Fix comment.

[kopensolaris-gnu/glibc.git] / csu / Makefile

diff --git a/csu/Makefile b/csu/Makefile
index cba8a4a..4c34354 100644 (file)
--- a/csu/Makefile
+++ b/csu/Makefile
@@ -36,25 +36,12 @@ omit-deps = $(patsubst %.o,%,$(start-installed-name) g$(start-installed-name) \
                             $(csu-dummies))
 install-lib = $(start-installed-name) g$(start-installed-name) \
              $(csu-dummies)
-distribute = initfini.c gmon-start.c start.c defs.awk
+distribute = initfini.c gmon-start.c start.c defs.awk abi-note.S abi-tag.h
 
 all: # Make this the default target; it will be defined in Rules.
 
 include ../Makeconfig
 
-ifneq ($(elf),yes)
-
-# When not using ELF, there is just one startfile, called crt0.o.
-start-installed-name = crt0.o
-
-else
-
-# In the ELF universe, crt0.o is called crt1.o, and there are
-# some additional bizarre files.
-start-installed-name = crt1.o
-have-initfini = yes
-
-endif
 
 ifeq ($(have-initfini),yes)
 
@@ -65,18 +52,42 @@ CPPFLAGS += -DHAVE_INITFINI
 # "functions" _init and _fini to run the .init and .fini sections.
 crtstuff = crti crtn
 
+# If we need separate startup code, require separate code.
+ifeq ($(need-nopic-initfini),yes)
+crtstuff += crtiS crtnS
+endif
+
 install-lib += $(crtstuff:=.o)
 extra-objs += $(crtstuff:=.o)
-generated += $(crtstuff:=.S) initfini.s align.h end.h
+generated += $(crtstuff:=.S) initfini.s initfiniS.s align.h end.h
 omit-deps += $(crtstuff)
 
 # Special rules for the building of crti.o and crtn.o
 $(objpfx)crt%.o: $(objpfx)crt%.S $(objpfx)defs.h
-       $(CC) -c -fPIC -g0 -I$(..) -I$(common-objpfx) -DASSEMBLER $< -o $@
+       $(compile.S) -g0 -o $@
 
 $(objpfx)initfini.s: initfini.c
-       $(CC) -S -fPIC -finhibit-size-directive $(no-exceptions) $< -o $@
+       $(compile.c) -g0 -S -finhibit-size-directive \
+               $(no-exceptions) -o $@
 
+$(objpfx)initfiniS.s: initfini.c
+       $(compile.c) -g0 -S -fPIC -finhibit-size-directive \
+               $(no-exceptions) -o $@
+
+ifneq ($(need-nopic-initfini),yes)
+# We only have one kind of startup code files.  Static binaries and
+# shared libraries are build using the PIC version.
+$(objpfx)crti.S: $(objpfx)initfiniS.s
+       sed -n -e '1,/@HEADER_ENDS/p' \
+              -e '/@_.*_PROLOG_BEGINS/,/@_.*_PROLOG_ENDS/p' \
+              -e '/@TRAILER_BEGINS/,$$p' $< > $@
+
+$(objpfx)crtn.S: $(objpfx)initfiniS.s
+       sed -n -e '1,/@HEADER_ENDS/p' \
+              -e '/@_.*_EPILOG_BEGINS/,/@_.*_EPILOG_ENDS/p' \
+              -e '/@TRAILER_BEGINS/,$$p' $< > $@
+else
+# We have to build two versions, one with one without PIC code.
 $(objpfx)crti.S: $(objpfx)initfini.s
        sed -n -e '1,/@HEADER_ENDS/p' \
               -e '/@_.*_PROLOG_BEGINS/,/@_.*_PROLOG_ENDS/p' \
@@ -87,27 +98,54 @@ $(objpfx)crtn.S: $(objpfx)initfini.s
               -e '/@_.*_EPILOG_BEGINS/,/@_.*_EPILOG_ENDS/p' \
               -e '/@TRAILER_BEGINS/,$$p' $< > $@
 
+$(objpfx)crtiS.S: $(objpfx)initfiniS.s
+       sed -n -e '1,/@HEADER_ENDS/p' \
+              -e '/@_.*_PROLOG_BEGINS/,/@_.*_PROLOG_ENDS/p' \
+              -e '/@TRAILER_BEGINS/,$$p' $< > $@
+
+$(objpfx)crtnS.S: $(objpfx)initfiniS.s
+       sed -n -e '1,/@HEADER_ENDS/p' \
+              -e '/@_.*_EPILOG_BEGINS/,/@_.*_EPILOG_ENDS/p' \
+              -e '/@TRAILER_BEGINS/,$$p' $< > $@
+endif
+
 $(objpfx)defs.h: $(objpfx)initfini.s
        sed -n -e '/@TESTS_BEGIN/,/@TESTS_END/p' $< | \
                awk -f defs.awk > $@
 
 endif
 
+ifeq (yes,$(elf))
+extra-objs += abi-note.o
+endif
+
 include ../Rules
 
+define link-relocatable
+$(CC) -nostdlib -nostartfiles -r -o $@ $^
+endef
+
 ifndef start-installed-name-rule
+ifeq (yes,$(elf))
+# We link the ELF startfile along with a SHT_NOTE section indicating
+# the the kernel ABI the binaries linked with this library will require.
+$(objpfx)$(start-installed-name): $(objpfx)start.o $(objpfx)abi-note.o
+       $(link-relocatable)
+else
 # The startfile is installed under different names, so we just call our
 # source file `start.c' and copy to the installed name after compiling.
 $(objpfx)$(start-installed-name): $(objpfx)start.o
-       -rm -f $@
+       rm -f $@
        ln $< $@
 endif
+endif
 
 # The profiling startfile is made by linking together the normal
 # startfile with gmon-start.o, which defines a constructor function
 # to turn on profiling code at startup.
-$(objpfx)g$(start-installed-name): $(objpfx)start.o $(objpfx)gmon-start.o
-       $(CC) -nostdlib -nostartfiles -r -o $@ $^
+$(objpfx)g$(start-installed-name): $(objpfx)$(start-installed-name) \
+                                  $(objpfx)gmon-start.o
+       $(link-relocatable)
 
 # These extra files are sometimes expected by system standard linking
 # procedures, but we have nothing for them to do.  So compile empty files.