Re: linking correct libc

[ng at piments dot com]

Hi,

trying --sysroot was one of my desperate attempts to get some sense out 
of this toolchain. I have now dumped the idea.


 CFLAGS="-march=armv4t" CPPFLAGS="-I/back/ts/root2/usr/include" 
LDFLAGS="-L/back/ts/root2/usr/lib/ 
-L/back/ts/ct-wkg/x-tools/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi/sys-root/lib" 
make


...
/back/ts/ct-ng/x-tools/arm-unknown-linux-gnueabi/lib/gcc/arm-unknown-linux-gnueabi/4.3.2/../../../../arm-unknown-linux-gnueabi/bin/ld: 
skipping incompatible /lib/libc.so.6 when searching for /lib/libc.so.6
/back/ts/ct-ng/x-tools/arm-unknown-linux-gnueabi/lib/gcc/arm-unknown-linux-gnueabi/4.3.2/../../../../arm-unknown-linux-gnueabi/bin/ld: 
cannot find /lib/libc.so.6
collect2: ld returned 1 exit status
make: *** [pmap_dump] Error 1
pr


adding -nostdlib stops it finding the host libc but stops it finding any 
libc:


 CFLAGS="-march=armv4t" CPPFLAGS="-I/back/ts/root2/usr/include" 
LDFLAGS="-L/back/ts/root2/usr/lib/ 
-L/back/ts/ct-wkg/x-tools/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi/sys-root/lib 
-nostdlib" make

...

/back/ts/ct-ng/x-tools/arm-unknown-linux-gnueabi/lib/gcc/arm-unknown-linux-gnueabi/4.3.2/../../../../arm-unknown-linux-gnueabi/bin/ld: 
warning: cannot find entry symbol _start; defaulting to 000080b4
pmap_dump.o: In function `main':
pmap_dump.c:(.text+0x28): undefined reference to `memset'
pmap_dump.c:(.text+0x3c): undefined reference to `htonl'
pmap_dump.c:(.text+0x4c): undefined reference to `htons'
pmap_dump.c:(.text+0x60): undefined reference to `pmap_getmaps'
pmap_dump.c:(.text+0x7c): undefined reference to `getrpcbynumber'
pmap_dump.c:(.text+0x104): undefined reference to `printf'
pmap_dump.c:(.text+0x12c): undefined reference to `fclose'
pmap_dump.c:(.text+0x148): undefined reference to `perror'
pmap_dump.c:(.text+0x17c): undefined reference to `stdout'
pmap_dump.o: In function `protoname':
pmap_dump.c:(.text+0x1d8): undefined reference to `sprintf'
collect2: ld returned 1 exit status
make: *** [pmap_dump] Error 1


 file pmap_dump.o
pmap_dump.o: ELF 32-bit LSB relocatable, ARM, version 1 (SYSV), not stripped


 file 
/back/ts/ct-wkg//x-tools/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi/sys-root/lib/libc.so.6 

/back/ts/ct-wkg//x-tools/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi/sys-root/lib/libc.so.6: 
symbolic link to `libc-2.9.so'

file 
/back/ts/ct-wkg//x-tools/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi/sys-root/lib/libc-2.9.so
/back/ts/ct-wkg//x-tools/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi/sys-root/lib/libc-2.9.so: 
ELF 32-bit LSB shared object, ARM, version 1 (SYSV), dynamically linked 
(uses shared libs), for GNU/Linux 2.6.29, not stripped


So the two basic issues remain: why does it find /lib/libc.so.6 at all 
and why can't it find (or use) the library that exists in the libdir 
explicitly included with -L ??


This one issue has consumed a lot of time , any help would be appreciated.

regards, Peter.

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