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#!/usr/bin/python
# Copyright 2003 Vladimir Prus
# Distributed under the Boost Software License, Version 1.0.
# (See accompanying file LICENSE_1_0.txt or copy at
# http://www.boost.org/LICENSE_1_0.txt)
# Test that unused sources are at least reported.
import BoostBuild
t = BoostBuild.Tester(["-d+2"], use_test_config=False)
t.write("a.cpp", "int main() {}\n")
t.write("b.cpp", "\n")
t.write("b.xyz", "")
t.write("jamroot.jam", """\
import "class" : new ;
import modules ;
import project ;
import targets ;
import type ;
import virtual-target ;
type.register X : xyz ;
class test-target-class : basic-target
{
rule construct ( name : source-targets * : property-set )
{
local result = [ property-set.empty ] ;
if ! [ modules.peek : GENERATE_NOTHING ]
{
result += [ virtual-target.from-file b.xyz : . : $(self.project) ] ;
if ! [ modules.peek : GENERATE_ONLY_UNUSABLE ]
{
result += [ virtual-target.from-file b.cpp : . : $(self.project)
] ;
}
}
return $(result) ;
}
rule compute-usage-requirements ( rproperties : targets * )
{
return [ property-set.create <define>FOO ] ;
}
}
rule make-b-main-target
{
local project = [ project.current ] ;
targets.main-target-alternative [ new test-target-class b : $(project) ] ;
}
exe a : a.cpp b c ;
make-b-main-target ;
alias c ; # Expands to nothing, intentionally.
""")
t.run_build_system()
# The second invocation should do nothing, and produce no warning. The previous
# invocation might have printed executed actions and other things, so it is not
# easy to check if a warning was issued or not.
t.run_build_system(stdout="")
t.run_build_system(["-sGENERATE_ONLY_UNUSABLE=1"], stdout="")
# Check that even if main target generates nothing, its usage requirements are
# still propagated to dependants.
t.write("a.cpp", """\
#ifndef FOO
#error We refuse to compile without FOO being defined!
We_refuse_to_compile_without_FOO_being_defined
#endif
int main() {}
""")
t.run_build_system(["-sGENERATE_NOTHING=1"])
t.cleanup()
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