incompatibility with GNU YACC/BISON

[e-kwsm]

• libxo: 1.7.5 (fd5db1b)
• yacc: bison (GNU Bison) 3.8.2—a wrapper around bison

$ sh bin/setup.sh
$ cd build
$ ../configure
…
checking for byacc... no
checking for yacc... yacc
…
  yacc:             yacc
…
$ make distcheck
…
make  distdir-am
make[4]: Entering directory '/tmp/libxo/build/libxo'
  YACC     xo_xpath.y ...
/usr/bin/bison: invalid option -- 'P'
Try '/usr/bin/bison --help' for more information.
make[4]: *** [Makefile:996: xo_xpath.c] Error 1
make[4]: Leaving directory '/tmp/libxo/build/libxo'
make[3]: *** [Makefile:809: distdir] Error 2
make[3]: Leaving directory '/tmp/libxo/build/libxo'
make[2]: *** [Makefile:689: distdir-am] Error 1
make[2]: Leaving directory '/tmp/libxo/build'
make[1]: *** [Makefile:683: distdir] Error 2
make[1]: Leaving directory '/tmp/libxo/build'
make: *** [Makefile:793: dist] Error 2

libxo/configure.ac

Line 41 in fd5db1b

AC_CHECK_PROGS(YACC, [byacc yacc 'bison -y'], )

libxo/libxo/Makefile.am

Line 62 in fd5db1b

YACC_OPTS = -P -p xo_xpath_yy -d -v -s -b xo_xpath

GNU yacc does not support -P and -s options, and POSIX Yacc does not support string literals [-Wyacc].

libxo/libxo/xo_xpath.y

Lines 22 to 85 in fd5db1b

	%token L_ASSIGN 1 ":="
	%token L_AT 2 "@"
	%token L_CBRACE 3 "}"
	%token L_COMMA 4 ","
	%token L_COLON 5 ":"
	%token L_DAMPER 6 "&&"
	%token L_DCOLON 7 "::"
	%token L_DEQUALS 8 "=="
	%token L_DOTDOT 9 ".."
	%token L_DOTDOTDOT 10 "..."
	%token L_DSLASH 11 "//"
	%token L_DVBAR 12 "||"
	%token L_EOS 13 ";"
	%token L_EQUALS 14 "="
	%token L_GRTR 15 ">"
	%token L_GRTREQ 16 ">="
	%token L_LESS 17 "<"
	%token L_LESSEQ 18 "<="
	%token L_MINUS 19 "-"
	%token L_NOT 20 "!"
	%token L_NOTEQUALS 21 "!="
	%token L_OBRACE 22 "{"
	%token L_OBRACK 23 "["
	%token L_OPAREN 24 "("
	%token L_PLUS 25 "+"
	%token L_PLUSEQUALS 26 "+="
	%token L_QUESTION 27 "?"
	%token L_SLASH 28 "/"
	%token L_STAR 29 "*"
	%token L_UNDERSCORE 30 "_"
	%token L_VBAR 31 "|"
	%token L_LAST 32 /* Last literal token value */
	/*
	* Keyword tokens
	*/
	%token K_COMMENT 33 "comment"
	%token K_ID 34 "id"
	%token K_KEY 35 "key"
	%token K_NODE 36 "node"
	%token K_PROCESSING_INSTRUCTION 37 "processing-instruction"
	%token K_TEXT 38 "text"
	/*
	* Operator keyword tokens, which might be NCNames if they appear inside an
	* XPath expression
	*/
	%token M_OPERATOR_FIRST 39 /* Magic marker: first operator keyword */
	%token K_AND 40 "and"
	%token K_DIV 41 "div"
	%token K_MOD 42 "mod"
	%token K_OR 43 "or"
	%token M_OPERATOR_LAST 44 /* Magic marker: last operator keyword */
	/*
	* Literal tokens which _may_ preceed the multiplication operator
	*/
	%token M_MULTIPLICATION_TEST_LAST 45 /* Magic marker: highest token number */
	%token L_ASTERISK 46 /* "*" */
	%token L_CBRACK 47 "]"
	%token L_CPAREN 48 ")"
	%token L_DOT 49 "."