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I try compiling some large code with the -g option but when I try running the code with gdb it says the emitted code contains no debugging symbols.
Reading symbols from /cygdrive/c/dev/dotr/src/dotr.exe...(no debugging symbols found)...
done.
This is cygwin on windows but I figured linux group would still be better :)
Anybody know what I could do to get debugging symbols emitted?
1. Did you invoke the linker without the -g option?
2. There are several flavours of -g symbols, maybe you got the wrong one for your debugger.
Is this a new issue, or have you managed to use debug symbols before on other code?
Never used gdb before.
it works on a little 1 file test project though
You have to compile with the cygwin version of gcc to use the cygwin version of gdb, I think (my version of cygwin is really old). If you compile your program with, say, Dev-C++, then debug it with the MinGW debugger that comes with Dev-C++.
Also make sure you're not using "strip" on the executable.
For GCC, -s strips the executable. Even if it's followed by -g it strips the executable.
You can use file (which my cygwin doesn't have) to see if the executable is stripped:
Code:$ file exe.exe
exe.exe: Win32 executable, stripped
$
AHA! it was stripped somewhere deep in the makefile caverns :)
now the next problem ^^
Just another question out of interest
The makefiles contained -gdwarf-2 as debug format but gdb couldnt handle that apparently.
What format is used when just -g is specified? Or is it possible to let handle gdb dwarf2?
I got the error invalid dwarf-2 offset when i wanted to set a break. only after removing the special -g option it worked
It's a kind of generic debugging format. It's not as useful to specific debuggers as the special flag for that debugger, but it works debugger-wide. :)Quote:
What format is used when just -g is specified?
[edit] I think GDB supports the older dwarf format (from http://www.fsf.org/resources/service):
[/edit]Quote:
Designed and developed all code to support the generation
of Dwarf symbolic debugging information for System V Release
4 in GCC2.