diff options
Diffstat (limited to 'crypto/heimdal/cf/krb-bigendian.m4')
| -rw-r--r-- | crypto/heimdal/cf/krb-bigendian.m4 | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/crypto/heimdal/cf/krb-bigendian.m4 b/crypto/heimdal/cf/krb-bigendian.m4 new file mode 100644 index 0000000..0efbbd0 --- /dev/null +++ b/crypto/heimdal/cf/krb-bigendian.m4 @@ -0,0 +1,57 @@ +dnl +dnl $Id: krb-bigendian.m4,v 1.5 2000/01/08 10:34:44 assar Exp $ +dnl + +dnl check if this computer is little or big-endian +dnl if we can figure it out at compile-time then don't define the cpp symbol +dnl otherwise test for it and define it. also allow options for overriding +dnl it when cross-compiling + +AC_DEFUN(KRB_C_BIGENDIAN, [ +AC_ARG_ENABLE(bigendian, +[ --enable-bigendian the target is big endian], +krb_cv_c_bigendian=yes) +AC_ARG_ENABLE(littleendian, +[ --enable-littleendian the target is little endian], +krb_cv_c_bigendian=no) +AC_CACHE_CHECK(whether byte order is known at compile time, +krb_cv_c_bigendian_compile, +[AC_TRY_COMPILE([ +#include <sys/types.h> +#include <sys/param.h>],[ +#if !BYTE_ORDER || !BIG_ENDIAN || !LITTLE_ENDIAN + bogus endian macros +#endif], krb_cv_c_bigendian_compile=yes, krb_cv_c_bigendian_compile=no)]) +if test "$krb_cv_c_bigendian_compile" = "no"; then + AC_CACHE_CHECK(whether byte ordering is bigendian, krb_cv_c_bigendian,[ + if test "$krb_cv_c_bigendian" = ""; then + krb_cv_c_bigendian=unknown + fi + AC_TRY_COMPILE([ +#include <sys/types.h> +#include <sys/param.h>],[ +#if BYTE_ORDER != BIG_ENDIAN + not big endian +#endif], krb_cv_c_bigendian=yes, krb_cv_c_bigendian=no) + if test "$krb_cv_c_bigendian" = "unknown"; then + AC_TRY_RUN([main () { + /* Are we little or big endian? From Harbison&Steele. */ + union + { + long l; + char c[sizeof (long)]; + } u; + u.l = 1; + exit (u.c[sizeof (long) - 1] == 1); + }], krb_cv_c_bigendian=no, krb_cv_c_bigendian=yes, + AC_MSG_ERROR([specify either --enable-bigendian or --enable-littleendian])) + fi + ]) + if test "$krb_cv_c_bigendian" = "yes"; then + AC_DEFINE(WORDS_BIGENDIAN, 1, [define if target is big endian])dnl + fi +fi +if test "$krb_cv_c_bigendian_compile" = "yes"; then + AC_DEFINE(ENDIANESS_IN_SYS_PARAM_H, 1, [define if sys/param.h defines the endiness])dnl +fi +]) |
