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169 lines
7.0 KiB
Python
169 lines
7.0 KiB
Python
#
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# Original file is located at:
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# https://github.com/RobotLocomotion/drake/blob/bad032aeb09b13c7f8c87ed64b624c8d1e9adb30/tools/workspace/generate_export_header.bzl
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#
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# All components of Drake are licensed under the BSD 3-Clause License
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# shown below. Where noted in the source code, some portions may
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# be subject to other permissive, non-viral licenses.
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#
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# Copyright 2012-2016 Robot Locomotion Group @ CSAIL
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met:
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#
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# Redistributions of source code must retain the above copyright notice,
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# this list of conditions and the following disclaimer. Redistributions
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# in binary form must reproduce the above copyright notice, this list of
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# conditions and the following disclaimer in the documentation and/or
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# other materials provided with the distribution. Neither the name of
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# the Massachusetts Institute of Technology nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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# -*- python -*-
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# Defines the implementation actions to generate_export_header.
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def _generate_export_header_impl(ctx):
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windows_constraint = ctx.attr._windows_constraint[platform_common.ConstraintValueInfo]
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output = ctx.outputs.out
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if ctx.target_platform_has_constraint(windows_constraint):
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export_attr = "__declspec(dllexport)"
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import_attr = "__declspec(dllimport)"
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no_export_attr = ""
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deprecated_attr = "__declspec(deprecated)"
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else:
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export_attr = "__attribute__((visibility(\"default\")))"
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import_attr = "__attribute__((visibility(\"default\")))"
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no_export_attr = "__attribute__((visibility(\"hidden\")))"
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deprecated_attr = "__attribute__((__deprecated__))"
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content = [
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"#ifndef %s_H" % ctx.attr.export_macro_name,
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"#define %s_H" % ctx.attr.export_macro_name,
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"",
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"#ifdef %s" % ctx.attr.static_define,
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"# define %s" % ctx.attr.export_macro_name,
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"# define %s" % ctx.attr.no_export_macro_name,
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"#else",
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"# ifndef %s" % ctx.attr.export_macro_name,
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"# ifdef %s" % ctx.attr.export_import_condition,
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"# define %s %s" % (ctx.attr.export_macro_name, export_attr),
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"# else",
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"# define %s %s" % (ctx.attr.export_macro_name, import_attr),
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"# endif",
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"# endif",
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"# ifndef %s" % ctx.attr.no_export_macro_name,
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"# define %s %s" % (ctx.attr.no_export_macro_name, no_export_attr),
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"# endif",
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"#endif",
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"",
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"#ifndef %s" % ctx.attr.deprecated_macro_name,
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"# define %s %s" % (ctx.attr.deprecated_macro_name, deprecated_attr),
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"#endif",
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"",
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"#ifndef %s" % ctx.attr.export_deprecated_macro_name,
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"# define %s %s %s" % (ctx.attr.export_deprecated_macro_name, ctx.attr.export_macro_name, ctx.attr.deprecated_macro_name), # noqa
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"#endif",
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"",
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"#ifndef %s" % ctx.attr.no_export_deprecated_macro_name,
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"# define %s %s %s" % (ctx.attr.no_export_deprecated_macro_name, ctx.attr.no_export_macro_name, ctx.attr.deprecated_macro_name), # noqa
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"#endif",
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"",
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"#endif",
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]
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ctx.actions.write(output = output, content = "\n".join(content) + "\n")
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# Defines the rule to generate_export_header.
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_generate_export_header_gen = rule(
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attrs = {
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"out": attr.output(mandatory = True),
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"export_import_condition": attr.string(),
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"export_macro_name": attr.string(),
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"deprecated_macro_name": attr.string(),
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"export_deprecated_macro_name": attr.string(),
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"no_export_macro_name": attr.string(),
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"no_export_deprecated_macro_name": attr.string(),
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"static_define": attr.string(),
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"_windows_constraint": attr.label(default = "@platforms//os:windows"),
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},
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output_to_genfiles = True,
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implementation = _generate_export_header_impl,
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)
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def generate_export_header(
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lib = None,
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name = None,
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out = None,
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export_import_condition = None,
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export_macro_name = None,
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deprecated_macro_name = None,
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export_deprecated_macro_name = None,
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no_export_macro_name = None,
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no_export_deprecated_macro_name = None,
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static_define = None,
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**kwargs):
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"""
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Creates a rule to generate an export header for a named library.
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This is an incomplete implementation of CMake's generate_export_header. (In
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particular, it assumes a platform that uses
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__attribute__((visibility("default"))) to decorate exports.)
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By default, the rule will have a mangled name related to the library name,
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and will produce "<lib>_export.h".
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The CMake documentation of the generate_export_header macro is:
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https://cmake.org/cmake/help/latest/module/GenerateExportHeader.html
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"""
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if name == None:
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name = "__%s_export_h" % lib
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if out == None:
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out = "%s_export.h" % lib
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if export_import_condition == None:
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# CMake does not uppercase the <lib>_EXPORTS define.
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export_import_condition = "%s_EXPORTS" % lib
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if export_macro_name == None:
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export_macro_name = "%s_EXPORT" % lib.upper()
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if deprecated_macro_name == None:
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deprecated_macro_name = "%s_DEPRECATED" % lib.upper()
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if export_deprecated_macro_name == None:
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export_deprecated_macro_name = "%s_DEPRECATED_EXPORT" % lib.upper()
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if no_export_macro_name == None:
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no_export_macro_name = "%s_NO_EXPORT" % lib.upper()
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if no_export_deprecated_macro_name == None:
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no_export_deprecated_macro_name = \
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"%s_DEPRECATED_NO_EXPORT" % lib.upper()
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if static_define == None:
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static_define = "%s_STATIC_DEFINE" % lib.upper()
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_generate_export_header_gen(
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name = name,
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out = out,
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export_import_condition = export_import_condition,
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export_macro_name = export_macro_name,
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deprecated_macro_name = deprecated_macro_name,
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export_deprecated_macro_name = export_deprecated_macro_name,
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no_export_macro_name = no_export_macro_name,
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no_export_deprecated_macro_name = no_export_deprecated_macro_name,
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static_define = static_define,
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**kwargs
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)
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