crosstool-ng/packages/gcc/13.3.0/0013-libgcc-Exclude-UCLIBC-from-GLIBC-thread-check.patch

From 4931e2e89fd5edb3fb222132519e0ed731d644ef Mon Sep 17 00:00:00 2001
From: Chris Packham <chris.packham@alliedtelesis.co.nz>
Date: Thu, 7 Sep 2023 19:26:49 +1200
Subject: [PATCH] libgcc: Exclude UCLIBC from GLIBC thread check

UBLIBC defines __GLIBC__ but also marks __pthread_key_create() as
protected. Leading to link errors with newer binutils such as:

  ld.bfd: isl_test_cpp17.o: non-canonical reference to canonical protected function `__pthread_key_create' in x86_64-multilib-linux-uclibc/sysroot/lib64/libc.so.1
  ld.bfd: failed to set dynamic section sizes: bad value

Add a condition on !__UCLIBC__ when selecting a symbol to detect pthread
usage so it picks the intended pthread_cancel().

Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
---
 libgcc/gthr-posix.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libgcc/gthr-posix.h b/libgcc/gthr-posix.h
index aebcfdd9f4ca..087a631d308d 100644
--- a/libgcc/gthr-posix.h
+++ b/libgcc/gthr-posix.h
@@ -233,7 +233,7 @@ __gthread_active_p (void)
    library does not provide pthread_cancel, so we do use pthread_create
    there (and interceptor libraries lose).  */
 
-#ifdef __GLIBC__
+#if defined(__GLIBC__) && !defined(__UCLIBC__)
 __gthrw2(__gthrw_(__pthread_key_create),
 	 __pthread_key_create,
 	 pthread_key_create)