This page tracks current issues with GCC for M68k/Porting. User support and buildd admins can be found at debian-68k@lists.debian.org .

• gcc-4.4 with TLS backport is now the default
• works rather well
• builds from unmodified Debian unstable sources (thanks doko!)
• TLS capable eglibc in Debian unstable (thanks Aurélien!)
• next version will be gcc-4.6 (we will skip gcc-4.5 and it will not be released with wheezy according to doko)
• gcc-4.3 (and older) have been removed from Debian unstable already (by April 2011)

m68k usertags

• If you find a bug not listed, please usertag it or drop us a message, see M68k/Porting.

binNMUs

• binNMU bugs

Cross-Compilers

• build a stretch chroot for amd64

• A metapackage gcc-m68k-linux-gnu (also cpp, g++) is available

• These are built according to BuildingCrossCompilers

Building Cross-Compilers

• Best to start with EmdebianToolchain.

• Christian's cross-compiler guide for kernel building: http://people.debian.org/~cts/debian-m68k/cross-compile/

• Roman's cross-compiler guide for crosscc: http://www.xs4all.nl/~zippel/crosscc/crosscc.README

• Stephen's cross-compiler draft notes: http://people.debian.org/~smarenka/m68k/cross-compilers/aaareadme.txt

obsolete?

The information below is probably mostly obsolete

Bugs

Gathering the bugs in gcc-4.3_4.3.1-8.

ice in find_reloads

• hdf5
  • found in gcc 4.3.1-8
  • found in cross compiler
  • confirmed in 4.3.4-10+m68k from unreleased (tg@)
  • hit in kernel compile (btrfs) XXX why do we not use CONFIG_FRAME_POINTER?

  • test case

  • gnu pr 37052

  • bug #

testreloads.c:207: error: unable to generate reloads for:
(insn:QI 631 629 632 41 testreloads.c:94 (parallel [
            (set (cc0)
                (compare (reg/v:DI 0 %d0 [orig:117 j ] [117])
                    (reg:DI 4 %d4 [orig:115 pretmp.69 ] [115])))
            (clobber (reg:DI 273))
        ]) 12 {*m68k.md:521} (expr_list:REG_UNUSED (reg:DI 273)
        (nil)))
testreloads.c:207: internal compiler error: in find_reloads, at reload.c:3744

related?

• ffmpeg-debian
  • found in gcc-4.3_4.3.1-2

avidec.c:606: error: unable to generate reloads for:
(insn:QI 1388 1785 1389 174 /build/buildd/ffmpeg-debian-0.svn20080206/libavformat/avidec.c:211 (parallel [
            (set (cc0)
                (compare (reg:DI 10 %a2 [orig:62 pretmp.702 ] [62])
                    (reg:DI 4 %d4 [430])))
            (clobber (reg:DI 431))
        ]) 12 {*m68k.md:521} (expr_list:REG_UNUSED (reg:DI 431)
        (nil)))
avidec.c:606: internal compiler error: in find_reloads, at reload.c:3744

• ffmpeg-free
  • found in gcc-4.3_4.3.0-3

avidec.c:606: error: unable to generate reloads for:
(insn:QI 1388 1785 1389 174 avidec.c:211 (parallel [
            (set (cc0)
                (compare (reg:DI 10 %a2 [orig:62 pretmp.702 ] [62])
                    (reg:DI 4 %d4 [430])))
            (clobber (reg:DI 431))
        ]) 12 {*m68k.md:521} (expr_list:REG_UNUSED (reg:DI 431)
        (nil)))
avidec.c:606: internal compiler error: in find_reloads, at reload.c:3744

• llvm
  • found in gcc-4.3_4.3.0-3
  • different than above, although same area

InstructionCombining.cpp:9187: error: unable to generate reloads for:
(insn:QI 1193 1192 1194 210 InstructionCombining.cpp:8939 (parallel [
            (set (cc0)
                (compare (reg:DI 0 %d0)
                    (reg:DI 4 %d4 [499])))
            (clobber (reg:DI 501))
        ]) 12 {*m68k.md:521} (expr_list:REG_DEAD (reg:DI 0 %d0)
        (expr_list:REG_UNUSED (reg:DI 501)
            (nil))))
InstructionCombining.cpp:9187: internal compiler error: in find_reloads, at reload.c:3744

ice in reload_cse_simplify_operands

• r-base
  • found in gcc-4.3_4.3.1-8
  • found in cross-compiler

  • test case

  • gnu pr 37053

  • bug #

postreload.c:886: error: insn does not satisfy its constraints:
(insn 309 2675 2677 36 postreload.c:446 (set (reg:SI 0 %d0)
        (plus:SI (mem/f:SI (reg:SI 8 %a0) [0 S4 A16])
            (reg:SI 0 %d0))) 132 {*addsi3_internal} (nil))
postreload.c:886: internal compiler error: in reload_cse_simplify_operands, at postreload.c:395

• pymol
  • found in gcc-4.3_4.3.1-8

Selector.c:3225: error: insn does not satisfy its constraints:
(insn 276 502 504 38 layer3/Selector.c:3213 (set (reg:SI 0 %d0)
        (plus:SI (mem/f:SI (reg:SI 8 %a0) [0 S4 A16])
            (reg:SI 0 %d0))) 132 {*addsi3_internal} (nil))
layer3/Selector.c:3225: internal compiler error: in reload_cse_simplify_operands, at postreload.c:395

related?

