Makefile.in (libgcc2): Pass MAYBE_USE_COLLECT2 as an argument.

        * Makefile.in (libgcc2): Pass MAYBE_USE_COLLECT2 as an argument.
        * libgcc2.c (__CTOR_LIST, __DTOR_LIST); Do not provide
        initializers is some circumstances.

From-SVN: r27489

gcc/ChangeLog

 Fri Jun 11 03:17:51 1999  Jeffrey A Law  (law@cygnus.com)
 
+	* Makefile.in (libgcc2): Pass MAYBE_USE_COLLECT2 as an argument.
+	* libgcc2.c (__CTOR_LIST, __DTOR_LIST); Do not provide
+	initializers is some circumstances.
+
 	* fixinc/inclhack.def (endif_label): Add additional selector for
 	more bogus stuff after #endif statements.
 	* fixinc/inclhack.sh, fixinc/fixincl.x: Rebuilt.

gcc/Makefile.in

@@ -393,6 +393,9 @@ EXTRA_HEADERS =@extra_headers_list@
 
 # Set this to `collect2' to enable use of collect2.
 USE_COLLECT2 = @will_use_collect2@
+# If we might be using collect2, then this variable will be set to
+# -DUSE_COLLECT2.  toplev.c, collect2.c and libgcc2.c all need to
+# if we may be using collect2.
 MAYBE_USE_COLLECT2 = @maybe_use_collect2@
 # It is convenient for configure to add the assignment at the beginning,
 # so don't override it here.
@@ -1067,7 +1070,7 @@ libgcc2.a: libgcc2.c libgcc2.ready $(CONFIG_H) $(FPBIT) $(DPBIT) $(LIB2ADD) \
 	do \
 	  echo $${name}; \
 	  $(GCC_FOR_TARGET) $(LIBGCC2_CFLAGS) $(INCLUDES) -c -DL$${name} \
-	      $(srcdir)/libgcc2.c -o $${name}$(objext); \
+	      $(MAYBE_USE_COLLECT2) $(srcdir)/libgcc2.c -o $${name}$(objext); \
 	  if [ $$? -eq 0 ] ; then true; else exit 1; fi; \
 	  $(AR_FOR_TARGET) $(AR_FLAGS_FOR_TARGET) tmplibgcc2.a $${name}$(objext); \
 	  rm -f $${name}$(objext); \

gcc/libgcc2.c

@@ -2903,17 +2903,26 @@ SYMBOL__MAIN ()
 #include "gbl-ctors.h"
 
 /* Provide default definitions for the lists of constructors and
-   destructors, so that we don't get linker errors.  
-
-   The old code sometimes put these into the data segment and sometimes
-   into the bss segment.  Putting these into the data segment should always
-   work and avoids a little bit of complexity.  */
+   destructors, so that we don't get linker errors.  These symbols are
+   intentionally bss symbols, so that gld and/or collect will provide
+   the right values.  */
 
 /* We declare the lists here with two elements each,
-   so that they are valid empty lists if no other definition is loaded.  */
+   so that they are valid empty lists if no other definition is loaded.
+
+   If we are using the old "set" extensions to have the gnu linker
+   collect ctors and dtors, then we __CTOR_LIST__ and __DTOR_LIST__
+   must be in the bss/common section.
+
+   Long term no port should use those extensions.  But many still do.  */
 #if !defined(INIT_SECTION_ASM_OP) && !defined(CTOR_LISTS_DEFINED_EXTERNALLY)
+#if defined (ASM_OUTPUT_CONSTRUCTOR) || defined (USE_COLLECT2)
 func_ptr __CTOR_LIST__[2] = {0, 0};
 func_ptr __DTOR_LIST__[2] = {0, 0};
+#else
+func_ptr __CTOR_LIST__[2];
+func_ptr __DTOR_LIST__[2];
+#endif
 #endif /* no INIT_SECTION_ASM_OP and not CTOR_LISTS_DEFINED_EXTERNALLY */
 #endif /* L_ctors */