initial commit

Signed-off-by: Peter Siegmund <mars3142@noreply.mars3142.dev>

libs/wxWidgets-3.3.1/build/tools/autoconf/Dockerfile

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+FROM alpine:3.13
+
+RUN apk add autoconf
+
+# wxWidgets sources must be mounted here.
+VOLUME /wx
+
+WORKDIR /wx
+
+CMD ["autoconf"]

libs/wxWidgets-3.3.1/build/tools/autoconf/README.md

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+# Docker container for running autoconf
+
+## Rationale
+
+We store generated `configure` in Git to make it simpler for people to build
+wxWidgets without having to run autoconf themselves first, but this means that
+generating it on another system often results in insignificant changes just due
+to a different version of autoconf being used. By using this container, we can
+use the same version everywhere.
+
+
+## Using Pre-Made Image
+
+To use this container, you can pull it from Docker registry and run it
+directly by executing the following command from the top-level wx directory:
+
+```shell
+$ podman run -v `pwd`:/wx --rm docker.io/vadz/autoconf-for-wx
+```
+
+or, if you prefer to use podman:
+
+```shell
+$ docker run -v `pwd`:/wx --rm vadz/autoconf-for-wx
+```
+
+
+## Build
+
+You can also build the container yourself easily using the Dockerfile in this
+directory, just run
+
+```shell
+$ docker build -t autoconf-for-wx build/tools/autoconf
+```
+
+This should (quickly) finish with
+```
+Successfully tagged autoconf-for-wx:latest
+```
+
+
+## Updating autoconf version
+
+When we decide to switch to a newer autoconf version, we should update the
+`Dockerfile` here to use a later version of Alpine Linux: the currently used
+version is specifically chosen because it has the package with the latest
+version of autoconf 2.69.