tree 7b88d70992d29306dcccdec55c22cc940f56c802
parent d8f6950828df9959c84a659377214266d64be68e
author Shoaib Meenai <smeenai@fb.com> 1580174981 -0800
committer Shoaib Meenai <smeenai@fb.com> 1580250984 -0800

[libcxx] Link against android_support when needed

libc++ on Android needs to be linked against libandroid_support on API
levels less than 21 to provide needed functions that aren't in the libc
on those platforms (e.g. posix_memalign for libcxxabi). libc++ from the
NDK is a linker script that pulls in libandroid_support, but for
building libc++ itself, we need to explicitly add libandroid_support as
a dependency. Moreover, libc++ headers reference the functions provided
by libandroid_support, so it needs to be added as a public dependency.

Differential Revision: https://reviews.llvm.org/D73516