9990de1f64
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
(cherry picked from commit d0b26edf30)
Merged-In: I5b23d2c1f41b842e5a9b7ea257921133b80c3f98
Change-Id: I5b23d2c1f41b842e5a9b7ea257921133b80c3f98
42 lines
951 B
Text
42 lines
951 B
Text
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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