0deeef0127
Modules that starts with the prefix "Use" alters the build to enable something by default, whereas modules that only provide functionality is not common to start with that prefix.
94 lines
3.4 KiB
CMake
94 lines
3.4 KiB
CMake
# - Create config.h based on a list of variables
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#
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# Synopsis:
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# configure_vars (FILE filename verb varlist)
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# where
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# filename Full path (including name) of config.h
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# verb WRITE or APPEND if truncating or not
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# varlist List of variable names that has been defined
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#
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# In addition, this function will define HAVE_CONFIG_H for the
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# following compilations, (only) if the filename is "config.h".
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#
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# Example:
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# list (APPEND FOO_CONFIG_VARS
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# "/* bar library */"
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# "HAVE_BAR"
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# "HAVE_BAR_VERSION_2"
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# )
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# configure_vars (
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# FILE ${PROJECT_BINARY_DIR}/config.h
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# WRITE ${FOO_CONFIG_VARS}
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# )
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# Copyright (C) 2012 Uni Research AS
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# This file is licensed under the GNU General Public License v3.0
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function (configure_vars obj filename verb)
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# this is just to make the syntax look like the build-in commands
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message (STATUS "Writing config file \"${filename}\"...")
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if (NOT ("${obj}" STREQUAL "FILE" AND
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(("${verb}" STREQUAL "WRITE") OR ("${verb}" STREQUAL "APPEND"))))
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message (FATAL_ERROR "Syntax error in argument list")
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endif (NOT ("${obj}" STREQUAL "FILE" AND
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(("${verb}" STREQUAL "WRITE") OR ("${verb}" STREQUAL "APPEND"))))
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# truncate the file if the verb was "WRITE"
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if (verb STREQUAL "WRITE")
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file (WRITE "${filename}" "")
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endif (verb STREQUAL "WRITE")
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# whenever we use this, we also signal to the header files that we
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# have "config.h". add this before any other files (known till now)
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# to avoid confusion from other configuration files.
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get_filename_component (_config_path "${filename}" PATH)
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get_filename_component (_config_file "${filename}" NAME)
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if ("${_config_file}" STREQUAL "config.h")
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add_definitions (-DHAVE_CONFIG_H=1)
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include_directories (BEFORE "${_config_path}")
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endif ("${_config_file}" STREQUAL "config.h")
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# only write the current value of each variable once
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list (APPEND _args ${ARGN})
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list (REMOVE_DUPLICATES _args)
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# process each variable
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set (_prev_verbatim TRUE)
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foreach (_var IN LISTS _args)
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# massage the name to remove source code formatting
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string (REGEX REPLACE "^[\\n\\t\\ ]+" "" _var "${_var}")
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string (REGEX REPLACE "[\\n\\t\\ ]+$" "" _var "${_var}")
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# if the name of a variable has the syntax of a comments, write it
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# verbatim to the file; this can be used to create headings
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if ("${_var}" MATCHES "^/[/*]")
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if (NOT _prev_verbatim)
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file (APPEND "${filename}" "\n")
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endif (NOT _prev_verbatim)
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file (APPEND "${filename}" "${_var}\n")
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set (_prev_verbatim TRUE)
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else ("${_var}" MATCHES "^/[/*]")
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# check for empty variable; variables that are explicitly set to false
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# is not included in this clause
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if ((NOT DEFINED ${_var}) OR ("${${_var}}" STREQUAL ""))
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file (APPEND "${filename}" "/* #undef ${_var} */\n")
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else ((NOT DEFINED ${_var}) OR ("${${_var}}" STREQUAL ""))
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# integer variables (specifically 0 and 1) are written as they are,
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# whereas everything else (including version numbers, which could
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# be interpreted as floats) are quoted as strings
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if (${_var} MATCHES "[0-9]+")
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file (APPEND "${filename}" "#define ${_var} ${${_var}}\n")
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else (${_var} MATCHES "[0-9]+")
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file (APPEND "${filename}" "#define ${_var} \"${${_var}}\"\n")
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endif (${_var} MATCHES "[0-9]+")
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endif ((NOT DEFINED ${_var}) OR ("${${_var}}" STREQUAL ""))
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set (_prev_verbatim FALSE)
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endif ("${_var}" MATCHES "^/[/*]")
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endforeach(_var)
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endfunction (configure_vars)
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