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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. Currently unused, but we plan to use -Wno-array-bounds
72 # in Release to work around gcc-4.8 being a little too vocal
73 # about some perfectly good code, while using RelWithAssert
74 # (ie. without that suppression) in Jenkins.
75 set(GMXC_${language}FLAGS_RELEASE "${GMXC_${language}FLAGS_RELEASE} ${GMXC_${language}FLAGS_RELEASE_ONLY}")
77 # Modify the real CMake variables for compiler flags for all
78 # builds and language types, and also those common to all
80 foreach(build_type "" ${build_types_with_explicit_flags})
81 if("${build_type}" STREQUAL "")
82 set(punctuation "") # for general compiler flags (e.g.) CMAKE_CXX_FLAGS
84 set(punctuation "_") # for build-type-specific compiler flags (e.g.) CMAKE_CXX_FLAGS_RELEASE
87 # Append to the variables for the given build type for
88 # each language, in the parent scope. We add our new variables at the end, so
89 # compiler-specific choices are more likely to override default CMake choices.
90 # This is for instance useful for RelWithDebInfo builds, where we want to use the full
91 # set of our optimization flags detected in this file, rather than having -O2 override them.
92 set(CMAKE_${language}_FLAGS${punctuation}${build_type}
93 "${CMAKE_${language}_FLAGS${punctuation}${build_type}} ${GMXC_${language}FLAGS${punctuation}${build_type}}"
99 # This is the actual exported function to be called
102 include(CheckCCompilerFlag)
103 include(CheckCXXCompilerFlag)
106 if(CMAKE_COMPILER_IS_GNUCC)
107 #flags are added in reverse order and -Wno* need to appear after -Wall
109 GMX_TEST_CFLAG(CFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CFLAGS)
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 if(NOT GMX_GPU) #TODO: Fix that CUDA code has warnings
114 GMX_TEST_CFLAG(CFLAGS_WARN_UNDEF "-Wundef" GMXC_CFLAGS)
116 # Since 4.8 on by default. For previous version disabling is a no-op. Only disabling for Release because with assert
117 # the warnings are OK.
118 GMX_TEST_CFLAG(CFLAGS_WARN_REL "-Wno-array-bounds" GMXC_CFLAGS_RELEASE_ONLY)
120 GMX_TEST_CFLAG(CFLAGS_WARN_SUBSCRIPT "-Wno-char-subscripts" GMXC_CFLAGS)
123 GMX_TEST_CFLAG(CFLAGS_EXCESS_PREC "-fexcess-precision=fast" GMXC_CFLAGS_RELEASE)
124 GMX_TEST_CFLAG(CFLAGS_COPT "-funroll-all-loops"
126 GMX_TEST_CFLAG(CFLAGS_NOINLINE "-fno-inline" GMXC_CFLAGS_DEBUG)
129 if(CMAKE_COMPILER_IS_GNUCXX)
131 GMX_TEST_CXXFLAG(CXXFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CXXFLAGS)
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)
138 GMX_TEST_CXXFLAG(CXXFLAGS_WARN_UNDEF "-Wundef" GMXC_CXXFLAGS)
140 GMX_TEST_CFLAG(CXXFLAGS_WARN_REL "-Wno-array-bounds" GMXC_CXXFLAGS_RELEASE_ONLY)
142 GMX_TEST_CXXFLAG(CXXFLAGS_EXCESS_PREC "-fexcess-precision=fast" GMXC_CXXFLAGS_RELEASE)
143 GMX_TEST_CXXFLAG(CXXFLAGS_COPT "-funroll-all-loops"
144 GMXC_CXXFLAGS_RELEASE)
145 GMX_TEST_CXXFLAG(CXXFLAGS_NOINLINE "-fno-inline" GMXC_CXXFLAGS_DEBUG)
149 if (CMAKE_C_COMPILER_ID MATCHES "Intel")
152 if(CMAKE_C_COMPILER_VERSION VERSION_GREATER 13.99.99)
153 # 3180: unrecognized OpenMP #pragma
154 GMX_TEST_CFLAG(CFLAGS_PRAGMA "-wd3180" GMXC_CFLAGS)
156 # 161: unrecognized #pragma
157 GMX_TEST_CFLAG(CFLAGS_PRAGMA "-wd161" GMXC_CFLAGS)
160 if(CMAKE_C_COMPILER_VERSION VERSION_LESS 15.00.00)
161 # 193: zero used for undefined preprocessing identifier ".."
