Tue Feb 21 00:10:50 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>

	* csu/Makefile (crtstuff): New variable consolidates crti, crtn;
 	add crti_s, crtn_s.
	(install-lib, extra-objs, generated-, omit-deps): Use that.
	(initfini): New canned sequence, broken out of crt[in].s rule.
	(crt[in].s rule): Use it.
	(crt[in]_s.s): New rule.
	* csu/initfini.c (GLOBAL): New macro; define it to empty if undefined.
	(_init, _fini): Use GLOBAL as storage class.
	Add self reference to avoid GCC optimizing out the functions.

	* Makefile (headers): Remove $(stddef.h).
	* Makeconfig (stddef.h): Variable removed; now require gcc version
 	>= 2.2.
	* stddef.h: File removed.

Mon Feb 20 19:42:31 1995  Roland McGrath  <roland@churchy.gnu.ai.mit.edu>

	* sysdeps/unix/bsd/ultrix4/mips/start.S: Remove `__environ'
 	definition.
	* sysdeps/unix/bsd/osf1/alpha/start.S: Likewise.

	* stdlib/strtod.c: Allow the string to start with a decimal point
 	without a leading zero.

2 files changed, 46 insertions, 19 deletions

diff --git a/csu/Makefile b/csu/Makefile
index 6de77b768c..4943087203 100644
--- a/csu/Makefile
+++ b/csu/Makefile
@@ -39,33 +39,51 @@ 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
-install-lib += crti.o crtn.o
-extra-objs += crti.o crtn.o
-generated += crti.s crtn.s
-omit-deps += crti crtn
+
+# These are the special initializer/finalizer files.  They are always the
+# first and last file in the link.  crti.o ... crtn.o are used for normal
+# linking; they define the global "functions" _init and _fini to run the
+# .init and .fini sections.  crti_s.o ... crtn_s.o are for making shared
+# library objects; they put the prologue/epilogue code into the .init and
+# .fini sections, but define no global symbols.
+crtstuff = crti crtn crti_s crtn_s
+
+install-lib += $(crtstuff:=.o)
+extra-objs += $(crtstuff:=.o)
+generated += $(crtstuff:=.s)
+omit-deps += $(crtstuff)
 
 # Compile initfini.c to assembly code, which contains embedded shell
 # commands that prodice crti.s-new and crtn.s-new when run.  We need to
 # disable emission of .size directives and debugging information, since
 # they will get confused by the splitting of the output we do.
-$(objpfx)cr%i.s $(objpfx)cr%n.s: initfini.c
-	-rm -f $(objpfx)crtcommon.tmp
-	(echo 'cat > crtcommon.tmp <<\EOF_common'; \
-	 $(CC) $< $(CPPFLAGS) $(CFLAGS) -finhibit-size-directive -g0 -S -o -; \
-	 echo 'EOF_common') | (cd $(@D); $(SHELL))
-	cat $(objpfx)crtcommon.tmp >> $(objpfx)crti.s-new
-	cat $(objpfx)crtcommon.tmp >> $(objpfx)crtn.s-new
-	rm -f $(objpfx)crtcommon.tmp
-	mv -f $(objpfx)crti.s-new $(objpfx)crti.s
-	mv -f $(objpfx)crtn.s-new $(objpfx)crtn.s
-endif
+$(objpfx)cr%i.s $(objpfx)cr%n.s: initfini.c; $(initfini)
+$(objpfx)cr%i_s.s $(objpfx)cr%n_s.s: initfini.c; $(initfini)
+
+define initfini
+-rm -f $(objpfx)crtcommon.tmp
+(echo 'cat > crtcommon.tmp <<\EOF_common'; \
+ $(CC) $< $(CPPFLAGS) $(CFLAGS) \
+       $(patsubst %,-DGLOBAL=static,$(filter %_s.s,$@)) \
+       -finhibit-size-directive -g0 -S -o -; \
+ echo 'EOF_common') | (cd $(@D); $(SHELL))
+cat $(objpfx)crtcommon.tmp >> $(objpfx)crti.s-new
+cat $(objpfx)crtcommon.tmp >> $(objpfx)crtn.s-new
+rm -f $(objpfx)crtcommon.tmp
+mv -f $(objpfx)crti.s-new $(subst crtn,crti,$@)
+mv -f $(objpfx)crtn.s-new $(subst crti,crtn,$@)
+endef
 
+endif
 
 include ../Rules
 
diff --git a/csu/initfini.c b/csu/initfini.c
index ea16e62ffe..bfd120b7ef 100644
--- a/csu/initfini.c
+++ b/csu/initfini.c
@@ -34,11 +34,18 @@ Cambridge, MA 02139, USA.  */
 
 #include <stdlib.h>
 
+/* We are compiled with -DGLOBAL=static to generate the versions used for
+   shared libraries' .init and .fini sections, which do not have entry
+   point symbols.  */
+#ifndef GLOBAL
+#define GLOBAL
+#endif
+
 /* These declarations make the functions go in the right sections when
    we define them below.  GCC syntax does not allow the attribute
    specifications to be in the function definitions themselves.  */
-void _init (void) __attribute__ ((section (".init")));
-void _fini (void) __attribute__ ((section (".fini")));
+GLOBAL void _init (void) __attribute__ ((section (".init")));
+GLOBAL void _fini (void) __attribute__ ((section (".fini")));
 
 /* End the here document containing the initial common code.
    Then move the output file crtcommon.tmp to crti.s-new and crtn.s-new.  */
@@ -48,9 +55,10 @@ cp -f crti.s-new crtn.s-new");
 
 /* Append the .init prologue to crti.s-new.  */
 asm ("cat >> crti.s-new <<\\EOF.crti.init");
-void
+GLOBAL void
 _init (void)
 {
+  (void) &_init;		/* Don't optimize out the function! */
   /* End the here document containing the .init prologue code.
      Then fetch the .section directive just written and append that
      to crtn.s-new, followed by the function epilogue.  */
@@ -66,9 +74,10 @@ asm ("\nEOF.crtn.init\
 \n\
 cat >> crti.s-new <<\\EOF.crti.fini");
 
-void
+GLOBAL void
 _fini (void)
 {
+  (void) &_fini;		/* Don't optimize out the function! */
   /* End the here document containing the .fini prologue code.
      Then fetch the .section directive just written and append that
      to crtn.s-new, followed by the function epilogue.  */