1 files changed, 46 insertions, 0 deletions
diff --git a/libjava/classpath/m4/ac_prog_antlr.m4 b/libjava/classpath/m4/ac_prog_antlr.m4
new file mode 100644
index 00000000000..e2c10780ae3
--- /dev/null
+++ b/libjava/classpath/m4/ac_prog_antlr.m4
@@ -0,0 +1,46 @@
+
+AC_DEFUN([AC_LIB_ANTLR],[
+  AC_MSG_CHECKING([for the ANTLR parser generator JAR file])
+  if test -z "$ANTLR_JAR"; then
+    for antlr_lib_home in `ls -d /usr/local/share/antlr* 2> /dev/null` \
+	/usr/share/antlr/lib /usr/share/java /usr/lib;
+	do
+	    if test -f "$antlr_lib_home/antlr.jar"; then
+	      ANTLR_JAR="$antlr_lib_home/antlr.jar"
+	      break
+	    fi
+     done
+  fi
+  test -f $ANTLR_JAR || AC_MSG_ERROR([specified ANTLR jar file $ANTLR_JAR not found.]) \
+        && AC_MSG_RESULT([$ANTLR_JAR])
+  AC_SUBST(ANTLR_JAR)
+  AC_PROVIDE([$0])dnl
+])
+
+AC_DEFUN([AC_PROG_ANTLR],[
+  AC_REQUIRE([AC_PROG_JAVA])dnl
+  AC_CHECK_TOOLS([ANTLR], [cantlr runantlr antlr])
+  if test "x$ANTLR" = x; then
+      if test -z "$JAVA"; then
+        AC_MSG_ERROR(Failed to find either an antlr binary or a suitable Java runtime for ANTLR.)
+      else
+        ANTLR="$JAVA -classpath $ANTLR_JAR antlr.Tool"
+      fi
+  fi
+  AC_SUBST(ANTLR)
+  AC_MSG_CHECKING([for antlr $1.$2.$3 or better])
+  antlr_version_str=`$ANTLR 2>&1 | head -n 1 | sed '/.*Version */!d; s///;q'`
+  if test "$antlr_version_str"; then
+    antlr_version_regex='s/\([[[:digit:]]]\+\)\.\([[[:digit:]]]\+\)\.\([[[:digit:]]]\+\).*$/'
+    antlr_version_major=`echo $antlr_version_str | sed "$antlr_version_regex\\1/"`
+    antlr_version_minor=`echo $antlr_version_str | sed "$antlr_version_regex\\2/"`
+    antlr_version_micro=`echo $antlr_version_str | sed "$antlr_version_regex\\3/"`
+    (test $antlr_version_major -gt $1 || \
+    (test $antlr_version_major -eq $1 && \
+     test $antlr_version_minor -gt $2) || \
+    (test $antlr_version_major -eq $1 && \
+     test $antlr_version_minor -eq $2 && \
+     test $antlr_version_micro -ge $3))
+  fi
+  AC_MSG_RESULT($antlr_version_major.$antlr_version_minor.$antlr_version_micro)
+])