Re: [Mjpeg-users] Errors with compile

[Steven M. S. <sm...@2B...>]

On Fri, 2 Jan 2004, JoeHill wrote:

> When I originally tried to compile mjpegtools from source, I was warned that
> without "nasm", performance would be very poor. So I installed the Mandrake nasm
> package, and proceeded to build. ./configure goes ok, but when I try to 'make' I
> get this error:
> 
> /home/joehill/tmp/ccdc9rev.s: Assembler messages:
> /home/joehill/tmp/ccdc9rev.s:625: Error: symbol `NOT_SUPPORTED' is already
> defined make: *** [jdapimin.o] Error 1

	Bug in gcc.   Change the "-O3" in the Makefile(s) to "-O2" and that
	should work around the problem.

> software installed, I am not sure what this error means (actually, this error
> comes up both when I try to build mjpegtools *and* when I try to build 
> jpeg-mmx).

	The problem has been seen in the past by other folks.   GCC ends up
	over optimizing a section of code and including the inline'd version
	and the actual function (something like that as I recall).

	The quickest way to fix the problem is change "-O3" to "-O2" 
	by manually editing the Makefiles.   

	Cheers,
	Steven Schultz