2 # This file is part of the GROMACS molecular simulation package.
4 # Copyright (c) 2013,2014,2015,2017, by the GROMACS development team, led by
5 # Mark Abraham, David van der Spoel, Berk Hess, and Erik Lindahl,
6 # and including many others, as listed in the AUTHORS file in the
7 # top-level source directory and at http://www.gromacs.org.
9 # GROMACS is free software; you can redistribute it and/or
10 # modify it under the terms of the GNU Lesser General Public License
11 # as published by the Free Software Foundation; either version 2.1
12 # of the License, or (at your option) any later version.
14 # GROMACS is distributed in the hope that it will be useful,
15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 # Lesser General Public License for more details.
19 # You should have received a copy of the GNU Lesser General Public
20 # License along with GROMACS; if not, see
21 # http://www.gnu.org/licenses, or write to the Free Software Foundation,
22 # Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
24 # If you want to redistribute modifications to GROMACS, please
25 # consider that scientific software is very special. Version
26 # control is crucial - bugs must be traceable. We will be happy to
27 # consider code for inclusion in the official distribution, but
28 # derived work must not be called official GROMACS. Details are found
29 # in the README & COPYING files - if they are missing, get the
30 # official version at http://www.gromacs.org.
32 # To help us fund GROMACS development, we humbly ask that you cite
33 # the research papers on the package. Check out http://www.gromacs.org.
35 # Helper functions for managing more complex options
38 # Creates a string cache variable with multiple choices
41 # gmx_option_multichoice(VAR "Description" DEFAULT_VALUE
42 # Value1 Value2 ... ValueN)
44 # VAR is set in the cache and in the caller's scope. The caller can assume
45 # that it is always one of the provided values, converted to uppercase.
47 # Main benefit is that the list of allowed values only needs to be provided
48 # once, and gets used in multiple contexts:
49 # 1. It is automatically added to the description.
50 # 2. It is set as the STRINGS property of the created cache variable for use
52 # 3. The user-provided value is checked against the list, and a fatal error
53 # is produced if the value is not known. The caller does not need to
54 # produce good error messages in cases where it may be necessary to check
55 # for the validity again.
56 # As a special case, any "[built-in]" string in the allowed values is ignored
57 # when checking the user-provided value, but is added to all user-visible
60 # It appears that ccmake does not use the STRINGS property, but perhaps some
63 function(GMX_OPTION_MULTICHOICE NAME DESCRIPTION DEFAULT)
64 # Some processing of the input values
65 string(REPLACE ";" ", " _allowed_comma_separated "${ARGN}")
66 set(_description "${DESCRIPTION}. Pick one of: ${_allowed_comma_separated}")
67 string(REPLACE "[built-in]" "" _allowed "${ARGN}")
69 # Set the cache properties
70 set(${NAME} ${DEFAULT} CACHE STRING "${_description}")
71 set_property(CACHE ${NAME} PROPERTY STRINGS ${_allowed})
73 # Check that the value is one of the allowed
74 set(_org_value "${${NAME}}")
75 string(TOUPPER "${${NAME}}" ${NAME})
76 string(TOUPPER "${_allowed}" _allowed_as_upper)
77 list(FIND _allowed_as_upper "${${NAME}}" _found_index)
78 if (_found_index EQUAL -1)
79 message(FATAL_ERROR "Invalid value for ${NAME}: ${_org_value}. "
80 "Pick one of: ${_allowed_comma_separated}")
82 # Always provide the upper-case value to the caller
83 set(${NAME} "${${NAME}}" PARENT_SCOPE)
86 # Convenience function for reporting a fatal error for an invalid input value
87 function(GMX_INVALID_OPTION_VALUE NAME)
88 message(FATAL_ERROR "Invalid value for ${NAME}: ${${NAME}}")
91 # Declares a cache variable with ON/OFF/AUTO values
94 # gmx_option_trivalue(VAR "Description" DEFAULT)
97 # VAR is created in the cache, and the caller can assume that the value is
98 # always one of ON/OFF/AUTO. Additionally, VAR_AUTO is set if value is AUTO,
99 # and VAR_FORCE is set if value is ON.
100 # These make it convenient to check for any combination of states with simple
101 # if() statements (simple if(VAR) matches AUTO and ON).
