Brant Gurganus's autoconf updates.

This improves some obsolete autoconf macros and increases the minimum
autoconf version from 2.60 to 2.69.  Fixes bug 11369.

configure.ac

@@ -1,11 +1,11 @@
 dnl Process this file with autoconf to produce a configure script.
 
-AC_INIT([rsync], [3.1.2dev], [http://rsync.samba.org/bugzilla.html])
+AC_INIT([rsync],[3.1.2dev],[http://rsync.samba.org/bugzilla.html])
 
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_SRCDIR([byteorder.h])
 AC_CONFIG_HEADER(config.h)
-AC_PREREQ(2.60)
+AC_PREREQ([2.69])
 
 AC_SUBST(RSYNC_VERSION, $PACKAGE_VERSION)
 AC_MSG_NOTICE([Configuring rsync $PACKAGE_VERSION])
@@ -27,8 +27,7 @@ AC_CONFIG_LIBOBJ_DIR([lib])
 
 AC_MSG_CHECKING([whether to include debugging symbols])
 AC_ARG_ENABLE(debug,
-	AC_HELP_STRING([--disable-debug],
-		[disable debugging symbols and features]))
+	AS_HELP_STRING([--disable-debug],[disable debugging symbols and features]))
 
 if test x"$enable_debug" = x"no"; then
     AC_MSG_RESULT(no)
@@ -57,8 +56,7 @@ if test x"$ac_cv_prog_cc_stdc" = x"no"; then
 fi
 
 AC_ARG_ENABLE(profile,
-	AC_HELP_STRING([--enable-profile],
-		[turn on CPU profiling]))
+	AS_HELP_STRING([--enable-profile],[turn on CPU profiling]))
 if test x"$enable_profile" = x"yes"; then
 	CFLAGS="$CFLAGS -pg"
 fi
@@ -66,8 +64,7 @@ fi
 
 # Specifically, this turns on panic_action handling.
 AC_ARG_ENABLE(maintainer-mode,
-	AC_HELP_STRING([--enable-maintainer-mode],
-		[turn on extra debug features]))
+	AS_HELP_STRING([--enable-maintainer-mode],[turn on extra debug features]))
 if test x"$enable_maintainer_mode" = x"yes"; then
 	CFLAGS="$CFLAGS -DMAINTAINER_MODE"
 fi
@@ -83,26 +80,26 @@ if test x"$GCC" = x"yes"; then
 fi
 
 AC_ARG_WITH(included-popt,
-        AC_HELP_STRING([--with-included-popt], [use bundled popt library, not from system]))
+        AS_HELP_STRING([--with-included-popt],[use bundled popt library, not from system]))
 
 AC_ARG_WITH(included-zlib,
-        AC_HELP_STRING([--with-included-zlib], [use bundled zlib library, not from system]))
+        AS_HELP_STRING([--with-included-zlib],[use bundled zlib library, not from system]))
 
 AC_ARG_WITH(protected-args,
-        AC_HELP_STRING([--with-protected-args], [make --protected-args option the default]))
+        AS_HELP_STRING([--with-protected-args],[make --protected-args option the default]))
 if test x"$with_protected_args" = x"yes"; then
 	AC_DEFINE_UNQUOTED(RSYNC_USE_PROTECTED_ARGS, 1, [Define to 1 if --protected-args should be the default])
 fi
 
 AC_ARG_WITH(rsync-path,
-	AC_HELP_STRING([--with-rsync-path=PATH], [set default --rsync-path to PATH (default: rsync)]),
+	AS_HELP_STRING([--with-rsync-path=PATH],[set default --rsync-path to PATH (default: rsync)]),
 	[ RSYNC_PATH="$with_rsync_path" ],
 	[ RSYNC_PATH="rsync" ])
 
 AC_DEFINE_UNQUOTED(RSYNC_PATH, "$RSYNC_PATH", [location of rsync on remote machine])
 
 AC_ARG_WITH(rsyncd-conf,
-	AC_HELP_STRING([--with-rsyncd-conf=PATH], [set configuration file for rsync server to PATH (default: /etc/rsyncd.conf)]),
+	AS_HELP_STRING([--with-rsyncd-conf=PATH],[set configuration file for rsync server to PATH (default: /etc/rsyncd.conf)]),
 	[ if test ! -z "$with_rsyncd_conf" ; then
 		case $with_rsyncd_conf in
 			yes|no)
@@ -123,7 +120,7 @@ AC_ARG_WITH(rsyncd-conf,
 AC_DEFINE_UNQUOTED(RSYNCD_SYSCONF, "$RSYNCD_SYSCONF", [location of configuration file for rsync server])
 
