[ccache] ccache build failed, but no-ccache succedded

[Erik Cederstrand]

Hi!

I'm compiling CURRENT FreeBSD sources, and I just noticed that a compile 
using ccache failed, while the same sources build fine without ccache. 
It was my understanding that this should never be the case. I have 
captured the complete logs from the two builds[1]. Here's some info:

Error message from ccache build:

[...]
/usr/local/libexec/ccache/world-cc -O2 -fno-strict-aliasing -pipe 
-I/usr/src/lib/csu/i386-elf/../common 
-I/usr/src/lib/csu/i386-elf/../../libc/include -Wsystem-headers -Wall 
-Wno-format-y2k -W -Wno-unused-parameter -Wstrict-prototypes 
-Wmissing-prototypes -Wpointer-arith -Wreturn-type -Wcast-qual 
-Wwrite-strings -Wswitch -Wshadow -Wcast-align -Wunused-parameter 
-Wchar-subscripts -Winline -Wnested-externs -Wredundant-decls 
-Wno-pointer-sign -c /usr/src/lib/csu/i386-elf/crt1.c
{standard input}: Assembler messages:
{standard input}:27: Error: suffix or operands invalid for `mov'
*** Error code 1

Stop in /usr/src/lib/csu/i386-elf.
*** Error code 1


Host: FreeBSD 7.0-PRERELEASE #4, amd64
Source tree: FreeBSD CURRENT, CVS date 2007.10.26.17.06.07 UTC

Compile commands (using ccache):

   cd /usr/src
   unset CCACHE_PATH
   CC="/usr/local/libexec/ccache/world-cc"
   CXX="/usr/local/libexec/ccache/world-c++"
   make CC=$CC CXX=$CXX buildworld

No ccache:

   cd /usr/src
   make buildworld

world-cc/c++ are simple wrappers around their ccache equivalents:
   # less /usr/local/libexec/ccache/world-cc
   #!/bin/sh
   unset CCACHE_PATH
   export CCACHE_HASH_COMPILER
   exec /usr/local/libexec/ccache/cc "$@"

No exotic compiler flags in /etc/make.conf or /etc/src.conf

I'll check as soon as possible if I'm able to reproduce the error. I'll 
happily provide any other debugging info necessary.

Please Cc: me, I'm not on the list.

Thanks,
Erik


[1]
http://littlebit.dk/~erik/buildworld-2007.10.26.17.06.07.log
http://littlebit.dk/~erik/buildworld-noccache-2007.10.26.17.06.07.log