162 GMX_TEST_CFLAG(CFLAGS_WARN_OLD -wd193 GMXC_CFLAGS)
164 # 177: function/variable ".." was declared but never referenced
165 # 271: trailing comma is nonstandard
166 # 304: access control not specified ("public" by default)
167 # 383: value copied to temporary, reference to temporary used
168 # 424: extra ";" ignored
169 # 444: destructor for base class ".." is not virtual
170 # 522: function ".." redeclared "inline" after being called
171 # 593: variable ".." was set but never used
172 # 869: parameter ".." was never referenced
173 # 981: operands are evaluated in unspecified order
174 #1418: external function definition with no prior declaration
175 #1419: external declaration in primary source file
176 #1572: floating-point equality and inequality comparisons are unreliable
177 #1599: declaration hides variable ".."
178 #2259: non-pointer conversion from ".." to ".." may lose significant bits
179 #2415: variable ".." of static storage duration was declared but never referenced
180 #2547: ".." was specified as both a system and non-system include directory
181 #2557: comparison between signed and unsigned operands
182 #3280: declaration hides member ".."
183 #3346: dynamic exception specifications are deprecated
184 #11074: Inlining inhibited by limit max-size(/max-total-size)
185 #11076: To get full report use -opt-report=3 -opt-report-phase ipo (shown for previous remark)
186 GMX_TEST_CFLAG(CFLAGS_WARN "-w3 -wd177 -wd271 -wd304 -wd383 -wd424 -wd444 -wd522 -wd593 -wd869 -wd981 -wd1418 -wd1419 -wd1572 -wd1599 -wd2259 -wd2415 -wd2547 -wd2557 -wd3280 -wd3346 -wd11074 -wd11076" GMXC_CFLAGS)
187 GMX_TEST_CFLAG(CFLAGS_STDGNU "-std=gnu99" GMXC_CFLAGS)
188 GMX_TEST_CFLAG(CFLAGS_OPT "-ip -funroll-all-loops -alias-const -ansi-alias" GMXC_CFLAGS_RELEASE)
189 GMX_TEST_CFLAG(CFLAGS_DEBUG "-O0" GMXC_CFLAGS_DEBUG) #icc defaults to -O2 even with -g
190 GMX_TEST_CFLAG(CFLAGS_FP_RELASSERT "-fp-model except -fp-model precise" GMXC_CFLAGS_RELWITHASSERT)
193 if(CMAKE_C_COMPILER_VERSION VERSION_GREATER 13.99.99)
194 GMX_TEST_CFLAG(CFLAGS_PRAGMA "/wd3180" GMXC_CFLAGS)
196 GMX_TEST_CFLAG(CFLAGS_PRAGMA "/wd161" GMXC_CFLAGS)
199 if(CMAKE_C_COMPILER_VERSION VERSION_LESS 15.00.00)
200 GMX_TEST_CFLAG(CFLAGS_WARN_OLD /wd193 GMXC_CFLAGS)
202 GMX_TEST_CFLAG(CFLAGS_WARN "/W3 /wd177 /wd271 /wd304 /wd383 /wd424 /wd444 /wd522 /wd593 /wd869 /wd981 /wd1418 /wd1419 /wd1572 /wd1599 /wd2259 /wd2415 /wd2547 /wd2557 /wd3280 /wd3346" GMXC_CFLAGS)
203 GMX_TEST_CFLAG(CFLAGS_OPT "/Qip" GMXC_CFLAGS_RELEASE)
207 if (CMAKE_CXX_COMPILER_ID MATCHES "Intel")
210 if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 13.99.99)
211 GMX_TEST_CXXFLAG(CXXFLAGS_PRAGMA "-wd3180" GMXC_CXXFLAGS)
213 GMX_TEST_CXXFLAG(CXXFLAGS_PRAGMA "-wd161" GMXC_CXXFLAGS)
216 if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 15.00.00)
