* configure.in (SYNC_INPUT): Use OPTION_DEFAULT_ON and AC_DEFINE

rather than change CPPFLAGS.
(HAVE_GTK): Rename to USE_GTK.
* Makefile.in: Don't use HAVE_GTK and don't -DUSE_GTK since it's now
done in config.h.

6 files changed, 543 insertions, 288 deletions

diff --git a/ChangeLog b/ChangeLog
index 9833ddd7751..72dda4f96be 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2008-04-16  Stefan Monnier  <monnier@iro.umontreal.ca>
+
+        * configure.in (SYNC_INPUT): Use OPTION_DEFAULT_ON and AC_DEFINE
+        rather than change CPPFLAGS.
+        (HAVE_GTK): Rename to USE_GTK.
+
 2008-04-16  Yavor Doganov  <yavor@gnu.org>  (tiny change)
 
         * configure.in: Replace the obsolete macros AC_AIX and
diff --git a/configure b/configure
index 52da306ad4a..745eb22ce7c 100755
--- a/configure
+++ b/configure
@@ -577,7 +577,6 @@ PACKAGE_STRING='emacs 23.0.60'
 PACKAGE_BUGREPORT=''
 
 ac_unique_file="src/lisp.h"
-ac_config_libobj_dir=src
 # Factoring default headers for most tests.
 ac_includes_default="\
 #include <stdio.h>
@@ -614,6 +613,7 @@ ac_includes_default="\
 # include <unistd.h>
 #endif"
 
+ac_config_libobj_dir=src
 ac_header_list=
 ac_func_list=
 ac_subst_vars='SHELL
@@ -1333,7 +1333,6 @@ Optional Features:
                           specify install directory for Emacs.app on Mac OS X
                           [DIR=/Application]
   --disable-font-backend  don't compile font-backend support
-  --disable-sync-input    don't compile code with sync-input
   --enable-asserts        compile code with asserts enabled
   --enable-maintainer-mode
                           enable make rules and dependencies not useful (and
@@ -1351,6 +1350,7 @@ Optional Packages:
   --with-kerberos5        support Kerberos version 5 authenticated POP
   --with-hesiod           support Hesiod to get the POP server host
   --without-sound         don't compile with sound support
+  --without-sync-input    Process async input synchronously
   --with-x-toolkit=KIT    use an X toolkit (KIT one of: yes, lucid, athena,
                           motif, gtk, no)
   --without-xpm           don't compile with XPM image support
@@ -1932,6 +1932,22 @@ fi
 
 
 
+# Check whether --with-sync-input was given.
+if test "${with_sync_input+set}" = set; then
+  withval=$with_sync_input;
+else
+     with_sync_input=yes
+fi
+
+if test "$with_sync_input" = yes; then
+
+cat >>confdefs.h <<\_ACEOF
+#define SYNC_INPUT 1
+_ACEOF
+
+fi
+
+
 # Check whether --with-x-toolkit was given.
 if test "${with_x_toolkit+set}" = set; then
   withval=$with_x_toolkit;        case "${withval}" in
@@ -2137,15 +2153,6 @@ else
 fi
 
 
-## Enabled by default.
-# Check whether --enable-sync-input was given.
-if test "${enable_sync_input+set}" = set; then
-  enableval=$enable_sync_input; USE_SYNC_INPUT=$enableval
-else
-  USE_SYNC_INPUT=yes
-fi
-
-
 # Check whether --enable-asserts was given.
 if test "${enable_asserts+set}" = set; then
   enableval=$enable_asserts; USE_XASSERTS=$enableval
@@ -3902,6 +3909,12 @@ then
   CC="$CC $NON_GCC_TEST_OPTIONS"
 fi
 
+
+cat >>confdefs.h <<\_ACEOF
+#define _GNU_SOURCE 1
+_ACEOF
+
+
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
@@ -4324,9 +4337,471 @@ fi
 rm -f conftest*
 
