Hi all,
finally we figured out the problem:
When compiling gcc for arm-elf targets the file _gcov.o is generated using
the following line
/home/haidingerw/build-gcc/gcc/xgcc -B/home/haidingerw/build-gcc/gcc/
-B/usr/local/arm-elf/bin/ -B/usr/local/arm-elf/lib/ -isystem
/usr/local/arm-elf/include -isystem /usr/local/arm-elf/sys-include -O2
-DIN_GCC -DCROSS_COMPILE -W -Wall -Wwrite-strings -Wstrict-prototypes
-Wmissing-prototypes -Wold-style-definition -isystem ./include
-Dinhibit_libc -fno-inline -g -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED
-Dinhibit_libc -I. -I. -I../../gcc-3.4.3/gcc -I../../gcc-3.4.3/gcc/.
-I../../gcc-3.4.3/gcc/../include -DL_gcov -c
../../gcc-3.4.3/gcc/libgcov.c -o libgcc/./_gcov.o
The problem is the define of "inhibit_libc" (-Dinhibit_libc), since this
causes the generation of dummy functions.
==============================
/* file gcc/libgcov.c */
#if defined(inhibit_libc)
/* If libc and its header files are not available, provide dummy
functions. */
#ifdef L_gcov
void __gcov_init (struct gcov_info *p __attribute__ ((unused))) {}
void __gcov_flush (void) {}
#endif
#ifdef L_gcov_merge_add
void __gcov_merge_add (gcov_type *counters __attribute__ ((unused)),
unsigned n_counters __attribute__ ((unused))) {}
#endif
#ifdef L_gcov_merge_single
void __gcov_merge_single (gcov_type *counters __attribute__ ((unused)),
unsigned n_counters __attribute__ ((unused))) {}
#endif
#ifdef L_gcov_merge_delta
void __gcov_merge_delta (gcov_type *counters __attribute__ ((unused)),
unsigned n_counters __attribute__ ((unused))) {}
#endif
==============================
Thus we draw the conclusion that coverage analysis in conjunction with
arm-elf is not supported by the gcc.
Will there be a chance in the near future that gcc supports coverage
analysis in conjunction with arm-elf targets?
Grüße
Wolfgang Haidinger
---
Wolfgang Haidinger
B&R Industrie-Elektronik GmbH
BU Controls, Safety
Tel: +43 (0)7748 6586 1121
eMail: wolfgang.haidinger@xxxxxxxxxxxxxxxxx