 AC_ARG_WITH(rsh,
-	AC_HELP_STRING([--with-rsh=CMD], [set remote shell command to CMD (default: ssh)]))
+	AS_HELP_STRING([--with-rsh=CMD],[set remote shell command to CMD (default: ssh)]))
 
 AC_CHECK_PROG(HAVE_REMSH, remsh, 1, 0)
 if test x$HAVE_REMSH = x1; then
@@ -149,8 +146,7 @@ AC_PATH_PROG(SHELL_PATH, sh, /bin/sh, [/usr/xpg4/bin$PATH_SEPARATOR$PATH])
 AC_PATH_PROG(FAKEROOT_PATH, fakeroot, /usr/bin/fakeroot, [/usr/xpg4/bin$PATH_SEPARATOR$PATH])
 
 AC_ARG_WITH(nobody-group,
-    AC_HELP_STRING([--with-nobody-group=GROUP],
-		   [set the default unprivileged group (default nobody or nogroup)]),
+    AS_HELP_STRING([--with-nobody-group=GROUP],[set the default unprivileged group (default nobody or nogroup)]),
     [ NOBODY_GROUP="$with_nobody_group" ])
 
 if test x"$with_nobody_group" = x; then
@@ -171,7 +167,7 @@ AC_DEFINE_UNQUOTED(NOBODY_GROUP, "$NOBODY_GROUP", [unprivileged group for unpriv
 # arrgh. libc in some old debian version screwed up the largefile
 # stuff, getting byte range locking wrong
 AC_CACHE_CHECK([for broken largefile support],rsync_cv_HAVE_BROKEN_LARGEFILE,[
-AC_TRY_RUN([
+AC_RUN_IFELSE([AC_LANG_SOURCE([[
 #define _FILE_OFFSET_BITS 64
 #include <stdio.h>
 #include <fcntl.h>
@@ -203,8 +199,7 @@ int main(void)
 	unlink(tpl);
 	exit(WEXITSTATUS(status));
 }
-],
-rsync_cv_HAVE_BROKEN_LARGEFILE=yes,rsync_cv_HAVE_BROKEN_LARGEFILE=no,rsync_cv_HAVE_BROKEN_LARGEFILE=cross)])
+]])],[rsync_cv_HAVE_BROKEN_LARGEFILE=yes],[rsync_cv_HAVE_BROKEN_LARGEFILE=no],[rsync_cv_HAVE_BROKEN_LARGEFILE=cross])])
 if test x"$rsync_cv_HAVE_BROKEN_LARGEFILE" != x"yes"; then
    AC_SYS_LARGEFILE
 fi
@@ -214,8 +209,7 @@ ipv6lib=none
 ipv6trylibc=yes
 
 AC_ARG_ENABLE(ipv6,
-	AC_HELP_STRING([--disable-ipv6],
-		[do not even try to use IPv6]))
+	AS_HELP_STRING([--disable-ipv6],[do not even try to use IPv6]))
 if test x"$enable_ipv6" != x"no"; then
 	AC_MSG_CHECKING([ipv6 stack type])
 	for i in inria kame linux-glibc linux-inet6 solaris toshiba v6d zeta cygwin; do
@@ -326,8 +320,7 @@ fi
 
 dnl Do you want to disable use of locale functions
 AC_ARG_ENABLE([locale],
-	AC_HELP_STRING([--disable-locale],
-		[disable locale features]))
+	AS_HELP_STRING([--disable-locale],[disable locale features]))
 AH_TEMPLATE([CONFIG_LOCALE],
 [Undefine if you do not want locale features.  By default this is defined.])
 if test x"$enable_locale" != x"no"; then
@@ -358,7 +351,7 @@ AC_CHECK_HEADERS(sys/fcntl.h sys/select.h fcntl.h sys/time.h sys/unistd.h \
 AC_HEADER_MAJOR
 
 AC_CACHE_CHECK([if makedev takes 3 args],rsync_cv_MAKEDEV_TAKES_3_ARGS,[
-AC_TRY_RUN([
+AC_RUN_IFELSE([AC_LANG_SOURCE([[
 #include <sys/types.h>
 #ifdef MAJOR_IN_MKDEV
 #include <sys/mkdev.h>
@@ -376,8 +369,7 @@ int main(void)
 		exit(1);
 	return 0;
 }
-],
-rsync_cv_MAKEDEV_TAKES_3_ARGS=yes,rsync_cv_MAKEDEV_TAKES_3_ARGS=no,rsync_cv_MAKEDEV_TAKES_3_ARGS=no)])
+]])],[rsync_cv_MAKEDEV_TAKES_3_ARGS=yes],[rsync_cv_MAKEDEV_TAKES_3_ARGS=no],[rsync_cv_MAKEDEV_TAKES_3_ARGS=no])])
 if test x"$rsync_cv_MAKEDEV_TAKES_3_ARGS" = x"yes"; then
    AC_DEFINE(MAKEDEV_TAKES_3_ARGS, 1, [Define to 1 if makedev() takes 3 args])
 fi
@@ -396,9 +388,13 @@ AC_CHECK_SIZEOF(off64_t)
 AC_CHECK_SIZEOF(time_t)
 
