User:Fabled: Difference between revisions

Latest revision as of 09:17, 25 September 2013

Bootstrapping new architectures

abuild, since 2.17.0, more or less supports creating cross-compiler and cross-compiling. That still needs a little bit of polishing, same goes to my scripts. All my scripts and example configs are located at http://dev.alpinelinux.org/~tteras/bootstrap

Decide on toolchain name (triplet), and update gcc aport to add proper configure flags for it
Create cross compiler
- Write abuild-createcross-$ARCH.conf for it, and use createcross-toolchain.sh to create a cross-compiler.
Cross compile minimal system image
- With above generated toolchain, you can use crossbuild-alpine-bootstrap.sh to create the minimal image.
Setup new box
- If running on new hardware, you also need to prepare kernel images, initramfs and modloop to create the initial bootimage.
- If running as vserver guest, you can just install the .apks from previous step.
- Setup builder.

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 ==Bootstrapping new architectures==
+abuild, since 2.17.0, more or less supports creating cross-compiler and cross-compiling.
+That still needs a little bit of polishing, same goes to my scripts.
+All my scripts and example configs are located at http://dev.alpinelinux.org/~tteras/bootstrap
+# Decide on toolchain name (triplet), and update gcc aport to add proper configure flags for it
 # Create cross compiler
-#* I decided to use crosstool-ng as build cross-compiler is tricky
+#* Write abuild-createcross-$ARCH.conf for it, and use createcross-toolchain.sh to create a cross-compiler.
-#** Wrote patch to support musl as C-library
-#** Wrote patch to enable building toolchains with PIE as default
-#* Create crosstool-ng .config, [http://dev.alpinelinux.org/~tteras/crosstool-ng-alpine-arm.config My ARM config]
-#** NOTE: for some reason binutils gold linker crashes when compiling gcc, so needed to keep it disabled.
-#* run 'ct-ng build' to build the new tool chain
 # Cross compile minimal system image
-#* abuild and core APKBUILDs modified to support cross building
+#* With above generated toolchain, you can use crossbuild-alpine-bootstrap.sh to create the minimal image.
-#* Wrote [http://dev.alpinelinux.org/~tteras/crossbuild-alpine-bootstrap.sh crossbuild-alpine-bootstrap.sh] to invoke abuild with cross-compiler
+# Setup new box
-#* Cross-building script uses abuild.conf overlay to define new target [http://dev.alpinelinux.org/~tteras/abuild-cross-armel.conf My ARM overlay]
+#* If running on new hardware, you also need to prepare kernel images, initramfs and modloop to create the initial bootimage.
-#* This produces all core .apk files for the target platform that can be used to boot qemu, qemu-user target or native hardware
+#* If running as vserver guest, you can just install the .apks from previous step.
-# Rebuild system and setup builder
+#* Setup builder.
-#* Decided to use qemu-user for ARM as it the fastest option available for us (no fast native hardware yet)
-#* Setup qemu-arm support for target chroot
-#*# apk --arch x86 --root $chroot/qemu --initdb add qemu-arm
-#*# cd $chroot/lib ; ln -s ../qemu/lib/ld-* .
-#*# ldconfig -r $chroot /qemu/lib /qemu/usr/lib
-#*# create binfmt_misc mapping
-#*# seems qemu-user needs to access /proc/sys/vm/mmap_min_addr or it does not work
-#* Setup target main chroot
-#** apk --arch arm --root $chroot --initdb add alpine-base build-base
-#** enter chroot