Header generation + compile not working as expected

[MartinSchwarzbauer]

Hi *!

Following situation:
On each "compile" i generate a header file using an external utils: header_gen.h

I followed instruction from here: https://mesonbuild.com/FAQ.html#how-do-i-tell-meson-that-my-sources-use-generated-headers

my_generator = find_program('my_generator')
generated_h = custom_target(
    'generate headers',
    output : 'generated.h',
    build_by_default: true,
    install: false,
    command : [my_generator, meson.source_root() + '/doc/error_definition.xml', meson.source_root() + '/inc/header_generated.h'],
)

The header_generated.h is only generated, when the output file differs =>otherwise i don't touch the output file in my generator source.

my_lib = static_library(
    'my_lib',
    sources: [my_lib_src + generated_h,
    include_directories: [mylib_inc, my_lib_inc_priv],
    dependencies: my_lib_deps,
    install: not(meson.is_subproject())
)

Now the following happens:
=> buidling 'my_lib' invoked the generator => BUT a changed generated header file doesn't cause my lib to be rebuilt! This is done when i compile a second time!

What am i doing wrong?

Meson version: 1.3.1

My expectation:
I compile my_lib => header is generated (if header file changed) => my_lib should be built! Otherwise not

[MartinSchwarzbauer]

Sorry problem solved => using '@input@' and '@output@' did the trick! Sorry!