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platform compatibility work (by Dan Fandrich)

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Signed-off-by: Dan Fandrich <dan@coneharvesters.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Dan Fandrich
2009-10-27 11:05:00 +01:00
committed by Denys Vlasenko
parent d83bbf4193
commit 21a542d7d7
4 changed files with 100 additions and 65 deletions
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62
include/platform.h
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@@ -7,6 +7,13 @@
#ifndef BB_PLATFORM_H
#define BB_PLATFORM_H 1
/* Assume all these functions exist by default. Platforms where it is not
* true will #undef them below.
*/
#define HAVE_FDPRINTF 1
#define HAVE_STRCHRNUL 1
#define HAVE_VASPRINTF 1
/* Convenience macros to test the version of gcc. */
#undef __GNUC_PREREQ
#if defined __GNUC__ && defined __GNUC_MINOR__
@@ -126,7 +133,6 @@
# define __BIG_ENDIAN__ (BYTE_ORDER == BIG_ENDIAN)
# define __BYTE_ORDER BYTE_ORDER
#elif defined __FreeBSD__
char *strchrnul(const char *s, int c);
# include <sys/resource.h> /* rlimit */
# include <machine/endian.h>
# define bswap_64 __bswap64
@@ -148,7 +154,7 @@ char *strchrnul(const char *s, int c);
# define BB_BIG_ENDIAN 0
# define BB_LITTLE_ENDIAN 1
#else
# error "Can't determine endiannes"
# error "Can't determine endianness"
#endif
/* SWAP_LEnn means "convert CPU<->little_endian by swapping bytes" */
@@ -293,24 +299,6 @@ typedef unsigned smalluint;
# define USE_FOR_MMU(...) __VA_ARGS__
#endif
/* Platforms that haven't got dprintf need to implement fdprintf() in
* libbb. This would require a platform.c. It's not going to be cleaned
* out of the tree, so stop saying it should be. */
#if !defined(__dietlibc__)
/* Needed for: glibc */
/* Not needed for: dietlibc */
/* Others: ?? (add as needed) */
# define fdprintf dprintf
#endif
#if defined(__dietlibc__)
static ALWAYS_INLINE char* strchrnul(const char *s, char c)
{
while (*s && *s != c) ++s;
return (char*)s;
}
#endif
/* Don't use lchown with glibc older than 2.1.x */
#if defined(__GLIBC__) && __GLIBC__ <= 2 && __GLIBC_MINOR__ < 1
# define lchown chown
@@ -342,5 +330,39 @@ static ALWAYS_INLINE char* strchrnul(const char *s, char c)
#endif
#if defined(__GLIBC__)
# define fdprintf dprintf
#endif
#if defined(__dietlibc__)
#undef HAVE_STRCHRNUL
#endif
#if defined(__WATCOMC__)
#undef HAVE_FDPRINTF
#undef HAVE_STRCHRNUL
#undef HAVE_VASPRINTF
#endif
#if defined(__FreeBSD__)
#undef HAVE_STRCHRNUL
#endif
/*
* Now, define prototypes for all the functions defined in platform.c
* These must come after all the HAVE_* macros are defined (or not)
*/
#ifndef HAVE_STRCHRNUL
extern char *strchrnul(const char *s, int c) FAST_FUNC;
#endif
#ifndef HAVE_VASPRINTF
extern int vasprintf(char **string_ptr, const char *format, va_list p) FAST_FUNC;
#endif
#ifndef HAVE_FDPRINTF
extern int fdprintf(int fd, const char *format, ...);
#endif
#endif