diff --git a/.gitignore b/.gitignore
index bcf2e5076dd00eab4f8999fefaebd9e6ff321657..4098d335002b4c4e9466cb1d64fdbe62cc691c42 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,6 +5,8 @@ config.cache
 config.log
 config.status
 config.h
+config.warnings
+config.h.in
 make_variables
 modlist_segment
 module.pmod
diff --git a/config.h.in b/config.h.in
deleted file mode 100644
index 6723ea4ba7973c916a46929133de9e0274d93376..0000000000000000000000000000000000000000
--- a/config.h.in
+++ /dev/null
@@ -1,671 +0,0 @@
-/* config.h.in.  Generated from configure.in by autoheader.  */
-/*
-|| This file is part of Pike. For copyright information see COPYRIGHT.
-|| Pike is distributed under GPL, LGPL and MPL. See the file COPYING
-|| for more information.
-*/
-
-#ifndef MACHINE_H
-#define MACHINE_H
-
-/* We must define this *always* */
-#ifndef POSIX_SOURCE
-#define POSIX_SOURCE	1
-#endif
-
-/* Get more declarations in GNU libc. */
-#ifndef _GNU_SOURCE
-#define _GNU_SOURCE
-#endif
-
-/* Get more declarations from AIX libc. */
-#ifndef _ALL_SOURCE
-#define _ALL_SOURCE
-#endif
-
-/* Building as a library? */
-#undef LIBPIKE
-
-/* Where's the master.pike file installed? */
-#define DEFAULT_MASTER "@prefix@/lib/pike/master.pike"
-
-/* Define this if you want run time self tests */
-#undef PIKE_DEBUG
-
-/* Define this if you want some extra (possibly verbose) run time self tests */
-#undef PIKE_EXTRA_DEBUG
-
-/* Define to make Pike do a full cleanup at exit to detect leaks. */
-#undef DO_PIKE_CLEANUP
-
-/* Define this if you want pike to interact with valgrind. */
-#undef USE_VALGRIND
-
-/* Define this to embed DTrace probes */
-#undef USE_DTRACE
-
-/* Define this if you are going to use a memory access checker (like Purify) */
-#undef __CHECKER__
-
-/* Defined if Doug Leas malloc implementation is used. */
-#undef USE_DL_MALLOC
-
-/* Define this if you want malloc debugging */
-#undef DEBUG_MALLOC
-
-/* Define this if you want checkpoints */
-#undef DMALLOC_TRACE
-
-/* Define this if you want backtraces for C code in your dmalloc output. */
-#undef DMALLOC_C_STACK_TRACE
-
-/* Define this if you want dmalloc to keep track of freed memory. */
-#undef DMALLOC_TRACK_FREE
-
-/* With this, dmalloc will trace malloc(3) calls */
-#undef ENCAPSULATE_MALLOC
-
-/* With this, dmalloc will report leaks made by malloc(3) calls */
-#undef REPORT_ENCAPSULATED_MALLOC
-
-/* Define this to simulate dynamic module loading with static modules. */
-#undef USE_SEMIDYNAMIC_MODULES
-
-/* Define this if you want to enable the shared nodes mode of the optimizer. */
-#undef SHARED_NODES
-
-/* Define this to use the new keypair loop. */
-#undef PIKE_MAPPING_KEYPAIR_LOOP
-
-/* Enable profiling */
-#undef PROFILING
-
-/* Enable internal profiling */
-#undef INTERNAL_PROFILING
-
-/* If possible, the expansion for a "#define short" to avoid that bison
- * uses short everywhere internally. */
-#undef BISON_SHORT_EXPANSION
-
-/* The following USE_* are used by smartlink */
-/* Define this if your ld sets the run path with -rpath */
-#undef USE_RPATH
-
-/* Define this if your ld sets the run path with -R */
-#undef USE_R
-
-/* Define this if your ld sets the run path with -YP, */
-#undef USE_YP_
-
-/* Define this if your ld sets the run path with +b */
-#undef USE_PLUS_b
-
