--- /dev/null
+From 15330adf7c2471fbaa6a0818db07078d81dbff97 Mon Sep 17 00:00:00 2001
+From: Bart Van Assche <bvanassche@acm.org>
+Date: Sat, 19 Sep 2020 08:08:59 -0700
+Subject: [PATCH] drd: Port to Fedora 33
+
+Apparently on Fedora 33 the POSIX thread functions exist in both libc and
+libpthread. Hence this patch that intercepts the pthread functions in
+libc. See also https://bugs.kde.org/show_bug.cgi?id=426144 .
+
+Signed-off-by: Bart Van Assche <bvanassche@acm.org>
+
+This patch was imported from the valgrind sourceware server
+(https://sourceware.org/git/?p=valgrind.git;a=commit;h=15330adf7c2471fbaa6a0818db07078d81dbff97)
+It was modified to remove the changes to the valgrind NEWS file,
+as these are difficult to maintain and don't impact the valgrind
+code itself.
+
+Upstream-Status: Backport
+
+Signed-off-by: Stacy Gaikovaia <stacy.gaikovaia@windriver.com>
+---
+ drd/drd_pthread_intercepts.c | 9 +++++++++
+ 1 file changed, 10 insertions(+)
+
+diff --git a/drd/drd_pthread_intercepts.c b/drd/drd_pthread_intercepts.c
+index 58c45aaec..c2882e5ab 100644
+--- a/drd/drd_pthread_intercepts.c
++++ b/drd/drd_pthread_intercepts.c
+@@ -174,7 +174,16 @@ static int never_true;
+ ret_ty VG_WRAP_FUNCTION_ZZ(VG_Z_LIBC_SONAME,zf) argl_decl \
+ { return implf argl; }
+ #else
++/*
++ * On Linux, intercept both the libc and the libpthread functions. At
++ * least glibc 2.32.9000 (Fedora 34) has an implementation of all pthread
++ * functions in both libc and libpthread. Older glibc versions only have an
++ * implementation of the pthread functions in libpthread.
++ */
+ #define PTH_FUNC(ret_ty, zf, implf, argl_decl, argl) \
++ ret_ty VG_WRAP_FUNCTION_ZZ(VG_Z_LIBC_SONAME,zf) argl_decl; \
++ ret_ty VG_WRAP_FUNCTION_ZZ(VG_Z_LIBC_SONAME,zf) argl_decl \
++ { return implf argl; } \
+ ret_ty VG_WRAP_FUNCTION_ZZ(VG_Z_LIBPTHREAD_SONAME,zf) argl_decl; \
+ ret_ty VG_WRAP_FUNCTION_ZZ(VG_Z_LIBPTHREAD_SONAME,zf) argl_decl \
+ { return implf argl; }
+--
+2.25.1
+
