rules.ninja only defines rules. Up to ninja 1.5.x, include
and subninja do the same thing for ninja files that only define
rules.
In ninja 1.6, we hope to change rules to be scoped to the current
subninja ( https://github.com/martine/ninja/pull/921 ). With that
change, subninja rules.ninja would define the rules in a new scope
that closes at the end of the line and all the rules in rules.ninja
would be ignores. include won't introduce a new scope and instead
add the rules in the context of the parent build.ninja file.
This change should have no effect on ninja up to 1.5.x, and it should
keep the build working as previously with newer ninja versions.
rules.ninja only defines rules. Up to ninja 1.5.x, include and subninja do the same thing for ninja files that only define rules.
In ninja 1.6, we hope to change rules to be scoped to the current subninja ( https://github.com/martine/ninja/pull/921 ). With that change,
subninja rules.ninjawould define the rules in a new scope that closes at the end of the line and all the rules in rules.ninja would be ignores.includewon't introduce a new scope and instead add the rules in the context of the parent build.ninja file.This change should have no effect on ninja up to 1.5.x, and it should keep the build working as previously with newer ninja versions.