[uclibc-ng-devel] static uClibc error

Hi Waldemar, all. Commit that introduced a single libc and deduplicated threading code, i.e.: http://cgit.uclibc-ng.org/cgi/cgit/uclibc-ng.git/commit/?id=29ff9055c80efe7… has affected statically built uClibc. After that commit if someone tries to link any application with libc.a, he gets the message like this: ---------------------------------->8------------------------------------ ..../libgcc.a(unwind-dw2-fde-dip.o): In function `_Unwind_Find_FDE': ..../libgcc/unwind-dw2-fde-dip.c:465: undefined reference to `dl_iterate_phdr' ..../bin/ld: GOT and PLT relocations cannot be fixed with a non dynamic linker. ..../bin/ld: final link failed: Bad value collect2: error: ld returned 1 exit status ---------------------------------->8------------------------------------ Seems like there are complicated cyclic dependencies between libgcc.a and libc.a as when we pass libc to linker twice, e.g in the following order: ---------------------------------->8------------------------------------ -lc -lgcc -lc -lgcc ---------------------------------->8------------------------------------ linking is processed without any errors. To reproduce the issue try to build a simple hello world program like: ---------------------------------->8------------------------------------ #include <stdio.h> int main() {     printf("hello world\n");     return 0; } ---------------------------------->8------------------------------------ and link with the latest statically built uClibc (libc.a) for ARC for example and you will get the error, described above.  Also you can find these errors in buildroot autobuilder's logs for different architectures: xtensa: http://autobuild.buildroot.net/results/566/56636ab66a68045c43419feb7d5f356a… arc:    http://autobuild.buildroot.net/results/025/02593e7f2eac19b77bcaad3b0e9e8f94… Thanks. --  Best regards, Vlad Zakharov &lt;vzakhar(a)synopsys.com&gt;