217 GMX_TEST_CXXFLAG(CXXFLAGS_WARN_OLD -wd193 GMXC_CXXFLAGS)
219 #All but the following warnings are identical for the C-compiler (see above)
220 #1782: #pragma once is obsolete
221 #2282: unrecognized GCC pragma
222 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "-w3 -wd177 -wd271 -wd304 -wd383 -wd424 -wd444 -wd522 -wd593 -wd869 -wd981 -wd1418 -wd1419 -wd1572 -wd1599 -wd2259 -wd2415 -wd2547 -wd2557 -wd3280 -wd3346 -wd11074 -wd11076 -wd1782 -wd2282" GMXC_CXXFLAGS)
223 GMX_TEST_CXXFLAG(CXXFLAGS_OPT "-ip -funroll-all-loops -alias-const -ansi-alias" GMXC_CXXFLAGS_RELEASE)
224 GMX_TEST_CXXFLAG(CXXFLAGS_DEBUG "-O0" GMXC_CXXFLAGS_DEBUG)
225 GMX_TEST_CXXFLAG(CXXFLAGS_FP_RELASSERT "-fp-model except -fp-model precise" GMXC_CXXFLAGS_RELWITHASSERT)
228 if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 13.99.99)
229 GMX_TEST_CXXFLAG(CXXFLAGS_PRAGMA "/wd3180" GMXC_CFLAGS)
231 GMX_TEST_CXXFLAG(CXXFLAGS_PRAGMA "/wd161" GMXC_CXXFLAGS)
234 if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 15.00.00)
235 GMX_TEST_CXXFLAG(CXXFLAGS_WARN_OLD /wd193 GMXC_CXXFLAGS)
237 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "/W3 /wd177 /wd271 /wd304 /wd383 /wd424 /wd444 /wd522 /wd593 /wd869 /wd981 /wd1418 /wd1419 /wd1572 /wd1599 /wd2259 /wd2415 /wd2547 /wd2557 /wd3280 /wd3346 /wd1782 /wd2282" GMXC_CXXFLAGS)
238 GMX_TEST_CXXFLAG(CXXFLAGS_OPT "/Qip" GMXC_CXXFLAGS_RELEASE)
243 # Inter-procedural analysis causes pgcc/pgc++ to crash when linking the library with PGI release 15.7.
244 if (CMAKE_C_COMPILER_ID MATCHES "PGI")
245 GMX_TEST_CFLAG(CFLAGS_OPT "-Mnoipa" GMXC_CFLAGS_RELEASE)
247 if (CMAKE_CXX_COMPILER_ID MATCHES "PGI")
248 GMX_TEST_CXXFLAG(CXXFLAGS_OPT "-Mnoipa" GMXC_CXXFLAGS_RELEASE)
252 if (CMAKE_C_COMPILER_ID MATCHES "PathScale")
254 GMX_TEST_CFLAG(CFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CFLAGS)
256 GMX_TEST_CFLAG(CFLAGS_WARN "-Wall -Wno-unused -Wunused-value" GMXC_CFLAGS)
257 GMX_TEST_CFLAG(CFLAGS_OPT "-OPT:Ofast -fno-math-errno -ffast-math"
259 GMX_TEST_CFLAG(CFLAGS_LANG "-std=gnu99" GMXC_CFLAGS)
261 if (CMAKE_CXX_COMPILER_ID MATCHES "PathScale")
263 GMX_TEST_CXXFLAG(CXXFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CXXFLAGS)
265 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "-Wall -Wno-unused -Wunused-value" GMXC_CXXFLAGS)
266 GMX_TEST_CXXFLAG(CXXFLAGS_OPT "-OPT:Ofast -fno-math-errno -ffast-math"
267 GMXC_CXXFLAGS_RELEASE)
271 # The suppressions below stop
272 # 1500-036: (I) about -O3 causing non-strict IEEE compliance that changes the semantics of the program (duh)
273 # 1500-010: (W) about correct PBC-related use of maximum array indices of DIM-sized C arrays
274 # 1500-030: (I) Additional optimization may be attained by recompiling and specifying MAXMEM option with a value greater than 8192.
