QMAKE_EXTRA_COMPILERS: single command for multiple targets

ivan.ilin

Hi. I'm trying to integrate Shiboken generator into make process. For example there is simple description for my extra compiler in .pro file:
@GENERATED_SOURCES = wrappers/class1_wrapper.cpp
wrappers/class2_wrapper.cpp

SHIBOKEN_FILE = . # Need to give some bogus input
SHIBOKEN.input = SHIBOKEN_FILE
SHIBOKEN.output = $$GENERATED_SOURCES
SHIBOKEN.commands = shiboken <bla-bla-bla>
SHIBOKEN.variable_out = SOURCES

QMAKE_EXTRA_COMPILERS += SHIBOKEN@

QMake generates the following Makefile's fragment:
@wrappers/class1_wrapper.cpp: .
shiboken <bla-bla-bla>@

But there is no rule for class2_wrappers.cpp! It took only the first item of GENERATED_SOURCES list.
It works fine when compilation process has 1 job. But if I run it with several jobs (e.g. make -j4), it will fail with
@
make: *** No rule to make target wrappers/class2_wrapper.cpp', needed by debug/.obj/wrappers/class2_wrapper.o'. Stop.
make: *** Waiting for unfinished jobs....
@

It happens because a free job tries to compile class2_wrappers.cpp before shiboken has finished. So if I try to run make -j4 again, it will compile successfully. Of course, files listed in GENERATED_SOURCES do not exist before shiboken invocation.
Is there any feature to specify one command for multiple targets? I mean, it should work like moc but moc is called once for each target, and I want to run the command once for several targets. I found only "combine" feature:
@SHIBOKEN.CONFIG += combine@

but it's opposite to what I need.

ivan.ilin

I solved it via Makefile target pattern. Also, there is a trick with the SOURCES variable. QMake doesn't like when some source files don't exist :-)
I've put an empty %_wrapper.cpp next to Makefile as qmake includes it into SOURCES.
Here is simple code:

@
GENERATED_SOURCES = wrappers/class1_wrapper.cpp
wrappers/class2_wrapper.cpp

defineReplace(shibokenWorkaround) {
SOURCES += $$GENERATED_SOURCES
return("%_wrapper.cpp")
}

SHIBOKEN_FILE = . # Need to give some bogus input
SHIBOKEN.input = SHIBOKEN_FILE
SHIBOKEN.output_function = shibokenWorkaround
SHIBOKEN.commands = shiboken <bla-bla-bla>
SHIBOKEN.CONFIG = no_link # don't add the .cpp target file to OBJECTS
SHIBOKEN.clean = dummy # don't remove the %_wrapper.cpp file by "make clean"

QMAKE_EXTRA_COMPILERS += SHIBOKEN
@