2b6ee34cf6
This is needed so that setting LD/XLD is not ignored when linking with $CC
instead of directly using $LD. Currently only clang accepts an absolute
path for -fuse-ld= (Clang 12+ will add a new --ld-path flag), so we now
warn when building with GCC and $LD != "ld" since that might result in the
wrong linker being used.
We have been setting XLD=/path/to/cheri/ld.lld in CheriBSD for a long time and
used a similar version of this patch to avoid linking with /usr/bin/ld.
This change is also required when building FreeBSD on an Ubuntu with Clang:
In that case we set XCC=/usr/lib/llvm-10/bin/clang and since
/usr/lib/llvm-10/bin/ does not contain a "ld" binary the build fails with
`clang: error: unable to execute command: Executable "ld" doesn't exist!`
unless we pass -fuse-ld=/usr/lib/llvm-10/bin/ld.lld.
This change passes -fuse-ld instead of copying ${XLD} to WOLRDTMP/bin/ld
since then we would have to ensure that this file does not exist while
building the bootstrap tools. The cross-linker might not be compatible with
the host linker (e.g. when building on macos: host-linker= Mach-O /usr/bin/ld,
cross-linker=LLVM ld.lld).
Reviewed By: brooks, emaste
Differential Revision: https://reviews.freebsd.org/D26055
88 lines
2.7 KiB
Makefile
88 lines
2.7 KiB
Makefile
# $FreeBSD$
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.if ${MACHINE_CPUARCH} == "amd64"
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SFX= 32
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CFLAGS+=-DCOMPAT_FREEBSD32 -DCOMPAT_LINUX32
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.endif
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.PATH: ${SRCTOP}/sys/compat/linux ${SRCTOP}/sys/${MACHINE_CPUARCH}/linux${SFX}
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VDSO= linux${SFX}_vdso
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KMOD= linux
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SRCS= linux_fork.c linux${SFX}_dummy.c linux_file.c linux_event.c \
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linux_futex.c linux_getcwd.c linux_ioctl.c linux_ipc.c \
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linux${SFX}_machdep.c linux_misc.c linux_signal.c \
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linux_socket.c linux_stats.c linux_sysctl.c linux${SFX}_sysent.c \
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linux${SFX}_sysvec.c linux_uid16.c linux_time.c \
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linux_timer.c linux_vdso.c \
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opt_inet6.h opt_compat.h opt_posix.h opt_usb.h vnode_if.h \
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device_if.h bus_if.h
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.if ${MACHINE_CPUARCH} == "amd64"
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SRCS+= linux${SFX}_support.s
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.else
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SRCS+= linux_copyout.c
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.endif
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DPSRCS= assym.inc linux${SFX}_genassym.c
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# XXX: for assym.inc
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SRCS+= opt_kstack_pages.h opt_nfs.h opt_hwpmc_hooks.h
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.if ${MACHINE_CPUARCH} == "i386"
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SRCS+= opt_apic.h
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.endif
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OBJS= ${VDSO}.so
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.if ${MACHINE_CPUARCH} == "i386"
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SRCS+= linux_ptrace.c imgact_linux.c linux_util.c linux_mib.c linux_mmap.c \
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linux_emul.c linux_errno.c opt_cpu.h linux.c
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.endif
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.if ${MACHINE_CPUARCH} == "i386"
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EXPORT_SYMS=
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EXPORT_SYMS+= linux_emul_path
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EXPORT_SYMS+= linux_get_osname
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EXPORT_SYMS+= linux_get_osrelease
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EXPORT_SYMS+= linux_ioctl_register_handler
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EXPORT_SYMS+= linux_ioctl_unregister_handler
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.endif
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CLEANFILES= linux${SFX}_assym.h linux${SFX}_genassym.o linux${SFX}_locore.o \
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genassym.o
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linux${SFX}_assym.h: linux${SFX}_genassym.o
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sh ${SYSDIR}/kern/genassym.sh linux${SFX}_genassym.o > ${.TARGET}
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linux${SFX}_locore.o: linux${SFX}_assym.h assym.inc
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${CC} ${CCLDFLAGS} -x assembler-with-cpp -DLOCORE -m32 -shared -s \
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-pipe -I. -I${SYSDIR} ${WERROR} -Wall -fno-common -nostdinc -nostdlib \
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-fno-omit-frame-pointer -fPIC \
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-Wl,-T${SRCTOP}/sys/${MACHINE_CPUARCH}/linux${SFX}/${VDSO}.lds.s \
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-Wl,-soname=${VDSO}.so.1,--eh-frame-hdr,-warn-common \
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${.IMPSRC} -o ${.TARGET}
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.if ${MACHINE_CPUARCH} == "amd64"
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linux${SFX}_support.o: linux${SFX}_assym.h assym.inc
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${CC} -c -x assembler-with-cpp -DLOCORE ${CFLAGS} \
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${.IMPSRC} -o ${.TARGET}
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${VDSO}.so: linux${SFX}_locore.o
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${OBJCOPY} --input-target binary --output-target elf64-x86-64-freebsd \
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--binary-architecture i386 linux${SFX}_locore.o ${.TARGET}
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${STRIPBIN} -N _binary_linux${SFX}_locore_o_size ${.TARGET}
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.else
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${VDSO}.so: linux${SFX}_locore.o
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${OBJCOPY} --input-target binary --output-target elf32-i386-freebsd \
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--binary-architecture i386 linux${SFX}_locore.o ${.TARGET}
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${STRIPBIN} -N _binary_linux_locore_o_size ${.TARGET}
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.endif
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linux${SFX}_genassym.o: offset.inc
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${CC} -c ${CFLAGS:N-flto:N-fno-common} -fcommon ${.IMPSRC}
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.if !defined(KERNBUILDDIR)
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.warning Building Linuxulator outside of a kernel does not make sense
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.endif
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.include <bsd.kmod.mk>
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