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230 lines
8.4 KiB
Makefile
230 lines
8.4 KiB
Makefile
# Copyright (C) 1993-2021 Free Software Foundation, Inc.
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# This file is part of the GNU C Library.
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# The GNU C Library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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# The GNU C Library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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# You should have received a copy of the GNU Lesser General Public
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# License along with the GNU C Library; if not, see
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# <https://www.gnu.org/licenses/>.
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ifdef in-Makerules
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# Look for header files in hurd/ under the top-level library source directory.
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# Look for generated header files where they get created.
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includes += -I$(..)hurd -I$(common-objpfx)hurd/
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# We use the style `if (err = call(...))' a lot in the Hurd code,
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# where we have a lot of functions that return zero or an errno code.
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+cflags += -Wno-parentheses
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# Do not use any assembly code from sysdeps/unix (and subdirectories).
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# This bypasses all the system call stubs and uses any existing posix or
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# generic C files instead.
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inhibit-sysdep-asm += unix.*
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inhibit-unix-syscalls = yes
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# Don't try to generate anything from the installed Unix system and its
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# libraries. That is only of use when building for a Unix system, so as to
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# be compatible with some existing binaries for that system.
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inhibit-glue = yes
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ifeq (,$(filter mach hurd,$(subdir)))
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# Subdirectories other than hurd/ might use the generated Hurd headers.
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# So make sure we get a chance to run in hurd/ to make them before all else.
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# (But we don't want to do this in mach/, because hurd/ needs some things
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# there, and we know mach/ doesn't need anything from hurd/.)
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hurd-objpfx = $(common-objpfx)hurd/
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# These are all the generated headers that <hurd.h> includes.
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before-compile += $(patsubst %,$(hurd-objpfx)hurd/%.h,auth io fs process)
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$(patsubst %,$(hurd-objpfx)hurd/%.h,auth io fs process): hurd-before-compile
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.PHONY: hurd-before-compile
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hurd-before-compile: $(common-objpfx)mach/mach-shortcuts.h
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$(MAKE) -C $(..)hurd subdir=hurd before-compile no_deps=t
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endif
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# Hurd profil.c includes this file, so give a rule to make it.
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ifeq ($(subdir),gmon)
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$(common-objpfx)hurd/../mach/RPC_task_get_sampled_pcs.c:
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$(MAKE) -C $(..)mach subdir=mach before-compile no_deps=t
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endif
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# Generate bits/errno.h from the section of the manual that lists all the errno
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# codes.
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errno.texinfo = $(..)manual/errno.texi
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hurd = $(..)sysdeps/mach/hurd
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define mach-errno-h
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($(foreach h,mach/message.h \
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mach/kern_return.h \
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mach/mig_errors.h \
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device/device_types.h,\
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echo '#include <$h>';\
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))
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endef
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# We use the compiler to generate a list of absolute file names for
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# the headers we want to search for Mach error codes, listed above (and
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# incidentally, all other headers those include).
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-include $(common-objpfx)errnos.d
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$(common-objpfx)errnos.d: $(mach-errnos-deps)
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$(mach-errno-h) | \
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$(CC) $(CFLAGS) \
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$(subst -include $(common-objpfx)libc-modules.h,,$(CPPFLAGS)) \
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-M -x c - | \
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sed $(sed-remove-objpfx) -e 's,- *:,mach-errnos-deps :=,' \
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-e 's, \.\./, $(..),g' > $@t
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mv -f $@t $@
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$(hurd)/bits/errno.h: $(common-objpfx)stamp-errnos ;
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$(common-objpfx)stamp-errnos: $(hurd)/errnos.awk $(errno.texinfo) \
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$(mach-errnos-deps) $(common-objpfx)errnos.d
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mkdir -p $(hurd-objpfx)bits
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$(AWK) -f $^ > $(hurd-objpfx)bits/errno.h-tmp
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# Make it unwritable so noone will edit it by mistake.
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-chmod a-w $(hurd-objpfx)bits/errno.h-tmp
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$(move-if-change) $(hurd-objpfx)bits/errno.h-tmp $(hurd)/bits/errno.h
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touch $@
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common-generated += errnos.d stamp-errnos
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# We install the real libc.a as libcrt.a and as libc.a we install a linker
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# script which does -( -lcrt -lmachuser -lhurduser -).
