I built glibc-2.8 for an arm-none-linux host using a gcc-4.3
cross-compiler on a i386-apple-darwin9 host. When I try to build
executables, the following two symbols are unresolved:
/Volumes/cross/usr/lib/gcc/arm-none-linux/4.3.3/../../../../arm-none-linux/lib/crt1.o:
In function `_start':
init.c:(.text+0x2c): undefined reference to `__libc_csu_fini'
init.c:(.text+0x34): undefined reference to `__libc_csu_init'
I traced this down to the following. The actual references to these
symbols occur in
glibc-ports-2.8/sysdeps/arm/elf/start.S
which just loads their addresses into some registers in preparation for
calling __libc_start_main.
The symbols are defined in
glibc-2.8/csu/elf-init.c
but this file is not included in the shared library /lib/libc-2.8.so
because of line 33 of glibc-2.8/csu/Makefile which contains
static-only-routines = elf-init
IOW, the definitions of __libc_csu_fini and __libc_csu_init are only
included in /usr/lib/libc.a
$ arm-none-linux-nm -g libc.a | egrep __libc_csu_
00000000 T __libc_csu_fini
00000040 T __libc_csu_init
but not in /lib/libc-2.8.so
$ arm-none-linux-nm -g libc-2.8.so | grep __libc_csu_
$
So it seems to me there is a problem with including
glibc-ports-2.8/sysdeps/arm/elf/start.S
in both the shared and static libraries but including
glibc-2.8/csu/elf-init.c
in only the static library. What is the correct thing to do in this
situation?
--
Charles M. Coldwell, W1CMC
"Turn on, log in, tune out"
Winchester, Massachusetts, New England (FN42kk)
GPG ID: 852E052F
GPG FPR: 77E5 2B51 4907 F08A 7E92 DE80 AFA9 9A8F 852E 052F