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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)
68 #Fix for LLVM OpenMP bug (redmine 900). Needs to run before OpenMP flags are set below.
70 exec_program(${CMAKE_C_COMPILER} ARGS --version OUTPUT_VARIABLE _compiler_output)
71 if(_compiler_output MATCHES "llvm.*4\\.2")
72 message(STATUS "OpenMP multithreading not supported with llvm-gcc 4.2, disabled")
73 set(GMX_OPENMP OFF CACHE BOOL
74 "OpenMP multithreading not not supported with llvm-gcc 4.2, disabled!" FORCE)
78 #flags are added in reverse order and -Wno* need to appear after -Wall
80 GMX_TEST_CFLAG(CFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CFLAGS)
82 GMX_TEST_CFLAG(CFLAGS_WARN "-Wall -Wno-unused -Wunused-value" GMXC_CFLAGS)
83 GMX_TEST_CFLAG(CFLAGS_WARN_EXTRA "-Wextra -Wno-missing-field-initializers -Wno-sign-compare" GMXC_CFLAGS)
85 GMX_TEST_CFLAG(CFLAGS_EXCESS_PREC "-fexcess-precision=fast" GMXC_CFLAGS_RELEASE)
86 GMX_TEST_CFLAG(CFLAGS_COPT "-fomit-frame-pointer -funroll-all-loops"
88 GMX_TEST_CFLAG(CFLAGS_NOINLINE "-fno-inline" GMXC_CFLAGS_DEBUG)
91 if(CMAKE_COMPILER_IS_GNUCXX)
93 GMX_TEST_CXXFLAG(CXXFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CXXFLAGS)
95 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "-Wall -Wno-unused -Wunused-value" GMXC_CXXFLAGS)
96 GMX_TEST_CXXFLAG(CXXFLAGS_WARN_EXTRA "-Wextra -Wno-missing-field-initializers -Wno-sign-compare" GMXC_CXXFLAGS)
98 GMX_TEST_CXXFLAG(CXXFLAGS_EXCESS_PREC "-fexcess-precision=fast" GMXC_CXXFLAGS_RELEASE)
99 GMX_TEST_CXXFLAG(CXXFLAGS_COPT "-fomit-frame-pointer -funroll-all-loops"
100 GMXC_CXXFLAGS_RELEASE)
101 GMX_TEST_CXXFLAG(CXXFLAGS_NOINLINE "-fno-inline" GMXC_CXXFLAGS_DEBUG)
105 if (CMAKE_C_COMPILER_ID MATCHES "Intel")
108 GMX_TEST_CFLAG(CFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CFLAGS)
110 GMX_TEST_CFLAG(CFLAGS_WARN "-Wall" GMXC_CFLAGS)
111 GMX_TEST_CFLAG(CFLAGS_STDGNU "-std=gnu99" GMXC_CFLAGS)
112 GMX_TEST_CFLAG(CFLAGS_OPT "-ip -funroll-all-loops" GMXC_CFLAGS_RELEASE)
113 GMX_TEST_CFLAG(CFLAGS_X86 "-mtune=core2" GMXC_CFLAGS_RELEASE)
114 GMX_TEST_CFLAG(CFLAGS_IA64 "-mtune=itanium2" GMXC_CFLAGS_RELEASE)
116 GMX_TEST_CFLAG(CFLAGS_WARN "/W2" GMXC_CFLAGS)
117 GMX_TEST_CFLAG(CFLAGS_X86 "/Qip" GMXC_CFLAGS_RELEASE)
121 if (CMAKE_CXX_COMPILER_ID MATCHES "Intel")
124 GMX_TEST_CXXFLAG(CXXFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CXXFLAGS)
126 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "-Wall" GMXC_CXXFLAGS)
127 GMX_TEST_CXXFLAG(CXXFLAGS_OPT "-ip -funroll-all-loops" GMXC_CXXFLAGS_RELEASE)
128 GMX_TEST_CXXFLAG(CXXFLAGS_X86 "-mtune=core2" GMXC_CXXFLAGS_RELEASE)
129 GMX_TEST_CXXFLAG(CXXFLAGS_IA64 "-mtune=itanium2"
130 GMXC_CXXFLAGS_RELEASE)
132 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "/W2" GMXC_CXXFLAGS)
133 GMX_TEST_CXXFLAG(CXXFLAGS_X86 "/Qip" GMXC_CXXFLAGS_RELEASE)
138 if (CMAKE_C_COMPILER_ID MATCHES "PGI")
139 GMX_TEST_CFLAG(CFLAGS_OPT "-fastsse" GMXC_CFLAGS_RELEASE)
