Re: pkg/60439: lang/gcc12 fails to build on NetBSD/macppc 11.0_RC6 but succeeds on 10.0

The following reply was made to PR pkg/60439; it has been noted by GNATS.

From: Havard Eidnes <[email protected]>
To: [email protected], [email protected]
Cc: [email protected], [email protected]
Subject: Re: pkg/60439: lang/gcc12 fails to build on NetBSD/macppc 11.0_RC6
 but succeeds on 10.0
Date: Sun, 12 Jul 2026 15:57:12 +0200 (CEST)

 Hi,
 
 I took a look at the executables with "objdump -x", and looking
 for the sections with "CODE", for the one compiled with the
 in-tree gcc, I find:
 
   8 .init         00000020  0180040c  0180040c  0000040c  2**2
                   CONTENTS, ALLOC, LOAD, READONLY, CODE
   9 .text         000006c0  01800430  01800430  00000430  2**4
                   CONTENTS, ALLOC, LOAD, READONLY, CODE
  10 .fini         00000020  01800af0  01800af0  00000af0  2**2
                   CONTENTS, ALLOC, LOAD, READONLY, CODE
 
 However, for the one built by the half-built gcc12 compiler, I
 additionally find:
 
  20 .got          00000010  01820000  01820000  00010000  2**2
                   CONTENTS, ALLOC, LOAD, CODE
  21 .sdata        00000004  01820010  01820010  00010010  2**2
                   CONTENTS, ALLOC, LOAD, DATA
  22 .sbss         00000010  01820018  01820018  00010014  2**3
                   ALLOC
  23 .plt          000000c0  01820028  01820028  00010014  2**2
                   ALLOC, CODE
 
 and those two "CODE" marked sections are not marked as "CODE"
 when using the in-tree compiler.
 
 I've already tried linking the gcc12-built conftest.o that I
 built with the system linker, and the resulting executable still
 aborts, so collect2 and/or the linker does not appear to be to
 blame.
 
 Looking at the object files with "objdump -x" shows the same two
 sections marked as CODE (and no others):
 
 Sections:
 Idx Name          Size      VMA       LMA       File off  Algn
   0 .text         00000000  00000000  00000000  00000034  2**0
                   CONTENTS, ALLOC, LOAD, READONLY, CODE
 ...
   5 .text.startup 00000068  00000000  00000000  00000050  2**2
                   CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE
 
 and skimming through the rest reveals just one notable change:
 the in-tree-built conftest.o has
 
 RELOCATION RECORDS FOR [.text.startup]:
 OFFSET   TYPE              VALUE
 00000016 R_PPC_REL16_HA    .got2+0x0000800a
 0000001e R_PPC_REL16_LO    .got2+0x00008012
 00000028 R_PPC_PLTREL24    fopen+0x00008000
 00000054 R_PPC_PLTREL24    fclose+0x00008000
 
 whereas the gcc12-built has
 
 RELOCATION RECORDS FOR [.text.startup]:
 OFFSET   TYPE              VALUE
 00000000 R_PPC_REL32       .got2+0x00007ff0
 0000002c R_PPC_PLTREL24    fopen
 00000058 R_PPC_PLTREL24    fclose
 
 But I don't see how that will make such a difference in the
 executables.
 
 Any more hints for what to look for?