[gentoo-user] Re: emerge -e errors right after install
On 17/08/2013 08:38, Walter Dnes wrote:
I have the following in make.conf
CFLAGS=-O2 -march=native -fomit-frame-pointer -pipe -fno-unwind-tables
-fno-asynchronous-unwind-tables
CXXFLAGS=${CFLAGS}
...where -march=native will always work correctly for a local build.
The only possible worry is if you're cross-compiling and or distributing
a binary to multiple machines. It also saves me the headache of
figuring out the CFLAGS setting whenever I get a new machine. You still
have to set up the correct processor in the kernel, however.
While -march=native is generally good advice, GCC is not perfect and on
occasion it can flags to be enabled that are not supported, resulting in
the invalid instruction error.
Re: [gentoo-user] Re: emerge -e errors right after install
2013/8/16 Walter Dnes waltd...@waltdnes.org
On Fri, Aug 16, 2013 at 03:18:35PM -0300, Francisco Ares wrote
You were right. I have overlooked the type of the new machine's CPU (it
is
a Pentium(R) Dual-Core CPU and the other one, already working, is a
Intel(R) Core(TM)2 Duo CPU). So, a march=nocona instead of a
march=core2 seems to have solved the problem.
I have the following in make.conf
CFLAGS=-O2 -march=native -fomit-frame-pointer -pipe -fno-unwind-tables
-fno-asynchronous-unwind-tables
CXXFLAGS=${CFLAGS}
...where -march=native will always work correctly for a local build.
The only possible worry is if you're cross-compiling and or distributing
a binary to multiple machines. It also saves me the headache of
figuring out the CFLAGS setting whenever I get a new machine. You still
have to set up the correct processor in the kernel, however.
--
Walter Dnes waltd...@waltdnes.org
I don't run desktop environments; I run useful applications
Yes, that is the problem. I got the oldest CPU on witch the same binaries
will run. The newest uses an Intel I3, but the oldest ones run on a Dual
Core (not Core-2, as my first assumption).
Thanks for the other parameters though, I have never tried them. Gonna take
a look.
Francisco
Re: [gentoo-user] Re: emerge -e errors right after install
2013/8/17 Michael Palimaka kensing...@gentoo.org
On 17/08/2013 08:38, Walter Dnes wrote:
I have the following in make.conf
CFLAGS=-O2 -march=native -fomit-frame-pointer -pipe -fno-unwind-tables
-fno-asynchronous-unwind-**tables
CXXFLAGS=${CFLAGS}
...where -march=native will always work correctly for a local build.
The only possible worry is if you're cross-compiling and or distributing
a binary to multiple machines. It also saves me the headache of
figuring out the CFLAGS setting whenever I get a new machine. You still
have to set up the correct processor in the kernel, however.
While -march=native is generally good advice, GCC is not perfect and on
occasion it can flags to be enabled that are not supported, resulting in
the invalid instruction error.
Thanks, that is a good point to be aware of.
Francisco
[gentoo-user] Re: emerge -e errors right after install
On 16/08/2013 23:22, Francisco Ares wrote: 26892 Illegal instruction | $AWK -f $ac_tmp/subs.awk 31167 Illegal instruction | $AWK -f $tmp/subs.awk $tmp/out [...] I have built binary packages for sed and gawk, created in a machine with the same characteristics and configuration, and emerged those to the new machine. Even so, the errors keep coming. It could be an issue with faulty memory, or problem with glibc. Often though, illegal instruction is the result of a mismatch between the host, and the target for which the binary was compiled. This could be checked by comparing /proc/cpuinfo with your CFLAGs.
Re: [gentoo-user] Re: emerge -e errors right after install
2013/8/16 Michael Palimaka kensing...@gentoo.org On 16/08/2013 23:22, Francisco Ares wrote: 26892 Illegal instruction | $AWK -f $ac_tmp/subs.awk 31167 Illegal instruction | $AWK -f $tmp/subs.awk $tmp/out [...] I have built binary packages for sed and gawk, created in a machine with the same characteristics and configuration, and emerged those to the new machine. Even so, the errors keep coming. It could be an issue with faulty memory, or problem with glibc. Often though, illegal instruction is the result of a mismatch between the host, and the target for which the binary was compiled. This could be checked by comparing /proc/cpuinfo with your CFLAGs. Thanks, gonna check that. Francisco
Re: [gentoo-user] Re: emerge -e errors right after install
2013/8/16 Francisco Ares fra...@gmail.com 2013/8/16 Michael Palimaka kensing...@gentoo.org On 16/08/2013 23:22, Francisco Ares wrote: 26892 Illegal instruction | $AWK -f $ac_tmp/subs.awk 31167 Illegal instruction | $AWK -f $tmp/subs.awk $tmp/out [...] I have built binary packages for sed and gawk, created in a machine with the same characteristics and configuration, and emerged those to the new machine. Even so, the errors keep coming. It could be an issue with faulty memory, or problem with glibc. Often though, illegal instruction is the result of a mismatch between the host, and the target for which the binary was compiled. This could be checked by comparing /proc/cpuinfo with your CFLAGs. Thanks, gonna check that. Francisco You were right. I have overlooked the type of the new machine's CPU (it is a Pentium(R) Dual-Core CPU and the other one, already working, is a Intel(R) Core(TM)2 Duo CPU). So, a march=nocona instead of a march=core2 seems to have solved the problem. Thank you! Francisco
Re: [gentoo-user] Re: emerge -e errors right after install
On Fri, Aug 16, 2013 at 03:18:35PM -0300, Francisco Ares wrote
You were right. I have overlooked the type of the new machine's CPU (it is
a Pentium(R) Dual-Core CPU and the other one, already working, is a
Intel(R) Core(TM)2 Duo CPU). So, a march=nocona instead of a
march=core2 seems to have solved the problem.
I have the following in make.conf
CFLAGS=-O2 -march=native -fomit-frame-pointer -pipe -fno-unwind-tables
-fno-asynchronous-unwind-tables
CXXFLAGS=${CFLAGS}
...where -march=native will always work correctly for a local build.
The only possible worry is if you're cross-compiling and or distributing
a binary to multiple machines. It also saves me the headache of
figuring out the CFLAGS setting whenever I get a new machine. You still
have to set up the correct processor in the kernel, however.
--
Walter Dnes waltd...@waltdnes.org
I don't run desktop environments; I run useful applications
