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Cygwin: Add documentation

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There's a lot that can go wrong if you stray from
the path.

Signed-off-by: Ray Donnelly <mingw.android@gmail.com>
This commit is contained in:
Ray Donnelly 2015-11-05 06:44:43 +00:00
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@ -313,3 +313,49 @@ Here is an example commit message (see revision 8bb5151c5b01):
I missed refreshing the patch before pushing. :-(
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Using crosstool-NG on Windows |
------------------------------+
Contributed by: Ray Donnelly
Prerequisites and instructions for using crosstool-NG for building a cross
toolchain on Windows (Cygwin) as build and, optionally Windows (hereafter)
MinGW-w64 as host.
0. Use Cygwin64 if you can. DLL base-address problems are lessened that
way and if you bought a 64-bit CPU, you may as well use it.
1. You must enable Case Sensitivity in the Windows Kernel (this is only really
necessary for Linux targets, but at present, crosstool-ng refuses to operate
on case insensitive filesystems). The registry key for this is:
HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\kernel\obcaseinsensitive
Read more at:
https://cygwin.com/cygwin-ug-net/using-specialnames.html
2. Using setup{,-x86_64}.exe, install the default packages and also the
following ones: (tested versions in brackets, please test newer versions
and report successes via pull requests changing this list and failures to:
https://github.com/crosstool-ng/crosstool-ng/issues
autoconf (13-1), make (4.1-1), gcc-g++ (4.9.3-1), gperf (3.0.4-2),
bison (3.0.4-1), flex (2.5.39-1), texinfo (6.0-1), wget (1.16.3-1),
patch (2.7.4-1), libtool (2.4.6-2), automake (9-1), diffutils (3.3-3),
libncurses-devel (6.0-1.20151017), help2man (1.44.1-1)
mingw64-i686-gcc-g++* (4.9.2-2), mingw64-x86_64-gcc-g++* (4.9.2-2)
Leave "Select required packages (RECOMMENDED)" ticked.
Notes:
2.1 The packages marked with * are only needed if your host is MinGW-w64.
2.2 Unfortunately, wget pulls in an awful lot of dependencies, including
Python 2.7, Ruby, glib and Tcl.
3. Although nativestrict symlinks seem like the best idea, extracting glibc fails
when they are enabled, so just don't set anything here. If your host is MinGW-w64
then these 'Cygwin-special' symlinks won't work, but you can dereference them by
using tar options --dereference and --hard-dereference when making a final tarball.
I plan to investigate and fix or at least work around the extraction problem.
Read more at:
https://cygwin.com/cygwin-ug-net/using-cygwinenv.html
4. collect2.exe will attempt to run ld which is a shell script that runs either
ld.exe or gold.exe so you need to make sure that a working shell is in your path.
Eventually I will replace this with a native program for MinGW-w64 host.