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Subject[2.6 patch] add compiler-gcc4.h
On Sat, Feb 05, 2005 at 11:52:00AM -0800, H. Peter Anvin wrote:
> Adrian Bunk wrote:
> >
> >It doesn't seem to be logical for everyone whether compiler-gcc+.h or
> >compiler-gcc3.h is used for gcc 4.0 ...
> >
> >Perhaps compiler-gcc+.h (which wasn't always updated when
> >compiler-gcc3.h was updated) should be removed?
> >
>
> That would make more sense. After all, gcc5+ can use the gcc4 file
> until a gcc5 file proper is created.

The compiler-gcc*.h files check only for __GNUC_MINOR__ but not for
__GNUC__ .

Is the patch below OK?

> -hpa

cu
Adrian


<-- snip -->

With the release of gcc 4.0 being only a few months away and people
already tring compiling with it, it's time for adding a compiler-gcc4.h .

This patch contains the following changes:
- remove compiler-gcc+.h
- compiler-gcc4.h: new file based on a corrected compiler-gcc+.h
- compiler.h: include compiler-gcc4.h for gcc 4
- compiler.h: #error for gcc > 4
- compiler-gcc3.h: remove __compiler_offsetof (there will never be a
gcc 3.5)
small indention corrections
I've tested the compilation with both gcc 3.4.4 and a recent gcc 4.0
snapshot from Debian experimental.

Signed-off-by: Adrian Bunk <bunk@stusta.de>

---
include/linux/compiler-gcc+.h | 3 +++
include/linux/compiler-gcc3.h | 10 ++++------
include/linux/compiler-gcc4.h | 16 ++++++++++++++++
include/linux/compiler.h | 6 ++++--
4 files changed, 27 insertions(+), 8 deletions(-)
--- linux-2.6.11-rc2-mm2-full/include/linux/compiler.h.old 2005-01-30 09:59:28.000000000 +0100
+++ linux-2.6.11-rc2-mm2-full/include/linux/compiler.h 2005-01-30 10:00:15.000000000 +0100
@@ -34,8 +34,10 @@

#ifdef __KERNEL__

-#if __GNUC__ > 3
-# include <linux/compiler-gcc+.h> /* catch-all for GCC 4, 5, etc. */
+#if __GNUC__ > 4
+#error no compiler-gcc.h file for this gcc version
+#elif __GNUC__ == 4
+# include <linux/compiler-gcc4.h>
#elif __GNUC__ == 3
# include <linux/compiler-gcc3.h>
#elif __GNUC__ == 2
--- linux-2.6.11-rc2-mm2-full/include/linux/compiler-gcc3.h.old 2005-01-30 10:05:16.000000000 +0100
+++ linux-2.6.11-rc2-mm2-full/include/linux/compiler-gcc3.h 2005-01-30 10:08:38.000000000 +0100
@@ -10,7 +10,7 @@
#endif

#if __GNUC_MINOR__ > 0
-# define __deprecated __attribute__((deprecated))
+# define __deprecated __attribute__((deprecated))
#endif

#if __GNUC_MINOR__ >= 3
@@ -23,12 +23,10 @@
#define __attribute_const__ __attribute__((__const__))

#if __GNUC_MINOR__ >= 1
-#define noinline __attribute__((noinline))
+#define noinline __attribute__((noinline))
#endif
+
#if __GNUC_MINOR__ >= 4
-#define __must_check __attribute__((warn_unused_result))
+#define __must_check __attribute__((warn_unused_result))
#endif

-#if __GNUC_MINOR__ >= 5
-#define __compiler_offsetof(a,b) __builtin_offsetof(a,b)
-#endif
--- /dev/null 2004-11-25 03:16:25.000000000 +0100
+++ linux-2.6.11-rc2-mm2-full/include/linux/compiler-gcc4.h 2005-01-30 10:09:08.000000000 +0100
@@ -0,0 +1,16 @@
+/* Never include this file directly. Include <linux/compiler.h> instead. */
+
+/* These definitions are for GCC v4.x. */
+#include <linux/compiler-gcc.h>
+
+#define inline inline __attribute__((always_inline))
+#define __inline__ __inline__ __attribute__((always_inline))
+#define __inline __inline __attribute__((always_inline))
+#define __deprecated __attribute__((deprecated))
+#define __attribute_used__ __attribute__((__used__))
+#define __attribute_pure__ __attribute__((pure))
+#define __attribute_const__ __attribute__((__const__))
+#define noinline __attribute__((noinline))
+#define __must_check __attribute__((warn_unused_result))
+#define __compiler_offsetof(a,b) __builtin_offsetof(a,b)
+
--- linux-2.6.11-rc3-mm1-full/include/linux/compiler-gcc+.h 2004-12-24 22:35:39.000000000 +0100
+++ /dev/null 2004-11-25 03:16:25.000000000 +0100
@@ -1,16 +0,0 @@
-/* Never include this file directly. Include <linux/compiler.h> instead. */
-
-/*
- * These definitions are for Ueber-GCC: always newer than the latest
- * version and hence sporting everything plus a kitchen-sink.
- */
-#include <linux/compiler-gcc.h>
-
-#define inline inline __attribute__((always_inline))
-#define __inline__ __inline__ __attribute__((always_inline))
-#define __inline __inline __attribute__((always_inline))
-#define __deprecated __attribute__((deprecated))
-#define __attribute_used__ __attribute__((__used__))
-#define __attribute_pure__ __attribute__((pure))
-#define __attribute_const__ __attribute__((__const__))
-#define __must_check __attribute__((warn_unused_result))
-
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