From: Jakub Jelinek <jakub@redhat.com>
To: libstdc++@gcc.gnu.org
Cc: gcc-patches@gcc.gnu.org
Subject: [PATCH] libstdc++: Workaround kernel-headers on s390x-linux
Date: Mon, 22 Apr 2024 17:37:27 +0200 [thread overview]
Message-ID: <ZiaEN0Vw5yPRXZYF@tucnak> (raw)
Hi!
We see
FAIL: 17_intro/headers/c++1998/all_attributes.cc (test for excess errors)
FAIL: 17_intro/headers/c++2011/all_attributes.cc (test for excess errors)
FAIL: 17_intro/headers/c++2014/all_attributes.cc (test for excess errors)
FAIL: 17_intro/headers/c++2017/all_attributes.cc (test for excess errors)
FAIL: 17_intro/headers/c++2020/all_attributes.cc (test for excess errors)
FAIL: 17_intro/names.cc -std=gnu++17 (test for excess errors)
on s390x-linux.
The first 5 are due to kernel-headers not using uglified attribute names,
where <asm/types.h> contains
__attribute__((packed, aligned(4)))
I've filed a downstream bugreport for this in
https://bugzilla.redhat.com/show_bug.cgi?id=2276084
(not really sure where to report kernel-headers issues upstream), while the
last one is due to <sys/ucontext.h> from glibc containing:
#ifdef __USE_MISC
# define __ctx(fld) fld
#else
# define __ctx(fld) __ ## fld
#endif
...
typedef union
{
double __ctx(d);
float __ctx(f);
} fpreg_t;
and g++ predefining -D_GNU_SOURCE which implies define __USE_MISC.
The following patch adds a workaround for this on the libstdc++ testsuite
side, ok for trunk?
2024-04-22 Jakub Jelinek <jakub@redhat.com>
* testsuite/17_intro/names.cc (d, f): Undefine on s390*-linux*.
* testsuite/17_intro/headers/c++1998/all_attributes.cc (packed): Don't
define on s390.
* testsuite/17_intro/headers/c++2011/all_attributes.cc (packed):
Likewise.
* testsuite/17_intro/headers/c++2014/all_attributes.cc (packed):
Likewise.
* testsuite/17_intro/headers/c++2017/all_attributes.cc (packed):
Likewise.
* testsuite/17_intro/headers/c++2020/all_attributes.cc (packed):
Likewise.
--- libstdc++-v3/testsuite/17_intro/names.cc.jj 2024-02-02 22:13:29.575359165 +0100
+++ libstdc++-v3/testsuite/17_intro/names.cc 2024-04-22 16:54:35.696710752 +0200
@@ -270,6 +270,12 @@
#undef u
#endif
+#if defined (__linux__) && defined (__s390__)
+// <sys/ucontext.h> defines fpreg_t::d and fpreg_t::f
+#undef d
+#undef f
+#endif
+
#if defined (__linux__) && defined (__sparc__)
#undef y
#endif
--- libstdc++-v3/testsuite/17_intro/headers/c++1998/all_attributes.cc.jj 2024-01-03 12:08:09.603789437 +0100
+++ libstdc++-v3/testsuite/17_intro/headers/c++1998/all_attributes.cc 2024-04-22 17:11:04.734990469 +0200
@@ -29,7 +29,11 @@
# define noreturn 1
# define visibility 1
#endif
+#ifndef __s390__
+// kernel-headers <asm/types.h> uses __attribute__((packed,aligned(4))) on
+// S390.
#define packed 1
+#endif
#define pure 1
// glibc's sysdeps/unix/sysv/linux/arm/sys/ucontext.h uses this on ARM.
#ifndef __arm__
--- libstdc++-v3/testsuite/17_intro/headers/c++2011/all_attributes.cc.jj 2024-04-22 17:11:20.028805205 +0200
+++ libstdc++-v3/testsuite/17_intro/headers/c++2011/all_attributes.cc 2024-04-22 17:12:01.531302456 +0200
@@ -29,7 +29,11 @@
# define visibility 1
#endif
#define no_unique_address 1
+#ifndef __s390__
+// kernel-headers <asm/types.h> uses __attribute__((packed,aligned(4))) on
+// S390.
#define packed 1
+#endif
#define pure 1
// glibc's sysdeps/unix/sysv/linux/arm/sys/ucontext.h uses this on ARM.
#ifndef __arm__
--- libstdc++-v3/testsuite/17_intro/headers/c++2014/all_attributes.cc.jj 2024-01-03 12:08:09.556790095 +0100
+++ libstdc++-v3/testsuite/17_intro/headers/c++2014/all_attributes.cc 2024-04-22 17:12:20.630071099 +0200
@@ -29,7 +29,11 @@
# define visibility 1
#endif
#define no_unique_address 1
+#ifndef __s390__
+// kernel-headers <asm/types.h> uses __attribute__((packed,aligned(4))) on
+// S390.
#define packed 1
+#endif
#define pure 1
// glibc's sysdeps/unix/sysv/linux/arm/sys/ucontext.h uses this on ARM.
#ifndef __arm__
--- libstdc++-v3/testsuite/17_intro/headers/c++2017/all_attributes.cc.jj 2024-01-03 12:08:09.506790795 +0100
+++ libstdc++-v3/testsuite/17_intro/headers/c++2017/all_attributes.cc 2024-04-22 17:12:38.751851577 +0200
@@ -28,7 +28,11 @@
# define visibility 1
#endif
#define no_unique_address 1
+#ifndef __s390__
+// kernel-headers <asm/types.h> uses __attribute__((packed,aligned(4))) on
+// S390.
#define packed 1
+#endif
#define pure 1
// glibc's sysdeps/unix/sysv/linux/arm/sys/ucontext.h uses this on ARM.
#ifndef __arm__
--- libstdc++-v3/testsuite/17_intro/headers/c++2020/all_attributes.cc.jj 2024-01-03 12:08:09.502790851 +0100
+++ libstdc++-v3/testsuite/17_intro/headers/c++2020/all_attributes.cc 2024-04-22 17:12:56.043642110 +0200
@@ -27,7 +27,11 @@
# define cold 1
# define visibility 1
#endif
+#ifndef __s390__
+// kernel-headers <asm/types.h> uses __attribute__((packed,aligned(4))) on
+// S390.
#define packed 1
+#endif
#define pure 1
// glibc's sysdeps/unix/sysv/linux/arm/sys/ucontext.h uses this on ARM.
#ifndef __arm__
Jakub
next reply other threads:[~2024-04-22 15:37 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-22 15:37 Jakub Jelinek [this message]
2024-04-22 15:41 ` Jonathan Wakely
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