--- configure.orig	2018-01-11 12:39:22 UTC
+++ configure
@@ -1003,35 +1003,35 @@ check_cc(){
     log check_cc "$@"
     cat > $TMPC
     log_file $TMPC
-    check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
+    check_cmd $cc $CPPFLAGS $CFLAGS -I${prefix}/include "$@" $CC_C $(cc_o $TMPO) $TMPC
 }
 
 check_cxx(){
     log check_cxx "$@"
     cat > $TMPCPP
     log_file $TMPCPP
-    check_cmd $cxx $CPPFLAGS $CXXFLAGS "$@" $CXX_C -o $TMPO $TMPCPP
+    check_cmd $cxx $CPPFLAGS $CXXFLAGS -I${prefix}/include "$@" $CXX_C -o $TMPO $TMPCPP
 }
 
 check_ecxx(){
     log check_cxx "$@"
     cat > $TMPCPP
     log_file $TMPCPP
-    check_cmd $cxx $CPPFLAGS $CXXFLAGS $ECXXFLAGS "$@" $CXX_C -o $TMPO $TMPCPP
+    check_cmd $cxx $CPPFLAGS $CXXFLAGS $ECXXFLAGS -I${prefix}/include "$@" $CXX_C -o $TMPO $TMPCPP
 }
 
 check_objcc(){
     log check_objcc "$@"
     cat > $TMPM
     log_file $TMPM
-    check_cmd $objcc -Werror=missing-prototypes $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPM
+    check_cmd $objcc -Werror=missing-prototypes $CPPFLAGS $CFLAGS $OBJCFLAGS -I${prefix}/include "$@" $OBJCC_C $(cc_o $TMPO) $TMPM
 }
 
 check_cpp(){
     log check_cpp "$@"
     cat > $TMPC
     log_file $TMPC
-    check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
+    check_cmd $cc $CPPFLAGS $CFLAGS -I${prefix}/include "$@" $(cc_e $TMPO) $TMPC
 }
 
 as_o(){