diff --git a/config/c-compiler.m4 b/config/c-compiler.m4
index eeb2ee949425d2406db79a3259f8fb0ae943975f..550f831a58342039fb08797a265ebff928ebe67f 100644
--- a/config/c-compiler.m4
+++ b/config/c-compiler.m4
@@ -1,5 +1,5 @@
 # Macros to detect C compiler features
-# $PostgreSQL: pgsql/config/c-compiler.m4,v 1.19 2008/06/27 00:36:16 tgl Exp $
+# $PostgreSQL: pgsql/config/c-compiler.m4,v 1.20 2010/02/13 02:34:08 tgl Exp $
 
 
 # PGAC_C_SIGNED
@@ -17,6 +17,30 @@ fi])# PGAC_C_SIGNED
 
 
 
+# PGAC_C_INLINE
+# -------------
+# Check if the C compiler understands inline functions.
+# Defines: inline, USE_INLINE
+AC_DEFUN([PGAC_C_INLINE],
+[AC_C_INLINE
+AC_CACHE_CHECK([for quiet inline (no complaint if unreferenced)], pgac_cv_c_inline_quietly,
+  [pgac_cv_c_inline_quietly=no
+  if test "$ac_cv_c_inline" != no; then
+    pgac_c_inline_save_werror=$ac_c_werror_flag
+    ac_c_werror_flag=yes
+    AC_LINK_IFELSE([AC_LANG_PROGRAM([static inline int fun () {return 0;}],[])],
+                   [pgac_cv_c_inline_quietly=yes])
+    ac_c_werror_flag=$pgac_c_inline_save_werror
+  fi])
+if test "$pgac_cv_c_inline_quietly" != no; then
+  AC_DEFINE_UNQUOTED([USE_INLINE], 1,
+    [Define to 1 if "static inline" works without unwanted warnings from ]
+    [compilations where static inline functions are defined but not called.])
+fi
+])# PGAC_C_INLINE
+
+
+
 # PGAC_TYPE_64BIT_INT(TYPE)
 # -------------------------
 # Check if TYPE is a working 64 bit integer type. Set HAVE_TYPE_64 to
diff --git a/configure b/configure
index 62999b4ec3a714da610f7d47e4fce09f6a13332b..c0ca7bc45744dddb8e44c47a48a1ba4672da4dc8 100755
--- a/configure
+++ b/configure
@@ -14535,6 +14535,75 @@ _ACEOF
     ;;
 esac
 
