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#! /bin/sh |
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# ylwrap - wrapper for lex/yacc invocations. |
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scriptversion=2009-04-28.21; # UTC |
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scriptversion=2011-08-25.18; # UTC |
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# Copyright (C) 1996, 1997, 1998, 1999, 2001, 2002, 2003, 2004, 2005, |
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# 2007, 2009 Free Software Foundation, Inc. |
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# 2007, 2009, 2010, 2011 Free Software Foundation, Inc. |
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# |
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# Written by Tom Tromey <tromey@cygnus.com>. |
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# |
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# FIXME: add hostname here for parallel makes that run commands on |
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# other machines. But that might take us over the 14-char limit. |
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dirname=ylwrap$$ |
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trap "cd '`pwd`'; rm -rf $dirname > /dev/null 2>&1" 1 2 3 15 |
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do_exit="cd '`pwd`' && rm -rf $dirname > /dev/null 2>&1;"' (exit $ret); exit $ret' |
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trap "ret=129; $do_exit" 1 |
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trap "ret=130; $do_exit" 2 |
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trap "ret=141; $do_exit" 13 |
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trap "ret=143; $do_exit" 15 |
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mkdir $dirname || exit 1 |
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cd $dirname |
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# Handle y_tab.c and y_tab.h output by DOS |
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if test $y_tab_nodot = "yes"; then |
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if test $from = "y.tab.c"; then |
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from="y_tab.c" |
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from="y_tab.c" |
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else |
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if test $from = "y.tab.h"; then |
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from="y_tab.h" |
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fi |
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if test $from = "y.tab.h"; then |
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from="y_tab.h" |
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fi |
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fi |
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fi |
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if test -f "$from"; then |
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# If $2 is an absolute path name, then just use that, |
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# otherwise prepend `../'. |
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case "$2" in |
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[\\/]* | ?:[\\/]*) target="$2";; |
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*) target="../$2";; |
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[\\/]* | ?:[\\/]*) target="$2";; |
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*) target="../$2";; |
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esac |
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# We do not want to overwrite a header file if it hasn't |
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# Makefile. Divert the output of all other files to a temporary |
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# file so we can compare them to existing versions. |
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if test $first = no; then |
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realtarget="$target" |
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target="tmp-`echo $target | sed s/.*[\\/]//g`" |
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realtarget="$target" |
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target="tmp-`echo $target | sed s/.*[\\/]//g`" |
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fi |
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# Edit out `#line' or `#' directives. |
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# |
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# Check whether header files must be updated. |
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if test $first = no; then |
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if test -f "$realtarget" && cmp -s "$realtarget" "$target"; then |
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echo "$2" is unchanged |
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rm -f "$target" |
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else |
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if test -f "$realtarget" && cmp -s "$realtarget" "$target"; then |
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echo "$2" is unchanged |
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rm -f "$target" |
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else |
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echo updating "$2" |
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mv -f "$target" "$realtarget" |
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fi |
