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36 # Test C flags FLAGS, and set VARIABLE to true if the work. Also add the
38 MACRO(GMX_TEST_CFLAG VARIABLE FLAGS CFLAGSVAR)
39 IF(NOT DEFINED ${VARIABLE})
40 CHECK_C_COMPILER_FLAG("${FLAGS}" ${VARIABLE})
41 ENDIF(NOT DEFINED ${VARIABLE})
43 SET (${CFLAGSVAR} "${FLAGS} ${${CFLAGSVAR}}")
45 ENDMACRO(GMX_TEST_CFLAG VARIABLE FLAGS CFLAGSVAR)
47 # Test C++ flags FLAGS, and set VARIABLE to true if the work. Also add the
48 # flags to CXXFLAGSVAR.
49 MACRO(GMX_TEST_CXXFLAG VARIABLE FLAGS CXXFLAGSVAR)
50 IF(NOT DEFINED ${VARIABLE} AND CMAKE_CXX_COMPILER_LOADED)
51 CHECK_CXX_COMPILER_FLAG("${FLAGS}" ${VARIABLE})
52 ENDIF(NOT DEFINED ${VARIABLE} AND CMAKE_CXX_COMPILER_LOADED)
54 SET (${CXXFLAGSVAR} "${FLAGS} ${${CXXFLAGSVAR}}")
56 ENDMACRO(GMX_TEST_CXXFLAG VARIABLE FLAGS CXXFLAGSVAR)
59 # This is the actual exported function to be called
62 include(CheckCCompilerFlag)
63 include(CheckCXXCompilerFlag)
66 if(CMAKE_COMPILER_IS_GNUCC)
67 #flags are added in reverse order and -Wno* need to appear after -Wall
69 GMX_TEST_CFLAG(CFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CFLAGS)
71 if (C_COMPILER_VERSION VERSION_EQUAL 4.8 OR C_COMPILER_VERSION VERSION_GREATER 4.8)
72 # In gcc 4.8 the default settings for many warning types
73 # were changed. Fixing many of them in C is at best
74 # awkward, and some of the fixes might require ABI
75 # changes, which we prefer not to do in a bugfix
76 # branch. So we introduce these workarounds, and plan to
77 # addess problems in master branch.
78 set(extra_warn_flags_for_gcc_4_8 " -Wno-unused-parameter -Wno-array-bounds -Wno-maybe-uninitialized -Wno-strict-overflow")
80 GMX_TEST_CFLAG(CFLAGS_WARN "-Wall -Wno-unused -Wunused-value${extra_warn_flags_for_gcc_4_8}" GMXC_CFLAGS)
81 GMX_TEST_CFLAG(CFLAGS_WARN_EXTRA "-Wextra -Wno-missing-field-initializers -Wno-sign-compare" GMXC_CFLAGS)
83 GMX_TEST_CFLAG(CFLAGS_EXCESS_PREC "-fexcess-precision=fast" GMXC_CFLAGS_RELEASE)
84 GMX_TEST_CFLAG(CFLAGS_COPT "-fomit-frame-pointer -funroll-all-loops"
86 GMX_TEST_CFLAG(CFLAGS_NOINLINE "-fno-inline" GMXC_CFLAGS_DEBUG)
89 if(CMAKE_COMPILER_IS_GNUCXX)
91 GMX_TEST_CXXFLAG(CXXFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CXXFLAGS)
93 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "-Wall -Wno-unused -Wunused-value" GMXC_CXXFLAGS)
94 GMX_TEST_CXXFLAG(CXXFLAGS_WARN_EXTRA "-Wextra -Wno-missing-field-initializers -Wno-sign-compare" GMXC_CXXFLAGS)
96 GMX_TEST_CXXFLAG(CXXFLAGS_EXCESS_PREC "-fexcess-precision=fast" GMXC_CXXFLAGS_RELEASE)
97 GMX_TEST_CXXFLAG(CXXFLAGS_COPT "-fomit-frame-pointer -funroll-all-loops"
98 GMXC_CXXFLAGS_RELEASE)
99 GMX_TEST_CXXFLAG(CXXFLAGS_NOINLINE "-fno-inline" GMXC_CXXFLAGS_DEBUG)
103 if (CMAKE_C_COMPILER_ID MATCHES "Intel")
106 GMX_TEST_CFLAG(CFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CFLAGS)
108 GMX_TEST_CFLAG(CFLAGS_WARN "-Wall" GMXC_CFLAGS)
109 GMX_TEST_CFLAG(CFLAGS_STDGNU "-std=gnu99" GMXC_CFLAGS)
110 GMX_TEST_CFLAG(CFLAGS_OPT "-ip -funroll-all-loops" GMXC_CFLAGS_RELEASE)
