System: GCC6.3.0, binutil-2.27, newlib-2.4.0 Using Flag "--coverage" does not generate any gdca files. What is suspicious is that the libgcov.a looks empty, concretly, libgcov.a looks as: _gcov_merge_add.o: file format elf32-i386 Disassembly of section .text: 00000000 <__gcov_merge_add>: 0: 55 push %ebp 1: 89 e5 mov %esp,%ebp 3: 5d pop %ebp 4: c3 ret _gcov_merge_single.o: file format elf32-i386 Disassembly of section .text: 00000000 <__gcov_merge_single>: 0: 55 push %ebp 1: 89 e5 mov %esp,%ebp 3: 5d pop %ebp 4: c3 ret _gcov_merge_delta.o: file format elf32-i386 Disassembly of section .text: 00000000 <__gcov_merge_delta>: 0: 55 push %ebp 1: 89 e5 mov %esp,%ebp 3: 5d pop %ebp 4: c3 ret _gcov_merge_ior.o: file format elf32-i386 _gcov_merge_time_profile.o: file format elf32-i386 _gcov_merge_icall_topn.o: file format elf32-i386 _gcov_interval_profiler.o: file format elf32-i386 _gcov_pow2_profiler.o: file format elf32-i386 _gcov_one_value_profiler.o: file format elf32-i386 _gcov_indirect_call_profiler.o: file format elf32-i386 _gcov_average_profiler.o: file format elf32-i386 _gcov_ior_profiler.o: file format elf32-i386 _gcov_indirect_call_profiler_v2.o: file format elf32-i386 _gcov_time_profiler.o: file format elf32-i386 _gcov_indirect_call_topn_profiler.o: file format elf32-i386 _gcov_dump.o: file format elf32-i386 Disassembly of section .text: 00000000 <__gcov_dump>: 0: 55 push %ebp 1: 89 e5 mov %esp,%ebp 3: 5d pop %ebp 4: c3 ret _gcov_flush.o: file format elf32-i386 Disassembly of section .text: 00000000 <__gcov_flush>: 0: 55 push %ebp 1: 89 e5 mov %esp,%ebp 3: 5d pop %ebp 4: c3 ret _gcov_fork.o: file format elf32-i386 _gcov_execl.o: file format elf32-i386 _gcov_execlp.o: file format elf32-i386 _gcov_execle.o: file format elf32-i386 _gcov_execv.o: file format elf32-i386 _gcov_execvp.o: file format elf32-i386 _gcov_execve.o: file format elf32-i386 _gcov_reset.o: file format elf32-i386 Disassembly of section .text: 00000000 <__gcov_reset>: 0: 55 push %ebp 1: 89 e5 mov %esp,%ebp 3: 5d pop %ebp 4: c3 ret _gcov.o: file format elf32-i386 Disassembly of section .text: 00000000 <__gcov_init>: 0: 55 push %ebp 1: 89 e5 mov %esp,%ebp 3: 5d pop %ebp 4: c3 ret The gcov within the GCC 6.3.0 was build with following flags: /usr/gnu/gcc/V6.3.0/gcc-6.3.0_build/./gcc/xgcc -B/usr/gnu/gcc/V6.3.0/gcc-6.3.0_build/./gcc/ -B/opt/V6.3.0/i686-elf/bin/ -B/opt/V6.3.0/i686-elf/lib/ -isystem /opt/V6.3.0/i686-elf/include -isystem /opt/V6.3.0/i686-elf/sys-include -fpic -O2 -mpreferred-stack-boundary=3 -O2 -fpic -O2 -mpreferred-stack-boundary=3 -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -isystem ./include -fpic -g -DIN_LIBGCC2 -fbuilding-libgcc -fno-stack-protector -Dinhibit_libc -fpic -I. -I. -I../.././gcc -I../../../gcc-6.3.0/libgcc -I../../../gcc-6.3.0/libgcc/. -I../../../gcc-6.3.0/libgcc/../gcc -I../../../gcc-6.3.0/libgcc/../include -o _gcov_flush.o -MT _gcov_flush.o -MD -MP -MF _gcov_flush.dep -DL_gcov_flush -c ../../../gcc-6.3.0/libgcc/libgcov-interface.c Any idea what could be wrong with the gcov library?