* libc/include/sys/features.h (__GNUC_PREREQ): Define. Use

	throughout in place of explicit GNUC version checks.
	* libc/include/_ansi.h (_NOINLINE): Define.
	(_NOINLINE_STATIC): Define.
	* libc/stdio/vfprintf.c (__sbprintf): Define _NOINLINE_STATIC.

9 files changed, 33 insertions, 19 deletions

diff --git a/newlib/libc/include/_ansi.h b/newlib/libc/include/_ansi.h
index 86cb82b..c5597b3 100644
--- a/newlib/libc/include/_ansi.h
+++ b/newlib/libc/include/_ansi.h
@@ -34,9 +34,7 @@
 #define _BEGIN_STD_C extern "C" {
 #define _END_STD_C  }
 #endif
-#if defined(__GNUC__) && \
-  ( (__GNUC__ >= 4) || \
-    ( (__GNUC__ >= 3) && defined(__GNUC_MINOR__) && (__GNUC_MINOR__ >= 3) ) )
+#if __GNUC_PREREQ (3, 3)
 #define _NOTHROW __attribute__ ((nothrow))
 #else
 #define _NOTHROW throw()
@@ -133,4 +131,14 @@
 #define _ELIDABLE_INLINE static __inline__
 #endif
 
+#if __GNUC_PREREQ (3, 1)
+#define _NOINLINE		__attribute__ ((__noinline__))
+#define _NOINLINE_STATIC	_NOINLINE static
+#else
+/* On non-GNU compilers and GCC prior to version 3.1 the compiler can't be
+   trusted not to inline if it is static. */
+#define _NOINLINE
+#define _NOINLINE_STATIC
+#endif
+
 #endif /* _ANSIDECL_H_ */
diff --git a/newlib/libc/include/machine/_default_types.h b/newlib/libc/include/machine/_default_types.h
index e79f993..362e079 100644
--- a/newlib/libc/include/machine/_default_types.h
+++ b/newlib/libc/include/machine/_default_types.h
@@ -12,8 +12,7 @@ extern "C" {
 /*
  * Guess on types by examining *_MIN / *_MAX defines.
  */
-#if defined(__GNUC__) && ((__GNUC__ >= 4) || (__GNUC__ >= 3 ) \
-  && defined(__GNUC_MINOR__) && (__GNUC_MINOR__ > 2 ))
+#if __GNUC_PREREQ (3, 3)
 /* GCC >= 3.3.0 has __<val>__ implicitly defined. */
 #define __EXP(x) __##x##__
 #else
diff --git a/newlib/libc/include/math.h b/newlib/libc/include/math.h
index 9e60414..e9328c5 100644
--- a/newlib/libc/include/math.h
+++ b/newlib/libc/include/math.h
@@ -34,10 +34,7 @@ union __ldmath
 /* Natural log of 2 */
 #define _M_LN2        0.693147180559945309417
 
-#if defined(__GNUC__) && \
-  ( (__GNUC__ >= 4) || \
-    ( (__GNUC__ >= 3) && defined(__GNUC_MINOR__) && (__GNUC_MINOR__ >= 3) ) )
-
+#if __GNUC_PREREQ (3, 3)
  /* gcc >= 3.3 implicitly defines builtins for HUGE_VALx values.  */
 
 # ifndef HUGE_VAL
diff --git a/newlib/libc/include/stdint.h b/newlib/libc/include/stdint.h
index 94759e9..d0374ae 100644
--- a/newlib/libc/include/stdint.h
+++ b/newlib/libc/include/stdint.h
@@ -9,13 +9,13 @@
 #ifndef _STDINT_H
 #define _STDINT_H
 
+#include <_ansi.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-#if defined(__GNUC__) && \
-  ( (__GNUC__ >= 4) || \
-    ( (__GNUC__ >= 3) && defined(__GNUC_MINOR__) && (__GNUC_MINOR__ > 2) ) )
+#if __GNUC_PREREQ (3, 2)
 /* gcc > 3.2 implicitly defines the values we are interested */
 #define __STDINT_EXP(x) __##x##__
 #else
diff --git a/newlib/libc/include/sys/features.h b/newlib/libc/include/sys/features.h
index e7f9c65..f150706 100644
--- a/newlib/libc/include/sys/features.h
+++ b/newlib/libc/include/sys/features.h
@@ -25,6 +25,16 @@
 extern "C" {
 #endif
 
