Attachment 13394 Details for Bug 46405 – таки исправление проблемы

[patch] таки исправление проблемы

0001-Fixed-i386-misdetection-on-non-x86-architectures.patch (text/plain), 2.70 KB, created by Alexey Sheplyakov on 2023-06-06 17:41:46 MSK

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Creator: Alexey Sheplyakov

Created: 2023-06-06 17:41:46 MSK

Size: 2.70 KB

patch

obsolete

>From 85e4d6427a6bece9fbae1a691a21a04a7b0163f2 Mon Sep 17 00:00:00 2001
>From: Alexey Sheplyakov <asheplyakov@basealt.ru>
>Date: Tue, 6 Jun 2023 13:29:54 +0000
>Subject: [PATCH] Fixed i386 misdetection on non-x86 architectures
>
>libtool: compile:  loongarch64-alt-linux-gcc -DHAVE_CONFIG_H -I. -I.. -pipe -frecord-gcc-switches -Wall -g -O2 -flto=auto -c trace.c  -fPIC -DPIC -o .libs/trace.o
>make[2]: Leaving directory '/usr/src/RPM/BUILD/potrace-1.16/src'
>make[2]: Entering directory '/usr/src/RPM/BUILD/potrace-1.16/src'
>/bin/sh ../libtool  --tag=CC   --mode=link loongarch64-alt-linux-gcc  -pipe -frecord-gcc-switches -Wall -g -O2 -flto=auto   -o mkbitmap mkbitmap.o bitmap_io.o greymap.o -lm
>libtool: link: loongarch64-alt-linux-gcc -pipe -frecord-gcc-switches -Wall -g -O2 -flto=auto -o mkbitmap mkbitmap.o bitmap_io.o greymap.o  -lm
>{standard input}: Assembler messages:
>{standard input}:3817: Error: no match insn: bsf        $r12,$r14
>{standard input}:3818: Error: no match insn: jnz        0f
>{standard input}:3819: Error: no match insn: movl       $32,$r14
>{standard input}:3839: Error: no match insn: bsf        $r12,$r13
>{standard input}:3840: Error: no match insn: jnz        0f
>{standard input}:3841: Error: no match insn: movl       $32,$r13
>{standard input}:3852: Error: no match insn: bsf        $r12,$r12
>{standard input}:3853: Error: no match insn: jnz        0f
>{standard input}:3854: Error: no match insn: movl       $32,$r12
>make[3]: *** [/usr/src/tmp/cckhtRVf.mk:2: /usr/src/tmp/ccI17jqP.ltrans0.ltrans.o] Error 1
>lto-wrapper: fatal error: make returned 2 exit status
>compilation terminated.
>ld: error: lto-wrapper failed
>collect2: error: ld returned 1 exit status
>
>To solve the problem avoid the UB in the test program which checks
>if x86 asm can be used.
>
>Closes: #46405
>---
> potrace/configure.ac | 7 ++++---
> 1 file changed, 4 insertions(+), 3 deletions(-)
>
>diff --git a/potrace/configure.ac b/potrace/configure.ac
>index 26cfc91..e0de0d9 100644
>--- a/potrace/configure.ac
>+++ b/potrace/configure.ac
>@@ -251,9 +251,10 @@ AC_CHECK_FUNC(strncasecmp, ,
> dnl ----------------------------------------------------------------------
> dnl Check whether we have i386 features
> AC_MSG_CHECKING([for Intel 386])
>-AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[int x;
>-  asm("bsf %1,%0\njnz 0f\nmovl $32,%0\n0:":"=r"(x):"r"(x));
>-  return x; /* need this so that -O2 does not optimize the asm away */
>+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[int x=1;
>+  volatile asm("bsf %1,%0\njnz 0f\nmovl $32,%0\n0:":"=r"(x):"r"(x):"memory");
>+ /* volatile and "memory" clobber ensures '-O2 -flto' does not optimize the asm away */
>+  return x;
> ]])],[AC_MSG_RESULT(yes) 
>  AC_DEFINE(HAVE_I386,, Can we use Intel 386 optimizations?)
> ],[AC_MSG_RESULT(no)])	
>-- 
>2.33.3
>

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