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* tests/semantics.at (AC_C_BIGENDIAN): Explicitelly save and load

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endianness for comparison instead of relying on AT_CHECK_ENV.
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Alexandre Duret-Lutz 2001-08-12 15:20:29 +00:00
parent c3de1bb1e5
commit c659b9f763
2 changed files with 21 additions and 21 deletions
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@ -1,3 +1,8 @@
2001-08-12 Alexandre Duret-Lutz <duret_g@epita.fr>
* tests/semantics.at (AC_C_BIGENDIAN): Explicitelly save and load
endianness for comparison instead of relying on AT_CHECK_ENV.
2001-08-11 Paul Eggert <eggert@twinsun.com>
* doc/autoconf.texi, doc/install.texi: Add a copyright notice

37
tests/semantics.at
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@ -329,38 +329,33 @@ AT_CLEANUP(path)
AT_SETUP(AC_C_BIGENDIAN)
# Make sure that AC_C_BIGENDIAN behave the same whether we are
# cross-compiling or not. Actually, the tests are differents in both
# case, and the cross-compiling case is allowed to fail (BTW, it might
# be interesting to replace [:] by [touch at-uendian] to cach systems for
# which AC_C_BIGENDIAN does fail, just to know if such a system
# exists.)
# cross-compiling or not.
# The following is an manually-expansed call to _AT_CHECK_AC_MACRO
# with the call to AC_CHECK_ENV removed. We don't want AC_CHECK_ENV
# because we are creating a new file (at-bendian or at-lendian)
# as a side effect of AT_CHECK_CONFIGURE.
AT_CONFIGURE_AC([AC_C_BIGENDIAN([touch at-bendian],[touch at-lendian],[:])])
AT_CHECK_AUTOCONF
AT_CHECK_AUTOHEADER
AT_CHECK_CONFIGURE
_AT_CHECK_AC_MACRO(
[AC_C_BIGENDIAN([ac_endian=big],[ac_endian=little],[ac_endian=unknown])
echo $ac_endian > at-endian
])
rm -f config.hin # So that next run of autoheader is quiet.
# The last run of AC_CHECK_CONFIGURE has created at-bendian or at-lendian.
# Now we'll perform the same in cross-compiling mode, and make sure
# that no new file is created (if a new file is created it means
# AC_C_BIGENDIAN computed a different result). Checking for a new
# file is done using AC_CHECK_ENV which is called by _AT_CHECK_AC_MACRO.
_AT_CHECK_AC_MACRO(
[cross_compiling=yes
AC_C_BIGENDIAN([touch at-bendian],[touch at-lendian],[:])])
AC_C_BIGENDIAN([ac_endian=big],[ac_endian=little],[ac_endian=unknown])
ac_prevendian=`cat at-endian`
# Chech we have found the same result as in the previous run
# or unknown (because the cross-compiling check is allowed to fail;
# although it might be interesting to suppress this comparison, just
# to know on which system it fails if it ever does).
if test $ac_endian != $ac_prevendian -a $ac_endian != unknow; then
AC_MSG_ERROR([unexpected endianness: first run found '$ac_prevendian' but second run found '$ac_endian'])
fi
])
# Make sure AC_C_BIGENDIAN with no argument will define WORDS_BIGENDIAN
AT_CONFIGURE_AC([AC_C_BIGENDIAN])
AT_CHECK_AUTOHEADER
AT_CHECK([grep WORDS_BIGENDIAN config.hin], [], [ignore])
AT_CLEANUP(at-bendian at-lendian)
AT_CLEANUP(at-endian)
# ------------------------------ #
# AC_PATH_PROG & AC_PATH_PROGS. #