Modified source engine (2017) developed by valve and leaked in 2020. Not for commercial purporses
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# encoding: utf-8
# xshlib.py -- advanced linking utils
# Copyright (C) 2019 mittorn
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
from waflib import Logs, Utils, TaskGen, Task
from waflib.Tools import ccroot, c, cxx
MAIN_BINARY = 'xash'
def options(opt):
opt.add_option('--static-linking', action='store', dest='STATIC_LINKING', default=None)
def configure(conf):
if conf.options.STATIC_LINKING:
conf.find_program('ld')
conf.find_program('objcopy')
conf.env.STATIC_LINKING = conf.options.STATIC_LINKING
conf.add_os_flags('LD_RELOCATABLE_FLAGS')
def build(bld):
if bld.env.STATIC_LINKING:
apply_static(MAIN_BINARY,*bld.env.STATIC_LINKING.split(','))
class objcopy_relocatable_lib(Task.Task):
"remove all exports except of lib_${NAME}_exports"
no_errcheck_out = True
run_str = '${OBJCOPY} -G lib_${NAME}_exports ${SRC[0].abspath()} ${TGT[0].abspath()}'
def keyword(self):
return 'ObjCopy'
class xshlib(ccroot.link_task):
"make relocatable library"
no_errcheck_out = True
run_str = '${LD} -r -o ${TGT[0].abspath()} ${LD_RELOCATABLE_FLAGS} ${CCLNK_SRC_F}${SRC}'
def add_target(self, target):
"create objcopy task for target"
if not self.env.LD_RELOCATABLE_FLAGS:
self.env.LD_RELOCATABLE_FLAGS = []
if '-m32' in self.env.LINKFLAGS:
self.env.LD_RELOCATABLE_FLAGS.append('-melf_i386')
base = self.generator.path
target_unstripped = base.find_or_declare('%s.unstripped.o'% target)
target_stripped = base.find_or_declare('%s.o'% target)
self.set_outputs(target_unstripped)
self.generator.objcopy_task= self.generator.create_task('objcopy_relocatable_lib', target_unstripped, target_stripped)
self.generator.objcopy_task.env['NAME'] = target
class cprogram_static(c.cprogram):
"build static c program"
run_str = '${LINK_CC} -static ${LINKFLAGS} ${CCLNK_SRC_F}${SRC} ${CCLNK_TGT_F}${TGT[0].abspath()} ${RPATH_ST:RPATH} ${FRAMEWORKPATH_ST:FRAMEWORKPATH} ${FRAMEWORK_ST:FRAMEWORK} ${ARCH_ST:ARCH} ${STLIB_MARKER} ${STLIBPATH_ST:STLIBPATH} ${STLIB_ST:STLIB} ${STLIB_MARKER} ${LIBPATH_ST:LIBPATH} ${LIB_ST:LIB} ${LDFLAGS}'
class cxxprogram_static(cxx.cxxprogram):
"build static cxx program"
run_str = '${LINK_CXX} -static ${LINKFLAGS} ${CXXLNK_SRC_F}${SRC} ${CXXLNK_TGT_F}${TGT[0].abspath()} ${RPATH_ST:RPATH} ${FRAMEWORKPATH_ST:FRAMEWORKPATH} ${FRAMEWORK_ST:FRAMEWORK} ${ARCH_ST:ARCH} ${STLIB_MARKER} ${STLIBPATH_ST:STLIBPATH} ${STLIB_ST:STLIB} ${STLIB_MARKER} ${LIBPATH_ST:LIBPATH} ${LIB_ST:LIB} ${LDFLAGS}'
# usevars are same
ccroot.USELIB_VARS['cprogram_static'] = ccroot.USELIB_VARS['cxxprogram_static'] = ccroot.USELIB_VARS['cxxprogram']
def apply_static(main, *reloc):
"apply xshlib tasks and generate files"
def write_libraries_list(out_node):
"generate library list"
libraries = reloc
externs = '\n'.join(['extern table_t lib_%s_exports[];' % e for e in libraries])
table = '\n'.join(['{ "%s", &lib_%s_exports },' % (e, e) for e in libraries])
out_node.write('%s\nstruct {const char *name;void *func;} libs[] = {\n%s\n{0,0}\n};\n' % (externs, table ))
def write_export_list(name, in_node, out_node):
"generate exports list for library"
exports = in_node.read().splitlines()
externs = '\n'.join(['extern void %s(void);' % e for e in exports])
table = '\n'.join(['{ "%s", &%s },' % (e, e) for e in exports])
out_node.write('%s\nstruct {const char *name;void *func;} lib_%s_exports[] = {\n%s\n{0,0}\n};\n' % (externs, name, table ))
@TaskGen.feature('cshlib', 'cxxshlib')
@TaskGen.before('process_source', 'propogate_uselib_vars')
def apply_xshlib(self):
"apply xshlib feature and inject link_helper.c to sources"
if self.name in reloc:
for k in ('cshlib', 'cxxshlib'):
if k in self.features:
self.features.remove(k)
self.features.append('xshlib')
in_node = self.path.get_src().make_node('exports.txt')
bldnode = self.path.get_bld()
bldnode.mkdir()
out_node = bldnode.make_node('link_helper.c')
write_export_list(self.name,in_node, out_node)
self.source = Utils.to_list(self.source) + [out_node]
@TaskGen.feature('cshlib', 'cxxshlib', 'cprogram', 'cxxprogram', 'cprogram_static', 'cxxprogram_static')
@TaskGen.before('process_source')
def add_deps(self):
"add all relocatable objects to main binary source list"
if self.name == main:
write_libraries_list(self.path.get_bld().make_node('generated_library_tables.h'))
for t in reloc:
self.source += [self.bld.get_tgen_by_name(t).objcopy_task.outputs[0]]