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configure.ac: test for common byte-swapping functions

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Test for a variety of common byte-swapping functions.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
H. Peter Anvin 2017-04-18 15:49:25 -07:00
parent 96b2895ac0
commit 5eb528b6c5
1 changed files with 23 additions and 0 deletions
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23
configure.ac
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@ -139,6 +139,29 @@ AC_CHECK_DECLS(strnlen)
dnl Check for missing types
AC_TYPE_UINTPTR_T
dnl
dnl Look for byte-swapping support...
dnl
PA_ADD_HEADERS(endian.h asm/byteorder.h)
PA_HAVE_FUNC(__cpu_to_le16, (0))
PA_HAVE_FUNC(__cpu_to_le32, (0))
PA_HAVE_FUNC(__cpu_to_le64, (0))
PA_HAVE_FUNC(cpu_to_le16, (0))
PA_HAVE_FUNC(cpu_to_le32, (0))
PA_HAVE_FUNC(cpu_to_le64, (0))
PA_HAVE_FUNC(__cpu_to_le16, (0))
PA_HAVE_FUNC(__cpu_to_le32, (0))
PA_HAVE_FUNC(__cpu_to_le64, (0))
PA_HAVE_FUNC(htole16, (0))
PA_HAVE_FUNC(htole32, (0))
PA_HAVE_FUNC(htole64, (0))
PA_HAVE_FUNC(__bswap_16, (0))
PA_HAVE_FUNC(__bswap_32, (0))
PA_HAVE_FUNC(__bswap_64, (0))
PA_HAVE_FUNC(__builtin_bswap16, (0))
PA_HAVE_FUNC(__builtin_bswap32, (0))
PA_HAVE_FUNC(__builtin_bswap64, (0))
dnl
dnl Check for supported gcc attributes; some compilers (e.g. Sun CC)
dnl support these, but don't define __GNUC__ as they don't support