance useful for RelWithDebInfo builds, where we want to use the full
90 # set of our optimization flags detected in this file, rather than having -O2 override them.
91 set(CMAKE_${language}_FLAGS${punctuation}${build_type}
92 "${CMAKE_${language}_FLAGS${punctuation}${build_type}} ${GMXC_${language}FLAGS${punctuation}${build_type}}"
98 # This is the actual exported function to be called
101 include(CheckCCompilerFlag)
102 include(CheckCXXCompilerFlag)
105 if(CMAKE_COMPILER_IS_GNUCC)
106 #flags are added in reverse order and -Wno* need to appear after -Wall
108 GMX_TEST_CFLAG(CFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CFLAGS)
110 if (GMX_COMPILER_WARNINGS)
111 GMX_TEST_CFLAG(CFLAGS_WARN "-Wall -Wno-unused -Wunused-value -Wunused-parameter" GMXC_CFLAGS)
112 GMX_TEST_CFLAG(CFLAGS_WARN_EXTRA "-Wextra -Wno-missing-field-initializers -Wno-sign-compare -Wpointer-arith" GMXC_CFLAGS)
113 GMX_TEST_CFLAG(CFLAGS_WARN_UNDEF "-Wundef" GMXC_CFLAGS)
114 # Since 4.8 on by default. For previous version disabling is a no-op. Only disabling for Release because with assert
115 # the warnings are OK.
116 GMX_TEST_CFLAG(CFLAGS_WARN_REL "-Wno-array-bounds" GMXC_CFLAGS_RELEASE_ONLY)
118 GMX_TEST_CFLAG(CFLAGS_WARN_SUBSCRIPT "-Wno-char-subscripts" GMXC_CFLAGS)
122 GMX_TEST_CFLAG(CFLAGS_EXCESS_PREC "-fexcess-precision=fast" GMXC_CFLAGS_RELEASE)
123 GMX_TEST_CFLAG(CFLAGS_COPT "-funroll-all-loops"
125 GMX_TEST_CFLAG(CFLAGS_NOINLINE "-fno-inline" GMXC_CFLAGS_DEBUG)
128 if(CMAKE_COMPILER_IS_GNUCXX)
130 GMX_TEST_CXXFLAG(CXXFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CXXFLAGS)
132 if (GMX_COMPILER_WARNINGS)
133 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "-Wall -Wno-unused-function" GMXC_CXXFLAGS)
134 # Problematic with CUDA
135 # GMX_TEST_CXXFLAG(CXXFLAGS_WARN_EFFCXX "-Wnon-virtual-dtor" GMXC_CXXFLAGS)
136 GMX_TEST_CXXFLAG(CXXFLAGS_WARN_EXTRA "-Wextra -Wno-missing-field-initializers -Wpointer-arith" GMXC_CXXFLAGS)
137 # CUDA versions prior to 7.5 come with a header (math_functions.h) which uses the _MSC_VER macro
138 # unconditionally, so we don't use -Wundef for earlier CUDA versions.
139 if(NOT(GMX_GPU AND CUDA_VERSION VERSION_LESS "7.5"))
140 GMX_TEST_CXXFLAG(CXXFLAGS_WARN_UNDEF "-Wundef" GMXC_CXXFLAGS)
142 GMX_TEST_CFLAG(CXXFLAGS_WARN_REL "-Wno-array-bounds" GMXC_CXXFLAGS_RELEASE_ONLY)
145 GMX_TEST_CXXFLAG(CXXFLAGS_EXCESS_PREC "-fexcess-precision=fast" GMXC_CXXFLAGS_RELEASE)
146 GMX_TEST_CXXFLAG(CXXFLAGS_COPT "-funroll-all-loops"
147 GMXC_CXXFLAGS_RELEASE)
148 GMX_TEST_CXXFLAG(CXXFLAGS_NOINLINE "-fno-inline" GMXC_CXXFLAGS_DEBUG)
152 if (CMAKE_C_COMPILER_ID MATCHES "Intel")
155 # 3180: unrecognized OpenMP #pragma
156 GMX_TEST_CFLAG(CFLAGS_PRAGMA "-wd3180" GMXC_CFLAGS)
158 if (GMX_COMPILER_WARNINGS)
159 # 177: function/variable ".." was declared but never referenced
160 # 411: class defines no constructor to initialize the following (incorrect for struct, initializer list works)
161 # 593: variable ".." was set but never used
162 # 981: operands are evaluated in unspecified order
163 #1418: external function definition with no prior declaration
164 #1419: external declaration in primary source file
165 #1572: floating-point equality and inequality comparisons are unreliable
166 #1599: declaration hides variable ".."
