Dear All , Was enabled the switch "-fleading-underscore" to emit the global symbol name with prefix _ .
The respective C source file int a=10; int b=10,c; int test() { c =a+b ; tes(); return c ; } and respective asm file .global _a .section .data .align 1 .type _a, %object .size _a, 2 _a: .word 10 .global _b .align 1 .type _b, %object .size _b, 2 _b: .word 10 .comm _c, 2,2 .section .text .align 1 .global _test .type _test, %function _test: ld HL, (a) ld DE, (b) add DE, HL ld (c), DE cal _tes ld DE, (c) ld WA, DE ret if you see the asm ,the global symbol names was prefixed with _ in the definition ,But not in the uses. I'm sure we are missing something here w.r.t -fleading-underscore flag and gcc source is 4.8.1. Any help will be appreciated here . Thank you ~Umesh