[Boost-users] [build] error: target { link%link.do-link-recursively-chrono/stopwatches-headers. } has no type

Subject: [Boost-users] [build] error: target { link%link.do-link-recursively-chrono/stopwatches-headers. } has no type
From: Nat Goodspeed (nat_at_[hidden])
Date: 2016-06-02 14:41:08

Steven, what do these errors mean, and how can I fix them?
https://travis-ci.org/BorisSchaeling/boost-process/builds/134823441

This travis script is trying to embed the candidate Boost.Process
library in a boost_1_61_0 tarball tree and build libs/process/test.

But I must admit I've been stumped by similar errors several times before.

/home/travis/build/BorisSchaeling/boost-process/boost_1_61_0/tools/build/src/build/generators.jam:1102:
in ensure-type from module generators
error: target {
link%link.do-link-recursively-chrono/stopwatches-headers. {
libs/chrono/stopwatches/include/boost. } } has no type
/home/travis/build/BorisSchaeling/boost-process/boost_1_61_0/tools/build/src/build/generators.jam:1359:
in generators.construct from module generators
/home/travis/build/BorisSchaeling/boost-process/boost_1_61_0/tools/build/src/build/targets.jam:1553:
in construct from module object(typed-target)@1725
/home/travis/build/BorisSchaeling/boost-process/boost_1_61_0/tools/build/src/build/targets.jam:1353:
in class_at_basic-target.generate from module object(typed-target)@1725
/home/travis/build/BorisSchaeling/boost-process/boost_1_61_0/tools/build/src/build/targets.jam:774:
in generate-really from module object(main-target)@1862
/home/travis/build/BorisSchaeling/boost-process/boost_1_61_0/tools/build/src/build/targets.jam:746:
in class_at_main-target.generate from module object(main-target)@1862
/home/travis/build/BorisSchaeling/boost-process/boost_1_61_0/tools/build/src/build/targets.jam:272:
in class_at_project-target.generate from module
object(project-target)@1721
/home/travis/build/BorisSchaeling/boost-process/boost_1_61_0/tools/build/src/build-system.jam:714:
in load from module build-system
/home/travis/build/BorisSchaeling/boost-process/boost_1_61_0/tools/build/src/kernel/modules.jam:295:
in import from module modules
/home/travis/build/BorisSchaeling/boost-process/boost_1_61_0/tools/build/src/kernel/bootstrap.jam:139:
in boost-build from module
/home/travis/build/BorisSchaeling/boost-process/boost_1_61_0/boost-build.jam:17:
in module scope from module