No 'objectfile' build target available

[keith-packard]

I'm building a C library, one of the installed files is 'crt0.o'. I didn't find a direct build target to construct this, but did manage to hack up executable() to work for now by adding flags to the link and compile arguments.

What I think would work is an 'objectfile' target which just took a single source file, along with
the usual compiler and install parameters.

For reference, here's how I'm calling executable for my use:

executable(crt_name,
	     srcs_picocrt,
	     include_directories : inc,
	     install : true,
	     install_dir : instdir,
	     c_args : value[1] + ['-fno-builtin', '-ffreestanding'],
	     link_args : value[1] + ['-r', '-ffreestanding', '-nostdlib'])

[jpakkane]

For maximum control you might want to use a custom target, something like:

custom_target('crtobj',
    input: 'crt0.c',
    output: 'crt0.o',
    command: [meson.get_compiler('c'), '-c', '-o', '@OUTPUT@', '@INPUT@', ...],
    install: true,
    install_dir: ...)

Granted this may get a bit tricky if you have a lot of include dirs. An alternative approach is to build the target as a static library and then create a custom install script that installs the object file from the private directory.

And since you seem to be doing partial linking, you might be interested in #5499. Comments welcome.

[keith-packard]

thanks, I'll experiment with this.