Remove -mlong-calls vhen building arm libraries and llvm.

Clang from 9.0.0 onwards already has the necessary relocation range
extenders, so this workaround is no longer needed (it produces longer
and slower code). Tested on real hardware, and in cross-compile
environment.

Submitted by:	mmel

lib/clang/llvm.build.mk

@@ -110,8 +110,3 @@ CXXSTD?=	c++14
 CXXFLAGS+=	-fno-exceptions
 CXXFLAGS+=	-fno-rtti
 CXXFLAGS.clang+= -stdlib=libc++
-
-.if ${MACHINE_CPUARCH} == "arm"
-STATIC_CFLAGS+= -mlong-calls
-STATIC_CXXFLAGS+= -mlong-calls
-.endif

lib/csu/arm/Makefile

@@ -8,7 +8,6 @@ OBJS+=		Scrt1.o gcrt1.o
 CFLAGS+=	-I${.CURDIR:H}/common \
 		-I${SRCTOP}/lib/libc/include
 CFLAGS+=	-DCRT_IRELOC_SUPPRESS
-STATIC_CFLAGS+=	-mlong-calls
 
 FILES=		${OBJS}
 FILESMODE=	${LIBMODE}

lib/libc++/Makefile

@@ -7,9 +7,6 @@ _LIBCXXRTDIR=	${SRCTOP}/contrib/libcxxrt
 HDRDIR=		${SRCTOP}/contrib/llvm-project/libcxx/include
 SRCDIR=		${SRCTOP}/contrib/llvm-project/libcxx/src
 CXXINCLUDEDIR=	${INCLUDEDIR}/c++/v${SHLIB_MAJOR}
-.if ${MACHINE_CPUARCH} == "arm"
-STATIC_CXXFLAGS+= -mlong-calls
-.endif
 
 .PATH: ${SRCDIR}
 

usr.bin/clang/clang/Makefile

@@ -13,9 +13,6 @@ SRCS+=		driver.cpp
 .if ${MK_SHARED_TOOLCHAIN} == "no"
 NO_SHARED?= yes
 
-.if ${MACHINE_CPUARCH} == "arm"
-CFLAGS+= -mlong-calls
-.endif
 .endif
 
 LINKS=	${BINDIR}/clang ${BINDIR}/clang++ \