Example Makefile.def file
From GiderosMobile
QTBASEDIR=/c/Qt
#export PATH=$PATH:~/Android_SDK/NDK/
# on Windows, also add this to PATH
NDK_HOME=/c/android-ndk
NDKBUILD=cmd //c /c/android-ndk/ndk-build.cmd
# remember to escape disallowed characters, or wrap in quotes
JAVA_HOME=/c/Program\ Files\ \(x86\)/Java/jdk1.8.0_181
ANT_HOME=/c/apache-ant-1.10.5
ANDROID_HOME=C:/Users/antho/AppData/Local/Android/Sdk
FXC="/c/Program Files (x86)/Windows Kits/8.1/bin/x86/fxc.exe"
FXCx64="/c/Program Files (x86)/Windows Kits/8.1/bin/x64/fxc.exe"
MSBUILD="/c/Program Files (x86)/MSBuild/14.0/Bin/MSBuild.exe"
EMSDK=/c/emsdk
EMSDKPATH=$(EMSDK):$(EMSDK)/clang/e1.38.12_64bit:$(EMSDK)/node/8.9.1_64bit/bin:$(EMSDK)/python/2.7.13.1_64bit/python-2.7.13.amd64:$(EMSDK)/emscripten/1.38.12:/c/cmake-3.12.3-win32-x86/bin
EMSDK_PREFIX=PATH=$(EMSDKPATH):$$$$PATH
#EMSDK_PREFIX+=BINARYEN_ROOT=$(EMSDK)/clang/e1.38.12_64bit/binaryen
#EMSDK_PREFIX+=EMSDK=$(EMSDK)
#EMSDK_PREFIX+=EMSCRIPTEN=$(EMSDK)/emscripten/1.38.12
#EMSDK_PREFIX+=EMSCRIPTEN_ROOT=$(EMSDK)/emscripten/incoming
#EMSDK_PREFIX+=JAVA=$(EMSDK)/emscripten/java/8.152_64bit/bin/java.exe
EMSDK_PREFIX+=cmd //c
CRUNCHME=crunchme-qt-win.exe
STEAMSDK=/c/steamworks_sdk_142
export STEAMSDK
NSIS=cmd //c "/c/Program Files (x86)/NSIS/makensis.exe"
WIN_SIGN="/c/Program Files (x86)/Windows Kits/10/bin/x86/signtool.exe"
WIN_KEYSTORE=/c/comodo-code-signing.p12
WIN_KEYPASS=xxxx
WIN_KEYTSS="http://timestamp.comodoca.com"
MAC_HOST=user@host
MAC_PATH=gideros/gideros
OSX_SIGNING_IDENTITY="ID"
OSX_SIGNING_PASSWORD="keychain password"
QT_ARCH=mingw53_32
QT_TOOLSARCH=mingw530_32
QTVER=5.10.1
QT5ICUVER=59 #deprecated stuff