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Date: Thu, 8 May 2014 15:23:56 -0600
From: Andreas Dilger <adilger@...ger.ca>
To: tytso@....edu
Cc: linux-ext4@...r.kernel.org, Andreas Dilger <adilger@...ger.ca>
Subject: [PATCH] blkid,ext2fs: avoid name clash with __u{8,16,32,64}
Try to avoid name clashes with definitions of __u8, __u16, __u32,
and __u64 in userspace, in case other headers also define these
types. Define HAVE___{S,U}{8,16,32,64} preprocessor macros to
show that these types are already defined.
This would avoid the need to check for _BLKID_TYPES_H in ext2_types.h
and _EXT2_TYPES_H in blkid_types.h, but since older versions of these
headers did not use HAVE___U8 et.al. keep these checks around for now.
Report an error if there are no 64-bit types available. The code
will not compile if these are not available.
Signed-off-by: Andreas Dilger <adilger@...ger.ca>
---
lib/blkid/blkid_types.h.in | 39 ++++++++++++++++++++++++++++++++++++---
lib/ext2fs/ext2_types.h.in | 35 ++++++++++++++++++++++++++++++++++-
2 files changed, 70 insertions(+), 4 deletions(-)
diff --git a/lib/blkid/blkid_types.h.in b/lib/blkid/blkid_types.h.in
index 2edc0da..d4c81d0 100644
--- a/lib/blkid/blkid_types.h.in
+++ b/lib/blkid/blkid_types.h.in
@@ -9,18 +9,26 @@
@ASM_TYPES_HEADER@
+#ifndef HAVE___U8
+#define HAVE___U8
#ifdef __U8_TYPEDEF
typedef __U8_TYPEDEF __u8;
#else
typedef unsigned char __u8;
#endif
+#endif /* HAVE___U8 */
+#ifndef HAVE___S8
+#define HAVE___S8
#ifdef __S8_TYPEDEF
typedef __S8_TYPEDEF __s8;
#else
typedef signed char __s8;
#endif
+#endif /* HAVE___S8 */
+#ifndef HAVE___U16
+#define HAVE___U16
#ifdef __U16_TYPEDEF
typedef __U16_TYPEDEF __u16;
#else
@@ -30,11 +38,15 @@ typedef unsigned int __u16;
#if (@SIZEOF_SHORT@ == 2)
typedef unsigned short __u16;
#else
+#undef HAVE___U16
?==error: undefined 16 bit type
#endif /* SIZEOF_SHORT == 2 */
#endif /* SIZEOF_INT == 2 */
#endif /* __U16_TYPEDEF */
+#endif /* HAVE___U16 */
+#ifndef HAVE___S16
+#define HAVE___S16
#ifdef __S16_TYPEDEF
typedef __S16_TYPEDEF __s16;
#else
@@ -44,12 +56,15 @@ typedef int __s16;
#if (@SIZEOF_SHORT@ == 2)
typedef short __s16;
#else
+#undef HAVE___S16
?==error: undefined 16 bit type
#endif /* SIZEOF_SHORT == 2 */
#endif /* SIZEOF_INT == 2 */
#endif /* __S16_TYPEDEF */
+#endif /* HAVE___S16 */
-
+#ifndef HAVE___U32
+#define HAVE___U32
#ifdef __U32_TYPEDEF
typedef __U32_TYPEDEF __u32;
#else
@@ -62,12 +77,16 @@ typedef unsigned long __u32;
#if (@SIZEOF_SHORT@ == 4)
typedef unsigned short __u32;
#else
+#undef HAVE___U32
?== error: undefined 32 bit type
#endif /* SIZEOF_SHORT == 4 */
#endif /* SIZEOF_LONG == 4 */
#endif /* SIZEOF_INT == 4 */
#endif /* __U32_TYPEDEF */
+#endif /* HAVE___U32 */
+#ifndef HAVE___S32
+#define HAVE___S32
#ifdef __S32_TYPEDEF
typedef __S32_TYPEDEF __s32;
#else
@@ -80,12 +99,16 @@ typedef long __s32;
#if (@SIZEOF_SHORT@ == 4)
typedef short __s32;
#else
+#undef HAVE___S32
?== error: undefined 32 bit type
#endif /* SIZEOF_SHORT == 4 */
#endif /* SIZEOF_LONG == 4 */
#endif /* SIZEOF_INT == 4 */
#endif /* __S32_TYPEDEF */
+#endif /* HAVE___S32 */
+#ifndef HAVE___U64
+#define HAVE___U64
#ifdef __U64_TYPEDEF
typedef __U64_TYPEDEF __u64;
#else
@@ -97,11 +120,17 @@ typedef unsigned long long __u64;
#else
#if (@SIZEOF_LONG@ == 8)
typedef unsigned long __u64;
+#else
+#undef HAVE___U64
+ ?== error: undefined 64 bit type
#endif /* SIZEOF_LONG == 8 */
#endif /* SIZEOF_LONG_LONG == 8 */
#endif /* SIZEOF_INT == 8 */
#endif /* __U64_TYPEDEF */
+#endif /* HAVE___U64 */
+#ifndef HAVE___S64
+#define HAVE___S64
