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From: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19346 Description: [reply] Last confirmed: 2005-01-09 15:50 Opened: 2005-01-09 10:11 With current GCC CVS I get lots of warnings when compiling glibc about aliases to undefined symbols: aj@gromit:~/tmp> /opt/gcc/4.0-devel/bin/gcc -O2 -c test.i test.i:2: warning: ?__libc_errno? aliased to undefined symbol ?errno? aj@gromit:~/tmp> nm test.o 0000000000000004 C errno One testcase is: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ int errno; extern int __libc_errno __attribute__ ((alias ("errno"))); ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ------- Additional Comment #1 From Andrew Pinski 2005-01-09 15:50 [reply] ------- Confirmed. ------- Additional Comment #2 From Richard Henderson 2005-01-09 18:46 [reply] ------- I hadn't realized aliases to COMMON symbols ever worked... ------- Additional Comment #3 From Richard Henderson 2005-01-09 18:49 [reply] ------- Indeed, they DO NOT work, and never have. The warning is correct. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ So, what shall we do with glibc? Btw. I get this warning also for: wcsftime_l.c:26: warning: âwcsftime_lâ aliased to undefined symbol â__wcsftime_lâ ../nss/getXXent_r.c:203: warning: âgetgrent_râ aliased to undefined symbol â__new_getgrent_râ ../sysdeps/posix/pathconf.c:237: warning: âpathconfâ aliased to undefined symbolâ__pathconfâ ../sysdeps/posix/fpathconf.c:241: warning: âfpathconfâ aliased to undefined symbol â__fpathconfâ Richard, do these also point to a problem in glibc? Andreas -- Andreas Jaeger, aj@suse.de, http://www.suse.de/~aj SUSE Linux Products GmbH, Maxfeldstr. 5, 90409 NÃrnberg, Germany GPG fingerprint = 93A3 365E CE47 B889 DF7F FED1 389A 563C C272 A126
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