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On Wed, 2005-09-28 at 07:16 -0700, Dan Kegel wrote: > Robert P. J. Day wrote: > > working my way thru the crosstool code, i'm trying to understand the > > layout of a build's "results" directory. using my example again, i > > get a results directory with the structure: > > > > results/ > > gcc-4.0.1-glibc-2.3.5/ TOOLCOMBO > > sh3-unknown-linux-gnu/ TARGET > > ... the actual toolchain and intermediate stuff here ... > > > > with the variable > > > > PREFIX=<results dir>/${TOOLCOMBO}/${TARGET} > > > > fair enough thus far but it's not clear why there's yet *another* > > subdirectory there with the name: > > > > ${PREFIX}/${TARGET} > > > > which means the directory "sh3-unknown-linux-gnu" has a subdirectory > > with the same name, which would seem kind of redundant. > > I wasn't quite sure multiple installations of gcc for > different targets could really coexist in the same PREFIX, With recent GCC's, they can. Former versions repeatedly had (different) problems with it. > so I use a different PREFIX for each. > Once we verify this works, we can set PREFIX to simply > <results dir>/${TOOLCOMBO} An even more agressive approach is possible with GCC, binutils and gdb (I am not using crosstools and don't build linux targets, so I don't know about glibc): configure --prefix=/usr --enable-version-specific-runtime-libs \ --target=<target> <more> works. I have ca. 10 different cross compilers (linux to RTEMS, freebsd, cygwin, ...) installed in parallel having been configured this way. > I'm pretty sure there are a couple of loose ends that > keep this from working as intended for all versions of > gcc. Yes, ... the newer the GCC is the better it works. GCC >= 4.0.0 is pretty clean. GCC-3.x version have some minor problems and gcc-2.x, well ... it's dead ... Ralf ------ Want more information? See the CrossGCC FAQ, http://www.objsw.com/CrossGCC/ Want to unsubscribe? Send a note to crossgcc-unsubscribe@sources.redhat.com
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