+{ $as_echo "$as_me:$LINENO: checking for quiet inline (no complaint if unreferenced)" >&5
+$as_echo_n "checking for quiet inline (no complaint if unreferenced)... " >&6; }
+if test "${pgac_cv_c_inline_quietly+set}" = set; then
+  $as_echo_n "(cached) " >&6
+else
+  pgac_cv_c_inline_quietly=no
+  if test "$ac_cv_c_inline" != no; then
+    pgac_c_inline_save_werror=$ac_c_werror_flag
+    ac_c_werror_flag=yes
+    cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+static inline int fun () {return 0;}
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
+$as_echo "$ac_try_echo") >&5
+  (eval "$ac_link") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest$ac_exeext && {
+	 test "$cross_compiling" = yes ||
+	 $as_test_x conftest$ac_exeext
+       }; then
+  pgac_cv_c_inline_quietly=yes
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+
+fi
+
+rm -rf conftest.dSYM
+rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
+      conftest$ac_exeext conftest.$ac_ext
+    ac_c_werror_flag=$pgac_c_inline_save_werror
+  fi
+fi
+{ $as_echo "$as_me:$LINENO: result: $pgac_cv_c_inline_quietly" >&5
+$as_echo "$pgac_cv_c_inline_quietly" >&6; }
+if test "$pgac_cv_c_inline_quietly" != no; then
+
+cat >>confdefs.h <<_ACEOF
+#define USE_INLINE 1
+_ACEOF
+
+fi
+
 { $as_echo "$as_me:$LINENO: checking for preprocessor stringizing operator" >&5
 $as_echo_n "checking for preprocessor stringizing operator... " >&6; }
 if test "${ac_cv_c_stringize+set}" = set; then
diff --git a/configure.in b/configure.in
index 4f24399375d2b8f185704d19b9a5140119791b8a..6955edbea0480bfe1a9da6445381fe3d407ec0e9 100644
--- a/configure.in
+++ b/configure.in
@@ -1,5 +1,5 @@
 dnl Process this file with autoconf to produce a configure script.
-dnl $PostgreSQL: pgsql/configure.in,v 1.621 2010/01/16 19:50:26 tgl Exp $
+dnl $PostgreSQL: pgsql/configure.in,v 1.622 2010/02/13 02:34:11 tgl Exp $
 dnl
 dnl Developers, please strive to achieve this order:
 dnl
@@ -1087,7 +1087,7 @@ fi
 m4_defun([AC_PROG_CC_STDC], []) dnl We don't want that.
 AC_C_BIGENDIAN
 AC_C_CONST
-AC_C_INLINE
+PGAC_C_INLINE
 AC_C_STRINGIZE
 PGAC_C_SIGNED
 AC_C_VOLATILE
diff --git a/src/backend/nodes/list.c b/src/backend/nodes/list.c
index 9968b1ef1569739ff180c331bba06206440b1590..24fcffd22ff24583778827e6903af5e5b2acafde 100644
--- a/src/backend/nodes/list.c
+++ b/src/backend/nodes/list.c
@@ -9,7 +9,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/nodes/list.c,v 1.73 2010/01/02 16:57:46 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/nodes/list.c,v 1.74 2010/02/13 02:34:11 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -1224,12 +1224,10 @@ list_copy_tail(List *oldlist, int nskip)
 }
 
 /*
- * When using non-GCC compilers, we can't define these as inline
- * functions in pg_list.h, so they are defined here.
- *
- * TODO: investigate supporting inlining for some non-GCC compilers.
+ * pg_list.h defines inline versions of these functions if allowed by the
+ * compiler; in which case the definitions below are skipped.
  */
-#ifndef __GNUC__
+#ifndef USE_INLINE
 
 ListCell *
 list_head(List *l)
@@ -1248,7 +1246,7 @@ list_length(List *l)
 {
 	return l ? l->length : 0;
 }
-#endif   /* ! __GNUC__ */
+#endif   /* ! USE_INLINE */
 
 /*
  * Temporary compatibility functions
diff --git a/src/backend/utils/mmgr/mcxt.c b/src/backend/utils/mmgr/mcxt.c
index bb4c0e69e565e268a2bd43619f549c4b2310ec0d..6d31e4e075f169797be8a7bab6b008f4c809c31b 100644
--- a/src/backend/utils/mmgr/mcxt.c
+++ b/src/backend/utils/mmgr/mcxt.c
@@ -14,7 +14,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/mmgr/mcxt.c,v 1.68 2010/01/02 16:57:58 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/mmgr/mcxt.c,v 1.69 2010/02/13 02:34:12 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -628,11 +628,10 @@ repalloc(void *pointer, Size size)
  * MemoryContextSwitchTo
  *		Returns the current context; installs the given context.
  *
- * This is inlined when using GCC.
- *
- * TODO: investigate supporting inlining for some non-GCC compilers.
+ * palloc.h defines an inline version of this function if allowed by the
+ * compiler; in which case the definition below is skipped.
  */
-#ifndef __GNUC__
+#ifndef USE_INLINE
 
 MemoryContext
 MemoryContextSwitchTo(MemoryContext context)
@@ -645,7 +644,7 @@ MemoryContextSwitchTo(MemoryContext context)
 	CurrentMemoryContext = context;
 	return old;
 }
-#endif   /* ! __GNUC__ */
+#endif   /* ! USE_INLINE */
 
