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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" 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 -Wmissing-declarations" 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 # -w3 enables a lot of useful diagnostics but we don't care about all. -wd disables some selectively.
160 # 177: function/variable ".." was declared but never referenced
161 # 411: class defines no constructor to initialize the following (incorrect for struct, initializer list works)
162 # 593: variable ".." was set but never used
163 # 981: operands are evaluated in unspecified order
164 #1418: external function definition with no prior declaration
165 #1419: external declaration in primary source file
166 #1572: floating-point equality and inequality comparisons are unreliable
167 #1599: declaration hides variable ".."
168 #2259: non-pointer conversion from ".." to ".." may lose significant bits
169 #2415: variable ".." of static storage duration was declared but never referenced
170 #2547: ".." was specified as both a system and non-system include directory
171 #2557: comparison between signed and unsigned operands
172 #3280: declaration hides member ".."
173 #11074: Inlining inhibited by limit max-size(/max-total-size)
174 #11076: To get full report use -opt-report=3 -opt-report-phase ipo (shown for previous remark)
175 GMX_TEST_CFLAG(CFLAGS_WARN "-w3 -wd177 -wd411 -wd593 -wd981 -wd1418 -wd1419 -wd1572 -wd1599 -wd2259 -wd2415 -wd2547 -wd2557 -wd3280 -wd11074 -wd11076" GMXC_CFLAGS)
177 GMX_TEST_CFLAG(CFLAGS_STDGNU "-std=gnu99" GMXC_CFLAGS)
178 GMX_TEST_CFLAG(CFLAGS_OPT "-ip -funroll-all-loops -alias-const -ansi-alias -no-prec-div -fimf-domain-exclusion=14" GMXC_CFLAGS_RELEASE)
179 GMX_TEST_CFLAG(CFLAGS_DEBUG "-O0" GMXC_CFLAGS_DEBUG) #icc defaults to -O2 even with -g
180 GMX_TEST_CFLAG(CFLAGS_FP_RELASSERT "-fp-model except -fp-model precise" GMXC_CFLAGS_RELWITHASSERT)
183 GMX_TEST_CFLAG(CFLAGS_PRAGMA "/wd3180" GMXC_CFLAGS)
185 if (GMX_COMPILER_WARNINGS)
186 GMX_TEST_CFLAG(CFLAGS_WARN "/W3 /wd177 /wd411 /wd593 /wd981 /wd1418 /wd1419 /wd1572 /wd1599 /wd2259 /wd2415 /wd2547 /wd2557 /wd3280" GMXC_CFLAGS)
188 GMX_TEST_CFLAG(CFLAGS_OPT "/Qip" GMXC_CFLAGS_RELEASE)
192 if (CMAKE_CXX_COMPILER_ID MATCHES "Intel")
195 GMX_TEST_CXXFLAG(CXXFLAGS_PRAGMA "-wd3180" GMXC_CXXFLAGS)
197 if (GMX_COMPILER_WARNINGS)
199 # Suppress warnings from CUDA headers
200 # 7: unrecognized token
201 # 82: storage class is not first
202 # The below are also required for math_functions.h / math_functions.hpp at least until CUDA 8.0-RC
203 # 193: zero used for undefined preprocessing identifer
204 # 3346:dynamic exception specifiers are deprecated
205 GMX_TEST_CXXFLAG(CXXFLAGS_WARN_OLD_GPU "-wd7 -wd82 -wd193 -wd3346" GMXC_CXXFLAGS)
207 #All but the following warnings are identical for the C-compiler (see above)
208 # 383: value copied to temporary, reference to temporary used
209 # 444: destructor for base class ".." is not virtual
210 #2282: unrecognized GCC pragma
211 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "-w3 -wd177 -wd383 -wd411 -wd444 -wd981 -wd1418 -wd1572 -wd1599 -wd2259 -wd2547 -wd3280 -wd11074 -wd11076 -wd2282" GMXC_CXXFLAGS)
213 GMX_TEST_CXXFLAG(CXXFLAGS_OPT "-ip -funroll-all-loops -alias-const -ansi-alias -no-prec-div -fimf-domain-exclusion=14" GMXC_CXXFLAGS_RELEASE)
214 GMX_TEST_CXXFLAG(CXXFLAGS_DEBUG "-O0" GMXC_CXXFLAGS_DEBUG)
215 GMX_TEST_CXXFLAG(CXXFLAGS_FP_RELASSERT "-fp-model except -fp-model precise" GMXC_CXXFLAGS_RELWITHASSERT)
218 GMX_TEST_CXXFLAG(CXXFLAGS_PRAGMA "/wd3180" GMXC_CFLAGS)
220 if (GMX_COMPILER_WARNINGS)
221 #809: exception specification for virtual function X is incompatible with that of overridden function
222 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "/W3 /wd177 /wd383 /wd411 /wd444 /wd809 /wd981 /wd1418 /wd1572 /wd1599 /wd2259 /wd2547 /wd3280 /wd11074 /wd11076 /wd2282" GMXC_CXXFLAGS)
224 GMX_TEST_CXXFLAG(CXXFLAGS_OPT "/Qip" GMXC_CXXFLAGS_RELEASE)
229 # Inter-procedural analysis causes pgcc/pgc++ to crash when linking the library with PGI release 15.7.
