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[configure.ac.enable] Add all-powerful hook registration macro
This commit is contained in:
Behdad Esfahbod
parent
61ef0ebdc3
commit
7d39e4cbd7
1 changed files with 73 additions and 9 deletions
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@ -6,6 +6,7 @@ dnl cairo-features.h and other generated files.
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dnl
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dnl ===========================================================================
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dnl
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dnl cairo_cache_version should be increased every time that the feature
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dnl detection stuff changes in a way that removing the config.cache file may be
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@ -14,10 +15,9 @@ dnl changes; it doesn't have any effect on any other cached thing.)
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dnl
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m4_define(cairo_cache_version, 5)
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dnl ===========================================================================
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dnl
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dnl Define a macro to enable features
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dnl - Macro: _CAIRO_ENABLE_FULL (ID, NAME, ARG, TAG, DEFAULT, WHAT, COMMANDS)
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dnl - Macro: _CAIRO_ENABLE_FULL (ID, NAME, ARG, TAG, WHAT, DEFAULT, COMMANDS)
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dnl
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dnl where:
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dnl
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@ -26,10 +26,10 @@ dnl NAME is the human-readable name of the feature, eg. "FreeType font"
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dnl ARG is what enables the feature, eg. "ft" for --enable-ft
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dnl TAG is the feature conditional, eg. CAIRO_HAS_FT_FONT
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dnl WHAT is the type of feature:
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dnl "surface" for surface backends
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dnl "font" for font backends
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dnl "functions" for set of functions
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dnl "" for private configurations
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dnl "surface" for surface backends
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dnl "font" for font backends
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dnl "functions" for set of functions
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dnl "" for private configurations
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dnl DEFAULT is the default state of the feature:
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dnl "no" for experimental backends, eg. your favorite new backend
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dnl "yes" for mandatory backends, eg. png
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@ -53,9 +53,9 @@ AC_DEFUN([_CAIRO_ENABLE_FULL],
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m4_define([cr_feature_commands], [$7])
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AC_ARG_ENABLE(cr_feature_arg,
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AS_HELP_STRING([--enable-]cr_feature_arg[=@<:@no/auto/yes@:>@],
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[Enable cairo's ]cr_feature_name[ feature @<:@default=]cr_feature_default[@:>@]),
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enable_$1=$enableval, enable_$1=cr_feature_default)
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AS_HELP_STRING([--enable-]cr_feature_arg[=@<:@no/auto/yes@:>@],
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[Enable cairo's ]cr_feature_name[ feature @<:@default=]cr_feature_default[@:>@]),
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enable_$1=$enableval, enable_$1=cr_feature_default)
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case $enable_$1 in
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no)
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use_$1="no (disabled, use --enable-cr_feature_arg to enable)"
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@ -101,6 +101,10 @@ AC_DEFUN([_CAIRO_ENABLE_FULL],
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])
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])
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_CAIRO_FEATURE_HOOKS(cr_feature, cr_feature_name, cr_feature_default, cr_feature_what)
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if test "x$use_$1" = xyes; then
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CAIRO_FEATURE_VARS_FOREACH([cr_var], [[test -n "$]cr_feature[_]cr_var[" && CAIRO_]cr_var[="$]cr_feature[_]cr_var[ $CAIRO_]cr_var["]
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@ -255,6 +259,7 @@ AC_DEFUN([CAIRO_ENABLE_FUNCTIONS],
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dnl ===========================================================================
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dnl
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dnl CAIRO_FEATURE_VARS_REGISTER(VARS, INITIAL-VALUE=[])
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dnl
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@ -283,6 +288,65 @@ AC_DEFUN([CAIRO_FEATURE_VARS_FOREACH],
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m4_foreach_w([$1], m4_expand(CAIRO_FEATURE_VARS), [$2])
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])
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dnl ===========================================================================
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m4_define([_CAIRO_FEATURE_HOOK_MATCH],
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[
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m4_case([$1],
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[*], [$3],
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[$2], [$3],
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[!$2], ,
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[m4_bmatch([$1], [^!], [$3])])
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])
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m4_define([_CAIRO_FEATURE_HOOKS])
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dnl
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dnl CAIRO_FEATURE_HOOK_REGISTER(WHAT, DEFAULT, COMMANDS)
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dnl
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dnl Runs COMMANDS for features matching WHAT and DEFAULT.
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dnl
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dnl WHAT and DEFAULT are matched like this:
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dnl [*] matches all values
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dnl [val] matches [val]
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dnl [!val] matches anything other than [val]
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dnl
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dnl The following macros can be used in COMMANDS:
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dnl
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dnl cr_feature expands to the feature id, eg "ft"
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dnl cr_feature_name expands to the human-readable name of the feature, eg. "FreeType font"
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dnl cr_feature_default expands to the default state of the feature:
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dnl "no" for experimental backends, eg. your favorite new backend
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dnl "yes" for mandatory backends, eg. png
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dnl "auto" for other supported backends, eg. xlib
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dnl cr_what expands to the type of feature:
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dnl "surface" for surface backends
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dnl "font" for font backends
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dnl "functions" for set of functions
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dnl "" for private configurations
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dnl
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dnl These four values are also set as $1 to $4. To know if feature was
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dnl enabled, compare $use_$1 to string "yes". As in:
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dnl
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dnl AS_IF([test "x$use_$1" = "xyes"],
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dnl [
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dnl code goes here...
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dnl ])
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dnl
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dnl Hooks are run for each feature in the order they are added.
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dnl
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AC_DEFUN([CAIRO_FEATURE_HOOK_REGISTER],
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[
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m4_append([_CAIRO_FEATURE_HOOKS],
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[
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_CAIRO_FEATURE_HOOK_MATCH(m4_expand([$1]), cr_feature_what,
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[_CAIRO_FEATURE_HOOK_MATCH(m4_expand([$2]), cr_feature_default,
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[$3]
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)])
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], m4_newline)
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])
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dnl ===========================================================================
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dnl
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dnl Report
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