-/* Define this if your ld uses -rpath, but your cc wants -Wl,-rpath, */
-#undef USE_Wl
-
-/* Define this if your ld uses -R, but your cc wants -Wl,-R */
-#undef USE_Wl_R
-
-/* Define this if your ld uses -rpath, but your cc -Qoption,ld,-rpath (icc) */
-#undef USE_Qoption
-
-/* Define this if your ld uses -YP, , but your cc wants -Xlinker -YP, */
-#undef USE_XLINKER_YP_
-
-/* Define this if your ld doesn't have an option to set the run path */
-#undef USE_LD_LIBRARY_PATH
-
-/* Define this on OS X to get two-level namespace support in ld */
-#undef USE_OSX_TWOLEVEL_NAMESPACE
-
-/* Define if your tcc supports #pragma TenDRA longlong type allow. */
-#undef HAVE_PRAGMA_TENDRA_LONGLONG
-
-/* Define if your tcc supports #pragma TenDRA set longlong type : long long. */
-#undef HAVE_PRAGMA_TENDRA_SET_LONGLONG_TYPE
-
-/* The worlds most stringent C compiler? */
-#ifdef __TenDRA__
-/* We want to be able to use 64bit arithmetic */
-#ifdef HAVE_PRAGMA_TENDRA_LONGLONG
-#pragma TenDRA longlong type allow
-#endif /* HAVE_PRAGMA_TENDRA_LONGLONG */
-#ifdef HAVE_PRAGMA_TENDRA_SET_LONGLONG_TYPE
-#pragma TenDRA set longlong type : long long
-#endif /* HAVE_PRAGMA_TENDRA_SET_LONGLONG_TYPE */
-
-#ifdef _NO_LONGLONG
-#undef _NO_LONGLONG
-#endif /* _NO_LONGLONG */
-#endif /* __TenDRA__ */
-
-
-/* Define this if your compiler attempts to use _chkstk, but libc contains
- * __chkstk. */
-#undef HAVE_BROKEN_CHKSTK
-
-/* Define for solaris */
-#undef SOLARIS
-
-/* Define if the closedir function returns void instead of int.  */
-#undef VOID_CLOSEDIR
-
-/* Define to 'int' if <sys/time.h> doesn't */
-#undef time_t
-
-/* Define to 'short' if <sys/types.h> doesn't */
-#undef pri_t
-
-/* Define to 'int' if <sys/types.h> doesn't */
-#undef uid_t
-
-/* Define to 'int' if <sys/types.h> doesn't */
-#undef gid_t
-
-/* Define to 'int' if <sys/types.h> doesn't */
-#undef pid_t
-
-/* Define to 'unsigned long' if <sys/types.h> or <stddef.h> doesn't */
-#undef size_t
-
-/* Define to 'long' if <sys/types.h> of <stddef.h> doesn't */
-#undef ptrdiff_t
-
-/* Define to 'long' if <sys/types.h> doesn't */
-#undef off_t
-
-/* Define to 'int' if <signal.h> doesn't */
-#undef sig_atomic_t
-
-/* Define as the return type of signal handlers (int or void).  */
-#undef RETSIGTYPE
-
-/* define this if igonoring SIGFPE helps with core dumps */
-#undef IGNORE_SIGFPE
-
-/* define if you want to use double precision floats instead of single */
-#undef WITH_DOUBLE_PRECISION_SVALUE
-
-/* define if you want to use long double precision floats */
-#undef WITH_LONG_DOUBLE_PRECISION_SVALUE
-
-/* define to the type of pike floats */
-#undef FLOAT_TYPE
-
-/* define to the size of pike floats */
-#undef SIZEOF_FLOAT_TYPE
-
-/* force this type upon ints */
-#undef WITH_LONG_INT
-#undef WITH_LONG_LONG_INT
-#undef WITH_INT_INT
-
-/* define to the type of pike primitive ints */
-#undef INT_TYPE
-
-/* define to the size of pike primitive ints */
-#undef SIZEOF_INT_TYPE
-
-/* If using the C implementation of alloca, define if you know the
- * direction of stack growth for your system; otherwise it will be
- * automatically deduced at run-time.
- *	STACK_DIRECTION > 0 => grows toward higher addresses
- *	STACK_DIRECTION < 0 => grows toward lower addresses
- *	STACK_DIRECTION = 0 => direction of growth unknown
- *
- * Also used by Pike's runtime C-stack checker.
