mirror of
https://github.com/pmmp/musl-cross-make.git
synced 2024-11-18 04:37:40 +00:00
52 lines
1.6 KiB
Diff
52 lines
1.6 KiB
Diff
From 51a354a0fb54165d505bfed9819c0440027312d9 Mon Sep 17 00:00:00 2001
|
|
From: Szabolcs Nagy <nsz@port70.net>
|
|
Date: Sun, 22 Sep 2019 23:04:48 +0000
|
|
Subject: [PATCH] fix gthr weak refs for libgcc
|
|
|
|
ideally gthr-posix.h should be fixed not to use weak refs for
|
|
single thread detection by default since that's unsafe.
|
|
|
|
currently we have to opt out explicitly from the unsafe behaviour
|
|
in the configure machinery of each target lib that uses gthr and
|
|
musl missed libgcc previously.
|
|
|
|
related bugs and discussions
|
|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78017
|
|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87189
|
|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91737
|
|
https://sourceware.org/bugzilla/show_bug.cgi?id=5784
|
|
https://sourceware.org/ml/libc-alpha/2012-09/msg00192.html
|
|
https://sourceware.org/ml/libc-alpha/2019-08/msg00438.html
|
|
---
|
|
libgcc/config.host | 7 +++++++
|
|
libgcc/config/t-gthr-noweak | 2 ++
|
|
2 files changed, 9 insertions(+)
|
|
create mode 100644 libgcc/config/t-gthr-noweak
|
|
|
|
diff --git a/libgcc/config.host b/libgcc/config.host
|
|
index 122113fc519..fe1b9ab93d5 100644
|
|
--- a/libgcc/config.host
|
|
+++ b/libgcc/config.host
|
|
@@ -1500,3 +1500,10 @@ aarch64*-*-*)
|
|
tm_file="${tm_file} aarch64/value-unwind.h"
|
|
;;
|
|
esac
|
|
+
|
|
+case ${host} in
|
|
+*-*-musl*)
|
|
+ # The gthr weak references are unsafe with static linking
|
|
+ tmake_file="$tmake_file t-gthr-noweak"
|
|
+ ;;
|
|
+esac
|
|
diff --git a/libgcc/config/t-gthr-noweak b/libgcc/config/t-gthr-noweak
|
|
new file mode 100644
|
|
index 00000000000..45a21e9361d
|
|
--- /dev/null
|
|
+++ b/libgcc/config/t-gthr-noweak
|
|
@@ -0,0 +1,2 @@
|
|
+# Don't use weak references for single-thread detection
|
|
+HOST_LIBGCC2_CFLAGS += -DGTHREAD_USE_WEAK=0
|
|
--
|
|
2.17.1
|
|
|