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libc-name = crt
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ifeq (,$(subdir))
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install-others += $(inst_libdir)/libc.a
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$(inst_libdir)/libc.a: $(hurd)/libc-ldscript $(+force); $(do-install)
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ifeq (yes,$(build-profile))
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install-others += $(inst_libdir)/libc_p.a
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$(inst_libdir)/libc_p.a: $(hurd)/libc_p-ldscript $(+force); $(do-install)
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endif
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endif
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# Make sure these are used to build the libc.so shared object too. There
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# is a circular dependency between each of these shared objects and libc
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# (many high-level libc functions call stubs, stubs call low-level libc
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# functions like memcpy and mach_msg). This works out fine at run time
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# (all the objects are loaded before resolving their symbols, so these
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# interdependencies are fine). But to create the shared objects we must
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# link them one at a time; since each needs one or both of the others to
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# produce its DT_NEEDED entries and to assign its undefined symbols the
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# right symbol versions, we can't do any of them before the others! To
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# get around this, we link each lib*user.so shared object twice. First,
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# we link an object without reference to libc.so (since we haven't linked
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# libc.so yet), so it lacks a DT_NEEDED record for the libc soname it
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# depends on, and its undefined symbol references lack the symbol version
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# assignments they should have. We will use this shared object solely to
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# link libc.so against it; that gives libc.so the proper DT_NEEDED record,
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# and symbol versions assignments (if the lib*user.so object is using them).
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# Finally we link a second version of the same lib*user.so shared object,
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# this time linked normally against libc so it gets a proper DT_NEEDED
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# record and symbol version set; this one can be installed for run-time use.
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rpcuserlibs := $(common-objpfx)mach/libmachuser.so \
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$(common-objpfx)hurd/libhurduser.so
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link-rpcuserlibs := $(rpcuserlibs:%user.so=%user-link.so)
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$(common-objpfx)libc.so: $(link-rpcuserlibs)
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$(common-objpfx)linkobj/libc.so: $(link-rpcuserlibs)
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rpath-dirs += mach hurd
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# Make sure the `lib' pass builds the dummy shared objects so
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# we can link libc against them.
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ifeq (mach,$(subdir))
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lib-noranlib: $(common-objpfx)mach/libmachuser-link.so
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endif
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ifeq (hurd,$(subdir))
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lib-noranlib: $(common-objpfx)hurd/libhurduser-link.so
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endif
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$(link-rpcuserlibs): %-link.so: %_pic.a
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# These shared objects are just for the purpose of linking libc,
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# so they don't need abi-note.o linked into them.
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$(build-shlib-helper) \
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-nostdlib -o $@ \
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-Wl,-soname=$(*F).so$($(*F).so-version) \
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$(build-shlib-objlist)
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libmachuser-link.so-no-z-defs = yes
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libhurduser-link.so-no-z-defs = yes
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# And get them into the libc.so ldscript.
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$(inst_libdir)/libc.so: $(rpcuserlibs)
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# The RPC stubs from these libraries are needed in building the dynamic
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# linker, too. It must be self-contained, so we link the needed PIC
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# objects directly into the shared object.
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ifeq (elf,$(subdir))
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$(objpfx)librtld.map: $(rpcuserlibs:.so=_pic.a)
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CFLAGS-dl-load.c = -DEXTERNAL_MAP_FROM_FD
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endif
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# Override the generic Makeconfig values so we link against the RPC libs.
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link-libc-static := -Wl,--start-group \
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$(patsubst %,$(common-objpfx)%.a,\
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libc mach/libmachuser hurd/libhurduser) \
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$(static-gnulib) -Wl,--end-group
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link-libc-static-tests := -Wl,--start-group \
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$(patsubst %,$(common-objpfx)%.a,\
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libc mach/libmachuser hurd/libhurduser) \
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$(static-gnulib-tests) -Wl,--end-group
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ifeq ($(subdir),csu)
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extra-objs += static-start.o
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# We need special startup code for statically linked binaries.
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$(objpfx)crt0.o: $(objpfx)static-start.o $(objpfx)abi-note.o $(objpfx)init.o $(objpfx)static-reloc.o
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$(link-relocatable)
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$(objpfx)rcrt0.o: $(objpfx)static-start.o $(objpfx)abi-note.o $(objpfx)init.o
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$(link-relocatable)
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endif
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ifeq (hurd, $(subdir))
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sysdep_routines += cthreads
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endif
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ifeq (io, $(subdir))
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sysdep_routines += f_setlk close_nocancel close_nocancel_nostatus \
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fcntl_nocancel open_nocancel openat_nocancel read_nocancel \
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pread64_nocancel write_nocancel pwrite64_nocancel \
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wait4_nocancel \
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xstat fxstat lxstat xstat64 fxstat64 lxstat64 \
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xmknod xmknodat \
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fxstatat fxstatat64
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endif
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ifeq (misc, $(subdir))
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sysdep_routines += writev_nocancel writev_nocancel_nostatus mremap
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endif
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ifeq ($(subdir),sunrpc)
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sysdep_headers += nfs/nfs.h
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endif
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ifeq ($(subdir),socket)
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sysdep_headers += net/ethernet.h net/if_arp.h net/if_ether.h net/route.h
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endif
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ifeq ($(subdir),nis)
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CFLAGS-ypclnt.c += -DUSE_BINDINGDIR=1
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endif
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LDLIBS-pthread.so += $(objdir)/hurd/libhurduser.so
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LDLIBS-c_malloc_debug.so += $(link-rpcuserlibs)
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endif # in-Makerules
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