Feature/external compiler reporting (#776)

* Added support for converting SlangResult to string in PlatformUtil.

* * Added reportExternalCompilerError
* Made external compilers use this
* Made DiagnosticSink accept UnownedStringSlice
* Made emitXXX compiler functions return SlangError
* Use smart pointers to handle life of Com interfaces

* * Make SlangResult compatible with HRESULT for some common cases.
* Make PlatformUtil::appendResult return SlangResult
* Compile check SLANG_RESULT.

* Add tests for checking diagnostics from external compilers.

* * Make external compiler tests only run on windows for now.
* Added 'windows' and 'unix' categories

* Added categories based on what backends are available. Will make more tests run on linux and handle case where dxcompiler is not available on appveyor.

* * Added spSessionCheckPassThroughSupport
* Use to determine whats available for categories for tests

* Add support for outputting source filename/s when using pass through.

6 files changed, 47 insertions, 0 deletions

diff --git a/tests/cross-compile/dxc-error.hlsl b/tests/cross-compile/dxc-error.hlsl
new file mode 100644
index 000000000..fb22907c6
--- /dev/null
+++ b/tests/cross-compile/dxc-error.hlsl
@@ -0,0 +1,9 @@
+//TEST(dxc):SIMPLE:-pass-through dxc -target dxil -entry computeMain -stage compute -profile sm_6_1 
+
+[numthreads(4, 1, 1)]
+void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
+{
+	uint tid = dispatchThreadID.x;
+    // Error should be here... as gOutputBuffer is not defined...
+	gOutputBuffer[tid] = dispatchThreadID.x * 0.5f;
+}
\ No newline at end of file
diff --git a/tests/cross-compile/dxc-error.hlsl.expected b/tests/cross-compile/dxc-error.hlsl.expected
new file mode 100644
index 000000000..f9f565393
--- /dev/null
+++ b/tests/cross-compile/dxc-error.hlsl.expected
@@ -0,0 +1,8 @@
+result code = -1
+standard error = {
+dxc: tests/cross-compile/dxc-error.hlsl:9:2: error: use of undeclared identifier 'gOutputBuffer'
+        gOutputBuffer[tid] = dispatchThreadID.x * 0.5f;
+        ^
+}
+standard output = {
+}
diff --git a/tests/cross-compile/fxc-error.hlsl b/tests/cross-compile/fxc-error.hlsl
new file mode 100644
index 000000000..a8d55fbe7
--- /dev/null
+++ b/tests/cross-compile/fxc-error.hlsl
@@ -0,0 +1,9 @@
+//TEST(fxc):SIMPLE:-pass-through fxc -target dxbc -entry computeMain -stage compute -profile sm_5_1 
+
+[numthreads(4, 1, 1)]
+void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
+{
+	uint tid = dispatchThreadID.x;
+    // Error should be here... as gOutputBuffer is not defined...
+	gOutputBuffer[tid] = dispatchThreadID.x * 0.5f;
+}
\ No newline at end of file
diff --git a/tests/cross-compile/fxc-error.hlsl.expected b/tests/cross-compile/fxc-error.hlsl.expected
new file mode 100644
index 000000000..b3fa55696
--- /dev/null
+++ b/tests/cross-compile/fxc-error.hlsl.expected
@@ -0,0 +1,6 @@
+result code = -1
+standard error = {
+fxc: tests/cross-compile/fxc-error.hlsl(8,2-14): error X3004: undeclared identifier 'gOutputBuffer'
+}
+standard output = {
+}
diff --git a/tests/cross-compile/glslang-error.glsl b/tests/cross-compile/glslang-error.glsl
new file mode 100644
index 000000000..c7d709442
--- /dev/null
+++ b/tests/cross-compile/glslang-error.glsl
@@ -0,0 +1,7 @@
+//TEST(glslang):SIMPLE:-pass-through glslang -target spirv -entry compute -stage compute -profile sm_5_1 
+#version 450
+
+void main()
+{
+    int a = !;
+}
diff --git a/tests/cross-compile/glslang-error.glsl.expected b/tests/cross-compile/glslang-error.glsl.expected
new file mode 100644
index 000000000..9a11a6967
--- /dev/null
+++ b/tests/cross-compile/glslang-error.glsl.expected
@@ -0,0 +1,8 @@
+result code = -1
+standard error = {
+glslang: ERROR: tests/cross-compile/glslang-error.glsl:6: '' :  syntax error, unexpected SEMICOLON
+ERROR: 1 compilation errors.  No code generated.
+
+}
+standard output = {
+}