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- #
- # Check to make sure that the build environment is sane.
- #
-
- AC_DEFUN(AM_SANITY_CHECK,
- [AC_MSG_CHECKING([whether build environment is sane])
- # Just in case
- sleep 1
- echo timestamp > conftestfile
- # Do `set' in a subshell so we don't clobber the current shell's
- # arguments. Must try -L first in case configure is actually a
- # symlink; some systems play weird games with the mod time of symlinks
- # (eg FreeBSD returns the mod time of the symlink's containing
- # directory).
- if (
- set X `ls -Lt $srcdir/configure conftestfile 2> /dev/null`
- if test "[$]*" = "X"; then
- # -L didn't work.
- set X `ls -t $srcdir/configure conftestfile`
- fi
- if test "[$]*" != "X $srcdir/configure conftestfile" \
- && test "[$]*" != "X conftestfile $srcdir/configure"; then
-
- # If neither matched, then we have a broken ls. This can happen
- # if, for instance, CONFIG_SHELL is bash and it inherits a
- # broken ls alias from the environment. This has actually
- # happened. Such a system could not be considered "sane".
- AC_MSG_ERROR([ls -t appears to fail. Make sure there is not a broken
- alias in your environment])
- fi
-
- test "[$]2" = conftestfile
- )
- then
- # Ok.
- :
- else
- AC_MSG_ERROR([newly created file is older than distributed files!
- Check your system clock])
- fi
- rm -f conftest*
- AC_MSG_RESULT(yes)])
-