new swig build system. much better. yay.

1 files changed, 90 insertions, 0 deletions

diff --git a/m4/swig.m4 b/m4/swig.m4
new file mode 100644
index 00000000..ad6d1393
--- /dev/null
+++ b/m4/swig.m4
@@ -0,0 +1,90 @@
+# SWIG_PROG([required-version])
+#
+# Checks for the SWIG program.  If found you can (and should) call SWIG via $(SWIG).
+# You can use the optional first argument to check if the version of the available SWIG
+# is greater or equal to the value of the argument.  It should have the format:
+# N[.N[.N]] (N is a number between 0 and 999.  Only the first N is mandatory.)
+AC_DEFUN([SWIG_PROG],[
+	AC_REQUIRE([AC_PROG_MAKE_SET])
+	AC_CHECK_PROG(SWIG,swig,[`which swig`])
+	if test -z "$SWIG" ; then
+		AC_MSG_WARN([cannot find 'swig' program])
+		SWIG=false
+	elif test -n "$1" ; then
+		AC_MSG_CHECKING([for SWIG version])
+		swig_version=`$SWIG -version 2>&1 | \
+			awk '/^SWIG Version [[0-9]+\.[0-9]+\.[0-9]]+.*$/ { split($[3],a,"[[^.0-9]]"); print a[[1]] }'`
+		AC_MSG_RESULT([$swig_version])
+		if test -n "$swig_version" ; then
+			swig_version=`echo $swig_version | \
+				awk '{ split($[1],a,"\."); print [a[1]*1000000+a[2]*1000+a[3]] }' 2>/dev/null`
+			swig_required_version=`echo $1 | \
+				awk '{ split($[1],a,"\."); print [a[1]*1000000+a[2]*1000+a[3]] }' 2>/dev/null`
+			if test $swig_required_version -gt $swig_version ; then
+				AC_MSG_WARN([SWIG version $1 required])
+			fi
+		else
+			AC_MSG_WARN([cannot determine SWIG version])
+		fi
+	fi
+])
+
+# SWIG_ENABLE_CXX()
+#
+# Enable swig C++ support.  This effects all invocations of $(SWIG).
+AC_DEFUN([SWIG_ENABLE_CXX],[
+	AC_REQUIRE([SWIG_PROG])
+	AC_REQUIRE([AC_PROG_CXX])
+	if test "$SWIG" != "false" ; then
+		SWIG="$SWIG -c++"
+	fi
+])
+
+# SWIG_MULTI_MODULE_SUPPORT()
+#
+# Enable support for multiple modules.  This effects all invocations of $(SWIG).
+# You have to link all generated modules against the appropriate SWIG library.
+# If you want to build Python modules for example, use the SWIG_PYTHON() macro
+# and link the modules against $(SWIG_PYTHON_LIB).  The $(SWIG_LDFLAGS) variable
+# can be used to help the linker to find this library.
+AC_DEFUN([SWIG_MULTI_MODULE_SUPPORT],[
+	AC_REQUIRE([SWIG_PROG])
+	if test "$SWIG" != "false" ; then
+		SWIG="$SWIG -c"
+        
+		# Check for SWIG library path
+		AC_MSG_CHECKING([for SWIG library path])
+		swig_path=${SWIG%/bin*}/lib
+		swig_path=`find $swig_path -type f -name libswig*.a -o -name libswig*.so -print`
+		for i in $swig_path ; do
+			swig_path=${i%/libswig*}
+			break
+		done
+		AC_MSG_RESULT([$swig_path])
+		if test -n "$swig_path" ; then
+			AC_SUBST(SWIG_LDFLAGS,[-L$swig_path])
+		else
+			AC_MSG_WARN([cannot find SWIG library path])
+		fi
+	fi
+])
+
+# SWIG_PYTHON([use-shadow-classes])
+#
+# Checks for Python and provides the $(SWIG_PYTHON_CFLAGS), $(SWIG_PYTHON_LIB) and
+# $(SWIG_PYTHON_OPT) output variables.  $(SWIG_PYTHON_OPT) contains all necessary swig
+# options to generate code for Python.  Shadow classes are enabled unless the
+# value of the optional first argument is exactly 'no'.  If you need multi module
+# support use $(SWIG_PYTHON_LIB) (provided by the SWIG_MULTI_MODULE_SUPPORT() macro)
+# to link against the appropriate library.  It contains the SWIG Python runtime library
+# that is needed by the type check system for example.
+AC_DEFUN([SWIG_PYTHON],[
+	AC_REQUIRE([SWIG_PROG])
+	AC_REQUIRE([PYTHON_DEVEL])
+	if test "$SWIG" != "false" ; then
+		AC_SUBST(SWIG_PYTHON_LIB,[`$SWIG -python -ldflags`])
+		test ! "x$1" = "xno" && swig_shadow=" -shadow" || swig_shadow=""
+		AC_SUBST(SWIG_PYTHON_OPT,[-python$swig_shadow])
+	fi
+	AC_SUBST(SWIG_PYTHON_CFLAGS,[$PYTHON_CFLAGS])
+])