configure.ac: check for the fontforge program

We'll need this to convert our sfd source files to woff2 webfonts.

diff --git a/configure.ac b/configure.ac
index b9b35c7d0c138a22f56a5fc3e3bd99f63efb8f8f..776c2b45f9a82571a1597736b7b59eb26edf6e9f 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -11,6 +11,12 @@ AC_PATH_PROG(
   [AC_MSG_ERROR([base64 program not found])]
 )
 
+AC_PATH_PROG(
+  [FONTFORGE],
+  [fontforge],
+  [AC_MSG_ERROR([fontforge program not found])]
+)
+
 AC_PATH_PROG(
   [SCOUR],
   [scour],