 AC_C_INLINE
-AC_C_LONG_DOUBLE
 
-AC_TYPE_SIGNAL
+AC_TYPE_LONG_DOUBLE_WIDER
+ac_cv_c_long_double=$ac_cv_type_long_double_wider
+if test $ac_cv_c_long_double = yes; then
+  AC_DEFINE([HAVE_LONG_DOUBLE],[1],[Define to 1 if the type `long double' works and has more range or precision than `double'.])
+fi
+
 AC_TYPE_UID_T
 AC_CHECK_TYPES([mode_t,off_t,size_t,pid_t,id_t])
 AC_TYPE_GETGROUPS
@@ -418,8 +414,7 @@ AC_CHECK_MEMBERS([struct stat.st_rdev,
 TYPE_SOCKLEN_T
 
 AC_CACHE_CHECK([for errno in errno.h],rsync_cv_errno, [
-    AC_TRY_COMPILE([#include <errno.h>],[int i = errno],
-	rsync_cv_errno=yes,rsync_cv_have_errno_decl=no)])
+    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]], [[int i = errno]])],[rsync_cv_errno=yes],[rsync_cv_have_errno_decl=no])])
 if test x"$rsync_cv_errno" = x"yes"; then
    AC_DEFINE(HAVE_ERRNO_DECL, 1, [Define to 1 if errno is declared in errno.h])
 fi
@@ -470,7 +465,7 @@ AC_SEARCH_LIBS(libiconv_open, iconv)
 
 AC_MSG_CHECKING([for iconv declaration])
 AC_CACHE_VAL(am_cv_proto_iconv, [
-    AC_TRY_COMPILE([
+    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <stdlib.h>
 #include <iconv.h>
 extern
@@ -482,7 +477,7 @@ size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, si
 #else
 size_t iconv();
 #endif
-], [], am_cv_proto_iconv_arg1="", am_cv_proto_iconv_arg1="const")
+]], [[]])],[am_cv_proto_iconv_arg1=""],[am_cv_proto_iconv_arg1="const"])
       am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
     am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
 AC_MSG_RESULT([$]{ac_t:-
@@ -517,13 +512,11 @@ AS_IF([test x"$rsync_cv_HAVE_GETADDR_DEFINES" = x"yes" -a x"$ac_cv_type_struct_a
 	# redefinition.
 	AC_CHECK_FUNCS(getaddrinfo, ,
 		[AC_MSG_CHECKING([for getaddrinfo by including <netdb.h>])
-		AC_TRY_LINK([#include <sys/types.h>
+		AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
 		#include <sys/socket.h>
-		#include <netdb.h>],[getaddrinfo(NULL, NULL, NULL, NULL);],
-			[AC_MSG_RESULT([yes])
+		#include <netdb.h>]], [[getaddrinfo(NULL, NULL, NULL, NULL);]])],[AC_MSG_RESULT([yes])
 			AC_DEFINE(HAVE_GETADDRINFO, 1,
-				[Define to 1 if you have the "getaddrinfo" function and required types.])],
-			[AC_MSG_RESULT([no])
+				[Define to 1 if you have the "getaddrinfo" function and required types.])],[AC_MSG_RESULT([no])
 			AC_LIBOBJ([getaddrinfo])])])
     ],[AC_LIBOBJ([getaddrinfo])])
 
@@ -615,19 +608,15 @@ fi
 dnl Preallocation stuff (also fallocate, posix_fallocate function tests above):
 
 AC_CACHE_CHECK([for useable fallocate],rsync_cv_have_fallocate,[
-AC_TRY_LINK([#include <fcntl.h>
-#include <sys/types.h>],
-[fallocate(0, 0, 0, 0);],
-rsync_cv_have_fallocate=yes,rsync_cv_have_fallocate=no)])
+AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <fcntl.h>
+#include <sys/types.h>]], [[fallocate(0, 0, 0, 0);]])],[rsync_cv_have_fallocate=yes],[rsync_cv_have_fallocate=no])])
 if test x"$rsync_cv_have_fallocate" = x"yes"; then
     AC_DEFINE(HAVE_FALLOCATE, 1, [Define to 1 if you have the fallocate function and it compiles and links without error])
 fi
 