 /*
  * MemoryContextStrdup
diff --git a/src/include/nodes/pg_list.h b/src/include/nodes/pg_list.h
index c9340c9af92f6d0db00c7f0ad429be88a85359d7..fae567969ab3f11219e0fc948950c3f5f72992c4 100644
--- a/src/include/nodes/pg_list.h
+++ b/src/include/nodes/pg_list.h
@@ -30,7 +30,7 @@
  * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/nodes/pg_list.h,v 1.62 2010/01/02 16:58:04 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/nodes/pg_list.h,v 1.63 2010/02/13 02:34:13 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -71,24 +71,24 @@ struct ListCell
 /*
  * These routines are used frequently. However, we can't implement
  * them as macros, since we want to avoid double-evaluation of macro
- * arguments. Therefore, we implement them using GCC inline functions,
- * and as regular functions with non-GCC compilers.
+ * arguments. Therefore, we implement them using static inline functions
+ * if supported by the compiler, or as regular functions otherwise.
  */
-#ifdef __GNUC__
+#ifdef USE_INLINE
 
-static __inline__ ListCell *
+static inline ListCell *
 list_head(List *l)
 {
 	return l ? l->head : NULL;
 }
 
-static __inline__ ListCell *
+static inline ListCell *
 list_tail(List *l)
 {
 	return l ? l->tail : NULL;
 }
 
-static __inline__ int
+static inline int
 list_length(List *l)
 {
 	return l ? l->length : 0;
@@ -98,7 +98,7 @@ list_length(List *l)
 extern ListCell *list_head(List *l);
 extern ListCell *list_tail(List *l);
 extern int	list_length(List *l);
-#endif   /* __GNUC__ */
+#endif   /* USE_INLINE */
 
 /*
  * NB: There is an unfortunate legacy from a previous incarnation of
diff --git a/src/include/pg_config.h.in b/src/include/pg_config.h.in
index 69799a50424f381ee32da78f28fc1dfff3f30624..684aed4a9f43a7ddf92273c7218cfbe6c502bed6 100644
--- a/src/include/pg_config.h.in
+++ b/src/include/pg_config.h.in
@@ -749,6 +749,10 @@
    (--enable-float8-byval) */
 #undef USE_FLOAT8_BYVAL
 
+/* Define to 1 if "static inline" works without unwanted warnings from
+   compilations where static inline functions are defined but not called. */
+#undef USE_INLINE
+
 /* Define to 1 if you want 64-bit integer timestamp and interval support.
    (--enable-integer-datetimes) */
 #undef USE_INTEGER_DATETIMES
diff --git a/src/include/pg_config.h.win32 b/src/include/pg_config.h.win32
index 76f37310209a6170be3b1e7400c78e13617f4fef..de97bcfab12c15c44ff7cd4c5f1e72f76445691d 100644
--- a/src/include/pg_config.h.win32
+++ b/src/include/pg_config.h.win32
@@ -6,8 +6,8 @@
  *
  * HAVE_CBRT, HAVE_FUNCNAME_FUNC, HAVE_GETOPT, HAVE_GETOPT_H,
  * HAVE_GETOPT_LONG, HAVE_RINT, HAVE_STRINGS_H, HAVE_STRTOLL,
- * HAVE_STRTOULL, HAVE_STRUCT_OPTION, ENABLE_THREAD_SAFETY
- *
+ * HAVE_STRTOULL, HAVE_STRUCT_OPTION, ENABLE_THREAD_SAFETY,
+ * USE_INLINE, inline
  */
 
 /* Define to the type of arg 1 of 'accept' */
@@ -621,6 +621,10 @@
 /* Define to 1 to build with Bonjour support. (--with-bonjour) */
 /* #undef USE_BONJOUR */
 
+/* Define to 1 if "static inline" works without unwanted warnings from
+   compilations where static inline functions are defined but not called. */
+#define USE_INLINE 1
+
 /* Define to 1 if you want 64-bit integer timestamp and interval support.
    (--enable-integer-datetimes) */
 /* #undef USE_INTEGER_DATETIMES */
@@ -664,9 +668,11 @@
 /* Define to empty if `const' does not conform to ANSI C. */
 /* #undef const */
 
