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Diffstat (limited to 'libbuild2/context.hxx')
| -rw-r--r-- | libbuild2/context.hxx | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/libbuild2/context.hxx b/libbuild2/context.hxx index c93c1c9..7ac4af4 100644 --- a/libbuild2/context.hxx +++ b/libbuild2/context.hxx @@ -411,6 +411,9 @@ namespace build2 // const variable* var_extension; + // Note that this variable can also be specified as prerequisite-specific + // (see the `include` variable for details). + // // [bool] target visibility // const variable* var_clean; @@ -450,6 +453,15 @@ namespace build2 // A rule with the "pass-through" semantics should treat the adhoc value // the same as true. // + // Sometimes it may be desirable to apply exclusions only to specific + // operations. The initial idea was to extend this value to allow + // specifying the operation (e.g., clean@false). However, later we + // realized that we could reuse the "operation variables" (clean, install, + // test) with a more natural-looking result. Note that currently we only + // recognize the built-in clean variable (for other variables we will need + // some kind of registration in an operation-to-variable map, probably in + // root scope). + // // To query this value in rule implementations use the include() helpers // from <libbuild2/prerequisites.hxx>. // |