 AC_CACHE_CHECK([for SYS_fallocate],rsync_cv_have_sys_fallocate,[
-AC_TRY_COMPILE([#include <sys/syscall.h>
-#include <sys/types.h>],
-[syscall(SYS_fallocate, 0, 0, (loff_t)0, (loff_t)0);],
-rsync_cv_have_sys_fallocate=yes,rsync_cv_have_sys_fallocate=no)])
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/syscall.h>
+#include <sys/types.h>]], [[syscall(SYS_fallocate, 0, 0, (loff_t)0, (loff_t)0);]])],[rsync_cv_have_sys_fallocate=yes],[rsync_cv_have_sys_fallocate=no])])
 if test x"$rsync_cv_have_sys_fallocate" = x"yes"; then
     AC_DEFINE(HAVE_SYS_FALLOCATE, 1, [Define to 1 if you have the SYS_fallocate syscall number])
 fi
@@ -654,8 +643,7 @@ if test $ac_cv_func_getpgrp = yes; then
 fi
 
 AC_ARG_ENABLE(iconv-open,
-    AC_HELP_STRING([--disable-iconv-open],
-	    [disable all use of iconv_open() function]),
+    AS_HELP_STRING([--disable-iconv-open],[disable all use of iconv_open() function]),
     [], [enable_iconv_open=$ac_cv_func_iconv_open])
 
 if test x"$enable_iconv_open" != x"no"; then
@@ -663,8 +651,7 @@ if test x"$enable_iconv_open" != x"no"; then
 fi
 
 AC_ARG_ENABLE(iconv,
-    AC_HELP_STRING([--disable-iconv],
-	    [disable rsync's --iconv option]),
+    AS_HELP_STRING([--disable-iconv],[disable rsync's --iconv option]),
     [], [enable_iconv=$enable_iconv_open])
 AH_TEMPLATE([ICONV_OPTION],
 [Define if you want the --iconv option.  Specifing a value will set the
@@ -679,7 +666,7 @@ if test x"$enable_iconv" != x"no"; then
 fi
 
 AC_CACHE_CHECK([whether chown() modifies symlinks],rsync_cv_chown_modifies_symlink,[
-  AC_TRY_RUN([
+  AC_RUN_IFELSE([AC_LANG_SOURCE([[
 #if HAVE_UNISTD_H
 # include <unistd.h>
 #endif
@@ -691,14 +678,13 @@ AC_CACHE_CHECK([whether chown() modifies symlinks],rsync_cv_chown_modifies_symli
 	if (symlink("conftest.no-such", dangling_symlink) < 0) abort();
 	if (chown(dangling_symlink, getuid(), getgid()) < 0 && errno == ENOENT) exit(1);
 	exit(0);
-    }],
-  rsync_cv_chown_modifies_symlink=yes,rsync_cv_chown_modifies_symlink=no,rsync_cv_chown_modifies_symlink=no)])
+    }]])],[rsync_cv_chown_modifies_symlink=yes],[rsync_cv_chown_modifies_symlink=no],[rsync_cv_chown_modifies_symlink=no])])
 if test $rsync_cv_chown_modifies_symlink = yes; then
   AC_DEFINE(CHOWN_MODIFIES_SYMLINK, 1, [Define to 1 if chown modifies symlinks.])
 fi
 
 AC_CACHE_CHECK([whether link() can hard-link symlinks],rsync_cv_can_hardlink_symlink,[
-  AC_TRY_RUN([
+  AC_RUN_IFELSE([AC_LANG_SOURCE([[
 #if HAVE_UNISTD_H
 # include <unistd.h>
 #endif
@@ -711,14 +697,13 @@ AC_CACHE_CHECK([whether link() can hard-link symlinks],rsync_cv_can_hardlink_sym
 	unlink(FILENAME "2");
 	if (link(FILENAME, FILENAME "2") < 0) exit(1);
 	exit(0);
-    }],
-  rsync_cv_can_hardlink_symlink=yes,rsync_cv_can_hardlink_symlink=no,rsync_cv_can_hardlink_symlink=no)])
+    }]])],[rsync_cv_can_hardlink_symlink=yes],[rsync_cv_can_hardlink_symlink=no],[rsync_cv_can_hardlink_symlink=no])])
 if test $rsync_cv_can_hardlink_symlink = yes; then
   AC_DEFINE(CAN_HARDLINK_SYMLINK, 1, [Define to 1 if link() can hard-link symlinks.])
 fi
 
