1# $FreeBSD$ 2 3# Use the following command to build local debug version of dynamic 4# linker: 5# make DEBUG_FLAGS=-g WITHOUT_TESTS=yes all 6 7RTLD_ELF_DIR:= ${.PARSEDIR} 8 9.include <src.opts.mk> 10PACKAGE= clibs 11MK_PIE= no # Always position independent using local rules 12MK_SSP= no 13 14CONFS= libmap.conf 15PROG?= ld-elf.so.1 16.if (${PROG:M*ld-elf32*} != "") 17TAGS+= lib32 18.endif 19SRCS= \ 20 rtld_start.S \ 21 reloc.c \ 22 rtld.c \ 23 rtld_lock.c \ 24 rtld_malloc.c \ 25 rtld_printf.c \ 26 map_object.c \ 27 xmalloc.c \ 28 debug.c \ 29 libmap.c 30MAN?= rtld.1 31CSTD?= gnu99 32CFLAGS+= -Wall -DFREEBSD_ELF -DIN_RTLD -ffreestanding 33CFLAGS+= -I${SRCTOP}/lib/csu/common 34.if exists(${RTLD_ELF_DIR}/${MACHINE_ARCH}) 35RTLD_ARCH= ${MACHINE_ARCH} 36.else 37RTLD_ARCH= ${MACHINE_CPUARCH} 38.endif 39CFLAGS+= -I${RTLD_ELF_DIR}/${RTLD_ARCH} -I${RTLD_ELF_DIR} 40.if ${MACHINE_ARCH} == "powerpc64" 41LDFLAGS+= -nostdlib -e _rtld_start 42.else 43LDFLAGS+= -nostdlib -e .rtld_start 44.endif 45 46NO_WCAST_ALIGN= yes 47WARNS?= 6 48INSTALLFLAGS= -C -b 49PRECIOUSPROG= 50BINDIR= /libexec 51SYMLINKS= ../..${BINDIR}/${PROG} ${LIBEXECDIR}/${PROG} 52MLINKS?= rtld.1 ld-elf.so.1.1 \ 53 rtld.1 ld.so.1 54 55.if ${MACHINE_CPUARCH} == "sparc64" 56CFLAGS+= -fPIC 57.else 58CFLAGS+= -fpic 59.endif 60CFLAGS+= -DPIC $(DEBUG) 61.if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386" 62CFLAGS+= -fvisibility=hidden 63.endif 64.if ${MACHINE_CPUARCH} == "mips" 65CFLAGS.reloc.c+=-fno-jump-tables 66.endif 67LDFLAGS+= -shared -Wl,-Bsymbolic -Wl,-z,defs 68# Pull in the dependencies that we use from libc 69.include "rtld-libc/Makefile.inc" 70.if ${MK_TOOLCHAIN} == "no" 71LDFLAGS+= -L${LIBCDIR} 72.endif 73 74.if ${MACHINE_CPUARCH} == "arm" 75# Some of the required math functions (div & mod) are implemented in 76# libcompiler_rt on ARM. The library also needs to be placed first to be 77# correctly linked. As some of the functions are used before we have 78# shared libraries. 79LIBADD+= compiler_rt 80.endif 81 82 83 84.if ${MK_SYMVER} == "yes" 85VERSION_DEF= ${LIBCSRCDIR}/Versions.def 86SYMBOL_MAPS= ${RTLD_ELF_DIR}/Symbol.map 87VERSION_MAP= Version.map 88LDFLAGS+= -Wl,--version-script=${VERSION_MAP} 89 90.if exists(${RTLD_ELF_DIR}/${RTLD_ARCH}/Symbol.map) 91SYMBOL_MAPS+= ${RTLD_ELF_DIR}/${RTLD_ARCH}/Symbol.map 92.endif 93.endif 94 95.sinclude "${RTLD_ELF_DIR}/${RTLD_ARCH}/Makefile.inc" 96 97# Since moving rtld-elf to /libexec, we need to create a symlink. 98# Fixup the existing binary that's there so we can symlink over it. 99beforeinstall: 100.if exists(${DESTDIR}/usr/libexec/${PROG}) && ${MK_STAGING} == "no" 101 -chflags -h noschg ${DESTDIR}/usr/libexec/${PROG} 102.endif 103 104.PATH: ${RTLD_ELF_DIR}/${RTLD_ARCH} 105 106.if ${.CURDIR} == ${RTLD_ELF_DIR} 107HAS_TESTS= 108SUBDIR.${MK_TESTS}+= tests 109.endif 110 111.include <bsd.prog.mk> 112${PROG_FULL}: ${VERSION_MAP} 113.include <bsd.symver.mk> 114 115.if ${COMPILER_TYPE} == "gcc" 116# GCC warns about redeclarations even though they have __exported 117# and are therefore not identical to the ones from the system headers. 118CFLAGS+= -Wno-redundant-decls 119.if ${COMPILER_VERSION} < 40300 120# Silence -Wshadow false positives in ancient GCC 121CFLAGS+= -Wno-shadow 122.endif 123.endif 124