config/antlr.m4

   1 ##
   2 # Check for ANTLR's antlr3 script.
   3 # Will set ANTLR to the location of the script.
   4 ##
   5 AC_DEFUN([AC_PROG_ANTLR], [
   6   AC_ARG_VAR([ANTLR],[location of the antlr3 script])
   7
   8   # Check the existence of the runantlr script
   9   if test "x$ANTLR" = "x"; then
  10     AC_PATH_PROG(ANTLR, [antlr3])
  11   else
  12     AC_MSG_CHECKING([antlr3 script ($ANTLR)])
  13     if test ! -e "$ANTLR"; then
  14       AC_MSG_RESULT([not found])
  15       unset ANTLR
  16     elif test ! -x "$ANTLR"; then
  17       AC_MSG_RESULT([not executable])
  18       unset ANTLR
  19     else
  20       AC_MSG_RESULT([OK])
  21     fi
  22   fi
  23   if test "x$ANTLR" = "x"; then
  24     AC_MSG_WARN(
  25 [No usable antlr3 script found. Make sure that the parser code has
  26 been generated already. To obtain ANTLR see <http://www.antlr.org/>.]
  27     )
  28   fi
  29 ])
  30
  31 ##
  32 # Check the existence of the ANTLR3 C runtime library and headers
  33 # Will set ANTLR_INCLUDES and ANTLR_LIBS to the location of the ANTLR
  34 # headers and library respectively
  35 ##
  36 AC_DEFUN([AC_LIB_ANTLR],[
  37   AC_ARG_VAR(ANTLR_HOME, [path to libantlr3c installation])
  38
  39   # Get the location of the ANTLR3 C includes and libraries
  40   AC_ARG_WITH(
  41     [antlr-dir],
  42     AS_HELP_STRING(
  43       [--with-antlr-dir=PATH],
  44       [path to ANTLR C headers and libraries]
  45     ),
  46     ANTLR_PREFIXES="$withval",
  47     ANTLR_PREFIXES="$ANTLR_HOME /usr/local /usr /opt/local /opt"
  48   )
  49
  50   AC_MSG_CHECKING(for ANTLR3 C runtime library)
  51
  52   # Use C and remember the variables we are changing
  53   AC_LANG_PUSH(C)
  54   OLD_CPPFLAGS="$CPPFLAGS"
  55   OLD_LIBS="$LIBS"
  56
  57   # Try all the includes/libs set in ANTLR_PREFIXES
  58   for antlr_prefix in $ANTLR_PREFIXES
  59   do
  60     CPPFLAGS="$OLD_CPPFLAGS -I$antlr_prefix/include"
  61     LIBS="$OLD_LIBS -L$antlr_prefix/lib -lantlr3c"
  62     AC_LINK_IFELSE(
  63       [
  64         #include <antlr3.h>
  65
  66         int main() {
  67           pANTLR3_UINT8 fName = (pANTLR3_UINT8)"foo";
  68           pANTLR3_INPUT_STREAM input = antlr3AsciiFileStreamNew(fName);
  69           return 0;
  70         }
  71       ],
  72       [
  73         AC_MSG_RESULT(found in $antlr_prefix)
  74         ANTLR_INCLUDES="-I$antlr_prefix/include"
  75         ANTLR_LDFLAGS="-L$antlr_prefix/lib -lantlr3c"
  76         break
  77       ],
  78           [
  79             AC_MSG_RESULT(no)
  80             AC_MSG_ERROR([ANTLR3 C runtime not found, see <http://www.antlr.org/>])
  81           ]
  82     )
  83   done
  84
  85   # Return the old compile variables and pop the language.
  86   LIBS="$OLD_LIBS"
  87   CPPFLAGS="$OLD_CPPFLAGS"
  88   AC_LANG_POP()
  89
  90   # Define the ANTLR include/libs variables
  91   AC_SUBST(ANTLR_INCLUDES)
  92   AC_SUBST(ANTLR_LDFLAGS)
  93 ])