Rearrange some configure.in comments for better readability.

Commit configure and pg_config.h.in, missed in last configure.in
update.

configure

@@ -2713,12 +2713,14 @@ else
   fi
 fi
 
-# The Intel compiler on Linux supports most gcc options, but not
-# all of them, so only add these options if we are really using
-# gcc.
+# Some versions of GCC support some additional useful warning flags.
+# Check whether they are supported, and add them to CFLAGS if so.
 
 if test "$GCC" = yes; then
 
+# ICC pretends to be GCC but it's lying; it doesn't support these options.
+# So we have to check if "GCC" is really ICC.
+
 cat >conftest.$ac_ext <<_ACEOF
 /* confdefs.h.  */
 _ACEOF
@@ -2766,11 +2768,10 @@ sed 's/^/| /' conftest.$ac_ext >&5
 ICC=no
 fi
 rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
+
   if test "$ICC" = no; then
     CFLAGS="$CFLAGS -Wall -Wmissing-prototypes -Wpointer-arith -Winline"
 
-    # Some versions of GCC support some additional useful warning flags.
-    # Check whether they are supported, and add them to CFLAGS if so.
     echo "$as_me:$LINENO: checking if $CC supports -Wdeclaration-after-statement" >&5
 echo $ECHO_N "checking if $CC supports -Wdeclaration-after-statement... $ECHO_C" >&6
 pgac_save_CFLAGS=$CFLAGS
@@ -21621,14 +21622,15 @@ esac
 
 
 # Select semaphore implementation type.
-if test x"$USE_NAMED_POSIX_SEMAPHORES" = x"1" ; then
+if test "$PORTNAME" != "win32"; then
+  if test x"$USE_NAMED_POSIX_SEMAPHORES" = x"1" ; then
 
 cat >>confdefs.h <<\_ACEOF
 #define USE_NAMED_POSIX_SEMAPHORES 1
 _ACEOF
 
     SEMA_IMPLEMENTATION="src/backend/port/posix_sema.c"
-else
+  else
     if test x"$USE_UNNAMED_POSIX_SEMAPHORES" = x"1" ; then
 
 cat >>confdefs.h <<\_ACEOF
@@ -21644,6 +21646,14 @@ _ACEOF
 
       SEMA_IMPLEMENTATION="src/backend/port/sysv_sema.c"
     fi
+  fi
+else
+
+cat >>confdefs.h <<\_ACEOF
+#define USE_WIN32_SEMAPHORES 1
+_ACEOF
+
+  SEMA_IMPLEMENTATION="src/backend/port/win32_sema.c"
 fi
 
 

configure.in

 dnl Process this file with autoconf to produce a configure script.
-dnl $PostgreSQL: pgsql/configure.in,v 1.463 2006/04/29 16:34:41 momjian Exp $
+dnl $PostgreSQL: pgsql/configure.in,v 1.464 2006/04/29 20:47:29 tgl Exp $
 dnl
 dnl Developers, please strive to achieve this order:
 dnl
@@ -248,19 +248,20 @@ else
   fi
 fi
 
-# The Intel compiler on Linux supports most gcc options, but not
-# all of them, so only add these options if we are really using
-# gcc.
+# Some versions of GCC support some additional useful warning flags.
+# Check whether they are supported, and add them to CFLAGS if so.
 
 if test "$GCC" = yes; then
+
+# ICC pretends to be GCC but it's lying; it doesn't support these options.
+# So we have to check if "GCC" is really ICC.
 AC_TRY_COMPILE([], [@%:@ifndef __INTEL_COMPILER
 choke me
 @%:@endif], [ICC=[yes]], [ICC=[no]])
+
   if test "$ICC" = no; then
     CFLAGS="$CFLAGS -Wall -Wmissing-prototypes -Wpointer-arith -Winline"
 
-    # Some versions of GCC support some additional useful warning flags.
-    # Check whether they are supported, and add them to CFLAGS if so.
     PGAC_PROG_CC_CFLAGS_OPT([-Wdeclaration-after-statement])
     PGAC_PROG_CC_CFLAGS_OPT([-Wendif-labels])
   else

src/include/pg_config.h.in

@@ -129,7 +129,7 @@
 /* Define to 1 if your compiler understands __FUNCTION__. */
 #undef HAVE_FUNCNAME__FUNCTION
 
-/* Define to 1 if you have getaddrinfo(). */
+/* Define to 1 if you have the `getaddrinfo' function. */
 #undef HAVE_GETADDRINFO
 
 /* Define to 1 if you have the `gethostbyname_r' function. */
@@ -625,6 +625,9 @@
 /* Define to select unnamed POSIX semaphores. */
 #undef USE_UNNAMED_POSIX_SEMAPHORES
 
+/* Define to select Win32-style semaphores. */
+#undef USE_WIN32_SEMAPHORES
+
 /* Number of bits in a file offset, on hosts where this is settable. */
 #undef _FILE_OFFSET_BITS