• gnudatalanguage
  • found in gcc-4.3_4.3.1-8

{{{convol.cpp:127: error: insn does not satisfy its constraints: (insn 1771 4339 1772 331 convol_inc1.cpp:355 (set (reg:HI 0 %d0 [orig:675+2 ] [675])

• (mult:HI (mem:HI (reg:SI 9 %a1) [304 S2 A16])
  • (reg:HI 0 %d0 [orig:673+2 ] [673]))) 178 {mulhi3} (nil))

convol.cpp:127: internal compiler error: in reload_cse_simplify_operands, at postreload.c:395 }}}

• meep
  • found in gcc-4.3_4.3.1-8

{{{../../../src/boundaries.cpp:441: error: insn does not satisfy its constraints: (insn 1749 3315 3317 237 ../../../src/boundaries.cpp:427 (set (reg:SI 6 %d6)

• (plus:SI (mem/s/f:SI (reg:SI 9 %a1) [68 <variable>.P S4 A8])

  • (reg:SI 6 %d6))) 132 {*addsi3_internal} (nil))

../../../src/boundaries.cpp:441: internal compiler error: in reload_cse_simplify_operands, at postreload.c:395 Please submit a full bug report, with preprocessed source if appropriate. See <file:///usr/share/doc/gcc-4.3/README.Bugs> for instructions. }}}

• courier
  • found in gcc-4.3_4.3.0-3

  • utf7.c:229: internal compiler error: in reload_cse_simplify_operands, at postreload.c:395

• gnome-keyring
  • found in gcc-4.3_4.3.1-2

  • gkr-crypto.c:151: internal compiler error: in reload_cse_simplify_operands, at postreload.c:395

• insighttoolkit
  • found in gcc-4.3_4.3.1-8

  • jdsample.c:141: internal compiler error: in reload_cse_simplify_operands, at postreload.c:395

• osptoolkit

  • sptransapi.c:121: internal compiler error: in reload_cse_simplify_operands, at postreload.c:395

ice Segmentation fault: Reconfirm with -8

• gnome-settings-daemon
  • found in gcc-4.3_4.3.0-3

  • gsd-xmodmap.c:397: internal compiler error: Segmentation fault

• oolite
  • found in gcc-4.3_4.3.1-2

  • PlayerEntity Additions.m:1882: internal compiler error: Segmentation fault

• opencv
  • found in gcc-4.3_4.3.1-2

  • cvfundam.cpp:311: internal compiler error: Segmentation fault

• gmfsk

  • internal compiler error: Segmentation fault

• gpc-4.1

  • rtsc.pas:430: internal compiler error: Segmentation fault

Other

• simutrans
  • found in gcc-4.3_4.3.1-8

  • route.cc:520: internal compiler error: in subreg_get_info, at rtlanal.c:3185

Reconfirm w/ -8

• compiz
  • found in gcc-4.3_4.3.0-3

  • decorator.moc.cpp:130: internal compiler error: in value_format, at dwarf2out.c:7015

• iceowl
  • found in gcc-4.3_4.3.0-3

  • error: asm-specifier for variable ¿result¿ conflicts with asm clobber list

• linux-2.6
  • found in gcc-4.3
• genesis
  • found in gcc-4.3_4.3.0-3

  • hines_chip.c:595: internal compiler error: in reg_overlap_mentioned_for_reload_p, at reload.c:6525

• gforth

  • ./engine.c:340: error: unable to find a register to spill in class ADDR_REGS

• libgnupdf

  • ccZe2Dva.s:1523: Error: operands mismatch -- statement `rol.w #0,%d2' ignored

• openvrml

  • Internal error: Killed (program cc1plus)

• washngo_2.12-1

  • Internal error: Killed (program cc1)

Old glibc vs. gcc-4.3

Per http://lists.debian.org/debian-68k/2008/04/msg00033.html

The glibc support for the C99 inline semantics was added in glibc 2.6 and all the non-TLS support was removed. GCC 4.3 and later use C99 inline semantics in -std=gnu99 mode

This was resolved with -5 (although the first GCC we managed to build was -8). -std=gnu99 mode can now be used without any issue.

gcc-4.x bugs

• debian gcc-4.3 bts

• debian gcc-4.2 bts

• debian gcc-4.1 bts

• upstream gcc bugs

• check with gcc-snapshot (if it's more recent than sid)

upstream

• GCC Bugs

Compiler status

• We don't have an Ada or D compiler at the moment since both compilers require special bootstrapping which has never been done. Michael Casadevall has been been able to build the Ada cross-compiler, but hasn't successfully bootstrapped the native compiler; Thorsten Glaser has discovered that the System'Address type must be coerced into %a0 instead of %d0 by GCC, so the ball is now in the hands of the GCC/GNAT developers
• D will probably require similar work done for it.

CategoryPorts