https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61577
--- Comment #181 from Peter Bisroev <peter.bisroev at groundlabs dot com> --- (In reply to Peter Bisroev from comment #179) > (In reply to dave.anglin from comment #178) > > The configure test didn't find support for COMDAT groups even though aCC and > > HP ld > > support them. So, there's likely something incompatible with the default > > support for COMDAT > > groups. > > > > Could you look at configure test and see why it fails? > > Looking at configure in 4.9.4, there are two COMDAT related tests. > > First test "checking assembler for .nsubspa comdat" fails when it tries to > assemble: > ---------- > .SPACE $TEXT$ > .NSUBSPA $CODE$,COMDAT > ---------- > The errors are: > ---------- > conftest.s:2: Error: unknown pseudo-op: `.nsubspa' > conftest.s:1: Error: .space specifies non-absolute value > ---------- > Looking through gas manual it looks like '.nsubspa' and that variation of > '.space' are only supported for HPPA. > > The second test "checking assembler for COMDAT group support (GNU as)" > passes when it tries to assemble: > ---------- > .section .text,"axG",@progbits,.foo,comdat > ---------- > > However just below this check, configure looks for GNU linker, and if one > not found, disables COMDAT group support even though the second test passed. > > However `--enable-comdat` configure flag seems to override this behavior. I > will try to recompile 4.7.4 with it to see what happens. > > Thanks! So we made some progress here. I have rebuilt 4.7.4 with --enable-comdat. 3 stage bootstrap went fine (running 'make check' now). Using that tried to bootstrap 4.9.4 again. We are getting a lot less PCREL21B relocation issues when linking cc1plus. For example: With --enable-comdat: ld: The value 0xfffffffffdfd38c0 does not fit when applying the relocation PCREL21B for symbol ".text" at offset 0x92 in section index 139 of file libbackend.a[gcse.o] ld: The value 0xfffffffffdfea070 does not fit when applying the relocation PCREL21B for symbol ".text" at offset 0x22 in section index 402 of file libbackend.a[gimple.o] Without --enable-comdat: ld: The value 0xfffffffffdf6d810 does not fit when applying the relocation PCREL21B for symbol ".text" at offset 0x102 in section index 74 of file libbackend.a[function.o] ld: The value 0xfffffffffdeeb8b0 does not fit when applying the relocation PCREL21B for symbol ".text" at offset 0x102 in section index 79 of file libbackend.a[function.o] ld: The value 0xfffffffffdfd81f0 does not fit when applying the relocation PCREL21B for symbol ".text" at offset 0x102 in section index 60 of file libbackend.a[gimple.o] ld: The value 0xfffffffffdf562a0 does not fit when applying the relocation PCREL21B for symbol ".text" at offset 0x102 in section index 65 of file libbackend.a[gimple.o] ld: The value 0xfffffffffde4c890 does not fit when applying the relocation PCREL21B for symbol ".text" at offset 0x22 in section index 207 of file libbackend.a[gimple.o] ld: The value 0xfffffffffde4ae90 does not fit when applying the relocation PCREL21B for symbol ".text" at offset 0x22 in section index 212 of file libbackend.a[gimple.o] ld: The value 0xfffffffffdf81640 does not fit when applying the relocation PCREL21B for symbol ".text" at offset 0x102 in section index 59 of file libbackend.a[gimple-expr.o] ld: The value 0xfffffffffde83ea0 does not fit when applying the relocation PCREL21B for symbol ".text" at offset 0x22 in section index 21 of file libbackend.a[gimple-iterator.o] ld: The value 0xfffffffffde82940 does not fit when applying the relocation PCREL21B for symbol ".text" at offset 0x22 in section index 26 of file libbackend.a[gimple-iterator.o] ld: The value 0xfffffffffdf96310 does not fit when applying the relocation PCREL21B for symbol ".text" at offset 0x102 in section index 85 of file libbackend.a[gimple-fold.o] ld: The value 0xfffffffffde8cde0 does not fit when applying the relocation PCREL21B for symbol ".text" at offset 0x22 in section index 106 of file libbackend.a[gimple-fold.o] ld: The value 0xfffffffffde8b440 does not fit when applying the relocation PCREL21B for symbol ".text" at offset 0x22 in section index 111 of file libbackend.a[gimple-fold.o] ld: The value 0xfffffffffdec46b0 does not fit when applying the relocation PCREL21B for symbol ".text" at offset 0x22 in section index 172 of file libbackend.a[gimple-pretty-print.o] ld: The value 0xfffffffffdff2690 does not fit when applying the relocation PCREL21B for symbol ".text" at offset 0xc2 in section index 91 of file libbackend.a[ipa-inline-analysis.o] ld: The value 0xfffffffffdfed180 does not fit when applying the relocation PCREL21B for symbol ".text" at offset 0x172 in section index 96 of file libbackend.a[ipa-inline-analysis.o] ld: The value 0xfffffffffdfec950 does not fit when applying the relocation PCREL21B for symbol ".text" at offset 0x842 in section index 96 of file libbackend.a[ipa-inline-analysis.o] ld: The value 0xfffffffffdfec8b0 does not fit when applying the relocation PCREL21B for symbol ".text" at offset 0x8e2 in section index 96 of file libbackend.a[ipa-inline-analysis.o] ld: The value 0xfffffffffdfec6a0 does not fit when applying the relocation PCREL21B for symbol ".text" at offset 0xaf2 in section index 96 of file libbackend.a[ipa-inline-analysis.o] ld: The value 0xfffffffffdfe9bd0 does not fit when applying the relocation PCREL21B for symbol ".text" at offset 0x62 in section index 20 of file libbackend.a[ira-color.o]
