司徒在編譯Pandora的Perf工具時,tools/perf/util/probe-finder.c遇到implicit declaration of function getline問題,網路上找到的解法大致上是沒有定義_GNU_SOURCE和_POSIX_C_SOURCE 200809L的問題,不過Pandora的Library比較特別,即使定義__USE_GNU也是無效,最後只好重新抄寫一份,就可以成功編譯Perf工具了
int getline(char **lineptr, size_t *n, FILE *stream); int getline(char **lineptr, size_t *n, FILE *stream) { static char line[256]; char *ptr; unsigned int len; if (lineptr == NULL || n == NULL) { errno = EINVAL; return -1; } if (ferror(stream)) { return -1; } if (feof(stream)) { return -1; } ptr = fgets(line, 256, stream); ptr = strchr(line, '\n'); if (ptr) { *ptr = '\0'; } len = strlen(line); if ((len + 1) < 256) { ptr = realloc(*lineptr, 256); if (ptr == NULL) { return(-1); } *lineptr = ptr; *n = 256; } strcpy(*lineptr, line); return len; }