- */
-#undef STACK_DIRECTION
-
-/* Define this to the number of KB in the initial stack,
- * currently this is 1 Mb on FreeBSD, 2Mb on Linux and
- * unlimited (undefined) everywhere else
- */
-#undef Pike_INITIAL_STACK_SIZE
-
-/* If so, is it restricted to user and system time? */
-#undef GETRUSAGE_RESTRICTED
-
-/* Solaris has rusage as an ioctl on procfs */
-#undef GETRUSAGE_THROUGH_PROCFS
-
-/* So has True64, but no useful information in prstatus_t */
-#undef GETRUSAGE_THROUGH_PROCFS_PRS
-
-/* Define if you have _isnan */
-#undef HAVE__ISNAN
-
-/* Define if you have isfinite */
-#undef HAVE_ISFINITE
-
-/* Define if you have fork */
-#undef HAVE_FORK
-
-/* Define if you have fpsetmask */
-#undef HAVE_FPSETMASK
-
-/* Define if you have fpsetround */
-#undef HAVE_FPSETROUND
-
-/* Define if you have isless */
-#undef HAVE_ISLESS
-
-/* Define if you have isunordered */
-#undef HAVE_ISUNORDERED
-
-/* Define if you have crypt.  */
-#undef HAVE_CRYPT
-
-/* Define if you have ualarm. */
-#undef HAVE_UALARM
-
-/* Define if your ualarm takes two args. */
-#undef UALARM_TAKES_TWO_ARGS
-
-/* Define if your ptrace takes four args. */
-#undef PTRACE_TAKES_FOUR_ARGS
-
-/* Define if argument 3 to ptrace is a pointer type. */
-#undef PTRACE_ADDR_TYPE_IS_POINTER
-
-/* Define if gettimeofday takes to arguments */
-#undef GETTIMEOFDAY_TAKES_TWO_ARGS
-
-/* Define if realloc(NULL, SZ) works. */
-#undef HAVE_WORKING_REALLOC_NULL
-
-/* Define if gethrvtime works (i.e. even without ptime). */
-#undef HAVE_WORKING_GETHRVTIME
-
-/* Define if you have gethrtime */
-#undef HAVE_GETHRTIME
-
-/* Can we make our own gethrtime? */
-#undef OWN_GETHRTIME
-
-/* ... by using the RDTSC instruction? */
-#undef OWN_GETHRTIME_RDTSC
-
-/* Define if it is possible to allocate PROT_EXEC memory with mmap */
-#undef MEXEC_USES_MMAP
-
-/* Define if you have gethostname */
-#undef HAVE_GETHOSTNAME
-
-/* Define this if you have dlopen */
-#undef HAVE_DLOPEN
-
-/* Define if your signals are one-shot */
-#undef SIGNAL_ONESHOT
-
-/* Define this if eval_instruction gets large on your platform. */
-#undef PIKE_SMALL_EVAL_INSTRUCTION
-
-/* Define if you have gcc-style computed goto, and want to use them. */
-#undef HAVE_COMPUTED_GOTO
-
-/* Define this to use machine code */
-#undef PIKE_USE_MACHINE_CODE
-
-/* Define if you have the RDTSC instruction */
-#undef HAVE_RDTSC
-
-/* Define this to one of the available bytecode methods. */
-#undef PIKE_BYTECODE_METHOD
-
-/* You have gcc-type function attributes? */
-#undef HAVE_FUNCTION_ATTRIBUTES
-
-/* You have cl-type __declspec? */
-#undef HAVE_DECLSPEC
-
-/* Your va_list is a state pointer? */
-#undef VA_LIST_IS_STATE_PTR
-
-/* Defined if va_copy exists in stdarg.h. */
-#undef HAVE_VA_COPY
-
-/* Does your compiler grock 'volatile' */
-#define VOLATILE volatile
-
-/* Define to empty if your compiler doesn't support C99's restrict keyword. */
-#undef restrict
-
-/* Define this if your compiler doesn't allow cast of void * to function pointer */
-#undef NO_CAST_TO_FUN
-
-/* How to extract a char and an unsigned char from a char * */
-#undef EXTRACT_CHAR_BY_CAST
-#undef EXTRACT_UCHAR_BY_CAST
-
-/* Do you have IEEE floats and/or doubles (either big or little endian) ? */
-#undef FLOAT_IS_IEEE_BIG
-#undef FLOAT_IS_IEEE_LITTLE
-#undef DOUBLE_IS_IEEE_BIG
-#undef DOUBLE_IS_IEEE_LITTLE
-
-/* The rest of this file is just to eliminate warnings */
-
-/* define if declaration of strchr is missing */
-#undef STRCHR_DECL_MISSING
-
-/* define if declaration of malloc is missing */
-#undef MALLOC_DECL_MISSING
-
-/* define if declaration of getpeername is missing */
-#undef GETPEERNAME_DECL_MISSING
-
-/* define if declaration of gethostname is missing */
-#undef GETHOSTNAME_DECL_MISSING
-
-/* define if declaration of popen is missing */
-#undef POPEN_DECL_MISSING
-
-/* define if declaration of getenv is missing */
-#undef GETENV_DECL_MISSING
-
-/* define if you are using crypt.c. */
