I think this only has a minor affect on Thunderbird/SeaMonkey but I think we probably want to port the configure.in change. +++ This bug was initially created as a clone of Bug #773865 +++ The `MOZ_WINCONSOLE` env var is used to determine whether the application being built should be built as a console app or as a Windows app [1]. In some files, `MOZ_WINCONSOLE` is used as a preprocessor definition [2][3][4]. Setting up the preprocessor definition requires modifying the makefile of each module that wants to use the definition, e.g. [5]. In some cases we are not doing this correctly. For example, in browser/app/nsBrowserApp.cpp, it is currently impossible for the `#ifdef MOZ_WINCONSOLE` branch to be compiled. The attached patch changes config.mk to set up the preprocessor definition `MOZ_WINCONSOLE` if the env var is 1. [1] https://mxr.mozilla.org/mozilla-central/source/config/config.mk?rev=88aaf6c529b9#583 [2] https://mxr.mozilla.org/mozilla-central/source/xulrunner/stub/nsXULStub.cpp?rev=a15d75939cd5#56 [3] https://mxr.mozilla.org/mozilla-central/source/xulrunner/app/nsXULRunnerApp.cpp?rev=3f408698a03f#52 [4] https://mxr.mozilla.org/mozilla-central/source/browser/app/nsBrowserApp.cpp?rev=601e2a3564ac#46 [5] https://mxr.mozilla.org/mozilla-central/source/xulrunner/app/Makefile.in#60

Sorry, can't build on Windows.

Porting most configure options is unnecessary these days.