From 4baff3044a1a52cad870d6316b6c429e992bfaca Mon Sep 17 00:00:00 2001
From: Sylvestre Ledru <sylvestre@debian.org>
Date: Mon, 26 Jun 2023 10:13:30 +0200
Subject: [PATCH] only pass no-symbolic if it exists in ld.gold

---
 debian/changelog |  6 ++++++
 debian/rules     | 11 ++++++++---
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/debian/changelog b/debian/changelog
index f2369481..64abe7bd 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+llvm-toolchain-15 (1:15.0.7-6) UNRELEASED; urgency=medium
+
+  * Only pass -Bno-symbolic if it exists
+
+ -- Sylvestre Ledru <sylvestre@debian.org>  Mon, 26 Jun 2023 10:13:40 +0200
+
 llvm-toolchain-15 (1:15.0.7-5) unstable; urgency=medium
 
   [ Graham Inggs ]
diff --git a/debian/rules b/debian/rules
index bc0a9d65..774e3d9b 100755
--- a/debian/rules
+++ b/debian/rules
@@ -177,9 +177,6 @@ ifneq (,$(filter $(DEB_HOST_ARCH),i386))
   STAGE_ALL_CMAKE_EXTRA += -DLLVM_HOST_TRIPLE=i386-linux-gnu
 endif
 
-# https://bugs.launchpad.net/bugs/2016471
-STAGE_2_CMAKE_EXTRA += -DLIBOMP_LDFLAGS=-Wl,-Bno-symbolic
-
 ifneq (,$(filter $(DEB_HOST_ARCH),i386))
 # Sometimes, i386 needs help with the triple
   CMAKE_EXTRA += -DLLVM_HOST_TRIPLE=i386-linux-gnu
@@ -422,6 +419,14 @@ else
 endif
 endif
 
+# https://bugs.launchpad.net/bugs/2016471
+ifeq (,$(filter-out $(LTO_DISABLE_ARCHS), $(DEB_HOST_ARCH)))
+LD_GOLD_SUPPORTS_NO_SYMBOLIC := $(shell ld.gold --help | grep -q -w '-Bno-symbolic' && echo "yes" || echo "no")
+ifeq ($(LD_GOLD_SUPPORTS_NO_SYMBOLIC),yes)
+    STAGE_2_CMAKE_EXTRA += -DLIBOMP_LDFLAGS=-Wl,-Bno-symbolic
+endif
+endif
+
 DH_OPTIONS=
 OCAML_ENABLE= no
 OCAML_ARCHS := amd64 arm64 armhf ppc64el riscv64 s390x