----- Mail original ----- > De: "Joel Rosdahl" <j...@rosdahl.net> > À: "g esp" <g....@free.fr> > Cc: ccache@lists.samba.org > Envoyé: Mercredi 30 Mai 2012 19:53:31 > Objet: Re: [ccache] Old code ccache hit always come back unless > CCACHE_DISABLE is used > > On 30 May 2012 09:14, <g....@free.fr> wrote: > > I had in the past an issue compiling util-linux-2.18 lscpu that was > > worked around adding '-fPIE -pie' to CFLAGS. > > The issue is that now with any new and fixed util-linux package, > > this workaround can't be removed or old compilation issue come > > back, unless CCACHE_DISABLE is used. > > [...] > > What should allow ccache not to retrieve the old hit that fail? > > As can be seen in no-fPIE.log, ccache doesn't get any cache hit, so it > isn't related to false cache hits. > > My guess is that when you compile without "-fPIE -pie", the compiler > can't compile its own preprocessed output. If this is the case, > setting CCACHE_CPP2=1 should make it work. > > -- Joel > For the record, the original issue was with ccache-3.1.5 or 3.1.6, binutils-2.21.1a, gcc-4.4.5 (patched spec to default to -fPIE)
On the no-fPIE case, using CCACHE_CPP2=1 change compilation to work. Any next recompilation even without CCACHE_CPP2=1 result in cache hit. I changed to ccache-3.1.7 and behavior is the same. I next changed gcc to gcc-4.4.7 and behavior is the same. Compilation work : - with CCACHE_DISABLE= or CCACHE_CPP2=1 Compilation fail : - with ccache-3.1.{5,6,7} and without CCACHE_CPP2=1 (using CCACHE_RECACHE to not depend from ccache content) gcc -std=gnu99 -DHAVE_CONFIG_H -I. -I.. -include ../config.h -I../include -DLOCALEDIR=\"/usr/share/locale\" -fsigned-char -Os -march=i486 -mtune=pentium -pipe -fomit-frame-pointer -MT lscpu.o -MD -MP -MF .deps/lscpu.Tpo -c -o lscpu.o lscpu.c lscpu.c: In function 'read_hypervisor': lscpu.c:446: error: can't find a register in class 'BREG' while reloading 'asm' lscpu.c:446: error: 'asm' operand has impossible constraints make: *** [lscpu.o] Error 1 Gilles _______________________________________________ ccache mailing list ccache@lists.samba.org https://lists.samba.org/mailman/listinfo/ccache