[Buildroot] [git commit branch/2017.02.x] toolchain: disable PIE for static build with musl

[Peter Korsgaard]

commit: https://git.buildroot.net/buildroot/commit/?id=ca4feb41937139de5d742502ecb428930205f777
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/2017.02.x

As mentioned in commit 3c93901bcd2 (toolchain: add hidden symbol for PIE
support), support for static PIE using musl requires a gcc patch[1]. Buildroot
doesn't carry this patch. Don't enable BR2_TOOLCHAIN_SUPPORTS_PIE in static
build with musl.

Fixes:
http://autobuild.buildroot.net/results/d19/d19bcfcfb33cc5f5b082b97bbd5852d479823b97/
http://autobuild.buildroot.net/results/91f/91f7c6954c337b03f5ac141050d9b1bee1623376/
http://autobuild.buildroot.net/results/996/996116da9241686110b9525eed08cc5acfd379a6/

[1] https://github.com/richfelker/musl-cross-make/blob/b854a42fc1ea19b8c4ec7104848f9d1a6d7995f0/patches/gcc-6.3.0/0010-static-pie-support.diff

Acked-by: Waldemar Brodkorb <wbx at openadk.org>
Signed-off-by: Baruch Siach <baruch at tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
(cherry picked from commit fa397537bb64536bb58663df886b1a2c8886961c)
Signed-off-by: Peter Korsgaard <peter at korsgaard.com>
---
 toolchain/Config.in | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/toolchain/Config.in b/toolchain/Config.in
index de01585..92a4926 100644
--- a/toolchain/Config.in
+++ b/toolchain/Config.in
@@ -28,7 +28,7 @@ config BR2_TOOLCHAIN_USES_MUSL
 	select BR2_TOOLCHAIN_HAS_THREADS
 	select BR2_TOOLCHAIN_HAS_THREADS_DEBUG
 	select BR2_TOOLCHAIN_HAS_THREADS_NPTL
-	select BR2_TOOLCHAIN_SUPPORTS_PIE
+	select BR2_TOOLCHAIN_SUPPORTS_PIE if !BR2_STATIC_LIBS
 
 choice
 	prompt "Toolchain type"