+YACC: error message
+Usage: YACC [options] filename
+
+Options:
+ -b file_prefix set filename prefix (default "y.")
+ -B create a backtracking parser
+ -d write definitions (.tab.h)
+ -h print this help-message
+ -H defines_file write definitions to defines_file
+ -i write interface (y.tab.i)
+ -g write a graphical description
+ -l suppress #line directives
+ -L enable position processing, e.g., "%locations"
+ -o output_file (default ".tab.c")
+ -p symbol_prefix set symbol prefix (default "yy")
+ -P create a reentrant parser, e.g., "%pure-parser"
+ -r produce separate code and table files (y.code.c)
+ -s suppress #define's for quoted names in %token lines
+ -t add debugging support
+ -v write description (y.output)
+ -V show version information and exit
+
+Long options:
+ --defines -H
+ --file-prefix -b
+ --graph -g
+ --help -h
+ --name-prefix -p
+ --no-lines -l
+ --output -o
+ --version -V