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Assuming this doesn't cause any regressions for any of the other multilib configurations please go ahead. The same applies to the proposed idt32.ld change.When testing GCC with the mips-sim-idt64 board, the -mips32r2 multilib from the mips64r2-elfoabi configuration fails to link. (Note that this is not an r2-only issue, mips64-elfoabi would fail similarly.)
idt64.ld sets OUTPUT_ARCH to isa64 which neither extends nor is a subset of isa32r2. To fix this, the patch below changes OUTPUT_ARCH to isa64r2. I also extended the comment to explain why setting the ISA in OUTPUT_ARCH is necessary.
With this I was able to test -mips32r2 on mips-sim-idt64. Also GCC testresults are identical for mipsisa64r2-elfoabi with the default multilib before and after.
OK to install? (I have commit access to src.)
Should I also change idt32.ld to isa32r2 for consistency?
Adam
* mips/idt64.ld: Set arch to mips:isa64r2 from mips:isa64. Update comment.
Index: idt64.ld
===================================================================
RCS file: /cvs/src/src/libgloss/mips/idt64.ld,v
retrieving revision 1.9
diff -u -r1.9 idt64.ld
--- idt64.ld 8 Jun 2006 16:13:11 -0000 1.9
+++ idt64.ld 2 Dec 2008 06:27:58 -0000
@@ -1,9 +1,11 @@
/* The following TEXT start address leaves space for the monitor
- workspace. This linker script links isa32 programs for use with the
- simulator. */
+ workspace. This linker script links ISA64r2 programs for use with the
+ simulator. We set the ISA explicitly so that we can link objects of
+ different ISAs that are subsets of ISA64r2 but are not extensions of
+ each other (e.g., MIPS32r2 and MIPS64). */
ENTRY(_start)
-OUTPUT_ARCH("mips:isa64")
+OUTPUT_ARCH("mips:isa64r2")
OUTPUT_FORMAT("elf32-littlemips", "elf32-bigmips", "elf32-littlemips")
GROUP(-lc -lidt -lgcc)
SEARCH_DIR(.)
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