source: mainline/meson/part/exports/meson.build@ 2298fc4

#
# Copyright (c) 2019 Jiří Zárevúcky
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#
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# modification, are permitted provided that the following conditions
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# - Redistributions of source code must retain the above copyright
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## Generate config.mk, config.sh

# Get the directory where the compiler resides.

cc_fullname = run_command(which, meson.get_compiler('c').cmd_array()[0].split(' ')[0], check: true).stdout().strip()
cc_path = run_command(dirname, cc_fullname, check: true).stdout().strip()

message(['Compiler directory is:', cc_path])

export_cppflags = [
        '-isystem', '$(HELENOS_EXPORT_ROOT)/include/libposix',
        '-isystem', '$(HELENOS_EXPORT_ROOT)/include/libc',
        '-idirafter', '$(HELENOS_EXPORT_ROOT)/include',
]

export_ldflags = [
        '-nostdlib',
        '-L$(HELENOS_EXPORT_ROOT)/lib',
        '-Wl,--whole-archive',
        '$(HELENOS_EXPORT_ROOT)/lib/libstartfiles.a',
        '-Wl,--no-whole-archive',
]

export_ldlibs = [
        '-Wl,--as-needed',
        '-lposix',
        '-lmath',
        '-lc',
        '-lgcc',
        '-Wl,--no-as-needed',
]

cc_arch = meson.get_cross_property('cc_arch')

conf_data = configuration_data({
        'HELENOS_OVERLAY_PATH' : meson.source_root() / 'uspace/overlay',
        'HELENOS_CROSS_PATH' : cc_path,
        'HELENOS_ARCH' : cc_arch,
        'HELENOS_CFLAGS' : ' '.join(arch_uspace_c_args),
        'HELENOS_CXXFLAGS' : ' '.join(arch_uspace_c_args),
        'HELENOS_CPPFLAGS' : ' '.join(export_cppflags),
        'HELENOS_LDFLAGS' : ' '.join(export_ldflags),
        'HELENOS_LDLIBS' : ' '.join(export_ldlibs),
        'HELENOS_TARGET' : cc_arch + '-helenos',
})

config_mk = configure_file(
        input: 'config.mk.in',
        output: 'config.mk',
        configuration: conf_data,
)

config_sh = custom_target('config.sh',
        input: config_mk,
        output: 'config.sh',
        command: [ sed, 's:$(HELENOS_EXPORT_ROOT):${HELENOS_EXPORT_ROOT}:g', '@INPUT@' ],
        capture: true,
)