 
+{ echo "$as_me:$LINENO: checking for ANSI C header files" >&5
+echo $ECHO_N "checking for ANSI C header files... $ECHO_C" >&6; }
+if test "${ac_cv_header_stdc+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <float.h>
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_compile") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+         test -z "$ac_c_werror_flag" ||
+         test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then
+  ac_cv_header_stdc=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+        ac_cv_header_stdc=no
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
+if test $ac_cv_header_stdc = yes; then
+  # SunOS 4.x string.h does not declare mem*, contrary to ANSI.
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <string.h>
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "memchr" >/dev/null 2>&1; then
+  :
+else
+  ac_cv_header_stdc=no
+fi
+rm -f conftest*
+
+fi
+
+if test $ac_cv_header_stdc = yes; then
+  # ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI.
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <stdlib.h>
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "free" >/dev/null 2>&1; then
+  :
+else
+  ac_cv_header_stdc=no
+fi
+rm -f conftest*
+
+fi
+
+if test $ac_cv_header_stdc = yes; then
+  # /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi.
+  if test "$cross_compiling" = yes; then
+  :
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <ctype.h>
+#include <stdlib.h>
+#if ((' ' & 0x0FF) == 0x020)
+# define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
+# define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
+#else
+# define ISLOWER(c) \
+                   (('a' <= (c) && (c) <= 'i') \
+                     || ('j' <= (c) && (c) <= 'r') \
+                     || ('s' <= (c) && (c) <= 'z'))
+# define TOUPPER(c) (ISLOWER(c) ? ((c) | 0x40) : (c))
+#endif
+
+#define XOR(e, f) (((e) && !(f)) || (!(e) && (f)))
+int
+main ()
+{
+  int i;
+  for (i = 0; i < 256; i++)
+    if (XOR (islower (i), ISLOWER (i))
+        || toupper (i) != TOUPPER (i))
+      return 2;
+  return 0;
+}
+_ACEOF
+rm -f conftest$ac_exeext
+if { (ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_link") 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && { ac_try='./conftest$ac_exeext'
+  { (case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_try") 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  :
+else
+  echo "$as_me: program exited with status $ac_status" >&5
+echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+( exit $ac_status )
+ac_cv_header_stdc=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext
+fi
+
+
+fi
+fi
+{ echo "$as_me:$LINENO: result: $ac_cv_header_stdc" >&5
+echo "${ECHO_T}$ac_cv_header_stdc" >&6; }
+if test $ac_cv_header_stdc = yes; then
 