 AC_CACHE_CHECK([whether link() can hard-link special files],rsync_cv_can_hardlink_special,[
-  AC_TRY_RUN([
+  AC_RUN_IFELSE([AC_LANG_SOURCE([[
 #if HAVE_UNISTD_H
 # include <unistd.h>
 #endif
@@ -731,22 +716,20 @@ AC_CACHE_CHECK([whether link() can hard-link special files],rsync_cv_can_hardlin
 	unlink(FILENAME "2");
 	if (link(FILENAME, FILENAME "2") < 0) exit(1);
 	exit(0);
-    }],
-  rsync_cv_can_hardlink_special=yes,rsync_cv_can_hardlink_special=no,rsync_cv_can_hardlink_special=no)])
+    }]])],[rsync_cv_can_hardlink_special=yes],[rsync_cv_can_hardlink_special=no],[rsync_cv_can_hardlink_special=no])])
 if test $rsync_cv_can_hardlink_special = yes; then
     AC_DEFINE(CAN_HARDLINK_SPECIAL, 1, [Define to 1 if link() can hard-link special files.])
 fi
 
 AC_CACHE_CHECK([for working socketpair],rsync_cv_HAVE_SOCKETPAIR,[
-AC_TRY_RUN([
+AC_RUN_IFELSE([AC_LANG_SOURCE([[
 #include <sys/types.h>
 #include <sys/socket.h>
 
 main() {
        int fd[2];
        exit((socketpair(AF_UNIX, SOCK_STREAM, 0, fd) != -1) ? 0 : 1);
-}],
-rsync_cv_HAVE_SOCKETPAIR=yes,rsync_cv_HAVE_SOCKETPAIR=no,rsync_cv_HAVE_SOCKETPAIR=cross)])
+}]])],[rsync_cv_HAVE_SOCKETPAIR=yes],[rsync_cv_HAVE_SOCKETPAIR=no],[rsync_cv_HAVE_SOCKETPAIR=cross])])
 if test x"$rsync_cv_HAVE_SOCKETPAIR" = x"yes"; then
     AC_DEFINE(HAVE_SOCKETPAIR, 1, [Define to 1 if you have the "socketpair" function])
 fi
@@ -802,43 +785,37 @@ else
 fi
 
 AC_CACHE_CHECK([for unsigned char],rsync_cv_SIGNED_CHAR_OK,[
-AC_TRY_COMPILE([],[signed char *s = ""],
-rsync_cv_SIGNED_CHAR_OK=yes,rsync_cv_SIGNED_CHAR_OK=no)])
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[signed char *s = ""]])],[rsync_cv_SIGNED_CHAR_OK=yes],[rsync_cv_SIGNED_CHAR_OK=no])])
 if test x"$rsync_cv_SIGNED_CHAR_OK" = x"yes"; then
     AC_DEFINE(SIGNED_CHAR_OK, 1, [Define to 1 if "signed char" is a valid type])
 fi
 
 AC_CACHE_CHECK([for broken readdir],rsync_cv_HAVE_BROKEN_READDIR,[
-AC_TRY_RUN([#include <sys/types.h>
+AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <sys/types.h>
 #include <dirent.h>
 main() { struct dirent *di; DIR *d = opendir("."); di = readdir(d);
 if (di && di->d_name[-2] == '.' && di->d_name[-1] == 0 &&
-di->d_name[0] == 0) exit(0); exit(1);} ],
-rsync_cv_HAVE_BROKEN_READDIR=yes,rsync_cv_HAVE_BROKEN_READDIR=no,rsync_cv_HAVE_BROKEN_READDIR=cross)])
+di->d_name[0] == 0) exit(0); exit(1);} ]])],[rsync_cv_HAVE_BROKEN_READDIR=yes],[rsync_cv_HAVE_BROKEN_READDIR=no],[rsync_cv_HAVE_BROKEN_READDIR=cross])])
 if test x"$rsync_cv_HAVE_BROKEN_READDIR" = x"yes"; then
     AC_DEFINE(HAVE_BROKEN_READDIR, 1, [Define to 1 if readdir() is broken])
 fi
 
 AC_CACHE_CHECK([for utimbuf],rsync_cv_HAVE_STRUCT_UTIMBUF,[
-AC_TRY_COMPILE([#include <sys/types.h>
-#include <utime.h>],
-[struct utimbuf tbuf;  tbuf.actime = 0; tbuf.modtime = 1; exit(utime("foo.c",&tbuf));],
-rsync_cv_HAVE_STRUCT_UTIMBUF=yes,rsync_cv_HAVE_STRUCT_UTIMBUF=no)])
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
+#include <utime.h>]], [[struct utimbuf tbuf;  tbuf.actime = 0; tbuf.modtime = 1; exit(utime("foo.c",&tbuf));]])],[rsync_cv_HAVE_STRUCT_UTIMBUF=yes],[rsync_cv_HAVE_STRUCT_UTIMBUF=no])])
 if test x"$rsync_cv_HAVE_STRUCT_UTIMBUF" = x"yes"; then
     AC_DEFINE(HAVE_STRUCT_UTIMBUF, 1, [Define to 1 if you have the "struct utimbuf" type])
 fi
 
