Some more autoconf cleanups

Replace integer type width detection with C99 fixed-width types.
Also remove some unused or obsolete code.

Thanks to Ruben Kerkhof for the patchset.

aclocal.m4

 dnl ** Additional Autoconf tests for BIRD configure script
 dnl ** (c) 1999 Martin Mares <mj@ucw.cz>
 
-AC_DEFUN([BIRD_CHECK_INTEGERS],
-[AC_CHECK_SIZEOF(char, 0)
-AC_CHECK_SIZEOF(short int, 0)
-AC_CHECK_SIZEOF(int, 0)
-AC_CHECK_SIZEOF(long int, 0)
-AC_CHECK_SIZEOF(long long int, 0)
-AH_TEMPLATE([INTEGER_8],  [8-bit integer type])
-AH_TEMPLATE([INTEGER_16], [16-bit integer type])
-AH_TEMPLATE([INTEGER_32], [32-bit integer type])
-AH_TEMPLATE([INTEGER_64], [64-bit integer type])
-
-for size in 1 2 4 8; do
-	bits=`expr $size "*" 8`
-	AC_MSG_CHECKING([for $bits-bit type])
-	if test $ac_cv_sizeof_int = $size ; then
-		res=int
-	elif test $ac_cv_sizeof_char = $size ; then
-		res=char
-	elif test $ac_cv_sizeof_short_int = $size ; then
-		res="short int"
-	elif test $ac_cv_sizeof_long_int = $size ; then
-		res="long int"
-	elif test $ac_cv_sizeof_long_long_int = $size ; then
-		res="long long int"
-	else
-		AC_MSG_RESULT([not found])
-		AC_MSG_ERROR([Cannot find $bits-bit integer type.])
-	fi
-	AC_MSG_RESULT($res)
-	AC_DEFINE_UNQUOTED(INTEGER_$bits, $res)
-	done
-])
-
-dnl BIRD_CHECK_ENDIAN is unused and obsolete
-AC_DEFUN([BIRD_CHECK_ENDIAN],
-[AC_CACHE_CHECK([CPU endianity], bird_cv_c_endian,[
-AC_TRY_RUN([
-#include <stdio.h>
-
-unsigned int x = 0x12345678;
-unsigned char *z = (unsigned char *) &x;
-
-int main(void)
-{
-  FILE *f = fopen("conftestresult", "w");
-  if (!f) return 10;
-  fprintf(f, "%02x %02x %02x %02x", *z, *(z+1), *(z+2), *(z+3));
-  fclose(f);
-  exit(0);
-}
-],[
-	endian=`cat conftestresult`
-	if test "$endian" = "12 34 56 78" ; then
-		bird_cv_c_endian=big-endian
-	elif test "$endian" = "78 56 34 12" ; then
-		bird_cv_c_endian=little-endian
-	fi
-],[endian="test program failed"],[endian="not available, we're cross compiling"])
-if test -z "$bird_cv_c_endian" ; then
-	AC_MSG_RESULT($endian)
-	AC_MSG_ERROR([Cannot determine CPU endianity.])
-	fi
-])
-case $bird_cv_c_endian in
-	big-endian)	AC_DEFINE(CPU_BIG_ENDIAN) ;;
-	little-endian)	AC_DEFINE(CPU_LITTLE_ENDIAN) ;;
-	esac
-])
-
 AC_DEFUN([BIRD_CHECK_STRUCT_ALIGN],
 [AC_CACHE_CHECK([usual alignment of structures],bird_cv_c_struct_align,[
 AC_TRY_RUN([
@@ -126,18 +57,6 @@ case "$bird_cv_type_time_t" in
 	esac
 ])
 
-AC_DEFUN([BIRD_CHECK_STRUCT_IP_MREQN],
-[AC_CACHE_CHECK([for struct ip_mreqn], bird_cv_struct_ip_mreqn,[
-AC_TRY_COMPILE([#include <netinet/in.h>
-],[struct ip_mreqn x;
-],[bird_cv_struct_ip_mreqn=yes
-],[bird_cv_struct_ip_mreqn=no
-])])
-if test "$bird_cv_struct_ip_mreqn" = yes ; then
-	AC_DEFINE([HAVE_STRUCT_IP_MREQN], [1], [Define to 1 if you have struct ip_mreqn])
-fi
-])
-
 AC_DEFUN([BIRD_CHECK_PTHREADS],
 [
   bird_tmp_cflags="$CFLAGS"
@@ -170,7 +89,7 @@ AC_DEFUN([BIRD_ADD_GCC_OPTION],
 
 # BIRD_CHECK_PROG_FLAVOR_GNU(PROGRAM-PATH, IF-SUCCESS, [IF-FAILURE])
 # copied autoconf internal _AC_PATH_PROG_FLAVOR_GNU
-m4_define([BIRD_CHECK_PROG_FLAVOR_GNU],
+AC_DEFUN([BIRD_CHECK_PROG_FLAVOR_GNU],
 [# Check for GNU $1
 case `"$1" --version 2>&1` in
 *GNU*)
@@ -179,4 +98,4 @@ m4_ifval([$3],
 [*)
   $3;;
 ])esac
-])#
+])

configure.ac

@@ -69,7 +69,7 @@ fi
 AC_SUBST(CONFIG_FILE)
 AC_SUBST(CONTROL_SOCKET)
 
-AC_SEARCH_LIBS(clock_gettime, [c rt posix4], ,
+AC_SEARCH_LIBS(clock_gettime, [rt posix4], ,
 	AC_MSG_ERROR([[Function clock_gettime not available.]]))
 
