diff options
author | Boris Kolpackov <boris@codesynthesis.com> | 2018-06-28 09:44:15 +0200 |
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committer | Boris Kolpackov <boris@codesynthesis.com> | 2018-06-28 09:44:15 +0200 |
commit | 3cc5e3bd441fc9d18fece3d9e99fae75c78438e7 (patch) | |
tree | a9a08c453370847e0d352d47e19fbfcb7cc757ef /build2/prerequisite.ixx | |
parent | c0f72d47fc25981dcc1f55e12dfa0fdba7b70242 (diff) |
Implement support for excluded and ad hoc prerequisites
The inclusion/exclusion is controlled via the 'include' prerequisite-specific
variable. Valid values are:
false - exclude
true - include
adhoc - include but treat as an ad hoc input
For example:
lib{foo}: cxx{win32-utility}: include = ($cxx.targe.class == 'windows')
exe{bar}: libs{plugin}: include = adhoc
Diffstat (limited to 'build2/prerequisite.ixx')
-rw-r--r-- | build2/prerequisite.ixx | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/build2/prerequisite.ixx b/build2/prerequisite.ixx new file mode 100644 index 0000000..aeec6b4 --- /dev/null +++ b/build2/prerequisite.ixx @@ -0,0 +1,31 @@ +// file : build2/prerequisite.ixx -*- C++ -*- +// copyright : Copyright (c) 2014-2018 Code Synthesis Ltd +// license : MIT; see accompanying LICENSE file +namespace build2 +{ + include_type + include_impl (action, + const target&, + const string&, + const prerequisite&, + const target*); + + extern const variable* var_include; // context.cxx + + inline include_type + include (action a, const target& t, const prerequisite& p, const target* m) + { + // Most of the time this variable will not be specified, so let's optimize + // for that. + // + if (p.vars.empty ()) + return true; + + const string* v (cast_null<string> (p.vars[var_include])); + + if (v == nullptr) + return true; + + return include_impl (a, t, *v, p, m); + } +} |