Mirko Bonadei 32ce18c062 Reland "Add RTC_EXPORT macro to export WebRTC symbols."
This is a reland of 55daf1aef65218a97eff88999e5190a2f2f6b72e.

In order to avoid problems on case insensitive file systems this CL
moves rtc_export.h to rtc_base/system (avoiding problems with build/).

Diff: https://webrtc-review.googlesource.com/c/src/+/100804/1..2.

Original change's description:
> Add RTC_EXPORT macro to export WebRTC symbols.
>
> This CL introduces the utility macro RTC_EXPORT which will let WebRTC
> developers decide which symbols are supposed to be exported/imported
> and which ones are private.
>
> RTC_EXPORT will only export/import symbols in a component build, more
> info: https://cs.chromium.org/chromium/src/docs/component_build.md.
> During a component build, the macro COMPONENT_BUILD will be globally
> defined in a consistent fashion so it is safe to rely on it to
> understand how to expand RTC_EXPORT.
> In a non component build, RTC_EXPORT will expand to nothing.
>
> Bug: webrtc:9419
> Change-Id: Ic58162783be7f5883136ade27f324d6d34fdf932
> Reviewed-on: https://webrtc-review.googlesource.com/97960
> Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
> Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
> Reviewed-by: Niels Moller <nisse@webrtc.org>
> Reviewed-by: Patrik Höglund <phoglund@webrtc.org>
> Reviewed-by: Yves Gerey <yvesg@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#24757}

Bug: webrtc:9419
Change-Id: Icfedea5fc3416ea1af2185de443fa879fb2dee8b
Reviewed-on: https://webrtc-review.googlesource.com/100804
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24766}
2018-09-18 12:07:58 +00:00

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# Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
#
# Use of this source code is governed by a BSD-style license
# that can be found in the LICENSE file in the root of the source
# tree. An additional intellectual property rights grant can be found
# in the file PATENTS. All contributing project authors may
# be found in the AUTHORS file in the root of the source tree.
import("../../webrtc.gni")
if (is_android) {
import("//build/config/android/config.gni")
import("//build/config/android/rules.gni")
}
rtc_source_set("arch") {
sources = [
"arch.h",
]
}
rtc_source_set("asm_defines") {
sources = [
"asm_defines.h",
]
}
rtc_source_set("fallthrough") {
sources = [
"fallthrough.h",
]
}
rtc_source_set("file_wrapper") {
sources = [
"file_wrapper.cc",
"file_wrapper.h",
]
deps = [
"..:checks",
"..:criticalsection",
"../..:webrtc_common",
]
}
rtc_source_set("ignore_warnings") {
sources = [
"ignore_warnings.h",
]
}
rtc_source_set("inline") {
sources = [
"inline.h",
]
}
rtc_source_set("unused") {
sources = [
"unused.h",
]
}
rtc_source_set("rtc_export") {
sources = [
"rtc_export.h",
]
}