 cat >>confdefs.h <<\_ACEOF
-#define _GNU_SOURCE 1
+#define STDC_HEADERS 1
+_ACEOF
+
+fi
+
+# On IRIX 5.3, sys/types and inttypes.h are conflicting.
+
+
+
+
+
+
+
+
+
+for ac_header in sys/types.h sys/stat.h stdlib.h string.h memory.h strings.h \
+                  inttypes.h stdint.h unistd.h
+do
+as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh`
+{ echo "$as_me:$LINENO: checking for $ac_header" >&5
+echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6; }
+if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+$ac_includes_default
+
+#include <$ac_header>
+_ACEOF
+rm -f conftest.$ac_objext
+if { (ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_compile") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+         test -z "$ac_c_werror_flag" ||
+         test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then
+  eval "$as_ac_Header=yes"
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+        eval "$as_ac_Header=no"
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+ac_res=`eval echo '${'$as_ac_Header'}'`
+               { echo "$as_me:$LINENO: result: $ac_res" >&5
+echo "${ECHO_T}$ac_res" >&6; }
+if test `eval echo '${'$as_ac_Header'}'` = yes; then
+  cat >>confdefs.h <<_ACEOF
+#define `echo "HAVE_$ac_header" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+
+done
+
+
+if test "${ac_cv_header_minix_config_h+set}" = set; then
+  { echo "$as_me:$LINENO: checking for minix/config.h" >&5
+echo $ECHO_N "checking for minix/config.h... $ECHO_C" >&6; }
+if test "${ac_cv_header_minix_config_h+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+fi
+{ echo "$as_me:$LINENO: result: $ac_cv_header_minix_config_h" >&5
+echo "${ECHO_T}$ac_cv_header_minix_config_h" >&6; }
+else
+  # Is the header compilable?
+{ echo "$as_me:$LINENO: checking minix/config.h usability" >&5
+echo $ECHO_N "checking minix/config.h usability... $ECHO_C" >&6; }
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+$ac_includes_default
+#include <minix/config.h>
+_ACEOF
+rm -f conftest.$ac_objext
+if { (ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_compile") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+         test -z "$ac_c_werror_flag" ||
+         test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then
+  ac_header_compiler=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+        ac_header_compiler=no
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+{ echo "$as_me:$LINENO: result: $ac_header_compiler" >&5
+echo "${ECHO_T}$ac_header_compiler" >&6; }
+
+# Is the header present?
+{ echo "$as_me:$LINENO: checking minix/config.h presence" >&5
+echo $ECHO_N "checking minix/config.h presence... $ECHO_C" >&6; }
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <minix/config.h>
+_ACEOF
+if { (ac_try="$ac_cpp conftest.$ac_ext"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_cpp conftest.$ac_ext") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } >/dev/null && {
+         test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" ||
+         test ! -s conftest.err
+       }; then
+  ac_header_preproc=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+  ac_header_preproc=no
+fi
+
+rm -f conftest.err conftest.$ac_ext
+{ echo "$as_me:$LINENO: result: $ac_header_preproc" >&5
+echo "${ECHO_T}$ac_header_preproc" >&6; }
+
+# So?  What about this header?
+case $ac_header_compiler:$ac_header_preproc:$ac_c_preproc_warn_flag in
+  yes:no: )
