Tue Nov 7 12:29:46 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>

	* elf/linux-compat.c: New file.
	* elf/Makefile (distribute): Add linux-compat.c.
	(generated): Add librtld.so.
	[$(config-os)=linux*] (extra-objs): Add linux-compat.so.
	[$(config-os)=linux*] (extra-objs): Add ld-linux.so.1.
	(librtld.so): New target.
	(ld.so, ld-linux.so.1): Make from librtld.so.

	* elf/rtld.c (dl_main): Instead of weak call to _dl_compat_init,
	call our own DT_INIT if we have one (and then clear it).
	(__dgettext): New weak function.

	* intl/localealias.c (read_alias_file): Avoid sprintf; use memcpy
	by hand instead.

	* sysdeps/generic/_strerror.c (_strerror_internal): Use _itoa
	instead of snprintf.

	* sysdeps/mach/_strerror.c (_strerror_internal): Don't write
	BUF[BUFLEN].

	* elf/rtld.c (rtld_map): New static variable.
	(_dl_start): Use a differently named local BOOTSTRAP_MAP for the
	bootstrapping.  Then copy data into `rtld_map'.
	(dl_main): Finish filling in rtld_map and link it into the chain,
	instead of allocating a new structure.
	(dl_main): Call _dl_compat_init if it is defined (use weak ref).

	* elf/dlsym.c: Fix last change: move REF out of `doit'.


	control.
	using it.

	and cwdir ports.
	functions.
	these.
	$(libdir)(rtld-installed-name).

	leading zeroes.

	in the rhs.
	pattern rule.


	never know.
	(fork): Use symbol_set_* macros for _hurd_fork_locks.
	* sysdeps/unix/sysv/sysv4/linux/i386/sysdep.S (__syscall_error):
 	instead of unix/sysv.

	-dynamic-linker.

	(__printf_fp): Last arg ARGS is now `const void **const';

	locale/C-ctype.c.
	* sysdeps/mach/hurd/sigsuspend.c: Likewise.
	* sysdeps/mach/hurd/mips/sigreturn.c: Likewise.
	alias gethostname.
	setitmr
	setpgrp
	(_S_msg_get_exec_flags, _S_msg_set_exec_flags,
	(abort_thread, abort_rpcs): Take same new arg and pass it through.

1 files changed, 23 insertions, 5 deletions

diff --git a/elf/Makefile b/elf/Makefile
index 21d2fc5..314289b 100644
--- a/elf/Makefile
+++ b/elf/Makefile
@@ -31,24 +31,42 @@ libdl-inhibit-o	= $(filter-out .so,$(object-suffixes)) # Build only shared.
 rtld-routines	:= rtld $(addprefix dl-,load lookup object reloc	\
 				        runtime sysdep error init fini)
 distribute	= $(rtld-routines:=.c) dynamic-link.h do-rel.h \
-		  soinit.c sofini.c ldd.sh.in
+		  soinit.c sofini.c ldd.sh.in linux-compat.c
 
 include ../Makeconfig
 
 ifeq (yes,$(build-shared))
 extra-objs	= $(rtld-routines:=.so) soinit.so sofini.so
+generated	= librtld.so
 install-others	= $(libdir)/$(rtld-installed-name)
 install-bin	= ldd
+
+ifneq (,$(filter linux%,$(config-os)))
+extra-objs	+= linux-compat.so
+install-lib	+= ld-linux.so.1
+endif
 endif
 
 include ../Rules
 
-$(objpfx)ld.so: $(rtld-routines:%=$(objpfx)%.so) \
-		$(patsubst %,$(common-objpfx)lib%_pic.a,\
-			   elf c $(LDLIBS-c.so:-l%=%))
-	$(LINK.o) -nostdlib -nostartfiles -shared -o $@ \
+
+# Link together the dynamic linker into a single relocatable object.
+# We use this to produce both the ABI-compliant and Linux-compatible
+# dynamic linker shared objects below.
+$(objpfx)librtld.so: $(rtld-routines:%=$(objpfx)%.so) \
+		     $(patsubst %,$(common-objpfx)lib%_pic.a,\
+				elf c $(LDLIBS-c.so:-l%=%))
+	$(LINK.o) -nostdlib -nostartfiles -r -o $@ \
 		  '-Wl,-(' $^ -lgcc '-Wl,-)'
 
+$(objpfx)ld.so $(objpfx)ld-linux.so.1: $(objpfx)librtld.so
+	$(LINK.o) -nostdlib -nostartfiles -shared -o $@ $^
+
+# The Linux-compatible dynamic linker shared object is just the same
+# with one object file of compatibility initialization code added.
+$(objpfx)ld-linux.so.1: $(objpfx)linux-compat.so
+
+
 $(objpfx)libdl.so: $(objpfx)libdl_pic.a $(common-objpfx)libc.so $(objpfx)ld.so
 	$(patsubst %/,cd %;,$(objpfx)) \
 	$(LINK.o) -shared -o $(@:$(objpfx)%=%) \