Juan Carlos Franzoy wrote:
Hello. I am having problems traying to call __sync_fetch_and_add(int,int). Does anybody know what I'm missing?
the program is a.c:
------------------------ a.c ----------------------------
int i = 0;
int main() {
int b = __sync_fetch_and_add( &i, 1 );
return b;
}
----------------------- end of a.c ----------------------
The error is:
-----------------------------------------------------------------
$ /usr/local/gcc-4.2.2/bin/gcc -oa a.c
/tmp/ccaiRBpH.o(.text+0x21): In function `main':
: undefined reference to `__sync_fetch_and_add_4'
collect2: ld returned 1 exit status
gcc may be defaulting to generating i386 code for compatibility.
I suggest you try -march=CPU
-march=CPU/-mtune=CPU generate code/optimize for CPU, where CPU is one of:
i386, i486, pentium, pentiumpro, pentium4, nocona,
yonah, merom, k6, athlon, k8, generic32, generic64
Andrew.
