configure throws an error as it does not seem to find uint64_t type, err help! configure:19663: checking for uint64_t configure:19688: gcc -c -g -O2 conftest.c >&5 In file included from /usr/include/iso/stdio_iso.h:34, from /opt/csw/gcc3/lib/gcc/sparc-sun-solaris2.9/3.4.1/include/stdio.h:36, from configure:19697: /usr/include/sys/feature_tests.h:281:2: #error "Compiler or options invalid; UNIX 03 and POSIX.1-2001 applications require the use of c99" configure:19691: $? = 1 configure: failed program was: | #line 19668 "configure" | /* confdefs.h. */ | | #define PACKAGE_NAME "IceS" | #define PACKAGE_TARNAME "ices" | #define PACKAGE_VERSION "2.0.0" | #define PACKAGE_STRING "IceS 2.0.0" | #define PACKAGE_BUGREPORT "icecast@xiph.org" | #define PACKAGE "ices" | #define VERSION "2.0.0" | #define STDC_HEADERS 1 | #define HAVE_SYS_TYPES_H 1 | #define HAVE_SYS_STAT_H 1 | #define HAVE_STDLIB_H 1 | #define HAVE_STRING_H 1 | #define HAVE_MEMORY_H 1 | #define HAVE_STRINGS_H 1 | #define HAVE_INTTYPES_H 1 | #define HAVE_STDINT_H 1 | #define HAVE_UNISTD_H 1 | #define HAVE_DLFCN_H 1 | #ifdef __cplusplus | #include <stdlib.h> | #endif | #define _XOPEN_SOURCE 600 | #define __EXTENSIONS__ 1 | #define _GNU_SOURCE | #define STDC_HEADERS 1 | #define WORDS_BIGENDIAN 1 | /* end confdefs.h. */ | #include <stdio.h> | #if HAVE_SYS_TYPES_H | # include <sys/types.h> | #endif | #if HAVE_SYS_STAT_H | # include <sys/stat.h> | #endif | #if STDC_HEADERS | # include <stdlib.h> | # include <stddef.h> | #else | # if HAVE_STDLIB_H | # include <stdlib.h> | # endif | #endif | #if HAVE_STRING_H | # if !STDC_HEADERS && HAVE_MEMORY_H | # include <memory.h> | # endif | # include <string.h> | #endif | #if HAVE_STRINGS_H | # include <strings.h> | #endif | #if HAVE_INTTYPES_H | # include <inttypes.h> | #else | # if HAVE_STDINT_H | # include <stdint.h> | # endif | #endif | #if HAVE_UNISTD_H | # include <unistd.h> | #endif | int | main () | { | if ((uint64_t *) 0) | return 0; | if (sizeof (uint64_t)) | return 0; | ; | return 0; | } configure:19708: result: no configure:19718: error: could not find a uint64_t type Any idea on how to fix this?