#ifdef __S64_TYPEDEF
typedef __S64_TYPEDEF __s64;
#else
@@ -110,17 +139,21 @@ typedef int __s64;
#else
#if (@SIZEOF_LONG_LONG@ == 8)
#if defined(__GNUC__)
-typedef __signed__ long long __s64;
+typedef __signed__ long long __s64;
#else
-typedef signed long long __s64;
+typedef signed long long __s64;
#endif /* __GNUC__ */
#else
#if (@SIZEOF_LONG@ == 8)
typedef long __s64;
+#else
+#undef HAVE___S64
+ ?== error: undefined 64 bit type
#endif /* SIZEOF_LONG == 8 */
#endif /* SIZEOF_LONG_LONG == 8 */
#endif /* SIZEOF_INT == 8 */
#endif /* __S64_TYPEDEF */
+#endif /* HAVE___S64 */
#undef __S8_TYPEDEF
#undef __U8_TYPEDEF
diff --git a/lib/ext2fs/ext2_types.h.in b/lib/ext2fs/ext2_types.h.in
index 5b98f71..1320431 100644
--- a/lib/ext2fs/ext2_types.h.in
+++ b/lib/ext2fs/ext2_types.h.in
@@ -9,18 +9,26 @@
@ASM_TYPES_HEADER@
+#ifndef HAVE___U8
+#define HAVE___U8
#ifdef __U8_TYPEDEF
typedef __U8_TYPEDEF __u8;
#else
typedef unsigned char __u8;
#endif
+#endif /* HAVE___U8 */
+#ifndef HAVE___S8
+#define HAVE___S8
#ifdef __S8_TYPEDEF
typedef __S8_TYPEDEF __s8;
#else
typedef signed char __s8;
#endif
+#endif /* HAVE___S8 */
+#ifndef HAVE___U16
+#define HAVE___U16
#ifdef __U16_TYPEDEF
typedef __U16_TYPEDEF __u16;
#else
@@ -30,11 +38,15 @@ typedef unsigned int __u16;
#if (@SIZEOF_SHORT@ == 2)
typedef unsigned short __u16;
#else
+#undef HAVE___U16
?==error: undefined 16 bit type
#endif /* SIZEOF_SHORT == 2 */
#endif /* SIZEOF_INT == 2 */
#endif /* __U16_TYPEDEF */
+#endif /* HAVE___U16 */
+#ifndef HAVE___S16
+#define HAVE___S16
#ifdef __S16_TYPEDEF
typedef __S16_TYPEDEF __s16;
#else
@@ -44,12 +56,15 @@ typedef int __s16;
#if (@SIZEOF_SHORT@ == 2)
typedef short __s16;
#else
+#undef HAVE___S16
?==error: undefined 16 bit type
#endif /* SIZEOF_SHORT == 2 */
#endif /* SIZEOF_INT == 2 */
#endif /* __S16_TYPEDEF */
+#endif /* HAVE___S16 */
-
+#ifndef HAVE___U32
+#define HAVE___U32
#ifdef __U32_TYPEDEF
typedef __U32_TYPEDEF __u32;
#else
@@ -62,12 +77,16 @@ typedef unsigned long __u32;
#if (@SIZEOF_SHORT@ == 4)
typedef unsigned short __u32;
#else
+#undef HAVE___U32
?== error: undefined 32 bit type
#endif /* SIZEOF_SHORT == 4 */
#endif /* SIZEOF_LONG == 4 */
#endif /* SIZEOF_INT == 4 */
#endif /* __U32_TYPEDEF */
+#endif /* HAVE___U32 */
+#ifndef HAVE___S32
+#define HAVE___S32
#ifdef __S32_TYPEDEF
typedef __S32_TYPEDEF __s32;
#else
@@ -80,12 +99,16 @@ typedef long __s32;
#if (@SIZEOF_SHORT@ == 4)
typedef short __s32;
#else
+#undef HAVE___S32
?== error: undefined 32 bit type
#endif /* SIZEOF_SHORT == 4 */
#endif /* SIZEOF_LONG == 4 */
#endif /* SIZEOF_INT == 4 */
#endif /* __S32_TYPEDEF */
+#endif /* HAVE___S32 */
+#ifndef HAVE___U64
+#define HAVE___U64
#ifdef __U64_TYPEDEF
typedef __U64_TYPEDEF __u64;
#else
@@ -97,11 +120,17 @@ typedef unsigned long long __u64;
#else
#if (@SIZEOF_LONG@ == 8)
typedef unsigned long __u64;
+#else
+#undef HAVE___U64
+ ?== error: undefined 64 bit type
#endif /* SIZEOF_LONG_LONG == 8 */
#endif /* SIZEOF_LONG == 8 */
#endif /* SIZEOF_INT == 8 */
#endif /* __U64_TYPEDEF */
+#endif /* HAVE___U64 */
+#ifndef HAVE___S64
+#define HAVE___S64
#ifdef __S64_TYPEDEF
typedef __S64_TYPEDEF __s64;
#else
@@ -117,10 +146,14 @@ typedef signed long long __s64;
#else
#if (@SIZEOF_LONG@ == 8)
typedef long __s64;
+#else
+#undef HAVE___S64
+ ?== error: undefined 64 bit type
#endif /* SIZEOF_LONG_LONG == 8 */
#endif /* SIZEOF_LONG == 8 */
#endif /* SIZEOF_INT == 8 */
#endif /* __S64_TYPEDEF */
+#endif /* HAVE___S64 */
#undef __S8_TYPEDEF
#undef __U8_TYPEDEF
--
1.7.3.4
--
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