-/* Define as `__inline' if that's what the C compiler calls it, or to nothing
-   if it is not supported. */
-/* #undef inline */
+/* Define to `__inline__' or `__inline' if that's what the C compiler
+   calls it, or to nothing if 'inline' is not supported under any name.  */
+#ifndef __cplusplus
+#define inline __inline
+#endif
 
 /* Define to empty if the C compiler does not understand signed types. */
 /* #undef signed */
diff --git a/src/include/port/win32.h b/src/include/port/win32.h
index ae784c2dcb8841c4adeebfa31f49f592ae27dbb3..3ec81c4f7edf99162cfaedb6b227b654a3d1d064 100644
--- a/src/include/port/win32.h
+++ b/src/include/port/win32.h
@@ -1,4 +1,4 @@
-/* $PostgreSQL: pgsql/src/include/port/win32.h,v 1.91 2010/01/02 22:47:37 mha Exp $ */
+/* $PostgreSQL: pgsql/src/include/port/win32.h,v 1.92 2010/02/13 02:34:14 tgl Exp $ */
 
 #if defined(_MSC_VER) || defined(__BORLANDC__)
 #define WIN32_ONLY_COMPILER
@@ -313,15 +313,6 @@ typedef __int64 ssize_t;
 typedef unsigned short mode_t;
 #endif
 
-/*
- *	Certain "standard edition" versions of MSVC throw a warning
- *	that later generates an error for "inline" statements, but
- *	__inline seems to work.  e.g.  Microsoft Visual C++ .NET
- *	Version 7.1.3088
- */
-#define inline __inline
-#define __inline__ __inline
-
 #ifndef __BORLANDC__
 #define _S_IRWXU	(_S_IREAD | _S_IWRITE | _S_IEXEC)
 #define _S_IXUSR	_S_IEXEC
diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index 6ba50bdf059a19f37dba68b1dd246e95ed9d1ccb..8515189bca701f2f4734c44103fd52b0aea4fae3 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -45,7 +45,7 @@
  *
  * Copyright (c) 2001-2010, PostgreSQL Global Development Group
  *
- * $PostgreSQL: pgsql/src/include/portability/instr_time.h,v 1.5 2010/01/02 16:58:08 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/portability/instr_time.h,v 1.6 2010/02/13 02:34:15 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -141,7 +141,7 @@ typedef LARGE_INTEGER instr_time;
 #define INSTR_TIME_GET_MICROSEC(t) \
 	((uint64) (((double) (t).QuadPart * 1000000.0) / GetTimerFrequency()))
 
-static __inline__ double
+static inline double
 GetTimerFrequency(void)
 {
 	LARGE_INTEGER f;
diff --git a/src/include/utils/palloc.h b/src/include/utils/palloc.h
index a885e263d1b766c462fcb8e478c6f7522e4a0eb5..af59c3ce54df3ea7ece49c1de259a1a73f16d738 100644
--- a/src/include/utils/palloc.h
+++ b/src/include/utils/palloc.h
@@ -21,7 +21,7 @@
  * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/utils/palloc.h,v 1.42 2010/01/02 16:58:10 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/utils/palloc.h,v 1.43 2010/02/13 02:34:16 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -72,11 +72,11 @@ extern void *repalloc(void *pointer, Size size);
 
 /*
  * MemoryContextSwitchTo can't be a macro in standard C compilers.
- * But we can make it an inline function when using GCC.
+ * But we can make it an inline function if the compiler supports it.
  */
-#ifdef __GNUC__
+#ifdef USE_INLINE
 
-static __inline__ MemoryContext
+static inline MemoryContext
 MemoryContextSwitchTo(MemoryContext context)
 {
 	MemoryContext old = CurrentMemoryContext;
@@ -87,7 +87,7 @@ MemoryContextSwitchTo(MemoryContext context)
 #else
 
 extern MemoryContext MemoryContextSwitchTo(MemoryContext context);
-#endif   /* __GNUC__ */
+#endif   /* USE_INLINE */
 
 /*
  * These are like standard strdup() except the copied string is