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List: linux-gcc
Subject: Assembler errors in optimization level 3 (-O3) - gcc (4.1.2)
From: "Srinivas G." <srinivasg () esntechnologies ! co ! in>
Date: 2009-02-25 13:31:03
Message-ID: F5BA82141F7AA94885B9643C77EEA5F210463D () mail ! esntechnologies ! co ! in
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Dear All,
I have written an application where I used a few ASM statements in it.
The statements are very simple and they look like as shown below.
asm
(
"next:\n\t"
#ifdef __x86_64__
"pop %rax\n\t"
"pop %rcx"
#else
"popl %eax\n\t"
"popl %ecx"
#endif
);
asm
(
"xorl %eax, %eax\n\t"
"cpuid\n\t"
"cmpl $4, %eax\n\t" // check if cpuid supports leaf 4
"jl .single_core\n\t" // Single core
"movl $4, %eax\n\t"
"movl $0, %ecx\n\t" // start with index = 0; Leaf 4 reports
); // at least one valid cache
level
asm
(
"cpuid"
: "=a" (Regeax)
:
: "%ebx", "%ecx", "%edx"
);
asm
(
"jmp .multi_core\n"
".single_core:\n\t"
"xor %eax, %eax\n"
".multi_core:"
);
I am able to compile the application in optimization level 2 (-O2) where
as when I specify the optimization level (-O3) I end up with the
following errors.
{standard input}: Assembler messages:
{standard input}:275: Error: symbol `next' is already defined
{standard input}:532: Error: symbol `.single_core' is already defined
{standard input}:534: Error: symbol `.multi_core' is already defined
{standard input}:579: Error: symbol `next' is already defined
{standard input}:590: Error: symbol `next' is already defined
{standard input}:614: Error: symbol `next' is already defined
{standard input}:637: Error: symbol `next' is already defined
{standard input}:690: Error: symbol `.single_core' is already defined
{standard input}:692: Error: symbol `.multi_core' is already defined
{standard input}:1007: Error: symbol `.single_core' is already defined
{standard input}:1009: Error: symbol `.multi_core' is already defined
{standard input}:1045: Error: symbol `.single_core' is already defined
{standard input}:1047: Error: symbol `.multi_core' is already defined
{standard input}:1083: Error: symbol `.single_core' is already defined
{standard input}:1085: Error: symbol `.multi_core' is already defined
{standard input}:1196: Error: symbol `.single_core' is already defined
{standard input}:1198: Error: symbol `.multi_core' is already defined
I have searched the google and did not find any solution. However, I
have gone through the following link and there is no much luck to me.
http://lists.atrpms.net/pipermail/atrpms-users/2005-July/003451.html
One thing, I can mention here is, I did update the packages through YUM
command only. The system configuration is as follows.
1) DELL 64 Bit - Pentium(R) D CPU 3.00 GHz
2) 1 GB RAM
3) Linux - CENTOS - 5.2 with default kernel version - 2.6.18-92.el5
4) gcc version 4.1.2 20071124
Please suggest me a solution to getridof from the above errors.
Thanks in advance.
Thanks and Regards,
Srinivas G
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