167 #2259: non-pointer conversion from ".." to ".." may lose significant bits
168 #2415: variable ".." of static storage duration was declared but never referenced
169 #2547: ".." was specified as both a system and non-system include directory
170 #2557: comparison between signed and unsigned operands
171 #3280: declaration hides member ".."
172 #11074: Inlining inhibited by limit max-size(/max-total-size)
173 #11076: To get full report use -opt-report=3 -opt-report-phase ipo (shown for previous remark)
174 GMX_TEST_CFLAG(CFLAGS_WARN "-w3 -wd177 -wd411 -wd593 -wd981 -wd1418 -wd1419 -wd1572 -wd1599 -wd2259 -wd2415 -wd2547 -wd2557 -wd3280 -wd11074 -wd11076" GMXC_CFLAGS)
176 GMX_TEST_CFLAG(CFLAGS_STDGNU "-std=gnu99" GMXC_CFLAGS)
177 GMX_TEST_CFLAG(CFLAGS_OPT "-ip -funroll-all-loops -alias-const -ansi-alias -no-prec-div -fimf-domain-exclusion=14" GMXC_CFLAGS_RELEASE)
178 GMX_TEST_CFLAG(CFLAGS_DEBUG "-O0" GMXC_CFLAGS_DEBUG) #icc defaults to -O2 even with -g
179 GMX_TEST_CFLAG(CFLAGS_FP_RELASSERT "-fp-model except -fp-model precise" GMXC_CFLAGS_RELWITHASSERT)
182 GMX_TEST_CFLAG(CFLAGS_PRAGMA "/wd3180" GMXC_CFLAGS)
184 if (GMX_COMPILER_WARNINGS)
185 GMX_TEST_CFLAG(CFLAGS_WARN "/W3 /wd177 /wd411 /wd593 /wd981 /wd1418 /wd1419 /wd1572 /wd1599 /wd2259 /wd2415 /wd2547 /wd2557 /wd3280" GMXC_CFLAGS)
187 GMX_TEST_CFLAG(CFLAGS_OPT "/Qip" GMXC_CFLAGS_RELEASE)
191 if (CMAKE_CXX_COMPILER_ID MATCHES "Intel")
194 GMX_TEST_CXXFLAG(CXXFLAGS_PRAGMA "-wd3180" GMXC_CXXFLAGS)
196 if (GMX_COMPILER_WARNINGS)
198 # Suppress warnings from CUDA headers
199 # 7: unrecognized token
200 # 82: storage class is not first
201 # The below are also required for math_functions.h / math_functions.hpp at least until CUDA 8.0-RC
202 # 193: zero used for undefined preprocessing identifer
203 # 3346:dynamic exception specifiers are deprecated
204 GMX_TEST_CXXFLAG(CXXFLAGS_WARN_OLD_GPU "-wd7 -wd82 -wd193 -wd3346" GMXC_CXXFLAGS)
206 #All but the following warnings are identical for the C-compiler (see above)
207 # 383: value copied to temporary, reference to temporary used
208 # 444: destructor for base class ".." is not virtual
209 #2282: unrecognized GCC pragma
210 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "-w3 -wd177 -wd383 -wd411 -wd444 -wd981 -wd1418 -wd1572 -wd1599 -wd2259 -wd3280 -wd11074 -wd11076 -wd2282" GMXC_CXXFLAGS)
212 GMX_TEST_CXXFLAG(CXXFLAGS_OPT "-ip -funroll-all-loops -alias-const -ansi-alias -no-prec-div -fimf-domain-exclusion=14" GMXC_CXXFLAGS_RELEASE)
213 GMX_TEST_CXXFLAG(CXXFLAGS_DEBUG "-O0" GMXC_CXXFLAGS_DEBUG)
214 GMX_TEST_CXXFLAG(CXXFLAGS_FP_RELASSERT "-fp-model except -fp-model precise" GMXC_CXXFLAGS_RELWITHASSERT)
217 GMX_TEST_CXXFLAG(CXXFLAGS_PRAGMA "/wd3180" GMXC_CFLAGS)
219 if (GMX_COMPILER_WARNINGS)
220 #809: exception specification for virtual function X is incompatible with that of overridden function
221 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "/W3 /wd177 /wd383 /wd411 /wd444 /wd809 /wd981 /wd1418 /wd1572 /wd1599 /wd2259 /wd3280 /wd11074 /wd11076 /wd2282" GMXC_CXXFLAGS)
223 GMX_TEST_CXXFLAG(CXXFLAGS_OPT "/Qip" GMXC_CXXFLAGS_RELEASE)
228 # Inter-procedural analysis causes pgcc/pgc++ to crash when linking the library with PGI release 15.7.