+/* Macro to test version of GCC.  Returns 0 for non-GCC or too old GCC. */
+#ifndef __GNUC_PREREQ
+# if defined __GNUC__ && defined __GNUC_MINOR__
+#  define __GNUC_PREREQ(maj, min) \
+	((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
+# else
+#  define __GNUC_PREREQ(maj, min) 0
+# endif
+#endif /* __GNUC_PREREQ */
+
 /* RTEMS adheres to POSIX -- 1003.1b with some features from annexes.  */
 
 #ifdef __rtems__
diff --git a/newlib/libc/include/tgmath.h b/newlib/libc/include/tgmath.h
index 52fb886..f9c8311 100644
--- a/newlib/libc/include/tgmath.h
+++ b/newlib/libc/include/tgmath.h
@@ -58,8 +58,7 @@
  */
 
 /* requires GCC >= 3.1 */
-#if !defined(__GNUC__) || __GNUC__ < 3 || \
-	(__GNUC__ == 3 && __GNUC_MINOR__ < 1)
+#if !__GNUC_PREREQ (3, 1)
 #error "<tgmath.h> not implemented for this compiler"
 #endif
 
diff --git a/newlib/libc/posix/engine.c b/newlib/libc/posix/engine.c
index 73ce45c..c80834a 100644
--- a/newlib/libc/posix/engine.c
+++ b/newlib/libc/posix/engine.c
@@ -34,6 +34,7 @@
  */
 
 #include <sys/cdefs.h>
+#include <_ansi.h>
 
 /*
  * The matching engine and friends.  This file is #included by regexec.c
@@ -364,8 +365,7 @@ sopno stopst;
 	char *ssp;		/* start of string matched by subsubRE */
 	char *sep;		/* end of string matched by subsubRE */
 	char *oldssp;		/* previous ssp */
-#if defined (__GNUC__) && \
-    ((__GNUC__ == 4 && __GNUC_MINOR__ >= 6) || __GNUC__ > 4)
+#if __GNUC_PREREQ (4, 6)
 /* dp is only used for assertion testing which, for some reason, is not
    recognized as usage. */
 #pragma GCC diagnostic ignored "-Wunused-but-set-variable"
diff --git a/newlib/libc/stdio/vfprintf.c b/newlib/libc/stdio/vfprintf.c
index 4b165e0..6dfa9c8 100644
--- a/newlib/libc/stdio/vfprintf.c
+++ b/newlib/libc/stdio/vfprintf.c
@@ -333,8 +333,10 @@ int __sprint_r (struct _reent *, FILE *, register struct __suio *);
  * Helper function for `fprintf to unbuffered unix file': creates a
  * temporary buffer.  We only work on write-only files; this avoids
  * worries about ungetc buffers and so forth.
+ *
+ * Make sure to avoid inlining when optimizing for size.
  */
-static int
+_NOINLINE_STATIC int
 _DEFUN(__sbprintf, (rptr, fp, fmt, ap),
        struct _reent *rptr _AND
        register FILE *fp   _AND
diff --git a/newlib/libc/string/strcasestr.c b/newlib/libc/string/strcasestr.c
index 9178316..1bde1cd 100644
--- a/newlib/libc/string/strcasestr.c
+++ b/newlib/libc/string/strcasestr.c
@@ -84,8 +84,7 @@ QUICKREF
   (!memchr ((h) + (h_l), '\0', (j) + (n_l) - (h_l))	\
    && ((h_l) = (j) + (n_l)))
 # define CANON_ELEMENT(c) tolower (c)
-#if defined (__GNUC__) && \
-    ((__GNUC__ == 4 && __GNUC_MINOR__ >= 2) || __GNUC__ > 4)
+#if __GNUC_PREREQ (4, 2)
 /* strncasecmp uses signed char, CMP_FUNC is expected to use unsigned char. */
 #pragma GCC diagnostic ignored "-Wpointer-sign"
 #endif