102 function(GMX_OPTION_TRIVALUE NAME DESCRIPTION DEFAULT)
103 set(_description "${DESCRIPTION}. ON/OFF/AUTO")
104 set(${NAME} ${DEFAULT} CACHE STRING "${_description}")
105 set_property(CACHE ${NAME} PROPERTY STRINGS ON OFF AUTO)
107 set(${NAME}_AUTO OFF)
108 set(${NAME}_FORCE OFF)
109 string(TOUPPER "${${NAME}}" ${NAME})
110 if ("${${NAME}}" STREQUAL "AUTO")
113 set(${NAME}_FORCE ON)
118 # Always provide the sanitized value to the caller
119 set(${NAME} "${${NAME}}" PARENT_SCOPE)
120 set(${NAME}_AUTO "${${NAME}_AUTO}" PARENT_SCOPE)
121 set(${NAME}_FORCE "${${NAME}_FORCE}" PARENT_SCOPE)
124 # Hides or shows a cache value based on conditions
127 # gmx_add_cache_dependency(VAR TYPE CONDITIONS VALUE)
129 # VAR is a name of a cached variable
130 # TYPE is the type of VAR
131 # CONDITIONS is a list of conditional expressions (see below)
132 # VALUE is a value that is set to VAR if CONDITIONS is not satisfied
134 # Evaluates each condition in CONDITIONS, and if any of them is false,
135 # VAR is marked internal (hiding it from the user) and its value is set to
136 # VALUE. The previous user-set value of VAR is still remembered in the cache,
137 # and used when CONDITIONS become true again.
139 # The conditions is a semicolon-separated list of conditions as specified for
140 # CMake if() statements, such as "GMX_FFT_LIBRARY STREQUAL FFTW3",
141 # "NOT GMX_MPI" or "GMX_MPI;NOT GMX_DOUBLE". Note that quotes within the
142 # expressions don't work for some reason (even if escaped).
144 # The logic is adapted from cmake_dependent_option().
146 function(GMX_ADD_CACHE_DEPENDENCY NAME TYPE CONDITIONS FORCED_VALUE)
148 foreach(_cond ${CONDITIONS})
149 string(REGEX REPLACE " +" ";" _cond_as_list ${_cond})
150 if (${_cond_as_list})
152 set(_available FALSE)
156 set_property(CACHE ${NAME} PROPERTY TYPE ${TYPE})
158 set(${NAME} "${FORCED_VALUE}" PARENT_SCOPE)
159 set_property(CACHE ${NAME} PROPERTY TYPE INTERNAL)
163 # Works like cmake_dependent_option(), but allows for an arbitrary cache value
164 # instead of only an ON/OFF option
167 # gmx_dependent_cache_variable(VAR "Description" TYPE DEFAULT CONDITIONS)
169 # Creates a cache variable VAR with the given description, type and default
170 # value. If any of the conditions listed in CONDITIONS is not true, then
171 # the cache variable is marked internal (hiding it from the user) and the
172 # value of VAR is set to DEFAULT. The previous user-set value of VAR is still
173 # remembered in the cache, and used when CONDITIONS become true again.
174 # Any further changes to the variable can be done with simple set()
175 # (or set_property(CACHE VAR PROPERTY VALUE ...) if the cache needs to be
178 # See gmx_add_cache_dependency() on how to specify the conditions.
180 macro(GMX_DEPENDENT_CACHE_VARIABLE NAME DESCRIPTION TYPE DEFAULT CONDITIONS)
181 set(${NAME} "${DEFAULT}" CACHE ${TYPE} "${DESCRIPTION}")
182 gmx_add_cache_dependency(${NAME} ${TYPE} "${CONDITIONS}" "${DEFAULT}")
185 # Works like cmake_dependent_option(), but reuses the code from
186 # gmx_dependent_cache_variable() to make sure both behave the same way.
187 macro(GMX_DEPENDENT_OPTION NAME DESCRIPTION DEFAULT CONDITIONS)
188 gmx_dependent_cache_variable(${NAME} "${DESCRIPTION}" BOOL "${DEFAULT}" "${CONDITIONS}")
191 # Sets a boolean variable based on conditions
194 # gmx_set_boolean(VAR CONDITIONS)
196 # Sets VAR to ON if all conditions listed in CONDITIONS are true, otherwise
199 # See gmx_add_cache_dependency() on how to specify the conditions.
201 function (GMX_SET_BOOLEAN NAME CONDITIONS)
203 foreach(_cond ${CONDITIONS})
204 string(REGEX REPLACE " +" ";" _cond_as_list ${_cond})
205 if (${_cond_as_list})
210 set(${NAME} ${${NAME}} PARENT_SCOPE)
213 # Checks if one or more variables have changed since last call to this function
216 # gmx_check_if_changed(RESULT VAR1 VAR2 ... VARN)
218 # Sets RESULT to true if any of the given variables VAR1 ... VARN has
219 # changed since the last call to this function for that variable.
220 # Changes are tracked also across CMake runs.
221 function(GMX_CHECK_IF_CHANGED RESULT)
223 foreach (_var ${ARGN})
224 if (NOT "${${_var}}" STREQUAL "${${_var}_PREVIOUS_VALUE}")
227 set(${_var}_PREVIOUS_VALUE "${${_var}}" CACHE INTERNAL
228 "Previous value of ${_var} for change tracking")
230 set(${RESULT} ${_result} PARENT_SCOPE)