230 if (CMAKE_C_COMPILER_ID MATCHES "PGI")
231 GMX_TEST_CFLAG(CFLAGS_OPT "-Mnoipa" GMXC_CFLAGS_RELEASE)
233 if (CMAKE_CXX_COMPILER_ID MATCHES "PGI")
234 # Using ipa exposes internal PGI-15.7 compiler bugs at compile time
235 GMX_TEST_CXXFLAG(CXXFLAGS_OPT "-Mnoipa" GMXC_CXXFLAGS_RELEASE)
236 # PGI identifies itself as GCC, but does not understand the GCC
237 # pragmas that occur in parser.cpp. Since that file is generated
238 # we cannot add a define there, but supress the warning instead.
239 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "--diag_suppress=1675" GMXC_CXXFLAGS)
243 if (CMAKE_C_COMPILER_ID MATCHES "PathScale")
245 GMX_TEST_CFLAG(CFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CFLAGS)
247 if (GMX_COMPILER_WARNINGS)
248 GMX_TEST_CFLAG(CFLAGS_WARN "-Wall -Wno-unused -Wunused-value" GMXC_CFLAGS)
250 GMX_TEST_CFLAG(CFLAGS_OPT "-OPT:Ofast -fno-math-errno -ffast-math"
252 GMX_TEST_CFLAG(CFLAGS_LANG "-std=gnu99" GMXC_CFLAGS)
254 if (CMAKE_CXX_COMPILER_ID MATCHES "PathScale")
256 GMX_TEST_CXXFLAG(CXXFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CXXFLAGS)
258 if (GMX_COMPILER_WARNINGS)
259 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "-Wall -Wno-unused -Wunused-value" GMXC_CXXFLAGS)
261 GMX_TEST_CXXFLAG(CXXFLAGS_OPT "-OPT:Ofast -fno-math-errno -ffast-math"
262 GMXC_CXXFLAGS_RELEASE)
266 # The suppressions below stop
267 # 1500-036: (I) about -O3 causing non-strict IEEE compliance that changes the semantics of the program (duh)
268 # 1500-010: (W) about correct PBC-related use of maximum array indices of DIM-sized C arrays
269 # 1500-030: (I) Additional optimization may be attained by recompiling and specifying MAXMEM option with a value greater than 8192.
