On Fri, Sep 17, 2010 at 01:48:19PM +0400, Sergei Poselenov wrote: > - What exact target CPU it is built for? I see here > http://www.debian.org/ports/powerpc/inst/install the list of > supported machines, but how can I understand will the Debian binaries > work on my board with the specific CPU? > Is it possible, knowing only the specific CPU type (440, 603, 8540, > 8560, etc) to say will it run Debian PowerPC Distro or not? > (I understand that there should be a kernel supporting the specific > board; I'm rather interested in the instructions set used by GCC to > build the binary images for Debian powerpc distro. In short - what > "-mcpu=" GCC option is used for build?)
I believe "-mcpu=generic" is used, except for perhaps certain kernels. As you pointed out, if there's a kernel for it, Debian powerpc will run on that type of chip. There may be specially-compiled versions of some packages that use Altivec, but there should be a generic version for those as well. You can try running "gcc -v" and see what host, build, target, and with-tune are set to. > - We are considering to rebuild the Debian distribution, to > tune the packages for the specific CPU type (enable hardware FP > support, etc). > I now the Debian powerpc distro is built natively. Are there any > details of the build process available, so we could use it in our > build system? Normally when you build a package with dpkg-buildpackage, it sets certain environment variables to a default value (for example, CFLAGS=-g -O2). You may be able to modify that slightly for your needs. Note that that doesn't guarantee that the package in question won't override it. -- brian m. carlson / brian with sandals: Houston, Texas, US +1 832 623 2791 | http://www.crustytoothpaste.net/~bmc | My opinion only OpenPGP: RSA v4 4096b: 88AC E9B2 9196 305B A994 7552 F1BA 225C 0223 B187
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