gecko-dev/config/make-system-wrappers.py

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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
from __future__ import print_function
import os
from mozbuild.util import FileAvoidWrite
header_template = '''#pragma GCC system_header
#pragma GCC visibility push(default)
{includes}
#pragma GCC visibility pop
'''
include_next_template = '#include_next <{header}>'
# The 'unused' arg is the output file from the file_generate action. We actually
# generate all the files in header_list
def gen_wrappers(unused, outdir, *header_list):
for header in header_list:
with FileAvoidWrite(os.path.join(outdir, header)) as f:
includes = include_next_template.format(header=header)
if header == 'wayland-util.h':
# wayland-util.h in Wayland < 1.12 includes math.h inside an
# extern "C" block, which breaks including the header from C++.
# This was fixed in Wayland 1.12, but for versions earlier than
# that, we work around that by force-including math.h first.
includes = '#include <math.h>\n' + includes
elif header == 'wayland-client.h':
# The system wayland-client.h uses quote includes for
# wayland-util.h, which means wayland-util.h is picked from the
# directory containing wayland-client.h first, and there's no
# way around that with -I, -isystem, or other flags. So, we
# force to include it from our wrapper, before including the
# system header, so that our wayland-util.h wrapper is picked
# first.
includes = '#include "wayland-util.h"\n' + includes
f.write(header_template.format(includes=includes))