-#undef USE_CRYPT_C
-
-/* Define if we can declare 'extern char **environ' */
-#undef DECLARE_ENVIRON
-
-/* The byteorder your machine use, most use 4321, PC use 1234 */
-#define PIKE_BYTEORDER 0
-
-/* What alignment do pointers need */
-#define PIKE_POINTER_ALIGNMENT 4
-
-/* Assembler prefix for general purpose registers */
-#undef PIKE_CPU_REG_PREFIX
-
-/* define this if #include <time.h> provides an external int timezone */
-#undef HAVE_EXTERNAL_TIMEZONE
-
-/* define this if your struct tm has a tm_gmtoff */
-#undef STRUCT_TM_HAS_GMTOFF
-
-/* define this if your struct tm has a __tm_gmtoff */
-#undef STRUCT_TM_HAS___TM_GMTOFF
-
-/* Define if you have struct timeval */
-#undef HAVE_STRUCT_TIMEVAL
-
-/* Define if you have struct sockaddr_in6 */
-#undef HAVE_STRUCT_SOCKADDR_IN6
-
-/* Define this if you have a struct iovec */
-#undef HAVE_STRUCT_IOVEC
-
-/* Define this if you have a struct msghdr */
-#undef HAVE_STRUCT_MSGHDR
-
-/* Define this if you have a struct msghdr with 'msg_control' member */
-#undef HAVE_STRUCT_MSGHDR_MSG_CONTROL
-
-/* Define this if you have a struct msghdr with 'msg_accrights' member */
-#undef HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS
-
-/* Define this to the max value of an unsigned short unless <limits.h> does.. */
-#undef USHRT_MAX
-
-/* Define these if you are going to use threads */
-#undef PIKE_THREADS
-#undef _REENTRANT
-#undef _THREAD_SAFE
-
-/* Define this if you want the UNIX taste of threads */
-#undef _UNIX_THREADS
-
-/* Define this if you want the POSIX taste of threads */
-#undef _MIT_POSIX_THREADS
-
-/* Define this if you want the SGI sproc taste of threads */
-#undef _SGI_SPROC_THREADS
-#undef _SGI_MP_SOURCE
-
-/* Define this if you have Windows NT threads */
-#undef NT_THREADS
-
-/* Use DDLs for dynamically linked modules on NT. */
-#undef USE_DLL
-
-/* Define this if your THREAD_T type is a pointer type. */
-#undef PIKE_THREAD_T_IS_POINTER
-
-/* Define to the flag to get an error checking mutex, if supported. */
-#undef PIKE_MUTEX_ERRORCHECK
-
-/* Define to the flag to get a recursive mutex, if supported. */
-#undef PIKE_MUTEX_RECURSIVE
-
-/* Define this if your pthreads have pthread_condattr_default */
-#undef HAVE_PTHREAD_CONDATTR_DEFAULT
-
-/* Define this if you need to use &pthread_condattr_default in cond_init() */
-#undef HAVE_PTHREAD_CONDATTR_DEFAULT_AIX
-
-/* Define if you have the pthread_attr_setstacksize function.  */
-#undef HAVE_PTHREAD_ATTR_SETSTACKSIZE
-
-/* Define if you have the pthread_atfork function.  */
-#undef HAVE_PTHREAD_ATFORK
-
-/* Define if you have the pthread_cond_init function.  */
-#undef HAVE_PTHREAD_COND_INIT
-
-/* Define if you have the pthread_yield function.  */
-#undef HAVE_PTHREAD_YIELD
-
-/* Define if you have the pthread_yield_np function.  */
-#undef HAVE_PTHREAD_YIELD_NP
-
-/* Hack for stupid glibc linuxthreads */
-#undef HAVE_PTHREAD_INITIAL_THREAD_BOS
-
-/* Define if your OS has the union wait. */
-#undef HAVE_UNION_WAIT
-
-/* Define if your cpp supports the ANSI concatenation operator ## */
-#undef HAVE_ANSI_CONCAT
-
-/* Define if you don't have F_SETFD, or it doesn't work */
-#undef HAVE_BROKEN_F_SETFD
-
-/* Define if your thread implementation doesn't propagate euid & egid. */
-#undef HAVE_BROKEN_LINUX_THREAD_EUID
-
-/* Define if your cpp supports K&R-style concatenation */
-#undef HAVE_KR_CONCAT
-
-/* Use poll() instead of select() ? */
-#undef HAVE_AND_USE_POLL
-
-/* Enable use of /dev/epoll on Linux. */
-#undef WITH_EPOLL
-
-/* Define to the poll device (eg "/dev/poll") */
-#undef PIKE_POLL_DEVICE
-
-/* This works on Solaris or any UNIX where
- * waitpid can report ECHILD when running more than one at once
- * (or any UNIX where waitpid actually works)
- */
-#undef USE_WAIT_THREAD
-
-/* This works on Linux or any UNIX where
- * waitpid works or where threads and signals bugs in
- * less annoying ways than Solaris.
