Thank you, Austin. Since I am not familiar with internal design of libc and libpthread, I am afraid of messing it up by reimplementing those pieces.
Looking forward to testing your patch. Jian On Apr 21, 2011, at 6:23 PM, "Austin Foxley" <aust...@cetoncorp.com> wrote: > On 03/27/2011 12:27 AM, Jian Peng wrote: >> This is one of many potential static linking problems in uClibc. Last time, >> I reported a bug on sigaction and submitted a patch, but similar multiple >> definition error could happen to any function that was defined as GLOBAL in >> both libc.a and libpthread.a while certain runtime supporting function from >> libc, like abort(), also call it. >> >> For example, sigprocmask-test.c is a simple testing program and >> >> $ gcc sigprocmask-test.c -o sigprocmask-test -static -lpthread >> >> Since sigprocmask is GLOBAL in both libc.a and libpthread.a, sigprocmask >> called in main function will pull in pt-sigprocmask.os from libpthread.a, >> but later, another sigprocmask called in abort (part of libc) will pull in >> sigprocmask.os from libc.a and leads to multiple definition error. >> >> To fix it, sigprocmask has to be defined as weak symbol. The same solution >> could be applied to other functions in libc/sysdeps/linux/common that will >> be called in both main and runtime supporting function in libc. I will >> identify them and post patch later. >> >> Here is my patch to fix sigprocmask, and it was tested on gcc-4.5.2 based >> toolchain on MIPS. > > > I've also ran into this problem recently but I fixed it by simply > removing the libpthread version entirely and forcing the calls to go > through libc. The calls I had trouble with were sigaction, sigprocmask, > and sigfillset. > > I think this is what Peter meant was his preferred solution in the reply > to your earlier email? > > Peter can you comment? I can put together a patch of what I've been > using and push it to future if that is what you meant. > > -Austin > _______________________________________________ uClibc mailing list uClibc@uclibc.org http://lists.busybox.net/mailman/listinfo/uclibc
