| View previous topic :: View next topic |
| Author |
Message |
Spiros
Apprentice
Joined: 11 Mar 2008
Posts: 189
Location: Zurich
|
 Posted: Wed Feb 04, 2009 12:38 pm Post subject: [SOLVED] core2 in -mtune |
 |
|
Spero di non chiedere cose già chieste, ma non ho trovato nulla.
Sto installando una amd64, il processore è un Intel Core2 Duo. In make.conf ho messo
CFLAGS="-O2 -mtune=core2 -pipe"
CXXFLAGS="-O2 -mtune=core2 -pipe"
ma le compilazioni con portage non vanno. Posto un po' di log:
| Code: |
configure:1453: checking for x86_64-pc-linux-gnu-gcc
configure:1469: found /usr/bin/x86_64-pc-linux-gnu-gcc
configure:1479: result: x86_64-pc-linux-gnu-gcc
...
Target: x86_64-pc-linux-gnu
Configured with: /var/tmp/portage/sys-devel/gcc-4.1.2/work/gcc-4.1.2/configure -
-prefix=/usr --bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/4.1.2 --includedir=/usr/l
ib/gcc/x86_64-pc-linux-gnu/4.1.2/include --datadir=/usr/share/gcc-data/x86_64-pc
-linux-gnu/4.1.2 --mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.1.2/man --in
fodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.1.2/info --with-gxx-include-dir=
/usr/lib/gcc/x86_64-pc-linux-gnu/4.1.2/include/g++-v4 --host=x86_64-pc-linux-gnu
--build=x86_64-pc-linux-gnu --disable-altivec --enable-nls --without-included-g
ettext --with-system-zlib --disable-checking --disable-werror --enable-secureplt
--disable-libunwind-exceptions --enable-multilib --enable-libmudflap --disable-
libssp --disable-libgcj --enable-languages=c,c++,treelang,fortran --enable-share
d --enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu
Thread model: posix
gcc version 4.1.2 (Gentoo 4.1.2 p1.0.2)
configure:1772: $? = 0
configure:1774: x86_64-pc-linux-gnu-gcc -V </dev/null >&5
x86_64-pc-linux-gnu-gcc: '-V' option must have argument
configure:1777: $? = 1
configure:1800: checking for C compiler default output file name
configure:1803: x86_64-pc-linux-gnu-gcc -O2 -mtune=core2 -pipe -Wl,-O1 conftest.c >&5
conftest.c:1: error: bad value (core2) for -mtune= switch
configure:1806: $? = 1
|
Dice che "error: bad value (core2) for -mtune", eppure io ho guardato qui: http://gcc.gnu.org/onlinedocs/gcc/i386-and-x86_002d64-Options.html e core2 esiste.
In pratica ora portage è bloccato perché non può compilare niente. Ah, io ho provato a compilare con g++ e con x86_64-pc-linux-gnu-gcc un "Hello world" in c++ e funzionano.
EDIT:
Ora ho provato a compilare il mio hello world con il comando "g++ -mtune=core2 hello.cpp" ed effettivamente viene restituito l'errore che ho già segnalato. Ho provato a mettere generic, native e altri e non funziona mai, dice sempre che il valore non è valido per lo switch -mtune=. È strano, sembra che non riconosca lo switch. E la cosa più strana è che se faccio man gcc o man g++ dice che la pagina di manuale non esiste e se do g++ --help stampa questo:
| Code: |
Usage: g++ [options] file...
Options:
-pass-exit-codes Exit with highest error code from a phase
--help Display this information
--target-help Display target specific command line options
(Use '-v --help' to display command line options of sub-processes)
-dumpspecs Display all of the built in spec strings
-dumpversion Display the version of the compiler
-dumpmachine Display the compiler's target processor
-print-search-dirs Display the directories in the compiler's search path
-print-libgcc-file-name Display the name of the compiler's companion library
-print-file-name=<lib> Display the full path to library <lib>
-print-prog-name=<prog> Display the full path to compiler component <prog>
-print-multi-directory Display the root directory for versions of libgcc
-print-multi-lib Display the mapping between command line options and
multiple library search directories
-print-multi-os-directory Display the relative path to OS libraries
-Wa,<options> Pass comma-separated <options> on to the assembler
-Wp,<options> Pass comma-separated <options> on to the preprocessor
-Wl,<options> Pass comma-separated <options> on to the linker
-Xassembler <arg> Pass <arg> on to the assembler
-Xpreprocessor <arg> Pass <arg> on to the preprocessor
-Xlinker <arg> Pass <arg> on to the linker
-combine Pass multiple source files to compiler at once
-save-temps Do not delete intermediate files
-pipe Use pipes rather than intermediate files
-time Time the execution of each subprocess
-specs=<file> Override built-in specs with the contents of <file>
-std=<standard> Assume that the input sources are for <standard>
--sysroot=<directory> Use <directory> as the root directory for headers
for headers and libraries
-B <directory> Add <directory> to the compiler's search paths
-b <machine> Run gcc for target <machine>, if installed
-V <version> Run gcc version number <version>, if installed
-v Display the programs invoked by the compiler
-### Like -v but options quoted and commands not executed
-E Preprocess only; do not compile, assemble or link
-S Compile only; do not assemble or link
-c Compile and assemble, but do not link
-o <file> Place the output into <file>
-x <language> Specify the language of the following input files
Permissible languages include: c c++ assembler none
'none' means revert to the default behavior of
guessing the language based on the file's extension
Options starting with -g, -f, -m, -O, -W, or --param are automatically
passed on to the various sub-processes invoked by g++. In order to pass
other options on to these processes the -W<letter> options must be used.
For bug reporting instructions, please see:
<URL:http://bugs.gentoo.org/>.
|
_________________
Spiros
Last edited by Spiros on Wed Feb 04, 2009 1:24 pm; edited 1 time in total |
|
| Back to top |
|
 |
mack1
Guru
Joined: 18 Mar 2006
Posts: 315
|
| Posted: Wed Feb 04, 2009 12:54 pm Post subject: |
|
|
Se hai gcc 4.3*, controlla la tua versione di gcc.
Comunque prova con:
La versione stabile in portage è gcc-4.1.2 e non supporta core2.
Se hai la necessità di creare codice generico -mtune va bene, ma normalmente si usa -march.
per le CFLAGS guarda qui:
http://en.gentoo-wiki.com/wiki/Safe_Cflags
Ciao |
|
| Back to top |
|
|
Spiros
Apprentice
Joined: 11 Mar 2008
Posts: 189
Location: Zurich
|
| Posted: Wed Feb 04, 2009 1:23 pm Post subject: [solved] |
|
|
Sì, ho la 4.1.2. E non sono supportati neanche generic o native? Sono andato a vedere e dice di usare nocona. Effettivamente funziona. Grazie.
_________________
Spiros |
|
| Back to top |
|
|
k01
Arch/Herd Tester
Joined: 13 Feb 2008
Posts: 619
Location: Milano
|
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
|
|
Forum italiano (Italian)
