[PATCH] Update FAQ listing required packages for building Cygwin

Jon Turney jon.turney@dronecode.org.uk
Wed Jun 29 14:18:00 GMT 2016

On 29/06/2016 09:04, Corinna Vinschen wrote:
> Hi Jon,
> On Jun 28 15:21, Corinna Vinschen wrote:
>> On Jun 28 13:39, Jon Turney wrote:
>>> docbook2X is now required for building documentation
>>> libiconv differences between x86_64 and x86 no longer exist
>> Please apply.
> Sorry, but that was not quite correct.  Apparently I only skimmed the
> log text, not the actual patch.  Doh.
> When building 32 bit Cygwin, you need the 64 bit Mingw compiler for
> cyglsa64.dll.  The reason is that 32 bit cyglsa.dll won't work on 64 bit
> systems, even if Cygwin itself is running under WOW64.  Since we don't
> know if the user runs Cygwin on 32 bit or under WOW64, we have to create
> *both* cyglsa DLLs for 32 bit Cygwin, while it's obviously sufficient to
> build only the 64 bit version for 64 bit Cygwin.

Yes, I somehow though it said mingw64-i686-gcc-core rather than 

How about the attached?

-------------- next part --------------
From e27cfa4631e9ff7ead7b417e87d160cc20c9d03e Mon Sep 17 00:00:00 2001
From: Jon Turney <jon.turney@dronecode.org.uk>
Date: Wed, 29 Jun 2016 15:08:19 +0100
Subject: [PATCH] Restore mingw64-x86_64-gcc-core in FAQ listing required

Restore mingw64-x86_64-gcc-core to requirements for 32-bit builds in FAQ
listing required packages, and give reason.

Signed-off-by: Jon Turney <jon.turney@dronecode.org.uk>
 winsup/doc/faq-programming.xml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/winsup/doc/faq-programming.xml b/winsup/doc/faq-programming.xml
index 1f595f8..c64ab4a 100644
--- a/winsup/doc/faq-programming.xml
+++ b/winsup/doc/faq-programming.xml
@@ -683,6 +683,7 @@ installed; you at least need <literal>gcc-g++</literal>, <literal>make</literal>
 <literal>perl</literal>, <literal>cocom</literal>, <literal>gettext-devel</literal>,
 <literal>libiconv-devel</literal> and <literal>zlib-devel</literal>.
 Building for 32-bit Cygwin also requires
+<literal>mingw64-x86_64-gcc-core</literal> (for building the cyglsa64 DLL for WoW64),
 <literal>mingw64-i686-gcc-g++</literal> and <literal>mingw64-i686-zlib</literal>.
 Building for 64-bit Cygwin also requires
 <literal>mingw64-x86_64-gcc-g++</literal> and

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