char* strval = SvPV(str);

that's been wrong I did C-module to PERL, it's opposite using PERL in C-lang. that's my source which I'm using as C-module to PERL.

int tst(int len,char **str) {
printf("called c from perl len:'%i'  str:'%s' \n", len, str);
return 1;
}
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Your function name is tst in C while it is test in perl. Is is the way it should be?

no, of course not, because I've posted there different outputs from just c-programm and module compiled to perl and called from perl, above...