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From: "Srinivas G." <srinivasg@esntechnologies.co.in>
To: linux-gcc@vger.kernel.org, linux-c-programming@vger.kernel.org,
	linux-apps@vger.kernel.org
Cc: pradeep.rautela@gmail.com,
	Glynn Clements <glynn@gclements.plus.com>,
	Richard Dengler <rdengler@arcor.de>,
	uday.karan@gmail.com, brouits@free.fr
Subject: Assembler errors in optimization level 3 (-O3)  -  gcc (4.1.2)
Date: Wed, 25 Feb 2009 18:44:25 +0530	[thread overview]
Message-ID: <F5BA82141F7AA94885B9643C77EEA5F210463C@mail.esntechnologies.co.in> (raw)

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

next             reply	other threads:[~2009-02-25 13:14 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-02-25 13:14 Srinivas G. [this message]
2009-02-25 13:19 ` Assembler errors in optimization level 3 (-O3) - gcc (4.1.2) Srinivas G.
2009-03-03 14:33 ` Srinivas G.

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