FM / features

/usr/share/boost-build/src/tools/features/

/usr/share/boost-build/src/tools/features

Name	Size	Mode	Actions
address-model-feature.jam	695	0644	edit dl rm
allow-feature.jam	512	0644	edit dl rm
architecture-feature.jam	1222	0644	edit dl rm
archiveflags-feature.jam	447	0644	edit dl rm
asmflags-feature.jam	400	0644	edit dl rm
build-feature.jam	626	0644	edit dl rm
cflags-feature.jam	691	0644	edit dl rm
conditional-feature.jam	728	0644	edit dl rm
coverage-feature.jam	609	0644	edit dl rm
cxx-template-depth-feature.jam	1427	0644	edit dl rm
cxxabi-feature.jam	407	0644	edit dl rm
cxxflags-feature.jam	374	0644	edit dl rm
cxxstd-feature.jam	1667	0644	edit dl rm
debug-feature.jam	936	0644	edit dl rm
define-feature.jam	708	0644	edit dl rm
dependency-feature.jam	2035	0644	edit dl rm
dll-feature.jam	2218	0644	edit dl rm
exception-feature.jam	1009	0644	edit dl rm
fflags-feature.jam	420	0644	edit dl rm
file-feature.jam	482	0644	edit dl rm
find-lib-feature.jam	1073	0644	edit dl rm
flags-feature.jam	492	0644	edit dl rm
force-include-feature.jam	572	0644	edit dl rm
include-feature.jam	434	0644	edit dl rm
instruction-set-feature.jam	2494	0644	edit dl rm
internal-feature.jam	440	0644	edit dl rm
library-feature.jam	708	0644	edit dl rm
link-feature.jam	406	0644	edit dl rm
linkflags-feature.jam	377	0644	edit dl rm
local-visibility-feature.jam	984	0644	edit dl rm
location-feature.jam	453	0644	edit dl rm
location-prefix-feature.jam	505	0644	edit dl rm
lto-feature.jam	1309	0644	edit dl rm
name-feature.jam	632	0644	edit dl rm
objcflags-feature.jam	657	0644	edit dl rm
optimization-feature.jam	939	0644	edit dl rm
os-feature.jam	3687	0644	edit dl rm
relevant-feature.jam	1992	0644	edit dl rm
rtti-feature.jam	395	0644	edit dl rm
runtime-feature.jam	1290	0644	edit dl rm
sanitizers-feature.jam	1716	0644	edit dl rm
search-feature.jam	516	0644	edit dl rm
source-feature.jam	753	0644	edit dl rm
stdlib-feature.jam	976	0644	edit dl rm
strip-feature.jam	616	0644	edit dl rm
tag-feature.jam	1174	0644	edit dl rm
threadapi-feature.jam	1162	0644	edit dl rm
threading-feature.jam	775	0644	edit dl rm
toolset-feature.jam	528	0644	edit dl rm
translate-path-feature.jam	944	0644	edit dl rm
user-interface-feature.jam	952	0644	edit dl rm
variant-feature.jam	3300	0644	edit dl rm
version-feature.jam	480	0644	edit dl rm
visibility-feature.jam	1987	0644	edit dl rm
warnings-feature.jam	1034	0644	edit dl rm
__init_features__.jam	743	0644	edit dl rm

Edit: /usr/share/boost-build/src/tools/features/variant-feature.jam (3300B)

# Copyright 2017 Rene Rivera
# Distributed under the Boost Software License, Version 1.0.
# (See accompanying file LICENSE_1_0.txt or copy at
# http://www.boost.org/LICENSE_1_0.txt)

import feature ;
import errors ;
import property ;

#| tag::doc[]

[[bbv2.builtin.features.variant]]`variant`::
*Allowed values:* `debug`, `release`, `profile`.
+
A feature combining several low-level features, making it easy to
request common build configurations.
+
The value `debug` expands to
+
----
<optimization>off <debug-symbols>on <inlining>off <runtime-debugging>on
----
+
The value `release` expands to
+
----
<optimization>speed <debug-symbols>off <inlining>full <runtime-debugging>off
----
+
The value `profile` expands to the same as `release`, plus:
+
----
<profiling>on <debug-symbols>on
----
+
Users can define their own build variants using the `variant` rule
from the `common` module.
+
NOTE: Runtime debugging is on in debug builds to suit the expectations of
people used to various IDEs.

|# # end::doc[]

feature.feature variant
    :
    : implicit composite propagated symmetric ;

# Declares a new variant.
#
# First determines explicit properties for this variant, by refining parents'
# explicit properties with the passed explicit properties. The result is
# remembered and will be used if this variant is used as parent.
#
# Second, determines the full property set for this variant by adding to the
# explicit properties default values for all missing non-symmetric properties.
#
# Lastly, makes appropriate value of 'variant' property expand to the full
# property set.
#
rule variant ( name            # Name of the variant
    : parents-or-properties *  # Specifies parent variants, if
                               # 'explicit-properties' are given, and
                               # explicit-properties or parents otherwise.
    : explicit-properties *    # Explicit properties.
    )
{
    local parents ;
    if ! $(explicit-properties)
    {
        if $(parents-or-properties[1]:G)
        {
            explicit-properties = $(parents-or-properties) ;
        }
        else
        {
            parents = $(parents-or-properties) ;
        }
    }
    else
    {
        parents = $(parents-or-properties) ;
    }

# The problem is that we have to check for conflicts between base variants.
    if $(parents[2])
    {
        errors.error "multiple base variants are not yet supported" ;
    }

local inherited ;
    # Add explicitly specified properties for parents.
    for local p in $(parents)
    {
        # TODO: This check may be made stricter.
        if ! [ feature.is-implicit-value $(p) ]
        {
            errors.error "Invalid base variant" $(p)  ;
        }

inherited += $(.explicit-properties.$(p)) ;
    }
    property.validate $(explicit-properties) ;
    explicit-properties = [ property.refine $(inherited)
        : $(explicit-properties) ] ;

# Record explicitly specified properties for this variant. We do this after
    # inheriting parents' properties so they affect other variants derived from
    # this one.
    .explicit-properties.$(name) = $(explicit-properties) ;

feature.extend variant : $(name) ;
    feature.compose <variant>$(name) : $(explicit-properties) ;
}
IMPORT $(__name__) : variant : : variant ;

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