+    { echo "$as_me:$LINENO: WARNING: minix/config.h: accepted by the compiler, rejected by the preprocessor!" >&5
+echo "$as_me: WARNING: minix/config.h: accepted by the compiler, rejected by the preprocessor!" >&2;}
+    { echo "$as_me:$LINENO: WARNING: minix/config.h: proceeding with the compiler's result" >&5
+echo "$as_me: WARNING: minix/config.h: proceeding with the compiler's result" >&2;}
+    ac_header_preproc=yes
+    ;;
+  no:yes:* )
+    { echo "$as_me:$LINENO: WARNING: minix/config.h: present but cannot be compiled" >&5
+echo "$as_me: WARNING: minix/config.h: present but cannot be compiled" >&2;}
+    { echo "$as_me:$LINENO: WARNING: minix/config.h:     check for missing prerequisite headers?" >&5
+echo "$as_me: WARNING: minix/config.h:     check for missing prerequisite headers?" >&2;}
+    { echo "$as_me:$LINENO: WARNING: minix/config.h: see the Autoconf documentation" >&5
+echo "$as_me: WARNING: minix/config.h: see the Autoconf documentation" >&2;}
+    { echo "$as_me:$LINENO: WARNING: minix/config.h:     section \"Present But Cannot Be Compiled\"" >&5
+echo "$as_me: WARNING: minix/config.h:     section \"Present But Cannot Be Compiled\"" >&2;}
+    { echo "$as_me:$LINENO: WARNING: minix/config.h: proceeding with the preprocessor's result" >&5
+echo "$as_me: WARNING: minix/config.h: proceeding with the preprocessor's result" >&2;}
+    { echo "$as_me:$LINENO: WARNING: minix/config.h: in the future, the compiler will take precedence" >&5
+echo "$as_me: WARNING: minix/config.h: in the future, the compiler will take precedence" >&2;}
+
+    ;;
+esac
+{ echo "$as_me:$LINENO: checking for minix/config.h" >&5
+echo $ECHO_N "checking for minix/config.h... $ECHO_C" >&6; }
+if test "${ac_cv_header_minix_config_h+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_cv_header_minix_config_h=$ac_header_preproc
+fi
+{ echo "$as_me:$LINENO: result: $ac_cv_header_minix_config_h" >&5
+echo "${ECHO_T}$ac_cv_header_minix_config_h" >&6; }
+
+fi
+if test $ac_cv_header_minix_config_h = yes; then
+  MINIX=yes
+else
+  MINIX=
+fi
+
+
+if test "$MINIX" = yes; then
+
+cat >>confdefs.h <<\_ACEOF
+#define _POSIX_SOURCE 1
+_ACEOF
+
+
+cat >>confdefs.h <<\_ACEOF
+#define _POSIX_1_SOURCE 2
+_ACEOF
+
+
+cat >>confdefs.h <<\_ACEOF
+#define _MINIX 1
+_ACEOF
+
+fi
+
+
+
+
+
+
+
+
+
+
+
+  { echo "$as_me:$LINENO: checking whether it is safe to define __EXTENSIONS__" >&5
+echo $ECHO_N "checking whether it is safe to define __EXTENSIONS__... $ECHO_C" >&6; }
+if test "${ac_cv_safe_to_define___extensions__+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+#         define __EXTENSIONS__ 1
+          $ac_includes_default
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_compile") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+         test -z "$ac_c_werror_flag" ||
+         test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then
+  ac_cv_safe_to_define___extensions__=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+        ac_cv_safe_to_define___extensions__=no
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+{ echo "$as_me:$LINENO: result: $ac_cv_safe_to_define___extensions__" >&5
+echo "${ECHO_T}$ac_cv_safe_to_define___extensions__" >&6; }
+  test $ac_cv_safe_to_define___extensions__ = yes &&
+    cat >>confdefs.h <<\_ACEOF
+#define __EXTENSIONS__ 1
+_ACEOF
+
+  cat >>confdefs.h <<\_ACEOF
+#define _POSIX_PTHREAD_SEMANTICS 1
+_ACEOF
+
+  cat >>confdefs.h <<\_ACEOF
+#define _TANDEM_SOURCE 1
 _ACEOF
 