- */
-#undef USE_SIGCHILD
-
-/* Enable tracing of the compiler */
-#undef YYDEBUG
-
-/* Define if your compiler has a symbol __func__ */
-#undef HAVE_WORKING___FUNC__
-
-/* Define if your compiler has a symbol __FUNCTION__ */
-#undef HAVE_WORKING___FUNCTION__
-
-/* The last argument to accept() is an ACCEPT_SIZE_T * */
-#define ACCEPT_SIZE_T	int
-
-/* Define if you have the <sys/resource.h> header file.  */
-#undef HAVE_SYS_RESOURCE_H
-
-/* set this to the modifier type string to print size_t, like "" or "l" */
-#undef PRINTSIZET
-
-/* set this to the modifier type string to print ptrdiff_t, like "" or "l" */
-#undef PRINTPTRDIFFT
-
-/* set this to the modifier type string to print off_t if that type exists */
-#undef PRINTOFFT
-
-/* set this to the modifier type string to print INT64 if that type exists */
-#undef PRINTINT64
-
-/* Define when binary --disable-binary is used. */
-#undef DISABLE_BINARY
-
-/* Define to the size of the overhead for a malloc'ed block. (Slightly
- * too much is better than slightly too little.) */
-#undef PIKE_MALLOC_OVERHEAD
-
-/* Define to the page size (handled efficiently by malloc). */
-#undef PIKE_MALLOC_PAGE_SIZE
-
-/* PIKE_YES if the number reported by fallback_get_cpu_time (rusage.c)
- * is thread local, PIKE_NO if it isn't, PIKE_UNKNOWN if it couldn't
- * be established. */
-#undef FB_CPU_TIME_IS_THREAD_LOCAL
-
-
-/* Define to 1 if you have the <inttypes.h> header file. */
-#undef HAVE_INTTYPES_H
-
-/* Define to 1 if libsass has sass_delete_options() */
-#undef HAVE_LIBSASS_DELETE_OPTIONS
-
-/* Define to 1 if libsass has sass_language_version() */
-#undef HAVE_LIBSASS_LANGUAGE_VERSION
-
-/* Define to 1 if you have the <memory.h> header file. */
-#undef HAVE_MEMORY_H
-
-/* Define to 1 if you have the <sass.h> header file. */
-#undef HAVE_SASS_H
-
-/* Define to 1 if you have the <stdint.h> header file. */
-#undef HAVE_STDINT_H
-
-/* Define to 1 if you have the <stdlib.h> header file. */
-#undef HAVE_STDLIB_H
-
-/* Define to 1 if you have the <strings.h> header file. */
-#undef HAVE_STRINGS_H
-
-/* Define to 1 if you have the <string.h> header file. */
-#undef HAVE_STRING_H
-
-/* Define to 1 if you have the <sys/stat.h> header file. */
-#undef HAVE_SYS_STAT_H
-
-/* Define to 1 if you have the <sys/types.h> header file. */
-#undef HAVE_SYS_TYPES_H
-
-/* Define to 1 if you have the <unistd.h> header file. */
-#undef HAVE_UNISTD_H
-
-/* Define to the address where bug reports for this package should be sent. */
-#undef PACKAGE_BUGREPORT
-
-/* Define to the full name of this package. */
-#undef PACKAGE_NAME
-
-/* Define to the full name and version of this package. */
-#undef PACKAGE_STRING
-
-/* Define to the one symbol short name of this package. */
