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stelth
n00b
Joined: 25 May 2006
Posts: 45
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 Posted: Sat Oct 24, 2009 3:35 pm Post subject: Which gcc profile? |
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I just updated my kernel (successfully, which was a surprise, I swear my machine is haunted).
The kernel wouldn't compile until I switched the gcc profile to sparc64-unknown-linux-gnu-4.3.3
I also noticed that the default selected gcc profile was sparc--unknown-linux-gnu-4.3.2.
Which profile should I be using for a 32-bit userland?
I tried the CROSS_COMPILE=sparc64-unknown-linux-gnu- while the 32-bit profile was selected, and was always met with a compiler not found error. I know I can put the entire path to the compiler in the CROSS_COMPILE variable, but didn't have an issue with this while installing, or on one previous kernel upgrade.
What should I set as the gcc profile for normal compiling, and will I need to switch it each time when compiling the kernel?
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| Quote: | | And on the 3rd day, God created the Remington bolt-action rifle; so that man could fight the dinosaurs and the homosexuals. AMEN. |
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SamuliSuominen
Retired Dev
Joined: 30 Sep 2005
Posts: 2133
Location: Finland
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| Posted: Sat Oct 24, 2009 4:14 pm Post subject: |
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| Isn't that what sys-devel/kgcc64 is for? |
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tcunha
Retired Dev
Joined: 02 Apr 2007
Posts: 128
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| Posted: Wed Oct 28, 2009 4:10 pm Post subject: Re: Which gcc profile? |
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| Quote: | | The kernel wouldn't compile until I switched the gcc profile to sparc64-unknown-linux-gnu-4.3.3 |
Right. That's because gcc-config configures your system so you can use that compiler properly (eg append the compiler's path to the PATH environment variable).
| Quote: | | I also noticed that the default selected gcc profile was sparc--unknown-linux-gnu-4.3.2. |
This is right, as well.
| Quote: | | Which profile should I be using for a 32-bit userland? |
They should be both selected when you use gcc-config -l, because on Gentoo (and, AFAIK on other Linux distributions) the kernel is 64-bit, and the userland is 32-bit (I think I remember seeing an experimental Debian project with a 64-bit userland). Now, the one which has a green star represents your userland compiler (32-bit), and the blue one, is your cross-compiler (64-bit) which is installed, as ssuominen said, by sys-devel/kgcc64.
There's an experimental multilib profile. You'd able to compile, and run 64-bit code, but the userland will remain 32-bit (GCC uses -m32 by default). Therefore, and since GCC will be bi-arch, you'll get rid of sys-devel/kgcc64.
| Quote: | | I tried the CROSS_COMPILE=sparc64-unknown-linux-gnu- while the 32-bit profile was selected, and was always met with a compiler not found error. I know I can put the entire path to the compiler in the CROSS_COMPILE variable, but didn't have an issue with this while installing, or on one previous kernel upgrade. |
Probably because it wasn't selected by gcc-config -l, and thus your environment wasn't properly configured.
| Quote: | | What should I set as the gcc profile for normal compiling, and will I need to switch it each time when compiling the kernel? |
They should be both selected. Nonetheless, when compiling a kernel >2.6.25, make sure you use make CROSS_COMPILE=sparc64-unknown-linux-gnu-.
HTH. |
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stelth
n00b
Joined: 25 May 2006
Posts: 45
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| Posted: Wed Oct 28, 2009 7:43 pm Post subject: |
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You're right, both are selected when looking closer at gcc-config -l
sparc-unknown-linux-gnu-4.3.2 has a green star next to it
sparc64-unknown-linux-gnu-4.3.3 has a blue star next to it
However, with both profiles selected, I'm still not able to compile a kernel even when passing CROSS_COMPILE=sparc64-unkown-linux-gnu- on the command line. This goes away if I select the 64-bit profile, do the kernel compile, then select the 32-bit profile again. I thought having both selected like that was to make it so I didn't have to keep switching profiles. Maybe I missed something in the install or something got borked in an update.
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| Quote: | | And on the 3rd day, God created the Remington bolt-action rifle; so that man could fight the dinosaurs and the homosexuals. AMEN. |
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Gentoo on Sparc
