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Re: defined(IRIX)


From: Peter Eisentraut
Subject: Re: defined(IRIX)
Date: Fri, 27 Sep 2002 00:27:22 +0200 (CEST)

Bill Moseley writes:

> Someone pointed out the Postgres configure has a test, but didn't have
> time to work that out yet.

Here it is:

AC_INIT

# PGAC_CHECK_ALIGNOF(TYPE, [INCLUDES = DEFAULT-INCLUDES])
# -----------------------------------------------------
# Find the alignment requirement of the given type. Define the result
# as ALIGNOF_TYPE.  This macro works even when cross compiling.
# (Modelled after AC_CHECK_SIZEOF.)

AC_DEFUN([PGAC_CHECK_ALIGNOF],
[AS_LITERAL_IF([$1], [],
               [AC_FATAL([$0: requires literal arguments])])dnl
AC_CHECK_TYPE([$1], [], [], [$2])
AC_CACHE_CHECK([alignment of $1], [AS_TR_SH([pgac_cv_alignof_$1])],
[if test "$AS_TR_SH([ac_cv_type_$1])" = yes; then
  _AC_COMPUTE_INT([((char*) & pgac_struct.field) - ((char*) & pgac_struct)],
                  [AS_TR_SH([pgac_cv_alignof_$1])],
                  [AC_INCLUDES_DEFAULT([$2])
struct { char filler; $1 field; } pgac_struct;],
                  [AC_MSG_ERROR([cannot compute alignment of $1, 77])])
else
  AS_TR_SH([pgac_cv_alignof_$1])=0
fi])dnl
AC_DEFINE_UNQUOTED(AS_TR_CPP(alignof_$1),
                   [$AS_TR_SH([pgac_cv_alignof_$1])],
                   [The alignment requirement of a `$1'])
])# PGAC_CHECK_ALIGNOF

PGAC_CHECK_ALIGNOF([void *])

AC_OUTPUT

-- 
Peter Eisentraut   address@hidden





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