doc: move aix7.2 setup docs

Author: rvagg

doc/non-ansible-configuration-notes.md

@@ -216,3 +216,95 @@ Also ensure that /usr/local/bin is included in the `JENKINS_PATH` set in /etc/in
 [`ansible.intro_windows`]: http://docs.ansible.com/ansible/intro_windows.html
 [newer Ansible configuration]: https://github.com/nodejs/build/tree/master/ansible
 [stand-alone]: https://github.com/nodejs/build/tree/master/setup/windows
+
+## AIX 7.2
+
+To set up, basically:
+
+1. Run ansible
+2. Run through ansible/aix61-standalone/manualBootstrap.md, doing the steps marked as
+   relevant to AIX 7.2
+
+The manual setup curls some pre-built distributables, the following describes
+how they were created.
+
+### Preparing gcc distributables
+
+1. download gcc-c++ (with dependencies) from bullfreeware.com
+2. scp 15412gcc-c++-6.3.0-1.aix7.2.ppc.rpm-with-deps.zip TARGET:/ramdisk0
+   - Note: / is too small
+3. unzip 15412gcc-c++-6.3.0-1.aix7.2.ppc.rpm-with-deps.zip
+4. contained wrong libstdc++-9.1, so downloaded bundle for libstdc++ 6.3.0-1
+5. unpack the RPMs:
+        $ for f in *gcc* *stdc*; do rpm2cpio $f | /opt/freeware/bin/cpio_64 -idmv; done
+5. Find absolute symlinks, and make them relative, example:
+	$ find . -type l | xargs file
+	./opt/freeware/lib/gcc/powerpc-ibm-aix7.2.0.0/6.3.0/ppc64/libatomic.a: symbolic link to /opt/freeware/lib/gcc/powerpc-ibm-aix7.2.0.0/6.3.0/libatomic.a.
+	./opt/freeware/lib/gcc/powerpc-ibm-aix7.2.0.0/6.3.0/ppc64/libgcc_s.a: symbolic link to /opt/freeware/lib/gcc/powerpc-ibm-aix7.2.0.0/6.3.0/libgcc_s.a.
+	./opt/freeware/lib/gcc/powerpc-ibm-aix7.2.0.0/6.3.0/ppc64/libstdc++.a: symbolic link to /opt/freeware/lib/gcc/powerpc-ibm-aix7.2.0.0/6.3.0/libstdc++.a.
+	./opt/freeware/lib/gcc/powerpc-ibm-aix7.2.0.0/6.3.0/ppc64/libsupc++.a: symbolic link to /opt/freeware/lib/gcc/powerpc-ibm-aix7.2.0.0/6.3.0/libsupc++.a.
+	./opt/freeware/lib/gcc/powerpc-ibm-aix7.2.0.0/6.3.0/pthread/ppc64/libatomic.a: symbolic link to /opt/freeware/lib/gcc/powerpc-ibm-aix7.2.0.0/6.3.0/pthread/libatomic.a.
+	./opt/freeware/lib/gcc/powerpc-ibm-aix7.2.0.0/6.3.0/pthread/ppc64/libgcc_s.a: symbolic link to /opt/freeware/lib/gcc/powerpc-ibm-aix7.2.0.0/6.3.0/pthread/libgcc_s.a.
+	./opt/freeware/lib/gcc/powerpc-ibm-aix7.2.0.0/6.3.0/pthread/ppc64/libstdc++.a: symbolic link to /opt/freeware/lib/gcc/powerpc-ibm-aix7.2.0.0/6.3.0/pthread/libstdc++.a.
+	./opt/freeware/lib/gcc/powerpc-ibm-aix7.2.0.0/6.3.0/pthread/ppc64/libsupc++.a: symbolic link to /opt/freeware/lib/gcc/powerpc-ibm-aix7.2.0.0/6.3.0/pthread/libsupc++.a.
+	bash-5.0# pwd
+	/ramdisk0/aixtoolbox/opt/freeware/lib/gcc/powerpc-ibm-aix7.2.0.0/6.3.0/ppc64