 AC_CACHE_CHECK([if gettimeofday takes tz argument],rsync_cv_HAVE_GETTIMEOFDAY_TZ,[
-AC_TRY_COMPILE([#include <sys/time.h>
-#include <unistd.h>],
-[struct timeval tv; exit(gettimeofday(&tv, NULL));],
-rsync_cv_HAVE_GETTIMEOFDAY_TZ=yes,rsync_cv_HAVE_GETTIMEOFDAY_TZ=no)])
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/time.h>
+#include <unistd.h>]], [[struct timeval tv; exit(gettimeofday(&tv, NULL));]])],[rsync_cv_HAVE_GETTIMEOFDAY_TZ=yes],[rsync_cv_HAVE_GETTIMEOFDAY_TZ=no])])
 if test x"$rsync_cv_HAVE_GETTIMEOFDAY_TZ" != x"no"; then
     AC_DEFINE(HAVE_GETTIMEOFDAY_TZ, 1, [Define to 1 if gettimeofday() takes a time-zone arg])
 fi
 
 AC_CACHE_CHECK([for C99 vsnprintf],rsync_cv_HAVE_C99_VSNPRINTF,[
-AC_TRY_RUN([
+AC_RUN_IFELSE([AC_LANG_SOURCE([[
 #include <sys/types.h>
 #include <stdarg.h>
 void foo(const char *format, ...) {
@@ -856,15 +833,14 @@ void foo(const char *format, ...) {
        exit(0);
 }
 main() { foo("hello"); }
-],
-rsync_cv_HAVE_C99_VSNPRINTF=yes,rsync_cv_HAVE_C99_VSNPRINTF=no,rsync_cv_HAVE_C99_VSNPRINTF=cross)])
+]])],[rsync_cv_HAVE_C99_VSNPRINTF=yes],[rsync_cv_HAVE_C99_VSNPRINTF=no],[rsync_cv_HAVE_C99_VSNPRINTF=cross])])
 if test x"$rsync_cv_HAVE_C99_VSNPRINTF" = x"yes"; then
     AC_DEFINE(HAVE_C99_VSNPRINTF, 1, [Define to 1 if vsprintf has a C99-compatible return value])
 fi
 
 
 AC_CACHE_CHECK([for secure mkstemp],rsync_cv_HAVE_SECURE_MKSTEMP,[
-AC_TRY_RUN([#include <stdlib.h>
+AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <stdlib.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <unistd.h>
@@ -877,10 +853,7 @@ main() {
   if (fstat(fd, &st) != 0) exit(1);
   if ((st.st_mode & 0777) != 0600) exit(1);
   exit(0);
-}],
-rsync_cv_HAVE_SECURE_MKSTEMP=yes,
-rsync_cv_HAVE_SECURE_MKSTEMP=no,
-rsync_cv_HAVE_SECURE_MKSTEMP=cross)])
+}]])],[rsync_cv_HAVE_SECURE_MKSTEMP=yes],[rsync_cv_HAVE_SECURE_MKSTEMP=no],[rsync_cv_HAVE_SECURE_MKSTEMP=cross])])
 if test x"$rsync_cv_HAVE_SECURE_MKSTEMP" = x"yes"; then
     case $host_os in
     hpux*)
@@ -897,29 +870,27 @@ fi
 
 
 AC_CACHE_CHECK([if mknod creates FIFOs],rsync_cv_MKNOD_CREATES_FIFOS,[
-AC_TRY_RUN([
+AC_RUN_IFELSE([AC_LANG_SOURCE([[
 #include <stdio.h>
 #include <sys/stat.h>
 #include <errno.h>
 main() { int rc, ec; char *fn = "fifo-test";
 unlink(fn); rc = mknod(fn,S_IFIFO,0600); ec = errno; unlink(fn);
 if (rc) {printf("(%d %d) ",rc,ec); return ec;}
-return 0;}],
-           rsync_cv_MKNOD_CREATES_FIFOS=yes,rsync_cv_MKNOD_CREATES_FIFOS=no,rsync_cv_MKNOD_CREATES_FIFOS=cross)])
+return 0;}]])],[rsync_cv_MKNOD_CREATES_FIFOS=yes],[rsync_cv_MKNOD_CREATES_FIFOS=no],[rsync_cv_MKNOD_CREATES_FIFOS=cross])])
 if test x"$rsync_cv_MKNOD_CREATES_FIFOS" = x"yes"; then
     AC_DEFINE(MKNOD_CREATES_FIFOS, 1, [Define to 1 if mknod() can create FIFOs.])
 fi
 