112 GMX_TEST_CFLAG(CFLAGS_WARN "/W2" GMXC_CFLAGS)
113 GMX_TEST_CFLAG(CFLAGS_X86 "/Qip" GMXC_CFLAGS_RELEASE)
117 if (CMAKE_CXX_COMPILER_ID MATCHES "Intel")
120 GMX_TEST_CXXFLAG(CXXFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CXXFLAGS)
122 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "-Wall" GMXC_CXXFLAGS)
123 GMX_TEST_CXXFLAG(CXXFLAGS_OPT "-ip -funroll-all-loops" GMXC_CXXFLAGS_RELEASE)
125 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "/W2" GMXC_CXXFLAGS)
126 GMX_TEST_CXXFLAG(CXXFLAGS_X86 "/Qip" GMXC_CXXFLAGS_RELEASE)
131 if (CMAKE_C_COMPILER_ID MATCHES "PGI")
132 GMX_TEST_CFLAG(CFLAGS_OPT "-fastsse" GMXC_CFLAGS_RELEASE)
134 if (CMAKE_CXX_COMPILER_ID MATCHES "PGI")
135 GMX_TEST_CXXFLAG(CXXFLAGS_OPT "-fastsse" GMXC_CXXFLAGS_RELEASE)
139 if (CMAKE_C_COMPILER_ID MATCHES "PathScale")
141 GMX_TEST_CFLAG(CFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CFLAGS)
143 GMX_TEST_CFLAG(CFLAGS_WARN "-Wall -Wno-unused -Wunused-value" GMXC_CFLAGS)
144 GMX_TEST_CFLAG(CFLAGS_OPT "-OPT:Ofast -fno-math-errno -ffast-math"
146 GMX_TEST_CFLAG(CFLAGS_LANG "-std=gnu99" GMXC_CFLAGS)
148 if (CMAKE_CXX_COMPILER_ID MATCHES "PathScale")
150 GMX_TEST_CXXFLAG(CXXFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CXXFLAGS)
152 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "-Wall -Wno-unused -Wunused-value" GMXC_CXXFLAGS)
153 GMX_TEST_CXXFLAG(CXXFLAGS_OPT "-OPT:Ofast -fno-math-errno -ffast-math"
154 GMXC_CXXFLAGS_RELEASE)
158 if (CMAKE_C_COMPILER_ID MATCHES "XL")
159 GMX_TEST_CFLAG(CFLAGS_OPT "-qarch=auto -qtune=auto" GMXC_CFLAGS)
160 GMX_TEST_CFLAG(CFLAGS_LANG "-qlanglvl=extc99" GMXC_CFLAGS)
162 if (CMAKE_CXX_COMPILER_ID MATCHES "XL")
163 GMX_TEST_CXXFLAG(CXXFLAGS_OPT "-qarch=auto -qtune=auto" GMXC_CXXFLAGS)
168 # disable warnings for:
169 # inconsistent dll linkage
170 # forcing value to bool (for C++)
171 GMX_TEST_CFLAG(CFLAGS_WARN "/wd4273" GMXC_CFLAGS)
172 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "/wd4273 /wd4800" GMXC_CXXFLAGS)
175 if (CMAKE_C_COMPILER_ID MATCHES "Clang")
177 GMX_TEST_CFLAG(CFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CFLAGS)
179 GMX_TEST_CFLAG(CFLAGS_WARN "-Wall -Wno-unused -Wunused-value" GMXC_CFLAGS)
182 if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
184 GMX_TEST_CXXFLAG(CXXFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CXXFLAGS)
186 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "-Wall -Wno-unused -Wunused-value" GMXC_CXXFLAGS)
189 # now actually set the flags:
191 if ( NOT GMX_SKIP_DEFAULT_CFLAGS )
192 set(CMAKE_C_FLAGS "${GMXC_CFLAGS} ${CMAKE_C_FLAGS}")
193 set(CMAKE_C_FLAGS_RELEASE "${GMXC_CFLAGS_RELEASE} ${CMAKE_C_FLAGS_RELEASE}")
194 set(CMAKE_C_FLAGS_DEBUG "${GMXC_CFLAGS_DEBUG} ${CMAKE_C_FLAGS_DEBUG}")
198 if ( NOT GMX_SKIP_DEFAULT_CFLAGS)
199 set(CMAKE_CXX_FLAGS "${GMXC_CXXFLAGS} ${CMAKE_CXX_FLAGS}")
200 set(CMAKE_CXX_FLAGS_RELEASE
201 "${GMXC_CXXFLAGS_RELEASE} ${CMAKE_CXX_FLAGS_RELEASE}")
202 set(CMAKE_CXX_FLAGS_DEBUG
203 "${GMXC_CXXFLAGS_DEBUG} ${CMAKE_CXX_FLAGS_DEBUG}")
205 ENDMACRO(gmx_c_flags)