 
@@ -5597,249 +6072,6 @@ esac
 
 if test "${with_sound}" != "no"; then
   # Sound support for GNU/Linux and the free BSDs.
-  { echo "$as_me:$LINENO: checking for ANSI C header files" >&5
-echo $ECHO_N "checking for ANSI C header files... $ECHO_C" >&6; }
-if test "${ac_cv_header_stdc+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-#include <stdlib.h>
-#include <stdarg.h>
-#include <string.h>
-#include <float.h>
-
-int
-main ()
-{
-
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-         test -z "$ac_c_werror_flag" ||
-         test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
-  ac_cv_header_stdc=yes
-else
-  echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-        ac_cv_header_stdc=no
-fi
-
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-
-if test $ac_cv_header_stdc = yes; then
-  # SunOS 4.x string.h does not declare mem*, contrary to ANSI.
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-#include <string.h>
-
-_ACEOF
-if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
-  $EGREP "memchr" >/dev/null 2>&1; then
-  :
-else
-  ac_cv_header_stdc=no
-fi
-rm -f conftest*
-
-fi
-
-if test $ac_cv_header_stdc = yes; then
-  # ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI.
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-#include <stdlib.h>
-
-_ACEOF
-if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
-  $EGREP "free" >/dev/null 2>&1; then
-  :
-else
-  ac_cv_header_stdc=no
-fi
-rm -f conftest*
-
-fi
-
-if test $ac_cv_header_stdc = yes; then
-  # /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi.
-  if test "$cross_compiling" = yes; then
-  :
-else
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-#include <ctype.h>
-#include <stdlib.h>
-#if ((' ' & 0x0FF) == 0x020)
-# define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
-# define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
-#else
-# define ISLOWER(c) \
-                   (('a' <= (c) && (c) <= 'i') \
-                     || ('j' <= (c) && (c) <= 'r') \
-                     || ('s' <= (c) && (c) <= 'z'))
-# define TOUPPER(c) (ISLOWER(c) ? ((c) | 0x40) : (c))
-#endif
-
-#define XOR(e, f) (((e) && !(f)) || (!(e) && (f)))
-int
-main ()
-{
-  int i;
-  for (i = 0; i < 256; i++)
-    if (XOR (islower (i), ISLOWER (i))
-        || toupper (i) != TOUPPER (i))
-      return 2;
-  return 0;
-}
-_ACEOF
-rm -f conftest$ac_exeext
-if { (ac_try="$ac_link"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
-  (eval "$ac_link") 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && { ac_try='./conftest$ac_exeext'
-  { (case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
-  (eval "$ac_try") 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  :
-else
-  echo "$as_me: program exited with status $ac_status" >&5
-echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-( exit $ac_status )
-ac_cv_header_stdc=no
-fi
-rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext
-fi
-
-
-fi
-fi
-{ echo "$as_me:$LINENO: result: $ac_cv_header_stdc" >&5
-echo "${ECHO_T}$ac_cv_header_stdc" >&6; }
-if test $ac_cv_header_stdc = yes; then
-
-cat >>confdefs.h <<\_ACEOF
-#define STDC_HEADERS 1
-_ACEOF
-
-fi
-
-# On IRIX 5.3, sys/types and inttypes.h are conflicting.
-
-
-
-
-
-
-
-
-
-for ac_header in sys/types.h sys/stat.h stdlib.h string.h memory.h strings.h \
-                  inttypes.h stdint.h unistd.h
-do
-as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh`
-{ echo "$as_me:$LINENO: checking for $ac_header" >&5
-echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6; }
-if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-$ac_includes_default
-
-#include <$ac_header>
-_ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-         test -z "$ac_c_werror_flag" ||
-         test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
-  eval "$as_ac_Header=yes"
-else
-  echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-        eval "$as_ac_Header=no"
-fi
-
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-ac_res=`eval echo '${'$as_ac_Header'}'`
-               { echo "$as_me:$LINENO: result: $ac_res" >&5
-echo "${ECHO_T}$ac_res" >&6; }
-if test `eval echo '${'$as_ac_Header'}'` = yes; then
-  cat >>confdefs.h <<_ACEOF
-#define `echo "HAVE_$ac_header" | $as_tr_cpp` 1
-_ACEOF
-
-fi
-
-done
-
-
 
 
 
@@ -10999,7 +11231,7 @@ echo "$as_me: error: Gtk+ wanted, but it does not compile, see config.log.  Mayb
     HAVE_GTK=yes
 
 cat >>confdefs.h <<\_ACEOF
-#define HAVE_GTK 1
+#define USE_GTK 1
 _ACEOF
 
     USE_X_TOOLKIT=none
@@ -18588,11 +18820,13 @@ _ACEOF
 cat confdefs.h >>conftest.$ac_ext
 cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
-#include <stdio.h>
+#include <sys/types.h> /* for off_t */
+     #include <stdio.h>
 int
 main ()
 {
-return fseeko (stdin, 0, 0) && (fseeko) (stdin, 0, 0);
+int (*fp) (FILE *, off_t, int) = fseeko;
+     return fseeko (stdin, 0, 0) && fp (stdin, 0, 0);
   ;
   return 0;
 }
@@ -18632,11 +18866,13 @@ cat confdefs.h >>conftest.$ac_ext
 cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
 #define _LARGEFILE_SOURCE 1
-#include <stdio.h>
+#include <sys/types.h> /* for off_t */
+     #include <stdio.h>
 int
 main ()
 {
-return fseeko (stdin, 0, 0) && (fseeko) (stdin, 0, 0);
+int (*fp) (FILE *, off_t, int) = fseeko;
+     return fseeko (stdin, 0, 0) && fp (stdin, 0, 0);
   ;
   return 0;
 }
@@ -23918,11 +24154,6 @@ if test $USE_XASSERTS = yes; then
    CPPFLAGS="$CPPFLAGS -DXASSERTS=1"
 fi
 
