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Viewing changes to acinclude.m4

  • Committer: Bazaar Package Importer
  • Author(s): Glenn McGrath
  • Date: 2004-06-26 12:59:02 UTC
  • Revision ID: james.westby@ubuntu.com-20040626125902-w97jpn43hsk7tcde
Tags: upstream-0.3.3
Import upstream version 0.3.3

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acinclude.m4
 
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define(GNUPG_CHECK_ENDIAN,
 
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  [ if test "$cross_compiling" = yes; then
 
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        AC_MSG_WARN(cross compiling; assuming big endianess)
 
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    fi
 
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    AC_MSG_CHECKING(endianess)
 
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    AC_CACHE_VAL(gnupg_cv_c_endian,
 
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      [ gnupg_cv_c_endian=unknown
 
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        # See if sys/param.h defines the BYTE_ORDER macro.
 
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        AC_TRY_COMPILE([#include <sys/types.h>
 
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        #include <sys/param.h>], [
 
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        #if !BYTE_ORDER || !BIG_ENDIAN || !LITTLE_ENDIAN
 
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         bogus endian macros
 
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        #endif], [# It does; now see whether it defined to BIG_ENDIAN or not.
 
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        AC_TRY_COMPILE([#include <sys/types.h>
 
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        #include <sys/param.h>], [
 
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        #if BYTE_ORDER != BIG_ENDIAN
 
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         not big endian
 
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        #endif], gnupg_cv_c_endian=big, gnupg_cv_c_endian=little)])
 
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        if test "$gnupg_cv_c_endian" = unknown; then
 
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            AC_TRY_RUN([main () {
 
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              /* Are we little or big endian?  From Harbison&Steele.  */
 
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              union
 
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              {
 
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                long l;
 
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                char c[sizeof (long)];
 
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              } u;
 
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              u.l = 1;
 
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              exit (u.c[sizeof (long) - 1] == 1);
 
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              }],
 
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              gnupg_cv_c_endian=little,
 
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              gnupg_cv_c_endian=big,
 
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              gnupg_cv_c_endian=big
 
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            )
 
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        fi
 
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      ])
 
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    AC_MSG_RESULT([$gnupg_cv_c_endian])
 
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    if test "$gnupg_cv_c_endian" = little; then
 
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      AC_DEFINE(LITTLE_ENDIAN_HOST,1,
 
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                [Defined if the host has little endian byte ordering])
 
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    else
 
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      AC_DEFINE(BIG_ENDIAN_HOST,1,
 
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                [Defined if the host has big endian byte ordering])
 
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    fi
 
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  ])