[sane-devel] Can you help me

[YiHao at rst.ricoh.com]

Hello allan,

I can get debug log with scanimage, Thanks a lot !
But, I can not get the debug log of the backends correctly with the
graphical frontend(xscanimage or xsane).
-----------------------------------------
1>CFLAGS="-g  -o" ./configure BACKENDS="ricoh"
2>make
3>make install
4>SANE_DEBUG_RICOH=255  xsane    --->XSANE has been started, but I can get
the debug logging of the backends
-----------------------------------------
I'm not sure,
Whether the problem is because the installation path can not be the default
</usr/local/lib/sane/>.

What should I do  if I want to get the debug log of the backends using the
graphical frontend,
Look forward to your help, Thank you~

Best Regard
Yours Sincerely, Yihao





                                                                           
             "m. allan noah"                                               
             <kitno455 at gmail.c                                             
             om>                                                        To 
                                       YiHao at rst.ricoh.com                 
             08/23/2013 07:29                                           cc 
             PM                        sane-devel                          
                                       <sane-devel at lists.alioth.debian.org 
                                       >, yihao1008 at 163.com                
                                                                   Subject 
                                       Re: [sane-devel] Can you help me    
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           





1. I don't think you want to use --disable-shared.  You should build and
install shared libraries someplace that your system's linker will find
them.

2. You get debug logging by using environment variables with any sane
frontend, like so:

SANE_DEBUG_RICOH=255 scanimage -L

3. You do not see any scanners listed by scanimage -L because the
sane-backend only supports a few older ricoh scanners. I doubt your scanner
is supported. Three different backends provide this support.

See a list here: http://www.sane-project.org/sane-mfgs.html#Z-RICOH

allan



On Fri, Aug 23, 2013 at 6:24 AM,  <YiHao at rst.ricoh.com>wrote:
Dear Sir or Madam:
I was so pleased to received your reply,

I have some questions about using the debugging library，Can you give me
some advice?
①
If I want to debug the sane-backends(e.g. ricoh.c),
Please give me some advice for the following steps(Is there anything
wrong?).
-----------------------------------------
1>CFLAGS="-g" ./configure --disable-shared BACKENDS="ricoh"
2>make
3>make install
4>... ...（How Can I make this step?）
-----------------------------------------
②
I'm not sure, If I can get the debug information through the following
steps.
-----------------------------------------
1>CFLAGS="-g" ./configure --disable-shared
2>make
3>make install

 "scanimage -L"  --Faild to get the debug information.
-----------------------------------------
③
I can't get any sane-backends information by "scanimage -L",
Whether I must have a scanner device connected to My computer through USB
or SCSI ?

Thank you very much, Looking forward to your reply.
Best Regard
Yours Sincerely,  Yihao











We have a debugging library which is part of sane-backends. It allows you
to set an environment variable, and which causes the backend to print
messages to STDERR. If your backend is part of sane-backends, you can use
this library. If you backend is outside of sane-backends, you can certainly
setup something similar in your backend. You should not have to recompile
the frontend.

allan


On Thu, Aug 22, 2013 at 6:46 AM,  <YiHao at rst.ricoh.com>wrote:

Dear Sir or Madam:

I want to know,
How can I debug the sane-backend by frontend(e.g. scanimage),

How to enter the backend's breakpoint,
Do I need to compile the frontend if I want to know  whether the backend
receives the Frontend command.





Can you give me some advise, Thank you.
Best Regard

Yours Sincerely, Yihao


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