From 26e7e7cddda6947525e5fc0d2bf514e09c68cd3c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fredrik=20H=C3=BCbinette=20=28Hubbe=29?= <hubbe@hubbe.net>
Date: Tue, 23 Apr 1996 22:31:49 +0200
Subject: [PATCH] now really tests for %pure_parser
Rev: src/configure.in:1.10
---
src/configure.in | 98 +++++++++++++++++++++++++++++++++++++-----------
1 file changed, 77 insertions(+), 21 deletions(-)
diff --git a/src/configure.in b/src/configure.in
index 8070285c90..b632c48c3a 100644
--- a/src/configure.in
+++ b/src/configure.in
@@ -1,5 +1,6 @@
AC_INIT(interpret.c)
AC_PROG_CC
+AC_C_CROSS
# We need some special hacks when running slowaris
AC_PATH_PROG(uname_prog,uname,no)
@@ -100,33 +101,87 @@ fi
AC_CONFIG_HEADER(machine.h)
AC_PROG_INSTALL
-AC_PROG_YACC
AC_PROG_CPP
AC_PROG_RANLIB
AC_SET_MAKE
-AC_CHECK_PROG(has_strings, strings, yes, no)
-if test "$has_strings" = "yes"; then
- yacc_prog=`echo $YACC | sed 's/^\([^ ]*\) .*$/\1/'`
- AC_PATH_PROG(yacc_prog,$yacc_prog,/bin/true)
-
- AC_MSG_CHECKING(if $YACC handles pure_parser)
- AC_CACHE_VAL(lpc_cv_yacc_pure_parser,
- [
- lpc_cv_yacc_pure_parser=no
- strings $yacc_prog >conftest.bar
- if egrep pure_parser conftest.bar >/dev/null; then
- lpc_cv_yacc_pure_parser=yes
+AC_MSG_CHECKING(for yacc clone that handles %pure_parser)
+AC_CACHE_VAL(lpc_cv_prog_working_yacc,
+[
+for YACC in byacc "bison -y" yacc "echo Get bison if you want to make export" ; do
+ set dummy $YACC; ac_word=$2
+ has_it=no
+ IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
+ for ac_dir in $PATH; do
+ test -z "$ac_dir" && ac_dir=.
+ if test -f $ac_dir/$ac_word; then
+ has_it="yes"
+ break
fi
- ])
+ done
+ IFS="$ac_save_ifs"
+
+ if test "$has_it" = "yes"; then
+cat >conftest.y<<\EOF
+%pure_parser
+%{
+void parse();
+void yyerror(char *);
+%}
+%%
+all: foo bar
+foo: 'f' 'o' 'o' { parse(); } ;
+bar: 'b' 'a' 'r' ;
+%%
+int context;
- if test "$lpc_cv_yacc_pure_parser" = "yes"; then
- AC_MSG_RESULT(yes)
- else
- AC_MSG_RESULT([[no, get bison and retry... (giving up)]])
- exit 1
+int yylex(YYSTYPE *yylval)
+{
+ switch(context++)
+ {
+ case 0: return 'f';
+ case 1: return 'o';
+ case 2: return 'o';
+ case 3: return 'b';
+ case 4: return 'a';
+ case 5: return 'r';
+ default: return 0;
+ }
+}
+
+int depth=0;
+void parse()
+{
+ int tmp;
+ if(depth++>5) return;
+ tmp=context;
+ context=0;
+ yyparse();
+ context=tmp;
+}
+int errors=0;
+void yyerror(char *fel) { errors++; }
+int main()
+{
+ parse();
+ exit(errors);
+}
+EOF
+ if $YACC -d conftest.y 1>&5 2>&5; then
+ AC_TRY_RUN([
+#include "y.tab.c"
+],pure_parser_works=yes,pure_parser_works=no)
+ if test "$pure_parser_works" = "yes"; then
+ break
+ fi
+ fi
fi
-fi
+done
+lpc_cv_prog_working_yacc="$YACC"
+])
+
+YACC="$lpc_cv_prog_working_yacc"
+AC_MSG_RESULT($YACC)
AC_MSG_CHECKING(first yacc define)
AC_CACHE_VAL(lpc_cv_yacc_first,
@@ -138,7 +193,7 @@ all: GURKA
%%
EOF
lpc_cv_yacc_first=257;
-if $YACC -d conftest.y ; then
+if $YACC -d conftest.y 1>&5 2>&5; then
if test -f y.tab.h; then
lpc_cv_yacc_first=`egrep GURKA y.tab.h | sed 's/^#[^0-9]*\([0-9]*\)[^0-9]*$/\1/'`
echo $lpc_cv_yacc_first >conftest.out
@@ -762,6 +817,7 @@ BUILDDIR=`pwd`
AC_CONFIG_SUBDIRS($dirs)
+AC_SUBST(YACC)
AC_SUBST(MODULE_OBJS)
AC_SUBST(INSTALL)
AC_SUBST(WARN)
--
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