 AC_CANONICAL_HOST
@@ -84,14 +84,6 @@ if test -z "$GCC" ; then
 	AC_MSG_ERROR([This program requires the GNU C Compiler.])
 fi
 
-# Enable threads by default just in Linux and FreeBSD
-#if test "$enable_pthreads" = try ; then
-#	case "$host_os" in
-#		(linux* | freebsd* | openbsd* | netbsd* )	enable_pthreads=try ;;
-#		(*)				enable_pthreads=no ;;
-#	esac
-#fi
-
 if test "$enable_pthreads" != no ; then
 	BIRD_CHECK_PTHREADS
 
@@ -248,8 +240,8 @@ case $sysdesc in
 		;;
 esac
 
-AC_CHECK_HEADER(syslog.h, [AC_DEFINE([HAVE_SYSLOG], [1], [Define to 1 if you have the <syslog.h> header file])])
-AC_CHECK_HEADER(alloca.h, [AC_DEFINE([HAVE_ALLOCA_H], [1], [Define to 1 if you have the <alloca.h> header file])])
+AC_CHECK_HEADERS_ONCE([alloca.h syslog.h])
+
 AC_MSG_CHECKING(whether 'struct sockaddr' has sa_len)
 AC_COMPILE_IFELSE([
   AC_LANG_PROGRAM(
@@ -275,10 +267,8 @@ AC_C_BIGENDIAN(
   [AC_MSG_ERROR([Cannot determine CPU endianity.])]
 )
 
-BIRD_CHECK_INTEGERS
 BIRD_CHECK_STRUCT_ALIGN
 BIRD_CHECK_TIME_T
-BIRD_CHECK_STRUCT_IP_MREQN
 
 if test "$enable_debug" = yes ; then
 	AC_DEFINE([DEBUGGING], [1], [Define to 1 if debugging is enabled])

sysdep/config.h

@@ -24,16 +24,18 @@
 #include "sysdep/paths.h"
 
 /* Types */
-typedef signed INTEGER_8 s8;
-typedef unsigned INTEGER_8 u8;
-typedef INTEGER_16 s16;
-typedef unsigned INTEGER_16 u16;
-typedef INTEGER_32 s32;
-typedef unsigned INTEGER_32 u32;
-typedef INTEGER_64 s64;
-typedef unsigned INTEGER_64 u64;
-typedef u8 byte;
-typedef u16 word;
+
+#include <stdint.h>
+typedef int8_t s8;
+typedef uint8_t u8;
+typedef int16_t s16;
+typedef uint16_t u16;
+typedef int32_t s32;
+typedef uint32_t u32;
+typedef int64_t s64;
+typedef uint64_t u64;
+typedef uint8_t byte;
+typedef uint16_t word;
 typedef unsigned int uint;
 
 #endif

sysdep/linux/sysio.h

@@ -7,16 +7,6 @@
  */
 
 
-#ifndef HAVE_STRUCT_IP_MREQN
-/* Several versions of glibc don't define this structure, so we have to do it ourselves */
-struct ip_mreqn
-{
-  struct in_addr imr_multiaddr;			/* IP multicast address of group */
-  struct in_addr imr_address;			/* local IP address of interface */
-  int		 imr_ifindex;			/* Interface index */
-};
-#endif
-
 #ifndef IP_MINTTL
 #define IP_MINTTL 21
 #endif

sysdep/unix/log.c

@@ -56,7 +56,7 @@ static int main_thread_self(void) { return 1; }
 #endif
 
 
-#ifdef HAVE_SYSLOG
+#ifdef HAVE_SYSLOG_H
 #include <sys/syslog.h>
 
 static int syslog_priorities[] = {
@@ -127,7 +127,7 @@ log_commit(int class, buffer *buf)
 	  fputc('\n', l->fh);
 	  fflush(l->fh);
 	}
-#ifdef HAVE_SYSLOG
+#ifdef HAVE_SYSLOG_H
       else
 	syslog(syslog_priorities[class], "%s", buf->start);
 #endif
@@ -262,7 +262,7 @@ default_log_list(int debug, int init, char **syslog_name)
   init_list(&init_log_list);
   *syslog_name = NULL;
 
-#ifdef HAVE_SYSLOG
+#ifdef HAVE_SYSLOG_H
   if (!debug)
     {
       static struct log_config lc_syslog = { .mask = ~0 };
@@ -287,7 +287,7 @@ log_switch(int debug, list *l, char *new_syslog_name)
 
   current_log_list = l;
 
-#ifdef HAVE_SYSLOG
+#ifdef HAVE_SYSLOG_H
   if (current_syslog_name && new_syslog_name &&
       !strcmp(current_syslog_name, new_syslog_name))
     return;