kernels: add compilation flags for wasm mpi

Author: csegarragonz

common/MPI.defs

@@ -7,7 +7,11 @@ endif
 CCOMPILER=$(MPICC)
 CLINKER=$(CCOMPILER)
 COMOBJS=MPI_bail_out.o wtime.o
-PROG_ENV=-DMPI
+ifeq ($(FAASM_WASM),on)
+    PROG_ENV = $(WASM_CFLAGS_NO_QUOTES) -DMPI
+else
+    PROG_ENV = -DMPI
+endif
 
 ifeq ($(FAASM_WASM),on)
     LIBS    = ${FAASM_SYSROOT}/lib/wasm32-wasi/libfaasmpi.a \