d0b26edf30
By setting vendor_available, the following may become true: * a prebuilt library from this release may be used at runtime by in a later releasse (by vendor code compiled against this release). so this library shouldn't depend on runtime state that may change in the future. * this library may be loaded twice into a single process (potentially an old version and a newer version). The symbols will be isolated using linker namespaces, but this may break assumptions about 1 library in 1 process (your singletons will run twice). Background: This means that these modules may be built and installed twice -- once for the system partition and once for the vendor partition. The system version will build just like today, and will be used by the framework components on /system. The vendor version will build against a reduced set of exports and libraries -- similar to, but separate from, the NDK. This means that all your dependencies must also mark vendor_available. At runtime, /system binaries will load libraries from /system/lib*, while /vendor binaries will load libraries from /vendor/lib*. There are some exceptions in both directions -- bionic(libc,etc) and liblog are always loaded from /system. And SP-HALs (OpenGL, etc) may load /vendor code into /system processes, but the dependencies of those libraries will load from /vendor until it reaches a library that's always on /system. In the SP-HAL case, if both framework and vendor libraries depend on a library of the same name, both versions will be loaded, but they will be isolated from each other. It's possible to compile differently -- reducing your source files, exporting different include directories, etc. For details see: https://android-review.googlesource.com/368372 None of this is enabled unless the device opts into the system/vendor split with BOARD_VNDK_VERSION := current. Bug: 33241851 Test: build and flash internal marlin Test: m -j libsync Test: build with BOARD_VNDK_VERSION := current Change-Id: I5b23d2c1f41b842e5a9b7ea257921133b80c3f98
56 lines
1.2 KiB
Text
56 lines
1.2 KiB
Text
ndk_headers {
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name: "libsync_headers",
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from: "include/ndk",
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to: "android",
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srcs: ["include/ndk/sync.h"],
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license: "NOTICE",
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}
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ndk_library {
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name: "libsync",
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symbol_file: "libsync.map.txt",
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first_version: "26",
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}
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cc_defaults {
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name: "libsync_defaults",
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srcs: ["sync.c"],
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local_include_dirs: ["include"],
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export_include_dirs: ["include"],
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cflags: ["-Werror"],
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}
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cc_library_shared {
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name: "libsync",
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vendor_available: true,
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defaults: ["libsync_defaults"],
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}
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// libsync_recovery is only intended for the recovery binary.
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// Future versions of the kernel WILL require an updated libsync, and will break
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// anything statically linked against the current libsync.
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cc_library_static {
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name: "libsync_recovery",
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defaults: ["libsync_defaults"],
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}
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cc_test {
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name: "sync_test",
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defaults: ["libsync_defaults"],
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gtest: false,
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srcs: ["sync_test.c"],
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}
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cc_test {
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name: "sync-unit-tests",
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shared_libs: ["libsync"],
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srcs: ["tests/sync_test.cpp"],
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cflags: [
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"-g",
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"-Wall",
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"-Werror",
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"-Wno-missing-field-initializers",
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"-Wno-sign-compare",
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],
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clang: true,
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}
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