-#undef PACKAGE_TARNAME
-
-/* Define to the home page for this package. */
-#undef PACKAGE_URL
-
-/* Define to the version of this package. */
-#undef PACKAGE_VERSION
-
-/* Define to 1 if you have the ANSI C header files. */
-#undef STDC_HEADERS
-
-/* Define to the size of the c-stack for new threads */
-#undef PIKE_THREAD_C_STACK_SIZE
-
-/* NT stuff */
-#undef HAVE_GETSYSTEMTIMEASFILETIME
-#undef HAVE_LOADLIBRARY
-#undef HAVE_FREELIBRARY
-#undef HAVE_GETPROCADDRESS
-#undef DL_EXPORT
-#undef USE_MY_WIN32_DLOPEN
-
-/* CygWin kludge. */
-#if defined(HAVE_UNISTD_H) && defined(HAVE_WINDOWS_H)
-#undef HAVE_WINDOWS_H
-#undef HAVE_WINBASE_H
-#undef HAVE_WINSOCK_H
-#undef HAVE_WINSOCK2_H
-#undef HAVE_FD_FLOCK
-#endif /* HAVE_SYS_UNISTD_H && HAVE_WINDOWS_H */
-
-/* How to set a socket non-blocking */
-#undef USE_IOCTL_FIONBIO
-#undef USE_IOCTLSOCKET_FIONBIO
-#undef USE_FCNTL_O_NDELAY
-#undef USE_FCNTL_FNDELAY
-#undef USE_FCNTL_O_NONBLOCK
-
-/* How well is OOB TCP working?
- * -1 = unknown
- *  0 = doesn't seem to be working at all
- *  1 = very limited functionality
- *  2 = should be working as long as you are cautious
- *  3 = works excellently
- */
-#define PIKE_OOB_WORKS -1
-
-/* dlmalloc has mallinfo. */
-#if defined(USE_DL_MALLOC) && !defined(HAVE_MALLINFO)
-#define HAVE_MALLINFO
-
-#if defined (HAVE_MALLOC_H) && defined (HAVE_STRUCT_MALLINFO)
-#include <malloc.h>
-#else /* HAVE_MALLOC_H && HAVE_STRUCT_MALLINFO */
-
-#ifndef MALLINFO_FIELD_TYPE
-#define MALLINFO_FIELD_TYPE size_t
-#endif  /* MALLINFO_FIELD_TYPE */
-
-/* Needed for size_t. */
-#include <stddef.h>
-
-/* dlmalloc definition of struct mallinfo. */
-struct mallinfo {
-  MALLINFO_FIELD_TYPE arena;    /* non-mmapped space allocated from system */
-  MALLINFO_FIELD_TYPE ordblks;  /* number of free chunks */
-  MALLINFO_FIELD_TYPE smblks;   /* always 0 */
-  MALLINFO_FIELD_TYPE hblks;    /* always 0 */
-  MALLINFO_FIELD_TYPE hblkhd;   /* space in mmapped regions */
-  MALLINFO_FIELD_TYPE usmblks;  /* maximum total allocated space */
-  MALLINFO_FIELD_TYPE fsmblks;  /* always 0 */
-  MALLINFO_FIELD_TYPE uordblks; /* total allocated space */
-  MALLINFO_FIELD_TYPE fordblks; /* total free space */
-  MALLINFO_FIELD_TYPE keepcost; /* releasable (via malloc_trim) space */
-};
-
-#endif /* HAVE_USR_INCLUDE_MALLOC_H */
-
-#endif
-
-#endif /* MACHINE_H */
diff --git a/configure.in b/configure.in
index db9992fc4ca51e6e1cc3152085d77d70578e38d7..7d929ae3ff503c4841f45f9602b3d5bec9995831 100644
--- a/configure.in
+++ b/configure.in
@@ -12,7 +12,7 @@ AH_TEMPLATE([HAVE_LIBSASS_DELETE_OPTIONS],
 CMOD_LIBS="-lsass"
 CMOD_CFLAGS=""
 
-# AC_HAVE_HEADERS(sass.h)
+AC_HAVE_HEADERS(inttypes.h)
 AC_CHECK_HEADERS([sass.h])
 
 #