Re: [avr-gcc-list] Linker search directories

[Bryce Denney]

On Mon, 28 Oct 2002, Joerg Wunsch wrote:
> > Does avr-ld have any built-in search paths for libraries?
> 
> Yes, it does.
> 
> > Is there a command to print them out?
> 
> Not that i know of.

GNU ld has a --verbose option that helps you to determine where it is
searching and what it is linking in.  If you are running ld directly, you
just add --verbose of course.  If gcc is running ld for you, which is more
common, then you can add "-Wl,--verbose" to ask gcc to pass the option to
the linker.

Example:
$ avr-gcc -mmcu=atmega163 -Os -I. -I../avrlib pwm1.c \
     -o pwm1.elf  -Wl,--verbose
GNU ld version 2.11 (with BFD 2.11)
  Supported emulations:
   avr85xx
   avr1200
   avr23xx
   avr44x4
   avr4433
   avrmega603
   avrmega103
   avrmega161
cannot find script file ldscripts/avrmega161.x
cannot find script file
  /usr/local/lib/gcc-lib/avr/3.0/avr5/ldscripts/avrmega161.x
cannot find script file
  /usr/local/lib/gcc-lib/avr/3.0/ldscripts/avrmega161.x
cannot find script file
 
/usr/local/lib/gcc-lib/avr/3.0/../../../../avr/lib/avr5/ldscripts/avrmega161.x
opened script file
/usr/local/lib/gcc-lib/avr/3.0/../../../../avr/lib/ldscripts/avrmega161.x
attempt to open
/usr/local/lib/gcc-lib/avr/3.0/../../../../avr/lib/avr5/crtm163.o
succeeded
/usr/local/lib/gcc-lib/avr/3.0/../../../../avr/lib/avr5/crtm163.o
attempt to open /tmp/ccmIFpVs.o succeeded
/tmp/ccmIFpVs.o
attempt to open /usr/local/lib/gcc-lib/avr/3.0/avr5/libgcc.a succeeded
attempt to open /usr/local/lib/gcc-lib/avr/3.0/avr5/libc.a failed
attempt to open /usr/local/lib/gcc-lib/avr/3.0/libc.a failed
attempt to open
/usr/local/lib/gcc-lib/avr/3.0/../../../../avr/lib/avr5/libc.a succeeded
attempt to open /usr/local/lib/gcc-lib/avr/3.0/avr5/libgcc.a succeeded

It's a little hard to interpret the output in the email here because of
line wraps.  But it looks like it actually used these files:
- /usr/local/avr/lib/ldscripts/avrmega161.x
- /usr/local/avr/lib/avr5/crtm163.o
- /tmp/ccmIFpVs.o   (must be the one it just compiled)
- /usr/local/lib/gcc-lib/avr/3.0/avr5/libgcc.a
- /usr/local/avr/lib/avr5/libc.a
- /usr/local/lib/gcc-lib/avr/3.0/avr5/libgcc.a

Good luck,
Bryce


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