Versioned glibc symbols

[Robert Schwebel <robert at schwebel dot de>]

This may be a FAQ but I didn' fid some sane documentation yet: I have
the problem that building applications crashes in the linker stage when
the libc built into the cross compiler is another version than the libc
built for the system I'm working on. For example, busybox crashes here: 

[...]
i386-linux-gcc -L/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib --dynamic-linker=/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/ld-linux.so -o busybox -Wl,--start-group ./applets/applets.a ./archival/archival.a ./archival/libunarchive/libunarchive.a ./coreutils/coreutils.a ./console-tools/console-tools.a ./debianutils/debianutils.a ./editors/editors.a ./findutils/findutils.a ./init/init.a ./miscutils/miscutils.a ./modutils/modutils.a ./networking/networking.a ./networking/libiproute/libiproute.a ./networking/udhcp/udhcp.a ./procps/procps.a ./loginutils/loginutils.a ./shell/shell.a ./sysklogd/sysklogd.a ./util-linux/util-linux.a ./libpwdgrp/libpwdgrp.a ./coreutils/libcoreutils/libcoreutils.a ./libbb/libbb.a -lcrypt -Wl,--end-group
/usr/lib/gcc-lib/i486-linux/3.3.4/../../../crt1.o(.text+0xc): In function `_start':
../sysdeps/i386/elf/start.S:92: undefined reference to `__libc_csu_fini'
/usr/lib/gcc-lib/i486-linux/3.3.4/../../../crt1.o(.text+0x11):../sysdeps/i386/elf/start.S:93: undefined reference to `__libc_csu_init'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_lazy@GLIBC_2.1.1'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_dst_substitute@GLIBC_2.1.1'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_out_of_memory@GLIBC_2.2'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_relocate_object@GLIBC_2.0'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_clktck@GLIBC_2.2'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `__libc_enable_secure@GLIBC_2.0'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_catch_error@GLIBC_2.0'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_platformlen@GLIBC_2.1.1'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_lookup_versioned_symbol_skip@GLIBC_2.0'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_lookup_versioned_symbol@GLIBC_2.0'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_dst_count@GLIBC_2.1.1'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_initial_searchlist@GLIBC_2.1'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_start_profile@GLIBC_2.1'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_lookup_symbol@GLIBC_2.0'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `__libc_stack_end@GLIBC_2.1'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_argv@GLIBC_2.2'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_loaded@GLIBC_2.1'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_origin_path@GLIBC_2.1.1'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_check_map_versions@GLIBC_2.2'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_map_object@GLIBC_2.0'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_main_searchlist@GLIBC_2.1'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_debug_mask@GLIBC_2.2.3'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_load_lock@GLIBC_2.2'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_profile@GLIBC_2.1'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_debug_state@GLIBC_2.0'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_init_all_dirs@GLIBC_2.2'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_unload_cache@GLIBC_2.1'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_signal_error@GLIBC_2.0'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_debug_printf@GLIBC_2.2.3'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_init@GLIBC_2.2'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_all_dirs@GLIBC_2.2'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_map_object_deps@GLIBC_2.0'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_nloaded@GLIBC_2.2'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_profile_map@GLIBC_2.1'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_profile_output@GLIBC_2.1'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_pagesize@GLIBC_2.2'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_lookup_symbol_skip@GLIBC_2.0'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_fpu_control@GLIBC_2.1'
/ptx/work/svn-rsc/ptxdist-0.7-trunk/local/i386-linux/lib/libc.so.6: undefined reference to `_dl_global_scope_alloc@GLIBC_2.1'
collect2: ld returned 1 exit status
make[1]: *** [busybox] Error 1
make[1]: Leaving directory `/ptx/work/svn-rsc/ptxdist-0.7-trunk/build/busybox-1.00-rc2'

Now the question is: how is this intended? Is it possible at all to build a
system with another glibc than built into the compiler? Or should that
always be compatible? 

Robert 
-- 
 Dipl.-Ing. Robert Schwebel | http://www.pengutronix.de
 Pengutronix - Linux Solutions for Science and Industry
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