270 if (CMAKE_C_COMPILER_ID MATCHES "XL")
271 GMX_TEST_CFLAG(CFLAGS_ARCH "-qarch=auto -qtune=auto" GMXC_CFLAGS)
272 GMX_TEST_CFLAG(CFLAGS_OPT "-O3" GMXC_CFLAGS_RELEASE)
273 GMX_TEST_CFLAG(CFLAGS_LANG "-qlanglvl=extc99" GMXC_CFLAGS)
274 GMX_TEST_CFLAG(CFLAGS_LANG "-qsuppress=1500-036 -qsuppress=1500-010 -qsuppress=1500-030" GMXC_CFLAGS)
276 if (CMAKE_CXX_COMPILER_ID MATCHES "XL")
277 GMX_TEST_CXXFLAG(CXXFLAGS_ARCH "-qarch=auto -qtune=auto" GMXC_CXXFLAGS)
278 GMX_TEST_CXXFLAG(CXXFLAGS_OPT "-O3" GMXC_CXXFLAGS_RELEASE)
279 GMX_TEST_CXXFLAG(CXXFLAGS_LANG "-qsuppress=1500-036 -qsuppress=1500-010 -qsuppress=1500-030" GMXC_CXXFLAGS)
284 # disable warnings for:
285 # forcing value to bool
286 # "this" in initializer list
287 # deprecated (posix, secure) functions
288 # truncation (double -> float)
289 # conversion from 'double' to 'real', possible loss of data
290 # unreferenced local variable (only C)
291 # conversion from 'size_t' to 'int', possible loss of data
292 # conversion from 'const char*' to 'void*', different 'const' qualifiers (only C)
293 if(NOT CMAKE_CONFIGURATION_TYPES)
294 GMX_TEST_CFLAG(CFLAGS_WARN "/wd4800 /wd4355 /wd4996 /wd4305 /wd4244 /wd4101 /wd4267 /wd4090" GMXC_CFLAGS)
295 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "/wd4800 /wd4355 /wd4996 /wd4305 /wd4244 /wd4267" GMXC_CXXFLAGS)
296 else() #Projects only use the C++ flags
297 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "/wd4800 /wd4355 /wd4996 /wd4305 /wd4244 /wd4101 /wd4267 /wd4090" GMXC_CXXFLAGS)
301 if (CMAKE_C_COMPILER_ID MATCHES "Clang")
303 GMX_TEST_CFLAG(CFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CFLAGS)
305 if (GMX_COMPILER_WARNINGS)
306 GMX_TEST_CFLAG(CFLAGS_WARN "-Wall -Wno-unused -Wunused-value -Wunused-parameter" GMXC_CFLAGS)
307 GMX_TEST_CFLAG(CFLAGS_WARN_EXTRA "-Wpointer-arith" GMXC_CFLAGS_EXTRA)
311 if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
313 GMX_TEST_CXXFLAG(CXXFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CXXFLAGS)
315 if (GMX_COMPILER_WARNINGS)
316 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "-Wall" GMXC_CXXFLAGS)
317 GMX_TEST_CXXFLAG(CXXFLAGS_WARN_EXTRA "-Wextra -Wno-missing-field-initializers -Wpointer-arith -Wmissing-prototypes" GMXC_CXXFLAGS)
318 GMX_TEST_CXXFLAG(CXXFLAGS_DEPRECATED "-Wdeprecated" GMXC_CXXFLAGS)
322 # Fujitsu compilers on PrimeHPC/Sparc64
323 if(${CMAKE_C_COMPILER_ID} MATCHES Fujitsu OR
324 (${CMAKE_C_COMPILER_ID} MATCHES unknown AND ${CMAKE_C_COMPILER} MATCHES ^fcc))
325 GMX_TEST_CFLAG(CFLAG_GNUCOMPAT "-Xg -w" GMXC_CFLAGS)
326 GMX_TEST_CFLAG(CFLAG_OPT "-Kfast,reduction,swp,simd=2,uxsimd,fsimple -x100" GMXC_CFLAGS)
329 if(${CMAKE_CXX_COMPILER_ID} MATCHES Fujitsu OR
330 (${CMAKE_CXX_COMPILER_ID} MATCHES unknown AND ${CMAKE_CXX_COMPILER} MATCHES ^FCC))
331 GMX_TEST_CXXFLAG(CXXFLAG_GNUCOMPAT "-Xg -w" GMXC_CXXFLAGS)
332 GMX_TEST_CXXFLAG(CXXFLAG_OPT "-Kfast,reduction,swp,simd=2,uxsimd,fsimple -x100" GMXC_CXXFLAGS)
335 # now actually set the flags:
336 if (NOT GMX_SKIP_DEFAULT_CFLAGS)
337 gmx_set_cmake_compiler_flags()