diff -Nru orig/clpAPI/src/Makevars.ucrt patched/clpAPI/src/Makevars.ucrt
--- orig/clpAPI/src/Makevars.ucrt	1970-01-01 01:00:00.000000000 +0100
+++ patched/clpAPI/src/Makevars.ucrt	2021-02-17 19:45:39.833490300 +0100
@@ -0,0 +1,2 @@
+PKG_CPPFLAGS=-g -D_R_=1 -DUSE_R=1 -I${R_TOOLS_SOFT}/include/coin
+PKG_LIBS=-lClp -lCoinUtils -lstdc++ -lz -lbz2 $(BLAS_LIBS) $(LAPACK_LIBS)