 AC_CACHE_CHECK([if mknod creates sockets],rsync_cv_MKNOD_CREATES_SOCKETS,[
-AC_TRY_RUN([
+AC_RUN_IFELSE([AC_LANG_SOURCE([[
 #include <stdio.h>
 #include <sys/stat.h>
 #include <errno.h>
 main() { int rc, ec; char *fn = "sock-test";
 unlink(fn); rc = mknod(fn,S_IFSOCK,0600); ec = errno; unlink(fn);
 if (rc) {printf("(%d %d) ",rc,ec); return ec;}
-return 0;}],
-           rsync_cv_MKNOD_CREATES_SOCKETS=yes,rsync_cv_MKNOD_CREATES_SOCKETS=no,rsync_cv_MKNOD_CREATES_SOCKETS=cross)])
+return 0;}]])],[rsync_cv_MKNOD_CREATES_SOCKETS=yes],[rsync_cv_MKNOD_CREATES_SOCKETS=no],[rsync_cv_MKNOD_CREATES_SOCKETS=cross])])
 if test x"$rsync_cv_MKNOD_CREATES_SOCKETS" = x"yes"; then
     AC_DEFINE(MKNOD_CREATES_SOCKETS, 1, [Define to 1 if mknod() can create sockets.])
 fi
@@ -966,8 +937,7 @@ AC_CHECK_FUNCS(_acl __acl _facl __facl)
 
 AC_MSG_CHECKING([whether to support ACLs])
 AC_ARG_ENABLE(acl-support,
-	AC_HELP_STRING([--disable-acl-support],
-		       [disable ACL support]))
+	AS_HELP_STRING([--disable-acl-support],[disable ACL support]))
 
 if test x"$enable_acl_support" = x"no"; then
     AC_MSG_RESULT(no)
@@ -1013,20 +983,16 @@ else
 	AC_MSG_RESULT(running tests:)
 	AC_CHECK_LIB(acl,acl_get_file)
 	AC_CACHE_CHECK([for ACL support],samba_cv_HAVE_POSIX_ACLS,[
-	    AC_TRY_LINK([#include <sys/types.h>
-#include <sys/acl.h>],
-[ acl_t acl; int entry_id; acl_entry_t *entry_p; return acl_get_entry( acl, entry_id, entry_p);],
-samba_cv_HAVE_POSIX_ACLS=yes,samba_cv_HAVE_POSIX_ACLS=no)])
+	    AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
+#include <sys/acl.h>]], [[ acl_t acl; int entry_id; acl_entry_t *entry_p; return acl_get_entry( acl, entry_id, entry_p);]])],[samba_cv_HAVE_POSIX_ACLS=yes],[samba_cv_HAVE_POSIX_ACLS=no])])
 	AC_MSG_CHECKING(ACL test results)
 	if test x"$samba_cv_HAVE_POSIX_ACLS" = x"yes"; then
 	    AC_MSG_RESULT(Using posix ACLs)
 	    AC_DEFINE(HAVE_POSIX_ACLS, 1, [true if you have posix ACLs])
 	    AC_DEFINE(SUPPORT_ACLS, 1)
 	    AC_CACHE_CHECK([for acl_get_perm_np],samba_cv_HAVE_ACL_GET_PERM_NP,[
-		AC_TRY_LINK([#include <sys/types.h>
-#include <sys/acl.h>],
-[ acl_permset_t permset_d; acl_perm_t perm; return acl_get_perm_np( permset_d, perm);],
-samba_cv_HAVE_ACL_GET_PERM_NP=yes,samba_cv_HAVE_ACL_GET_PERM_NP=no)])
+		AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
+#include <sys/acl.h>]], [[ acl_permset_t permset_d; acl_perm_t perm; return acl_get_perm_np( permset_d, perm);]])],[samba_cv_HAVE_ACL_GET_PERM_NP=yes],[samba_cv_HAVE_ACL_GET_PERM_NP=no])])
 	    if test x"$samba_cv_HAVE_ACL_GET_PERM_NP" = x"yes"; then
 		AC_DEFINE(HAVE_ACL_GET_PERM_NP, 1, [true if you have acl_get_perm_np])
 	    fi
@@ -1045,8 +1011,7 @@ fi
 # check for extended attribute support
 AC_MSG_CHECKING(whether to support extended attributes)
 AC_ARG_ENABLE(xattr-support,
-    AC_HELP_STRING([--disable-xattr-support],
-	    [disable extended attributes]),
+    AS_HELP_STRING([--disable-xattr-support],[disable extended attributes]),
     [], [case "$ac_cv_func_getxattr$ac_cv_func_extattr_get_link$ac_cv_func_attropen" in
 	*yes*) enable_xattr_support=maybe ;;
 	*) enable_xattr_support=no ;;
@@ -1096,7 +1061,7 @@ if test x"$enable_acl_support" = x"no" -o x"$enable_xattr_support" = x"no" -o x"
     AC_MSG_CHECKING([whether $CC supports -Wno-unused-parameter])
     OLD_CFLAGS="$CFLAGS"
     CFLAGS="$CFLAGS -Wno-unused-parameter"
-    AC_TRY_LINK([#include <stdio.h>], [printf("hello\n");], [rsync_warn_flag=yes], [rsync_warn_flag=no])
+    AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>]], [[printf("hello\n");]])],[rsync_warn_flag=yes],[rsync_warn_flag=no])
     AC_MSG_RESULT([$rsync_warn_flag])
     if test x"$rsync_warn_flag" = x"no"; then
 	CFLAGS="$OLD_CFLAGS"