-if test $USE_SYNC_INPUT = yes; then
-   echo "  Compiling with sync input."
-   CPPFLAGS="$CPPFLAGS -DSYNC_INPUT=1"
-fi
-
 echo
 
 if test "$USE_X_TOOLKIT" = GTK; then
diff --git a/configure.in b/configure.in
index c6a0f059c00..31523db9d5c 100644
--- a/configure.in
+++ b/configure.in
@@ -99,6 +99,11 @@ fi
 
 OPTION_DEFAULT_ON([sound],[don't compile with sound support])
 
+OPTION_DEFAULT_ON([sync-input],[Process async input synchronously])
+if test "$with_sync_input" = yes; then
+   AC_DEFINE(SYNC_INPUT, 1, [Process async input synchronously.])
+fi
+
 dnl FIXME currently it is not the last.
 dnl This should be the last --with option, because --with-x is
 dnl added later on when we find the path of X, and it's best to
@@ -173,12 +178,6 @@ AC_ARG_ENABLE(font-backend,
       USE_FONT_BACKEND=$enableval,
       USE_FONT_BACKEND=yes)
 
-## Enabled by default.
-AC_ARG_ENABLE(sync-input,
-[AS_HELP_STRING([--disable-sync-input], [don't compile code with sync-input])],
-      USE_SYNC_INPUT=$enableval,
-      USE_SYNC_INPUT=yes)
-
 AC_ARG_ENABLE(asserts,
 [AS_HELP_STRING([--enable-asserts], [compile code with asserts enabled])],
       USE_XASSERTS=$enableval,
@@ -1670,7 +1669,7 @@ if test x"$pkg_check_gtk" = xyes; then
     fi
   else
     HAVE_GTK=yes
-    AC_DEFINE(HAVE_GTK, 1, [Define to 1 if using GTK.])
+    AC_DEFINE(USE_GTK, 1, [Define to 1 if using GTK.])
     USE_X_TOOLKIT=none
     if $PKG_CONFIG --atleast-version=2.10 gtk+-2.0; then
       :
@@ -3008,11 +3007,6 @@ if test $USE_XASSERTS = yes; then
    CPPFLAGS="$CPPFLAGS -DXASSERTS=1"
 fi
 
-if test $USE_SYNC_INPUT = yes; then
-   echo "  Compiling with sync input."
-   CPPFLAGS="$CPPFLAGS -DSYNC_INPUT=1"
-fi
-
 echo
 
 if test "$USE_X_TOOLKIT" = GTK; then
diff --git a/src/ChangeLog b/src/ChangeLog
index b814ed3e57f..dd0d8cd266f 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,8 @@
+2008-04-16  Stefan Monnier  <monnier@iro.umontreal.ca>
+
+        * Makefile.in: Don't use HAVE_GTK and don't -DUSE_GTK since it's now
+        done in config.h.
+
 2008-04-16  Juanma Barranquero  <lekktu@gmail.com>
 
         * character.c (Fchar_bytes, Fchar_width, Fstring_width)
diff --git a/src/Makefile.in b/src/Makefile.in
index 4ed0b19ed5f..8566848a434 100644
--- a/src/Makefile.in
+++ b/src/Makefile.in
@@ -240,11 +240,6 @@ STARTFILES = START_FILES
 #endif /* not ORDINARY_LINK */
 
 
-#if HAVE_GTK
-#define USE_GTK
-TOOLKIT_DEFINES = -DUSE_GTK
-#endif
-
 #ifdef USE_X_TOOLKIT
 #define USE_@X_TOOLKIT_TYPE@
 TOOLKIT_DEFINES = -DUSE_@X_TOOLKIT_TYPE@
@@ -980,7 +975,7 @@ temacs${EXEEXT}: $(LOCALCPP) $(STARTFILES) stamp-oldxmenu ${obj} ${otherobj} OBJ
 prefix-args${EXEEXT}: prefix-args.c $(config_h)
         $(CC) $(ALL_CFLAGS) $(LDFLAGS) ${srcdir}/prefix-args.c -o prefix-args
 