229 if (CMAKE_C_COMPILER_ID MATCHES "PGI")
230 GMX_TEST_CFLAG(CFLAGS_OPT "-Mnoipa" GMXC_CFLAGS_RELEASE)
232 if (CMAKE_CXX_COMPILER_ID MATCHES "PGI")
233 # Using ipa exposes internal PGI-15.7 compiler bugs at compile time
234 GMX_TEST_CXXFLAG(CXXFLAGS_OPT "-Mnoipa" GMXC_CXXFLAGS_RELEASE)
235 # PGI identifies itself as GCC, but does not understand the GCC
236 # pragmas that occur in parser.cpp. Since that file is generated
237 # we cannot add a define there, but supress the warning instead.
238 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "--diag_suppress=1675" GMXC_CXXFLAGS)
242 if (CMAKE_C_COMPILER_ID MATCHES "PathScale")
244 GMX_TEST_CFLAG(CFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CFLAGS)
246 if (GMX_COMPILER_WARNINGS)
247 GMX_TEST_CFLAG(CFLAGS_WARN "-Wall -Wno-unused -Wunused-value" GMXC_CFLAGS)
249 GMX_TEST_CFLAG(CFLAGS_OPT "-OPT:Ofast -fno-math-errno -ffast-math"
251 GMX_TEST_CFLAG(CFLAGS_LANG "-std=gnu99" GMXC_CFLAGS)
253 if (CMAKE_CXX_COMPILER_ID MATCHES "PathScale")
255 GMX_TEST_CXXFLAG(CXXFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CXXFLAGS)
257 if (GMX_COMPILER_WARNINGS)
258 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "-Wall -Wno-unused -Wunused-value" GMXC_CXXFLAGS)
260 GMX_TEST_CXXFLAG(CXXFLAGS_OPT "-OPT:Ofast -fno-math-errno -ffast-math"
261 GMXC_CXXFLAGS_RELEASE)
265 # The suppressions below stop
266 # 1500-036: (I) about -O3 causing non-strict IEEE compliance that changes the semantics of the program (duh)
267 # 1500-010: (W) about correct PBC-related use of maximum array indices of DIM-sized C arrays
268 # 1500-030: (I) Additional optimization may be attained by recompiling and specifying MAXMEM option with a value greater than 8192.
