Index: lib/clang/llvm.build.mk
===================================================================
--- lib/clang/llvm.build.mk
+++ lib/clang/llvm.build.mk
@@ -46,5 +46,6 @@
 CXXFLAGS.clang+= -stdlib=libc++
 
 .if ${MACHINE_CPUARCH} == "arm"
+STATIC_CFLAGS+= -mlong-calls
 STATIC_CXXFLAGS+= -mlong-calls
 .endif