pkg/relifx: fix compilation with clang

pkg/relic/Makefile

@@ -15,6 +15,11 @@ CFLAGS += -Wno-unused-function -Wno-old-style-definition -Wno-unused-parameter \
           -Wno-pedantic -Wno-array-parameter -Wno-unused-but-set-variable \
           -Wno-stringop-overflow
 
+ifeq (llvm,$(TOOLCHAIN))
+  CFLAGS += $(GCC_C_INCLUDES)
+  CXXFLAGS += $(GCC_CXX_INCLUDES)
+endif
+
 TOOLCHAIN_FILE = $(PKG_SOURCE_DIR)/xcompile-toolchain.cmake
 
 all: $(BINDIR)/$(PKG_NAME).a

pkg/relic/Makefile.include

@@ -1,10 +1,3 @@
 INCLUDES += -I$(PKGDIRBASE)/relic/include
 INCLUDES += -I$(BINDIR)/pkg-build/relic/include
 ARCHIVES += $(BINDIR)/relic.a
-
-ifneq (,$(filter cortex-m%,$(CPU_CORE)))
-  # relic package package is not using system includes right now, so
-  # many newlib headers (not even stdio.h) are not found.
-  # Fixed in #9821 for jerryscript, should be applicable here too.
-  TOOLCHAINS_BLACKLIST += llvm
-endif