nonfunctional.

[Alan Modra]

On Tue, 18 Apr 2000, Richard Henderson wrote:

> Won't help here, since the linker won't detect anything.

However, gas can easily detect a change in section flags if that happens
in one input file, which was the case for recent examples of this sort of
problem reported on the binutils list.  Something like the following
(completely untested, not even compiled) should do it:

--- gas/config/obj-elf.c~	Tue Feb 29 16:48:03 2000
+++ gas/config/obj-elf.c	Tue Apr 18 19:42:28 2000
@@ -617,7 +617,7 @@ obj_elf_change_section (name, type, attr
      char *name;
      int type, attr, push;
 {
-  int new_sec;
+  asection *old_sec;
   segT sec;
 
 #ifdef md_flush_pending_output
@@ -639,10 +639,27 @@ obj_elf_change_section (name, type, attr
   previous_section = now_seg;
   previous_subsection = now_subseg;
 
-  new_sec = bfd_get_section_by_name (stdoutput, name) == NULL;
+  old_sec = bfd_get_section_by_name (stdoutput, name);
   sec = subseg_new (name, 0);
 
-  if (new_sec)
+  if (old_sec)
+    {
+      flagword flags;
+      /* Convert ELF type and flags to BFD flags.  */
+      flags = (SEC_RELOC
+	       | ((attr & SHF_WRITE) ? 0 : SEC_READONLY)
+	       | ((attr & SHF_ALLOC) ? SEC_ALLOC : 0)
+	       | (((attr & SHF_ALLOC) && type != SHT_NOBITS) ? SEC_LOAD : 0)
+	       | ((attr & SHF_EXECINSTR) ? SEC_CODE : 0));
+#ifdef md_elf_section_flags
+      flags = md_elf_section_flags (flags, attr, type);
+#endif
+      if ((old_sec->flags ^ flags)
+	  & (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
+	     | SEC_EXCLUDE | SEC_SORT_ENTRIES))
+	as_warn (_("Section attributes for %s have changed"), name);
+    }
+  else
     {
       flagword flags;
       symbolS *secsym;

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