+	bash-5.0# ln -fs ../libatomic.a ../libgcc_s.a ../libstdc++.a ../libsupc++.a ./
+	bash-5.0# find . -type l | xargs file
+	./ppc64/libatomic.a: archive (big format)
+	./ppc64/libgcc_s.a: archive (big format)
+	./ppc64/libstdc++.a: archive (big format)
+	./ppc64/libsupc++.a: archive (big format)
+	./pthread/ppc64/libatomic.a: symbolic link to /opt/freeware/lib/gcc/powerpc-ibm-aix7.2.0.0/6.3.0/pthread/libatomic.a.
+	./pthread/ppc64/libgcc_s.a: symbolic link to /opt/freeware/lib/gcc/powerpc-ibm-aix7.2.0.0/6.3.0/pthread/libgcc_s.a.
+	./pthread/ppc64/libstdc++.a: symbolic link to /opt/freeware/lib/gcc/powerpc-ibm-aix7.2.0.0/6.3.0/pthread/libstdc++.a.
+	./pthread/ppc64/libsupc++.a: symbolic link to /opt/freeware/lib/gcc/powerpc-ibm-aix7.2.0.0/6.3.0/pthread/libsupc++.a.
+	bash-5.0# cd pthread/ppc64/
+	bash-5.0# ln -fs ../libatomic.a ../libgcc_s.a ../libstdc++.a ../libsupc++.a ./
+	bash-5.0# file *.a
+	libatomic.a: archive (big format)
+	libgcc.a: archive (big format)
+	libgcc_eh.a: archive (big format)
+	libgcc_s.a: archive (big format)
+	libgcov.a: archive (big format)
+	libstdc++.a: archive (big format)
+	libsupc++.a: archive (big format)
+6. Move to target location and create a tarball with no assumptions on leading
+path prefix:
+        $ mkdir /opt/gcc-6.3
+	$ cd /opt/gcc-6.3
+	$ mv .../opt/freeware/* ./
+	$ tar -cvf ../gcc-6.3-aix7.2.ppc.tar *
+
+
+Example above was for 6.3.0, but process for 4.8.5 is identical, other than
+the version numbers.
+
+Example search for 4.8.5 gcc on bullfreeware:
+- http://www.bullfreeware.com/?searching=true&package=gcc&from=&to=&libraries=false&exact=true&version=5
+
+### Preparing ccache distributables
+
+Notes:
+- AIX tar doesn't know about the "z" switch, so use GNU tar.
+- Build tools create 32-bit binaries by default, so explicitly create 64-bit
+  ones.
+
+	$ curl -L -O https://github.com/ccache/ccache/releases/download/v3.7.4/ccache-3.7.4.tar.gz
+	  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
+					 Dload  Upload   Total   Spent    Left  Speed
+	100   607    0   607    0     0   3281      0 --:--:-- --:--:-- --:--:--  3281
+	100  490k  100  490k    0     0   586k      0 --:--:-- --:--:-- --:--:-- 60.4M
+	$ /opt/freeware/bin/tar -xzf ccache-3.7.4.tar.gz
+	$ cd ccache-3.7.4
+	$ ./configure CC="gcc -maix64" && gmake
+	$ mkdir -p /opt/ccache-3.7.4/libexec /opt/ccache-3.7.4/bin
+	$ cp ccache /opt/ccache-3.7.4/bin
+	$ cd /opt/ccache-3.7.4/libexec
+	$ ln -s ../bin/ccache c++
+	$ ln -s ../bin/ccache cpp
+	$ ln -s ../bin/ccache g++
+	$ ln -s ../bin/ccache gcc
+	$ ln -s ../bin/ccache gcov
+	$ cd cd /opt/ccache-3.7.4
+	$ tar -cf /opt/ccache-3.7.4.aix7.2.ppc.tar.gz *