RAI: fix string interpolation on OPENBLAS_BUILD_OPTS

Author: d-netto

deps/openblas.mk

@@ -44,7 +44,7 @@ OPENBLAS_CFLAGS := -O2
 
 # Decide whether to build for 32-bit or 64-bit arch
 ifneq ($(XC_HOST),)
-OPENBLAS_BUILD_OPTS += OSNAME=$(OS) CROSS=1 HOSTCC=$(HOSTCC) CROSS_SUFFIX=$(CROSS_COMPILE)
+OPENBLAS_BUILD_OPTS += OSNAME=$(OS) CROSS=1 HOSTCC="$(HOSTCC)" CROSS_SUFFIX=$(CROSS_COMPILE)
 endif
 ifeq ($(OS),WINNT)
 ifneq ($(ARCH),x86_64)