SCons code generation and VariantDir -


i scons generate source files me in src/ directory, , build them other source file in build directory build/variantx.

this scons file:

import scons  def my_builder(env, target, source):     # stuff     pass  env = environment() env.variantdir('build/variant1/', 'src', duplicate=0) env.command('src/foobar.cc', 'src/foobar.input', action=my_builder) env.program('bin/test', [     'build/variant1/foobar.cc',     'build/variant1/test.cc',     ])

this errors following message:

source src/foobar.cc not found, needed target build/variant1/foobar.o

which don't think correct, considering indeed providing command build src/foobar.cc.

now, tried few workarounds:

  • if replace build/variant1/foobar.cc in program src/foobar.cc, work, foobar.o gets created in src/ rather build/variant1

  • if replace src/foobar.cc in command build/variant1/foobar.cc, work, code generated in src/; (also because things relative paths in include directories won't work unless duplicate=1)

  • if duplicate=1, similar error message, time mentioning variant directory:

    source build/variant1/foobar.cc not found, needed target build/variant1/foobar.o

is there way around this? limitation/bug in scons, or there fundamental misunderstanding on side?

i suggest creating explicit dependency between command() , program() calls follows:

target1 = env.command('src/foobar.cc', 'src/foobar.input', action=my_builder) target2 = env.program('bin/test', [                       'build/variant1/foobar.cc',                       'build/variant1/test.cc',                       ]) depends(target2, target1) # should work # depends(target2, "src/foobar.cc")

or specify target command() part of source program() follows:

target1 = env.command('src/foobar.cc', 'src/foobar.input', action=my_builder) env.program('bin/test', [             target1,             'build/variant1/test.cc',             ])

i havent tested this, im not sure how work in conjunction call variantdir()

here info regarding generating source code scons.


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