269 if (CMAKE_C_COMPILER_ID MATCHES "XL")
270 GMX_TEST_CFLAG(CFLAGS_ARCH "-qarch=auto -qtune=auto" GMXC_CFLAGS)
271 GMX_TEST_CFLAG(CFLAGS_OPT "-O3" GMXC_CFLAGS_RELEASE)
272 GMX_TEST_CFLAG(CFLAGS_LANG "-qlanglvl=extc99" GMXC_CFLAGS)
273 GMX_TEST_CFLAG(CFLAGS_LANG "-qsuppress=1500-036 -qsuppress=1500-010 -qsuppress=1500-030" GMXC_CFLAGS)
275 if (CMAKE_CXX_COMPILER_ID MATCHES "XL")
276 GMX_TEST_CXXFLAG(CXXFLAGS_ARCH "-qarch=auto -qtune=auto" GMXC_CXXFLAGS)
277 GMX_TEST_CXXFLAG(CXXFLAGS_OPT "-O3" GMXC_CXXFLAGS_RELEASE)
278 GMX_TEST_CXXFLAG(CXXFLAGS_LANG "-qsuppress=1500-036 -qsuppress=1500-010 -qsuppress=1500-030" GMXC_CXXFLAGS)
283 # disable warnings for:
284 # forcing value to bool
285 # "this" in initializer list
286 # deprecated (posix, secure) functions
287 # truncation (double -> float)
288 # conversion from 'double' to 'real', possible loss of data
289 # unreferenced local variable (only C)
290 # conversion from 'size_t' to 'int', possible loss of data
291 # conversion from 'const char*' to 'void*', different 'const' qualifiers (only C)
292 if(NOT CMAKE_CONFIGURATION_TYPES)
293 GMX_TEST_CFLAG(CFLAGS_WARN "/wd4800 /wd4355 /wd4996 /wd4305 /wd4244 /wd4101 /wd4267 /wd4090" GMXC_CFLAGS)
294 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "/wd4800 /wd4355 /wd4996 /wd4305 /wd4244 /wd4267" GMXC_CXXFLAGS)
295 else() #Projects only use the C++ flags
296 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "/wd4800 /wd4355 /wd4996 /wd4305 /wd4244 /wd4101 /wd4267 /wd4090" GMXC_CXXFLAGS)
300 if (CMAKE_C_COMPILER_ID MATCHES "Clang")
302 GMX_TEST_CFLAG(CFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CFLAGS)
304 if (GMX_COMPILER_WARNINGS)
305 GMX_TEST_CFLAG(CFLAGS_WARN "-Wall -Wno-unused -Wunused-value -Wunused-parameter" GMXC_CFLAGS)
306 GMX_TEST_CFLAG(CFLAGS_WARN_EXTRA "-Wpointer-arith" GMXC_CFLAGS_EXTRA)
310 if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
312 GMX_TEST_CXXFLAG(CXXFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CXXFLAGS)
314 if (GMX_COMPILER_WARNINGS)
315 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "-Wall -Wno-unused-function" GMXC_CXXFLAGS)
316 GMX_TEST_CXXFLAG(CXXFLAGS_WARN_EXTRA "-Wextra -Wno-missing-field-initializers -Wpointer-arith" GMXC_CXXFLAGS)
317 GMX_TEST_CXXFLAG(CXXFLAGS_DEPRECATED "-Wdeprecated" GMXC_CXXFLAGS)
321 # Fujitsu compilers on PrimeHPC/Sparc64
322 if(${CMAKE_C_COMPILER_ID} MATCHES Fujitsu OR
323 (${CMAKE_C_COMPILER_ID} MATCHES unknown AND ${CMAKE_C_COMPILER} MATCHES ^fcc))
324 GMX_TEST_CFLAG(CFLAG_GNUCOMPAT "-Xg -w" GMXC_CFLAGS)
325 GMX_TEST_CFLAG(CFLAG_OPT "-Kfast,reduction,swp,simd=2,uxsimd,fsimple -x100" GMXC_CFLAGS)
328 if(${CMAKE_CXX_COMPILER_ID} MATCHES Fujitsu OR
329 (${CMAKE_CXX_COMPILER_ID} MATCHES unknown AND ${CMAKE_CXX_COMPILER} MATCHES ^FCC))
330 GMX_TEST_CXXFLAG(CXXFLAG_GNUCOMPAT "-Xg -w" GMXC_CXXFLAGS)
331 GMX_TEST_CXXFLAG(CXXFLAG_OPT "-Kfast,reduction,swp,simd=2,uxsimd,fsimple -x100" GMXC_CXXFLAGS)
334 # now actually set the flags:
335 if (NOT GMX_SKIP_DEFAULT_CFLAGS)
336 gmx_set_cmake_compiler_flags()