how to trace the code of Xorg from the application

[Egbert Eich]

LongdaFeng at viatech.com.cn writes:
 > Hi everyone:
 > 
 >          First, any advice is appreciated!
 > 
 >  
 > 
 >          Recently, I run doom3-demo, it failed on the function
 > XextAddDisplay which is in libXext.so.6(it lie in the xc/lib/Xext), I
 > use gdb&ddd on two pc,
 > 
 >          I can add breakpoint in the function XextAddDisplay ,but the
 > ddd can't debug the function of XextAddDisplay
 > 

This seems to indicate that either you have not built this part of Xt 
with "-g" or something in your build process has stripped this info off.

 >  
 > 
 >          Addition: I run on Xorg6.9, the host.def is as attachment . I
 > build the Xorg with -g flag in the host.def
 > 
 > #define DefaultGcc2i386Opt   -O0 -g0 -march=pentium3 -pipe
                                    ^^^
Please take out the '0'. I'm not sure what level 0 actually means but
smaller numbers usually include less debugging information. 2 is the
default. I'd suggest you leave it there and just do '-g'.

Cheers,
	Egbert.