I have post all errors happened before linker error on June 4th...it was related to sdt.h, and I fixed that, after that i removed the build dir and build it again, getting same linker error. in your last post you were asking about stapsdt.base string.... please see [root@fedora32 sys]# grep -rn stapsdt.base * sdt.h:154: _SDT_ASM_1( _SDT_ASM_ADDR _.stapsdt.base) \ sdt.h:163: _SDT_ASM_1(.ifndef _.stapsdt.base) \ sdt.h:164: _SDT_ASM_5( .pushsection .stapsdt.base,"aG","progbits", \ sdt.h:165: .stapsdt.base,comdat) \ sdt.h:166: _SDT_ASM_1( .weak _.stapsdt.base) \ sdt.h:167: _SDT_ASM_1( .hidden _.stapsdt.base) \ sdt.h:168: _SDT_ASM_1( _.stapsdt.base: .space 1) \ sdt.h:169: _SDT_ASM_2( .size _.stapsdt.base, 1) \ Feel free for any information. On Fri, Jun 7, 2013 at 1:54 PM, Jonathan Wakely <jwakely.gcc@xxxxxxxxx> wrote: > On 7 June 2013 07:14, rahul wrote: >> looks like, no one is interested in giving clue about the problem. > > Or maybe noone knows what the problem is because you didn't provide > the information requested three days ago. Do any other errors occur > before the linker errors? Have you tried a completely clean build > after your changes to the sdt.h header?