AppVeyor: add classic MinGW build

But use the MSYS2 shell rather than the default MSYS shell because of
POSIX path conversion issues. Classic MinGW is only available on the
Visual Studio 2015 image.

Closes https://github.com/curl/curl/pull/3623

diff --git a/appveyor.yml b/appveyor.yml
index b010ddb4195777419d470ffea63a3759ed9f60a2..7681308e2938c1586f47af5c248b1714ca961c6e 100644 (file)
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -73,6 +73,17 @@ environment:
         DISABLED_TESTS: "!198"
         COMPILER_PATH: "C:\\mingw-w64\\x86_64-8.1.0-posix-seh-rt_v6-rev0\\mingw64\\bin"
         MSYS2_ARG_CONV_EXCL: "/*"
+      - APPVEYOR_BUILD_WORKER_IMAGE: "Visual Studio 2015"
+        PRJ_GEN: "MSYS Makefiles"
+        PRJ_CFG: Debug
+        OPENSSL: OFF
+        WINSSL: OFF
+        HTTP_ONLY: OFF
+        TESTING: ON
+        SHARED: OFF
+        DISABLED_TESTS: ""
+        COMPILER_PATH: "C:\\MinGW\\bin"
+        MSYS2_ARG_CONV_EXCL: "/*"
 
 install:
     - set "PATH=C:\msys64\usr\bin;%PATH%"