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