diff options
Diffstat (limited to 'Modules/ExternalProject.cmake')
| -rw-r--r-- | Modules/ExternalProject.cmake | 54 |
1 files changed, 45 insertions, 9 deletions
diff --git a/Modules/ExternalProject.cmake b/Modules/ExternalProject.cmake index a92f20c..3d1ab34 100644 --- a/Modules/ExternalProject.cmake +++ b/Modules/ExternalProject.cmake @@ -98,9 +98,27 @@ Create custom targets to build projects in external trees ``CMAKE_GENERATOR_TOOLSET <toolset>`` Generator-specific toolset name ``CMAKE_ARGS <arg>...`` - Arguments to CMake command line + Arguments to CMake command line. + These arguments are passed to CMake command line, and can contain + arguments other than cache values, see also + :manual:`CMake Options <cmake(1)>`. Arguments in the form + ``-Dvar:string=on`` are always passed to the command line, and + therefore cannot be changed by the user. ``CMAKE_CACHE_ARGS <arg>...`` - Initial cache arguments, of the form ``-Dvar:string=on`` + Initial cache arguments, of the form ``-Dvar:string=on``. + These arguments are written in a pre-load a script that populates + CMake cache, see also :manual:`cmake -C <cmake(1)>`. This allows to + overcome command line length limits. + These arguments are :command:`set` using the ``FORCE`` argument, + and therefore cannot be changed by the user. + ``CMAKE_CACHE_DEFAULT_ARGS <arg>...`` + Initial default cache arguments, of the form ``-Dvar:string=on``. + These arguments are written in a pre-load a script that populates + CMake cache, see also :manual:`cmake -C <cmake(1)>`. This allows to + overcome command line length limits. + These arguments can be used as default value that will be set if no + previous value is found in the cache, and that the user can change + later. Build step options are: @@ -986,17 +1004,20 @@ macro(_ep_replace_location_tags target_name) endmacro() -function(_ep_write_initial_cache target_name script_filename args) - # Write out values into an initial cache, that will be passed to CMake with -C +function(_ep_command_line_to_initial_cache var args force) set(script_initial_cache "") set(regex "^([^:]+):([^=]+)=(.*)$") set(setArg "") + set(forceArg "") + if(force) + set(forceArg "FORCE") + endif() foreach(line ${args}) if("${line}" MATCHES "^-D(.*)") set(line "${CMAKE_MATCH_1}") if(setArg) # This is required to build up lists in variables, or complete an entry - set(setArg "${setArg}${accumulator}\" CACHE ${type} \"Initial cache\" FORCE)") + set(setArg "${setArg}${accumulator}\" CACHE ${type} \"Initial cache\" ${forceArg})") set(script_initial_cache "${script_initial_cache}\n${setArg}") set(accumulator "") set(setArg "") @@ -1016,9 +1037,15 @@ function(_ep_write_initial_cache target_name script_filename args) endforeach() # Catch the final line of the args if(setArg) - set(setArg "${setArg}${accumulator}\" CACHE ${type} \"Initial cache\" FORCE)") + set(setArg "${setArg}${accumulator}\" CACHE ${type} \"Initial cache\" ${forceArg})") set(script_initial_cache "${script_initial_cache}\n${setArg}") endif() + set(${var} ${script_initial_cache} PARENT_SCOPE) +endfunction() + + +function(_ep_write_initial_cache target_name script_filename script_initial_cache) + # Write out values into an initial cache, that will be passed to CMake with -C # Replace location tags. _ep_replace_location_tags(${target_name} script_initial_cache) # Write out the initial cache file to the location specified. @@ -1833,11 +1860,20 @@ function(_ep_add_configure_command name) get_property(cmake_args TARGET ${name} PROPERTY _EP_CMAKE_ARGS) list(APPEND cmd ${cmake_args}) - # If there are any CMAKE_CACHE_ARGS, write an initial cache and use it + # If there are any CMAKE_CACHE_ARGS or CMAKE_CACHE_DEFAULT_ARGS, + # write an initial cache and use it get_property(cmake_cache_args TARGET ${name} PROPERTY _EP_CMAKE_CACHE_ARGS) - if(cmake_cache_args) + get_property(cmake_cache_default_args TARGET ${name} PROPERTY _EP_CMAKE_CACHE_DEFAULT_ARGS) + + if(cmake_cache_args OR cmake_cache_default_args) set(_ep_cache_args_script "${tmp_dir}/${name}-cache.cmake") - _ep_write_initial_cache(${name} "${_ep_cache_args_script}" "${cmake_cache_args}") + if(cmake_cache_args) + _ep_command_line_to_initial_cache(script_initial_cache_force "${cmake_cache_args}" 1) + endif() + if(cmake_cache_default_args) + _ep_command_line_to_initial_cache(script_initial_cache_default "${cmake_cache_default_args}" 0) + endif() + _ep_write_initial_cache(${name} "${_ep_cache_args_script}" "${script_initial_cache_force}${script_initial_cache_default}") list(APPEND cmd "-C${_ep_cache_args_script}") endif() |