a4330302f2
Alter bsd.compat.mk to set MACHINE and MACHINE_ARCH when included directly so MD paths in Makefiles work. In the process centralize setting them in LIBCOMPATWMAKEENV. Alter .PATH and CFLAGS settings in work when the Makefile is included. While here only support LIB32 on supported platforms rather than always enabling it and requiring users of MK_LIB32 to filter based TARGET/MACHINE_ARCH. The net effect of this change is to make Makefile.libcompat only build compatability libraries. Changes relative to r354449: Correct detection of the compiler type when bsd.compat.mk is used outside Makefile.libcompat. Previously it always matched the clang case. Set LDFLAGS including the linker emulation for mips where -m32 seems to be insufficent. Reviewed by: imp, kib (origional version in r354449) Obtained from: CheriBSD (conceptually) Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D22251
124 lines
2.9 KiB
Makefile
124 lines
2.9 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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RTLD_ELF_DIR:= ${.PARSEDIR}
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.include <src.opts.mk>
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PACKAGE= clibs
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MK_PIE= no # Always position independent using local rules
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MK_SSP= no
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CONFS= libmap.conf
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PROG?= ld-elf.so.1
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.if (${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${SRCTOP}/lib/csu/common
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.if exists(${RTLD_ELF_DIR}/${MACHINE_ARCH})
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RTLD_ARCH= ${MACHINE_ARCH}
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.else
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RTLD_ARCH= ${MACHINE_CPUARCH}
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.endif
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CFLAGS+= -I${RTLD_ELF_DIR}/${RTLD_ARCH} -I${RTLD_ELF_DIR}
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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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# Pull in the dependencies that we use from libc
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.include "rtld-libc/Makefile.inc"
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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= ${RTLD_ELF_DIR}/Symbol.map
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VERSION_MAP= Version.map
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LDFLAGS+= -Wl,--version-script=${VERSION_MAP}
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.if exists(${RTLD_ELF_DIR}/${RTLD_ARCH}/Symbol.map)
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SYMBOL_MAPS+= ${RTLD_ELF_DIR}/${RTLD_ARCH}/Symbol.map
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.endif
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.endif
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.sinclude "${RTLD_ELF_DIR}/${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: ${RTLD_ELF_DIR}/${RTLD_ARCH}
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.if ${.CURDIR} == ${RTLD_ELF_DIR}
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HAS_TESTS=
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SUBDIR.${MK_TESTS}+= tests
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.endif
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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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