Robert P. J. DAY says:
apparently, the patchset for gcc 4.2.1 applies properly to the
source for gcc 4.2.2 and gcc 4.2.3. so, if you want, you can simply
add support for those last two just by augmenting menuconfig and
adding a couple symlinks for those two directories. seems like a
cheap way to add a couple new versions.
1 diff -durN gcc-3.4.6.orig/gcc/config/sh/sh.c gcc-3.4.6/gcc/config/sh/sh.c
2 --- gcc-3.4.6.orig/gcc/config/sh/sh.c 2004-09-03 08:51:30.000000000 +0200
3 +++ gcc-3.4.6/gcc/config/sh/sh.c 2007-08-15 23:01:48.000000000 +0200
6 this = FUNCTION_ARG (cum, Pmode, ptr_type_node, 1);
8 + /* In PIC case, we set PIC register to compute the target address. We
9 + can use a scratch register to save and restore the original value
10 + except for SHcompact. For SHcompact, use stack. */
11 + if (flag_pic && TARGET_SHCOMPACT)
13 + push (PIC_OFFSET_TABLE_REGNUM);
14 + emit_insn (gen_GOTaddr2picreg ());
17 /* For SHcompact, we only have r0 for a scratch register: r1 is the
18 static chain pointer (even if you can't have nested virtual functions
19 right now, someone might implement them sometime), and the rest of the
20 @@ -9189,8 +9198,24 @@
21 assemble_external (function);
22 TREE_USED (function) = 1;
24 + /* We can use scratch1 to save and restore the original value of
25 + PIC register except for SHcompact. */
26 + if (flag_pic && ! TARGET_SHCOMPACT)
28 + emit_move_insn (scratch1,
29 + gen_rtx_REG (Pmode, PIC_OFFSET_TABLE_REGNUM));
30 + emit_insn (gen_GOTaddr2picreg ());
32 funexp = XEXP (DECL_RTL (function), 0);
33 emit_move_insn (scratch2, funexp);
36 + if (! TARGET_SHCOMPACT)
37 + emit_move_insn (gen_rtx_REG (Pmode, PIC_OFFSET_TABLE_REGNUM),
40 + pop (PIC_OFFSET_TABLE_REGNUM);
42 funexp = gen_rtx_MEM (FUNCTION_MODE, scratch2);
43 sibcall = emit_call_insn (gen_sibcall (funexp, const0_rtx, NULL_RTX));
44 SIBLING_CALL_P (sibcall) = 1;