From: hackbard Date: Sun, 25 Jul 2004 03:38:19 +0000 (+0000) Subject: added doc/CROSSBUILD - some guidelines X-Git-Url: https://hackdaworld.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3204473d0c122da0e311bea04573e8951bdc93a2;p=hdw-linux%2Fhdw-linux.git added doc/CROSSBUILD - some guidelines --- diff --git a/doc/CHANGELOG b/doc/CHANGELOG index 43028d6..f3b1504 100644 --- a/doc/CHANGELOG +++ b/doc/CHANGELOG @@ -1,5 +1,6 @@ *) 2004-07-25 +- added CROSSBUILD file - just some guidelines for hacking it the hdw way - fixed unrealircd package - do not build linux mandocs - removed unneeded libmustux patch diff --git a/doc/CROSSBUILD b/doc/CROSSBUILD new file mode 100644 index 0000000..0902dee --- /dev/null +++ b/doc/CROSSBUILD @@ -0,0 +1,59 @@ +# hdw - linux CROSS-BUILD howto + +with the toolchain concept introduced in version 0.3 of hdw-linux, +crosscompiling a minimal linux system - which will be used to continue with +native builds on the foreign architecture hardware - or even building complete +distributions for slow/embedded hardware should be possible. + +here are some guidelines for people developing for aliens. + +1) 'straight forward' crossbuilds + + - in Config file set: + o hdw_arch to the alien target architecture + o hdw_arch_opt and the supported cpu optimization + o hdw_crossbuild to "1", so the scripts know about it + + - hack ./scipts/Config file to fix/improve/support your alien architecture + + - add conditional actions to the toolchain and early base packages + + - for architecture specific patches: + o use -u option of diff + o create patches being applied in the package directory via p1 + o put these patches to config directory with ending .patch.${hdw_arch} + + - most important: submit your changes! + +2) 'tricky' crossbuilds (WTF? - yes, i just dont know any better word ... ) + + what are tricky crossbuilds? as i am not able to explain that, i will + just give you 2 examples: + + 1) + host system: sparc64 running 64bit kernel with 32bit userland + target system: sparc64 (including 64bit userland) + + 2) + host system: ia32 i686 + target system: ia32 i586 + + to get around some troubles here diffrent things were implemented: + + o misc/crossbuild/fake_utsname/ - a kernel module to fake the + uname output + o hdw_real_build - a config parameter that will cause the + --build configure flag to the real host system compilers + +as you see, crossbuilds are still devel. feel free to hack the scripts, ask +questions or even kill me for that braindead implementations. + +interesting files: +Config +scripts/Config +scripts/optimize +packages/toolchain/* +misc/crossbuild/fake_utsname/* + +have fun, hackbard. +