travis: spawn 2 separate windows instances

.travis.yml

@@ -2,6 +2,7 @@ language: c
 matrix:
   include:
     - os: linux
+      name: "linux"
       dist: xenial
       sudo: required
       addons:
@@ -17,9 +18,15 @@ matrix:
             - libfreetype6-dev
             - libssl-dev
     - os: windows
-      language: sh
+      name: "windows_gcc"
+      language: bash
+      filter_secrets: false
+    - os: windows
+      name: "windows_msvc"
+      language: bash
       filter_secrets: false
     - os: osx
+      name: "osx"
       osx_image: xcode10.3
       addons:
         homebrew:
@@ -38,10 +45,21 @@ script:
     fi
   - |
     if [[ "${TRAVIS_OS_NAME}" == "windows" ]]; then
+      ### troubleshooting and diagnostics: show ALL environment variables in the instance
+      #set
       set -e
       git clone --depth=1 https://github.com/ubawurinna/freetype-windows-binaries  thirdparty/freetype/
-      echo "Just running ./make.bat to produce v.exe"
-      ./make.bat
+      
+      if [[ "${TRAVIS_JOB_NAME}" == "windows_gcc" ]]; then
+        echo "Building V with GCC"
+        export VFLAGS="-os windows"
+        ./make.bat -gcc
+      fi
+      if [[ "${TRAVIS_JOB_NAME}" == "windows_msvc" ]]; then
+        echo "Building V with MSVC"
+        export VFLAGS="-os msvc"
+        ./make.bat -msvc
+      fi
       ./v.exe -o v2.exe compiler
       ./v2.exe -o v3.exe compiler
       ./v3.exe -o v4.exe compiler
@@ -49,20 +67,17 @@ script:
       ls -la v2.exe
       ls -la v3.exe
       ls -la v4.exe
-      echo "Running v test v..."
+      
+      ### running just repl_test.v produces failing results earlier and is easier to read
+      echo "Running only the repl tests directly..."
+      ./v.exe ./compiler/tests/repl/repl_test.v
+      echo "Running ALL tests..."
       ./v.exe test v
-      echo "Running v -os msvc test v..."
-      #./v -os msvc test v
-      ##echo "Running only the repl tests directly"
-      ##./v.exe ./compiler/tests/repl/repl_test.v
-      echo "Testing gcc bootstrapping"
-      ./make.bat -gcc
       set +e
     fi
   - |
     if [[ "${TRAVIS_OS_NAME}" != "windows" ]]; then
       make
-      #./v install glfw
       ./v test v
     fi
   - |

compiler/cheaders.v

@@ -64,8 +64,9 @@ CommonCHeaders = '
 #define _Atomic volatile
 
 // MSVC cannot parse some things properly
-//#undef EMPTY_STRUCT_DECLARATION
-//#define EMPTY_STRUCT_DECLARATION void *____dummy_variable
+#undef EMPTY_STRUCT_DECLARATION
+#define EMPTY_STRUCT_DECLARATION void *____dummy_variable
+
 #undef OPTION_CAST
 #define OPTION_CAST(x)
 #endif

compiler/gen_c.v

@@ -329,6 +329,9 @@ fn (p mut Parser) gen_struct_init(typ string, t Type) bool {
 		}
 		else {
 			p.gen('($typ) {')
+			if t.fields.len == 1 && t.fields[0].name == '' && t.fields[0].typ.starts_with('EMPTY_STRUCT_DECLARATION') {
+				p.gen(' 0 /* v empty struct initialization */ ')
+			}
 		}
 	}
 	else {