RE: [microblaze-uclinux] Gcc build bug?

[Scott Thibault <thibault@xxxxxxxxxx>]

Hi,

It was my fault, I had a call to xil_printf in my program.  I was
confused by the error message which indicated that the undefined
reference was in subdf3.c.  I guess I should have know because gcc never
has been good about reporting where undefined references are really
coming from.

During my investigation, I found that xil_printf was defined in
libc_hard_shift.a and of course calls outbyte.  It seems to me that
xil_printf should not be included in the uClinux libc if it does not
work.

--Scott

> -----Original Message-----
> From: owner-microblaze-uclinux@itee.uq.edu.au 
> [mailto:owner-microblaze-uclinux@itee.uq.edu.au] On Behalf Of 
> John Williams
> Sent: Tuesday, November 09, 2004 4:42 PM
> To: microblaze-uclinux@itee.uq.edu.au
> Subject: Re: [microblaze-uclinux] Gcc build bug?
> 
> 
> Hi Scott,
> 
> Scott Thibault wrote:
> > I get the following error building on windows using the EDK 
> microblaze 
> > tools, but linking with the libraries from the John's 
> toolchain build: 
> > 
> /home/sid/builds/EDK_Gm/env/Jobs/MDT/sw/lin/gnu1/newlib_bld/libgloss/m
> > ic
> > roblaze/floatlib/subdf3.c:70: undefined reference to `outbyte'
> > 
> > Is this a problem with the gcc libs, or am I somehow getting 
> > references the the EDK built libraries in my code?  John, does that 
> > path look like its from your build?
> 
> the outbyte() function is provided by one of xilinx custom 
> drivers/librarires, not the generic libgcc / newlib.  It is 
> referenced 
> when the function "print" is called.  Normally in a MSS file you 
> specifiy PARAMETER STDOUT= console_uart, or whatever, that causes the 
> driver code to be copied in an compiled, with the uartlite 
> providing the 
> outbyte() function.
> 
> When building a uClinux application, the "undefined symbol outbyte" 
> error is usually caused by a typo in the source code - using "print" 
> instead of "printf"
> 
> Hope this helps,
> 
> John
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