toolchain/45560: Unable to cross build HEAD kernel on MacOS X 10.7

[rkujawa%NetBSD.org@localhost]

>Number:         45560
>Category:       toolchain
>Synopsis:       Unable to cross build HEAD kernel on MacOS X 10.7
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    toolchain-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Nov 03 11:15:00 +0000 2011
>Originator:     Radoslaw Kujawa
>Release:        
>Organization:
>Environment:
Darwin saiko.home.c0ff33.net 11.2.0 Darwin Kernel Version 11.2.0: Tue Aug  9 
20:54:00 PDT 2011; root:xnu-1699.24.8~1/RELEASE_X86_64 x86_64
>Description:
I'm unable to cross build kernel since m68k ports were switched to GCC 4.5 (31 
october). 

Compilation fails with:

#    create  GENERIC/db_access.d
CC=/Users/rkujawa/repos/src/obj/tooldir.Darwin-11.2.0-x86_64/bin/m68k--netbsdelf-gcc
 /Users/rkujawa/repos/src/obj/tooldir.Darwin-11.2.0-x86_64/bin/nbmkdep -f 
db_access.d --  -m68020-60 -Wa,-m68030 -Wa,-m68851 -msoft-float -ffreestanding 
-fno-zero-initialized-in-bss  -O2 -fno-strict-aliasing   -std=gnu99 -Werror 
-Wall -Wno-main -Wno-format-zero-length -Wpointer-arith -Wmissing-prototypes 
-Wstrict-prototypes -Wswitch -Wshadow -Wcast-qual -Wwrite-strings 
-Wno-unreachable-code -Wno-pointer-sign -Wno-attributes -Wno-sign-compare      
--sysroot=/Users/rkujawa/repos/src/obj/destdir.amiga -Damiga -DFPCOPROC -I.  
-I/Users/rkujawa/repos/src/sys/../common/include 
-I/Users/rkujawa/repos/src/sys/arch  -I/Users/rkujawa/repos/src/sys -nostdinc 
-DDRACO -DMAXUSERS=8 -D_KERNEL -D_KERNEL_OPT -std=gnu99 
-I/Users/rkujawa/repos/src/sys/lib/libkern/../../../common/lib/libc/quad 
-I/Users/rkujawa/repos/src/sys/lib/libkern/../../../common/lib/libc/string 
-I/Users/rkujawa/repos/src/sys/lib/libkern/../.
 ./../common/lib/libc/arch/m68k/string   
-I/Users/rkujawa/repos/src/sys/dist/ipf  
/Users/rkujawa/repos/src/sys/ddb/db_access.c
--- assym.h ---
/tmp/genassym.99980/assym.c:132:1: internal compiler error: in 
execute_ipa_pass_list, at passes.c:1800
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://www.NetBSD.org/Misc/send-pr.html> for instructions.
*** [assym.h] Error code 1

nbmake: stopped in /Users/rkujawa/repos/src/sys/arch/amiga/compile/obj/GENERIC
1 error

nbmake: stopped in /Users/rkujawa/repos/src/sys/arch/amiga/compile/obj/GENERIC

ERROR: Failed to make depend in 
"/Users/rkujawa/repos/src/sys/arch/amiga/compile/obj/GENERIC"
*** BUILD ABORTED ***

This problem probably exist also for other architectures (is not 
m68k-specific). 
>How-To-Repeat:
- Install MacOS X 10.7
- Install XCode 4.1
- Check out NetBSD source dated 20111101 or newer
- Build tools: ./build.sh -U -j2 -m amiga tools
- Try to build a kernel for amiga port: ./build.sh -U -j2 -m amiga 
kernel=GENERIC
- Observe the error message

>Fix:
Workaround: specify HOST_CC and HOST_CXX variables to use old GCC 4.2 (non 
clang/llvm):

 ./build.sh -m amiga -U -j2 -V HOST_CC=gcc-4.2 -V HOST_CXX=g++-4.2 tools

GCC bug: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49656 .

Proper fix not known.