--- c-wrapper-0.6.1.orig/configure.ac
+++ c-wrapper-0.6.1/configure.ac
@@ -53,6 +53,7 @@
 
 dnl Check for libraries
 dnl Add your macro calls to check required libraries, if you have any.
+PKG_CHECK_MODULES([FFI], [libffi])
 
 dnl Platform-dependent configuration.
 AC_ARG_ENABLE(objc, [  --enable-objc           turn on Objective-C support])
--- c-wrapper-0.6.1.orig/src/Makefile.in
+++ c-wrapper-0.6.1/src/Makefile.in
@@ -20,9 +20,9 @@
 GAUCHE_PACKAGE = @GAUCHE_PACKAGE@
 INSTALL        = @GAUCHE_INSTALL@
 
-CPPFLAGS       = -I./libffi/include -DGAUCHE_API_0_8_8 @CPPFLAGS@
+CPPFLAGS       = -DGAUCHE_API_0_8_8 @FFI_CFLAGS@ @CPPFLAGS@
 LDFLAGS        = @LDFLAGS@
-LIBS           = libffi/.libs/libffi.a @LIBS@
+LIBS           = @FFI_LIBS@ @LIBS@
 
 YACC           = @YACC@
 
@@ -38,7 +38,7 @@
 SCMFILES  = 
 HEADERS   = 
 
-TARGET    = libffi/.libs/libffi.a $(ARCHFILES)
+TARGET    = $(ARCHFILES)
 GENERATED = libffi
 CONFIG_GENERATED = libffi/Makefile Makefile cwcompile