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configure: add check for bswap_64

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include/f2fs_fs.h checks the HAVE_BSWAP_64 conidtional, but configure
nevers checks for it.

Add a check that the function is indeed declared, and fix the variable
name to match the naming scheme of autoconf (and not those of WAF like
is used by samba), and adapt the check as suggested in the autoconf
manual.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Yann E. MORIN 2014-12-25 18:52:00 +01:00 committed by Jaegeuk Kim
parent 936945a25d
commit dc532e5316
2 changed files with 4 additions and 1 deletions
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3
configure.ac
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@ -72,6 +72,9 @@ AC_CHECK_FUNCS_ONCE([
memset
])
AS_IF([test "$ac_cv_header_byteswap_h" = "yes"],
[AC_CHECK_DECLS([bswap_64],,,[#include <byteswap.h>])])
# Install directories
AC_PREFIX_DEFAULT([/usr])
AC_SUBST([sbindir], [/sbin])

2
include/f2fs_fs.h
View File

@ -63,7 +63,7 @@ static inline uint32_t bswap_32(uint32_t val)
}
#endif /* !HAVE_BYTESWAP_H */
#if !HAVE_BSWAP_64
#if defined HAVE_DECL_BSWAP_64 && !HAVE_DECL_BSWAP_64
/**
* bswap_64 - reverse bytes in a uint64_t value.
* @val: value whose bytes to swap.