diff -Nurd /home/sledz/jamvm-1.4.5.orig/configure.ac jamvm-1.4.5/configure.ac
--- /home/sledz/jamvm-1.4.5.orig/configure.ac	2012-10-02 15:14:03.000000000 +0200
+++ jamvm-1.4.5/configure.ac	2012-10-02 15:14:49.000000000 +0200
@@ -166,10 +166,25 @@
         enable_zip=no
     fi])
 
-AC_CHECK_LIB(ffi,ffi_call,,
-    [if test "$enable_ffi" != no; then
-        AC_MSG_ERROR(cannot find libffi)
-    fi])
+LIBFFI_FOUND=no
+if test "$enable_ffi" = yes
+then
+PKG_CHECK_MODULES([LIBFFI], [libffi], [LIBFFI_FOUND=yes], [LIBFFI_FOUND=no])
+if test "x${LIBFFI_FOUND}" = xno
+then
+  LIBFFI_FOUND=
+  AC_CHECK_HEADER([ffi.h],[LIBFFI_CFLAGS=],[LIBFFI_FOUND=no])
+  AC_SEARCH_LIBS([ffi_call], [ffi],[LIBFFI_LIBS=-lffi],[LIBFFI_FOUND=no])
+  if test "x${LIBFFI_FOUND}" = xno
+    then
+      AC_MSG_ERROR([Could not find libffi headers - \
+      Instal libffi-devel or libffi-dev.])
+ fi
+fi
+fi
+AC_SUBST(LIBFFI_CFLAGS)
+AC_SUBST(LIBFFI_LIBS)
+
 
 dnl Checks for header files.
 AC_HEADER_STDC
@@ -180,11 +195,6 @@
         enable_zip=no
     fi])
 
-AC_CHECK_HEADER(ffi.h,,
-    [if test "$enable_ffi" != no; then
-        AC_MSG_ERROR(cannot find ffi.h)
-    fi])
-
 if test "$enable_zip" != no; then
     AC_DEFINE([USE_ZIP],1,[use zip])
     use_zip_yes=
@@ -197,7 +207,7 @@
 AC_SUBST(use_zip_yes)
 AC_SUBST(use_zip_no)
 
-if test "$enable_ffi" != no; then
+if test "x${LIBFFI_FOUND}" != no; then
     AC_DEFINE([USE_FFI],1,[use FFI])
 fi
 
diff -Nurd /home/sledz/jamvm-1.4.5.orig/src/Makefile.am jamvm-1.4.5/src/Makefile.am
--- /home/sledz/jamvm-1.4.5.orig/src/Makefile.am	2012-10-02 15:14:03.000000000 +0200
+++ jamvm-1.4.5/src/Makefile.am	2012-10-02 15:14:49.000000000 +0200
@@ -19,6 +19,7 @@
 
 jamvm_LDADD = libcore.la
 libjvm_la_LIBADD = libcore.la
-libcore_la_LIBADD = os/@os@/@arch@/libnative.la os/@os@/libos.la
+libcore_la_LIBADD = os/@os@/@arch@/libnative.la os/@os@/libos.la $(LIBFFI_LIBS)
+libcore_la_CPPFLAGS = $(LIBFFI_CFLAGS)
 
 DISTCLEANFILES = arch.h