275 if (CMAKE_C_COMPILER_ID MATCHES "XL")
276 GMX_TEST_CFLAG(CFLAGS_ARCH "-qarch=auto -qtune=auto" GMXC_CFLAGS)
277 GMX_TEST_CFLAG(CFLAGS_OPT "-O3" GMXC_CFLAGS_RELEASE)
278 GMX_TEST_CFLAG(CFLAGS_LANG "-qlanglvl=extc99" GMXC_CFLAGS)
279 GMX_TEST_CFLAG(CFLAGS_LANG "-qsuppress=1500-036 -qsuppress=1500-010 -qsuppress=1500-030" GMXC_CFLAGS)
281 if (CMAKE_CXX_COMPILER_ID MATCHES "XL")
282 GMX_TEST_CXXFLAG(CXXFLAGS_ARCH "-qarch=auto -qtune=auto" GMXC_CXXFLAGS)
283 GMX_TEST_CXXFLAG(CXXFLAGS_OPT "-O3" GMXC_CXXFLAGS_RELEASE)
284 GMX_TEST_CXXFLAG(CXXFLAGS_LANG "-qsuppress=1500-036 -qsuppress=1500-010 -qsuppress=1500-030" GMXC_CXXFLAGS)
289 # disable warnings for:
290 # forcing value to bool
291 # "this" in initializer list
292 # deprecated (posix, secure) functions
293 # truncation (double -> float)
294 # conversion from 'double' to 'real', possible loss of data
295 # unreferenced local variable (only C)
296 # conversion from 'size_t' to 'int', possible loss of data
297 # conversion from 'const char*' to 'void*', different 'const' qualifiers (only C)
298 if(NOT CMAKE_CONFIGURATION_TYPES)
299 GMX_TEST_CFLAG(CFLAGS_WARN "/wd4800 /wd4355 /wd4996 /wd4305 /wd4244 /wd4101 /wd4267 /wd4090" GMXC_CFLAGS)
300 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "/wd4800 /wd4355 /wd4996 /wd4305 /wd4244 /wd4267" GMXC_CXXFLAGS)
301 else() #Projects only use the C++ flags
302 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "/wd4800 /wd4355 /wd4996 /wd4305 /wd4244 /wd4101 /wd4267 /wd4090" GMXC_CXXFLAGS)
306 if (CMAKE_C_COMPILER_ID MATCHES "Clang")
308 GMX_TEST_CFLAG(CFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CFLAGS)
310 GMX_TEST_CFLAG(CFLAGS_WARN "-Wall -Wno-unused -Wunused-value -Wunused-parameter" GMXC_CFLAGS)
311 GMX_TEST_CFLAG(CFLAGS_WARN_EXTRA "-Wpointer-arith" GMXC_CFLAGS_EXTRA)
314 if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
316 GMX_TEST_CXXFLAG(CXXFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CXXFLAGS)
318 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "-Wall -Wno-unused-function" GMXC_CXXFLAGS)
319 GMX_TEST_CXXFLAG(CXXFLAGS_WARN_EXTRA "-Wextra -Wno-missing-field-initializers -Wpointer-arith" 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()
339 ENDMACRO(gmx_c_flags)