1 files changed, 56 insertions, 0 deletions

diff --git a/m4/ac_pkg_cython.m4 b/m4/ac_pkg_cython.m4
new file mode 100644
index 0000000..aeae6a0
--- /dev/null
+++ b/m4/ac_pkg_cython.m4
@@ -0,0 +1,56 @@
+
+AC_DEFUN([AC_PROG_CYTHON],[
+        AC_PATH_PROG([CYTHON],[cython])
+        if test -z "$CYTHON" ; then
+                AC_MSG_WARN([cannot find 'cython' program. You should look at http://www.cython.org] or install your distribution specific cython package.)
+                CYTHON=false
+        elif test -n "$1" ; then
+                AC_MSG_CHECKING([for Cython version])
+                [cython_version=`$CYTHON --version 2>&1 | grep 'Cython version' | sed 's/.*\([0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\).*/\1/g'`]
+                AC_MSG_RESULT([$cython_version])
+                if test -n "$cython_version" ; then
+                        # Calculate the required version number components
+                        [required=$1]
+                        [required_major=`echo $required | sed 's/[^0-9].*//'`]
+                        if test -z "$required_major" ; then
+                                [required_major=0]
+                        fi
+                        [required=`echo $required | sed 's/[0-9]*[^0-9]//'`]
+                        [required_minor=`echo $required | sed 's/[^0-9].*//'`]
+                        if test -z "$required_minor" ; then
+                                [required_minor=0]
+                        fi
+                        [required=`echo $required | sed 's/[0-9]*[^0-9]//'`]
+                        [required_patch=`echo $required | sed 's/[^0-9].*//'`]
+                        if test -z "$required_patch" ; then
+                                [required_patch=0]
+                        fi
+                        # Calculate the available version number components
+                        [available=$cython_version]
+                        [available_major=`echo $available | sed 's/[^0-9].*//'`]
+                        if test -z "$available_major" ; then
+                                [available_major=0]
+                        fi
+                        [available=`echo $available | sed 's/[0-9]*[^0-9]//'`]
+                        [available_minor=`echo $available | sed 's/[^0-9].*//'`]
+                        if test -z "$available_minor" ; then
+                                [available_minor=0]
+                        fi
+                        [available=`echo $available | sed 's/[0-9]*[^0-9]//'`]
+                        [available_patch=`echo $available | sed 's/[^0-9].*//'`]
+                        if test -z "$available_patch" ; then
+                                [available_patch=0]
+                        fi
+                        if test $available_major -ne $required_major \
+                                -o $available_minor -ne $required_minor \
+                                -o $available_patch -lt $required_patch ; then
+                                AC_MSG_WARN([Cython version >= $1 is required.  You have $cython_version.  You should look at http://www.cython.org])
+                                CYTHON=false
+                        fi
+                else
+                        AC_MSG_WARN([cannot determine Cython version])
+                        CYTHON=false
+                fi
+        fi
+        AC_SUBST([CYTHON_LIB])
+])