141 if (CMAKE_CXX_COMPILER_ID MATCHES "PGI")
142 GMX_TEST_CXXFLAG(CXXFLAGS_OPT "-fastsse" GMXC_CXXFLAGS_RELEASE)
146 if (CMAKE_C_COMPILER_ID MATCHES "PathScale")
148 GMX_TEST_CFLAG(CFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CFLAGS)
150 GMX_TEST_CFLAG(CFLAGS_WARN "-Wall -Wno-unused -Wunused-value" GMXC_CFLAGS)
151 GMX_TEST_CFLAG(CFLAGS_OPT "-OPT:Ofast -fno-math-errno -ffast-math"
153 GMX_TEST_CFLAG(CFLAGS_LANG "-std=gnu99" GMXC_CFLAGS)
155 if (CMAKE_CXX_COMPILER_ID MATCHES "PathScale")
157 GMX_TEST_CXXFLAG(CXXFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CXXFLAGS)
159 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "-Wall -Wno-unused -Wunused-value" GMXC_CXXFLAGS)
160 GMX_TEST_CXXFLAG(CXXFLAGS_OPT "-OPT:Ofast -fno-math-errno -ffast-math"
161 GMXC_CXXFLAGS_RELEASE)
165 if (CMAKE_C_COMPILER_ID MATCHES "XL")
166 GMX_TEST_CFLAG(CFLAGS_OPT "-qarch=auto -qtune=auto" GMXC_CFLAGS)
167 GMX_TEST_CFLAG(CFLAGS_LANG "-qlanglvl=extc99" GMXC_CFLAGS)
169 if (CMAKE_CXX_COMPILER_ID MATCHES "XL")
170 GMX_TEST_CXXFLAG(CXXFLAGS_OPT "-qarch=auto -qtune=auto" GMXC_CXXFLAGS)
175 # disable warnings for:
176 # inconsistent dll linkage
177 # forcing value to bool (for C++)
178 GMX_TEST_CFLAG(CFLAGS_WARN "/wd4273" GMXC_CFLAGS)
179 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "/wd4273 /wd4800" GMXC_CXXFLAGS)
182 if (CMAKE_C_COMPILER_ID MATCHES "Clang")
184 GMX_TEST_CFLAG(CFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CFLAGS)
186 GMX_TEST_CFLAG(CFLAGS_WARN "-Wall -Wno-unused -Wunused-value" GMXC_CFLAGS)
189 if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
191 GMX_TEST_CXXFLAG(CXXFLAGS_PRAGMA "-Wno-unknown-pragmas" GMXC_CXXFLAGS)
193 GMX_TEST_CXXFLAG(CXXFLAGS_WARN "-Wall -Wno-unused -Wunused-value" GMXC_CXXFLAGS)
196 # now actually set the flags:
198 if ( NOT DEFINED GMXCFLAGS_SET AND NOT DEFINED ENV{CFLAGS} )
199 set(GMXCFLAGS_SET true CACHE INTERNAL "Whether to reset the C flags"
202 set(CMAKE_C_FLAGS "${GMXC_CFLAGS} ${CMAKE_C_FLAGS}"
203 CACHE STRING "Flags used by the compiler during all build types."
205 set(CMAKE_C_FLAGS_RELEASE "${GMXC_CFLAGS_RELEASE} ${CMAKE_C_FLAGS_RELEASE}"
206 CACHE STRING "Flags used by the compiler during release builds."
208 set(CMAKE_C_FLAGS_DEBUG "${GMXC_CFLAGS_DEBUG} ${CMAKE_C_FLAGS_DEBUG}"
209 CACHE STRING "Flags used by the compiler during debug builds."
214 if ( NOT DEFINED GMXCXXFLAGS_SET AND NOT DEFINED ENV{CXXFLAGS} AND CMAKE_CXX_COMPILER_LOADED)
215 set(GMXCXXFLAGS_SET true CACHE INTERNAL "Whether to reset the C++ flags"
217 set(CMAKE_CXX_FLAGS "${GMXC_CXXFLAGS} ${CMAKE_CXX_FLAGS}"
218 CACHE STRING "Flags used by the compiler during all build types."
220 set(CMAKE_CXX_FLAGS_RELEASE
221 "${GMXC_CXXFLAGS_RELEASE} ${CMAKE_CXX_FLAGS_RELEASE}"
222 CACHE STRING "Flags used by the compiler during release builds."
224 set(CMAKE_CXX_FLAGS_DEBUG
225 "${GMXC_CXXFLAGS_DEBUG} ${CMAKE_CXX_FLAGS_DEBUG}"
226 CACHE STRING "Flags used by the compiler during debug builds."
229 ENDMACRO(gmx_c_flags)