[newlib-cygwin/main] Cygwin: Update the "building cygwin" FAQ

[Jon Turney]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=4d83d657388387443ab908e706bebe09d1fecfac

commit 4d83d657388387443ab908e706bebe09d1fecfac
Author: Jon Turney <jon.turney@dronecode.org.uk>
Date:   Thu Jun 5 12:14:37 2025 +0100

    Cygwin: Update the "building cygwin" FAQ
    
    Shorten the example path for clarity.
    
    Using --prefix rather than DESTDIR to select the install location is
    generically wrong (and specifically wrong because it causes an
    incorrectly prefixed /etc/cygserver.conf path to be baked into the
    cygserver built).
    
    Install using -j1 because... cygwin's install rules overwrite things
    installed by newlib, so running those in parallel can have undesired
    results. (something something tooldir something something)

Diff:
---
 winsup/doc/faq-programming.xml | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/winsup/doc/faq-programming.xml b/winsup/doc/faq-programming.xml
index 696a6462b..ac361839a 100644
--- a/winsup/doc/faq-programming.xml
+++ b/winsup/doc/faq-programming.xml
@@ -747,20 +747,20 @@ download the corresponding source package
 <para>You <emphasis>must</emphasis> build cygwin in a separate directory from
 the source, so create something like a <literal>build/</literal> directory.
 Assuming you checked out the source to
-<literal>/oss/src/newlib-cygwin/</literal>, and you want to install to the
-temporary location <literal>/oss/install/</literal>, these are the required
+<literal>/src/newlib-cygwin/</literal>, and you want to install to the
+temporary location <literal>/install/</literal>, these are the required
 steps to build Cygwin:
 </para>
+
 <screen>
-$ mkdir -p /oss/src/newlib-cygwin/build    # create build dir
-$ mkdir -p /oss/install                    # create install dir
-$ cd /oss/src/newlib-cygwin/winsup         # chdir into Cygwin source dir and...
-$ ./autogen.sh                             # create config files
-$ cd /oss/src/newlib-cygwin/build          # chdir into build dir
-$                                          # create makefiles...
-$ /oss/src/newlib-cygwin/configure --prefix=/oss/install
-$ make                                     # build Cygwin
-$ make install                             # install Cygwin into install dir
+$ mkdir -p /src/newlib-cygwin/build    # create build dir
+$ mkdir -p /install                    # create install dir
+$ cd /src/newlib-cygwin/winsup         # chdir into Cygwin source dir and...
+$ ./autogen.sh                         # create config files
+$ cd /src/newlib-cygwin/build          # chdir into build dir
+$ /src/newlib-cygwin/configure         # create makefiles...
+$ make                                 # build Cygwin
+$ make -j1 install DESTDIR=/install    # install Cygwin into install dir
 </screen>
 
 <para>