Don't skip install targets if there's <build>no in ureqs

src/tools/stage.jam

@@ -478,6 +478,10 @@ class install-target-class : basic-target
         return [ sequence.unique $(result2) ] ;
     }
 
+    rule skip-from-usage-requirements ( )
+    {
+    }
+
     # Returns true iff 'type' is subtype of some element of 'types-to-include'.
     #
     local rule include-type ( type : types-to-include * )

test/install_build_no.py

@@ -0,0 +1,26 @@
+#!/usr/bin/python
+
+# Copyright 2021 Dmitry Arkhipov (grisumbras@gmail.com)
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE.txt or https://www.bfgroup.xyz/b2/LICENSE.txt)
+
+# Check that <build>no in usage-requirements of dependencies does not affect
+# install rule, i.e. a skipped installed target does not affect insallation of
+# other targets.
+
+import BoostBuild
+
+t = BoostBuild.Tester()
+
+t.write("a.cpp", "int main() {}\n")
+
+t.write("jamroot.jam", """
+make x : : maker : <build>no ;
+exe a : a.cpp ;
+install install : x a ;
+""")
+
+t.run_build_system()
+t.expect_addition("install/a.exe")
+
+t.cleanup()

test/test_all.py

@@ -250,6 +250,7 @@ def reorder_tests(tests, first_test):
          "inherit_toolset",
          "inherited_dependency",
          "inline",
+         "install_build_no",
          "libjpeg",
          "liblzma",
          "libpng",