-#if defined (HAVE_X_WINDOWS) && defined (HAVE_X11) && defined (HAVE_MENUS) && ! defined (HAVE_GTK)
+#if defined (HAVE_X_WINDOWS) && defined (HAVE_X11) && defined (HAVE_MENUS) && ! defined (USE_GTK)
 
 /* We use stamp-xmenu with these two deps
    to both ensure that lwlib gets remade based on its dependencies
@@ -1029,12 +1024,12 @@ really-oldXMenu:
         @true  /* make -t should not create really-oldXMenu.  */
 .PHONY: really-oldXMenu
 #endif /* not USE_X_TOOLKIT */
-#else /* not (HAVE_X_WINDOWS && HAVE_X11 && HAVE_MENUS && ! HAVE_GTK) */
+#else /* not (HAVE_X_WINDOWS && HAVE_X11 && HAVE_MENUS && ! USE_GTK) */
 
 /* We don''t really need this, but satisfy the dependency.  */
 stamp-oldxmenu:
         touch stamp-oldxmenu
-#endif /* not (HAVE_X_WINDOWS && HAVE_X11 && HAVE_MENUS && ! HAVE_GTK) */
+#endif /* not (HAVE_X_WINDOWS && HAVE_X11 && HAVE_MENUS && ! USE_GTK) */
 
 ../config.status:: epaths.in
         @echo "The file epaths.h needs to be set up from epaths.in."
diff --git a/src/config.in b/src/config.in
index 83e58b0a401..b3fefc18853 100644
--- a/src/config.in
+++ b/src/config.in
@@ -244,9 +244,6 @@ Boston, MA 02110-1301, USA.  */
 /* Define to 1 if you have the `grantpt' function. */
 #undef HAVE_GRANTPT
 
-/* Define to 1 if using GTK. */
-#undef HAVE_GTK
-
 /* Define to 1 if you have GTK and pthread (-lpthread). */
 #undef HAVE_GTK_AND_PTHREAD
 
@@ -837,6 +834,9 @@ Boston, MA 02110-1301, USA.  */
 /* Define to 1 on System V Release 4. */
 #undef SVR4
 
+/* Process async input synchronously. */
+#undef SYNC_INPUT
+
 /* Define to 1 if you can safely include both <sys/time.h> and <time.h>. */
 #undef TIME_WITH_SYS_TIME
 
@@ -856,6 +856,9 @@ Boston, MA 02110-1301, USA.  */
 /* Define to 1 if we should use font-backend. */
 #undef USE_FONT_BACKEND
 
+/* Define to 1 if using GTK. */
+#undef USE_GTK
+
 /* Define to 1 if we should use toolkit scroll bars. */
 #undef USE_TOOLKIT_SCROLL_BARS
 
@@ -890,6 +893,27 @@ Boston, MA 02110-1301, USA.  */
 /* Define for large files, on AIX-style hosts. */
 #undef _LARGE_FILES
 
+/* Define to 1 if on MINIX. */
+#undef _MINIX
+
+/* Define to 2 if the system does not provide POSIX.1 features except with
+   this defined. */
+#undef _POSIX_1_SOURCE
+
+/* Define to 1 if you need to in order for `stat' and other things to work. */
+#undef _POSIX_SOURCE
+
+/* Enable extensions on Solaris.  */
+#ifndef __EXTENSIONS__
+# undef __EXTENSIONS__
+#endif
+#ifndef _POSIX_PTHREAD_SEMANTICS
+# undef _POSIX_PTHREAD_SEMANTICS
+#endif
+#ifndef _TANDEM_SOURCE
+# undef _TANDEM_SOURCE
+#endif
+
 /* Define to rpl_ if the getopt replacement functions and variables should be
    used. */
 #undef __GETOPT_PREFIX