commit 8874d880839761bf722b5a025940823172894c0a
author Greg Hackmann <ghackmann@google.com> Tue Oct 31 13:25:03 2017 -0700
committer Greg Hackmann <ghackmann@google.com> Tue Oct 31 13:52:45 2017 -0700
tree 9343d9598a76c3493da3cba318630426d6cc4754
parent 6c1d23f059986e4ee6f52c44a4944089aae9181d

elf.h: add STN_UNDEF

ELF uses index STN_UNDEF = 0 for undefined symbols.  glibc and musl
define this constant in elf.h, and it's needed to build the kernel's
vDSO selftest suite.

Test: Overwrite elf.h in standalone NDK toolchain, then
	cd $kernel/tools/testing/selftests/vDSO && \
	make CC="aarch64-linux-android-gcc -pie" vdso_test
Change-Id: I495586e9ca43d2f0d148ded9f4bd61ec8d14d53b
Signed-off-by: Greg Hackmann <ghackmann@google.com>

libc/include/elf.h

diff --git a/libc/include/elf.h b/libc/include/elf.h
index 4181006..644be17 100644
--- a/libc/include/elf.h
+++ b/libc/include/elf.h
@@ -198,6 +198,8 @@
 #define SHT_LOOS    0x60000000
 #define SHT_HIOS    0x6fffffff
 
+#define STN_UNDEF     0
+
 #define STT_GNU_IFUNC 10
 #define STT_LOOS      10
 #define STT_HIOS      12