From 2094540085135ecf4ec79d9cd9bb2df598d8083b Mon Sep 17 00:00:00 2001
From: Sergei Trofimovich <slyfox@gentoo.org>
Date: Wed, 20 Dec 2017 12:37:04 +0000
Subject: [PATCH] sys-libs/glibc: enable IFUNC support only on whitelisted
 ARCHes, bug #641216
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Apply commit ac450135f29ef850303589af998373d936955476 to -9999 as well.
("sys-libs/glibc: enable IFUNC support only on whitelisted ARCHes, bug #641216")

Reported-by: Émeric Maschino
Bug: https://sourceware.org/PR22634
Closes: https://bugs.gentoo.org/641216
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
Package-Manager: Portage-2.3.19, Repoman-2.3.6
---
 sys-libs/glibc/glibc-9999.ebuild | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/sys-libs/glibc/glibc-9999.ebuild b/sys-libs/glibc/glibc-9999.ebuild
index 68d17a224695..a5bf3b51ebc1 100644
--- a/sys-libs/glibc/glibc-9999.ebuild
+++ b/sys-libs/glibc/glibc-9999.ebuild
@@ -342,6 +342,17 @@ glibc_do_configure() {
 	esac
 	myconf+=( --enable-stackguard-randomization )
 
+	# Keep a whitelist of targets supporing IFUNC. glibc's ./configure
+	# is not robust enough to detect proper support:
+	#    https://bugs.gentoo.org/641216
+	#    https://sourceware.org/PR22634#c0
+	case $(tc-arch ${CTARGET}) in
+		# Keep whitelist of targets where autodetection mostly works.
+		amd64|x86|sparc|ppc|ppc64|arm|arm64|s390) ;;
+		# Blacklist everywhere else
+		*) myconf+=( libc_cv_ld_gnu_indirect_function=no ) ;;
+	esac
+
 	[[ $(tc-is-softfloat) == "yes" ]] && myconf+=( --without-fp )
 
 	myconf+=( --enable-kernel=${NPTL_KERN_VER} )
-- 
2.26.2