e3e21edb19
This causes some increase of the dynamic linker size, but benefits of avoiding compiling private copy or the linker when debugging is required. definitely worth it. The dbg() calls can be compiled out by defining LD_NO_DEBUG symbol. Sponsored by: The FreeBSD Foundation MFC after: 1 week
119 lines
2.8 KiB
Makefile
119 lines
2.8 KiB
Makefile
# $FreeBSD$
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# Use the following command to build local debug version of dynamic
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# linker:
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# make DEBUG_FLAGS=-g WITHOUT_TESTS=yes all
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.include <src.opts.mk>
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PACKAGE= clibs
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MK_PIE= no # Always position independent using local rules
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MK_SSP= no
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CONFS= libmap.conf
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PROG?= ld-elf.so.1
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.if (${PROG:M*ld-elf32*} != "")
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TAGS+= lib32
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.endif
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SRCS= \
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rtld_start.S \
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reloc.c \
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rtld.c \
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rtld_lock.c \
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rtld_malloc.c \
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rtld_printf.c \
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map_object.c \
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xmalloc.c \
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debug.c \
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libmap.c
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MAN= rtld.1
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CSTD?= gnu99
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CFLAGS+= -Wall -DFREEBSD_ELF -DIN_RTLD -ffreestanding
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CFLAGS+= -I${SRCTOP}/lib/csu/common
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.if exists(${.CURDIR}/${MACHINE_ARCH})
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RTLD_ARCH= ${MACHINE_ARCH}
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.else
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RTLD_ARCH= ${MACHINE_CPUARCH}
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.endif
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CFLAGS+= -I${.CURDIR}/${RTLD_ARCH} -I${.CURDIR}
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.if ${MACHINE_ARCH} == "powerpc64"
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LDFLAGS+= -nostdlib -e _rtld_start
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.else
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LDFLAGS+= -nostdlib -e .rtld_start
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.endif
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NO_WCAST_ALIGN= yes
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WARNS?= 6
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INSTALLFLAGS= -C -b
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PRECIOUSPROG=
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BINDIR= /libexec
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SYMLINKS= ../..${BINDIR}/${PROG} ${LIBEXECDIR}/${PROG}
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MLINKS= rtld.1 ld-elf.so.1.1 \
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rtld.1 ld.so.1
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.if ${MACHINE_CPUARCH} == "sparc64"
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CFLAGS+= -fPIC
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.else
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CFLAGS+= -fpic
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.endif
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CFLAGS+= -DPIC $(DEBUG)
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.if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
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CFLAGS+= -fvisibility=hidden
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.endif
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.if ${MACHINE_CPUARCH} == "mips"
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CFLAGS.reloc.c+=-fno-jump-tables
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.endif
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LDFLAGS+= -shared -Wl,-Bsymbolic -Wl,-z,defs
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LIBADD= c_nossp_pic
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.if ${MK_TOOLCHAIN} == "no"
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LDFLAGS+= -L${LIBCDIR}
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.endif
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.if ${MACHINE_CPUARCH} == "arm"
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# Some of the required math functions (div & mod) are implemented in
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# libcompiler_rt on ARM. The library also needs to be placed first to be
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# correctly linked. As some of the functions are used before we have
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# shared libraries.
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LIBADD+= compiler_rt
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.endif
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.if ${MK_SYMVER} == "yes"
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VERSION_DEF= ${LIBCSRCDIR}/Versions.def
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SYMBOL_MAPS= ${.CURDIR}/Symbol.map
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VERSION_MAP= Version.map
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LDFLAGS+= -Wl,--version-script=${VERSION_MAP}
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.if exists(${.CURDIR}/${RTLD_ARCH}/Symbol.map)
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SYMBOL_MAPS+= ${.CURDIR}/${RTLD_ARCH}/Symbol.map
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.endif
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.endif
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.sinclude "${.CURDIR}/${RTLD_ARCH}/Makefile.inc"
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# Since moving rtld-elf to /libexec, we need to create a symlink.
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# Fixup the existing binary that's there so we can symlink over it.
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beforeinstall:
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.if exists(${DESTDIR}/usr/libexec/${PROG}) && ${MK_STAGING} == "no"
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-chflags -h noschg ${DESTDIR}/usr/libexec/${PROG}
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.endif
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.PATH: ${.CURDIR}/${RTLD_ARCH}
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HAS_TESTS=
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SUBDIR.${MK_TESTS}+= tests
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.include <bsd.prog.mk>
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${PROG_FULL}: ${VERSION_MAP}
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.include <bsd.symver.mk>
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.if ${COMPILER_TYPE} == "gcc"
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# GCC warns about redeclarations even though they have __exported
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# and are therefore not identical to the ones from the system headers.
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CFLAGS+= -Wno-redundant-decls
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.if ${COMPILER_VERSION} < 40300
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# Silence -Wshadow false positives in ancient GCC
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CFLAGS+= -Wno-shadow
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.endif
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.endif
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