[lmi] PATCH for wxPdfDoc: ignore 'autom4te.cache' artifacts [Was: Use submodules for, and newer versions of, libxml2 and libxslt]

[Greg Chicares]

On 2020-10-01 16:21, Vadim Zeitlin wrote:
> On Thu, 1 Oct 2020 15:33:31 +0000 Greg Chicares <gchicares@sbcglobal.net> 
> wrote:
[...]
> GC> One oddity: after rerunning 'install_msw.sh', I notice this:
> GC> 
> GC> /opt/lmi/src/lmi[0]$git --no-pager diff
> GC> diff --git a/third_party/libxml2 b/third_party/libxml2
> GC> --- a/third_party/libxml2
> GC> +++ b/third_party/libxml2
> GC> @@ -1 +1 @@
> GC> -Subproject commit bdec2183f34b37ee89ae1d330c6ad2bb4d76605f
> GC> +Subproject commit bdec2183f34b37ee89ae1d330c6ad2bb4d76605f-dirty

[...]

> GC>   /opt/lmi/src/lmi/third_party/libxml2[0]$git status
> GC>   HEAD detached at bdec2183
> GC>   Untracked files:
> GC>     (use "git add <file>..." to include in what will be committed)
> GC>           compile
> GC> 
> GC>   nothing added to commit but untracked files present (use "git add" to 
> track)
> GC> 
> GC> How should we handle it?
> GC> 
> GC>  - Add this 'compile' file to third_party/libxml2/.gitignore , as I
> GC> suppose upstream should have done?
> 
>  Yes, they should have had, and they did in the latest version.

Similarly, building wxPdfDoc leaves artifacts in an 'autom4te.cache'
directory. The attached patch is my attempt to fix this in a way
consonant with wxWidgets.

I still have a detached HEAD:

  $ /opt/lmi/src/lmi/third_party/wxpdfdoc[0]$git status                         
           
  HEAD detached from acbd019
  nothing to commit, working tree clean

and it feels weird to push in that state, but I'll try anyway.

0001-Add-autom4te.cache-to-.gitignore.patch
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