main.c

@@ -1411,12 +1411,12 @@ static int start_client(int argc, char *argv[])
 }
 
 
-static RETSIGTYPE sigusr1_handler(UNUSED(int val))
+static void sigusr1_handler(UNUSED(int val))
 {
 	exit_cleanup(RERR_SIGNAL1);
 }
 
-static RETSIGTYPE sigusr2_handler(UNUSED(int val))
+static void sigusr2_handler(UNUSED(int val))
 {
 	if (!am_server)
 		output_summary();
@@ -1426,7 +1426,7 @@ static RETSIGTYPE sigusr2_handler(UNUSED(int val))
 	_exit(0);
 }
 
-RETSIGTYPE remember_children(UNUSED(int val))
+void remember_children(UNUSED(int val))
 {
 #ifdef WNOHANG
 	int cnt, status;
@@ -1487,7 +1487,7 @@ const char *get_panic_action(void)
  * should just look at the environment variable, but I'm a bit leery
  * of a signal sending us into a busy loop.
  **/
-static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig))
+static void rsync_panic_handler(UNUSED(int whatsig))
 {
 	char cmd_buf[300];
 	int ret, pid_int = getpid();

packaging/nightly-rsync

@@ -59,7 +59,7 @@ if ($make_tar) {
     my $confversion;
     open(IN, '<', 'configure.ac') or die "Unable to open configure.ac: $!\n";
     while (<IN>) {
-	if (/^AC_INIT\(\[rsync\],\s+\[(\d.+?)\]/) {
+	if (/^AC_INIT\(\[rsync\],\s*\[(\d.+?)\]/) {
 	    $confversion = $1;
 	    last;
 	}

packaging/release-rsync

@@ -67,7 +67,7 @@ check_git_state($master_branch, 1, 1);
 my $confversion;
 open(IN, '<', 'configure.ac') or die $!;
 while (<IN>) {
-    if (/^AC_INIT\(\[rsync\],\s+\[(\d.+?)\]/) {
+    if (/^AC_INIT\(\[rsync\],\s*\[(\d.+?)\]/) {
 	$confversion = $1;
 	last;
     }
@@ -202,7 +202,7 @@ foreach my $fn (@tweak_files) {
     undef $/; $_ = <IN>; $/ = "\n";
     close IN;
     if ($fn =~ /configure/) {
-	s/^(AC_INIT\(\[rsync\],\s+\[)\d.+?(\])/$1$version$2/m
+	s/^(AC_INIT\(\[rsync\],\s*\[)\d.+?(\])/$1$version$2/m
 	    or die "Unable to update AC_INIT with version in $fn\n";
     } elsif ($fn =~ /\.spec/) {
 	while (my($str, $val) = each %specvars) {

rsync.c

@@ -605,7 +605,7 @@ int set_file_attrs(const char *fname, struct file_struct *file, stat_x *sxp,
 }
 
 /* This is only called for SIGINT, SIGHUP, and SIGTERM. */
-RETSIGTYPE sig_int(int sig_num)
+void sig_int(int sig_num)
 {
 	/* KLUGE: if the user hits Ctrl-C while ssh is prompting
 	 * for a password, then our cleanup's sending of a SIGUSR1

socket.c

@@ -161,7 +161,7 @@ int try_bind_local(int s, int ai_family, int ai_socktype,
 }
 
 /* connect() timeout handler based on alarm() */
-static RETSIGTYPE contimeout_handler(UNUSED(int val))
+static void contimeout_handler(UNUSED(int val))
 {
 	connect_timeout = -1;
 }
@@ -529,7 +529,7 @@ int is_a_socket(int fd)
 }
 
 
-static RETSIGTYPE sigchld_handler(UNUSED(int val))
+static void sigchld_handler(UNUSED(int val))
 {
 #ifdef WNOHANG
 	while (waitpid(-1, NULL, WNOHANG) > 0) {}