public inbox for glibc-cvs@sourceware.org
help / color / mirror / Atom feed
From: Fangrui Song <maskray@sourceware.org>
To: glibc-cvs@sourceware.org
Subject: [glibc/maskray/clang] x86_64: Improve configure to catch incomplete Clang support
Date: Sun, 10 Oct 2021 23:12:50 +0000 (GMT) [thread overview]
Message-ID: <20211010231250.453C83858024@sourceware.org> (raw)
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=65c85a0cf8f7e990a7133a703b7631d2d98dd20f
commit 65c85a0cf8f7e990a7133a703b7631d2d98dd20f
Author: Fangrui Song <maskray@google.com>
Date: Sat Sep 25 23:36:15 2021 -0700
x86_64: Improve configure to catch incomplete Clang support
Diff:
---
sysdeps/x86_64/configure | 2 ++
sysdeps/x86_64/configure.ac | 2 ++
2 files changed, 4 insertions(+)
diff --git a/sysdeps/x86_64/configure b/sysdeps/x86_64/configure
index 585279f83d..c3145e6030 100755
--- a/sysdeps/x86_64/configure
+++ b/sysdeps/x86_64/configure
@@ -30,6 +30,8 @@ if ${libc_cv_asm_mpx+:} false; then :
else
cat > conftest.s <<\EOF
bndmov %bnd0,(%rsp)
+ bnd
+ jmp *%r11
EOF
if { ac_try='${CC-cc} -c $ASFLAGS conftest.s 1>&5'
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
diff --git a/sysdeps/x86_64/configure.ac b/sysdeps/x86_64/configure.ac
index 29e14033c0..3c935d66e1 100644
--- a/sysdeps/x86_64/configure.ac
+++ b/sysdeps/x86_64/configure.ac
@@ -14,6 +14,8 @@ dnl Check whether asm supports Intel MPX
AC_CACHE_CHECK(for Intel MPX support, libc_cv_asm_mpx, [dnl
cat > conftest.s <<\EOF
bndmov %bnd0,(%rsp)
+ bnd
+ jmp *%r11
EOF
if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
libc_cv_asm_mpx=yes
next reply other threads:[~2021-10-10 23:12 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-10 23:12 Fangrui Song [this message]
-- strict thread matches above, loose matches on Subject: below --
2021-10-08 1:44 Fangrui Song
2021-10-07 20:14 Fangrui Song
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20211010231250.453C83858024@sourceware.org \
--to=maskray@sourceware.org \
--cc=glibc-cvs@sourceware.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).