Generate Visual Studio projects using Premake (#557)

* Generate Visual Studio projects using Premake

This change adds a `premake5.lua` file that allows us to generate our Visual Studio solution using Premake 5 (https://premake.github.io/).
The existing Visual Studio solution/projects are now replaced with the Premake-generated ones, and project contributors will be expected to update these by running premake after adding/removing files.

I have *not* changed the Linux `Makefile` build at all, because that file is also used for things like running our tests, so that clobbering it with a premake-generated `Makefile` would break our continuous testing.
Hopefully future changes can switch to a generated `Makefile` and perhaps even add an XCode project as well.

Notes:

* The `build/slang-build.props` file is no longer needed/used, so it has been removed.

* The `slang-eval-test` test fixture wasn't following our naming conventions for its directory path, so it was updated to streamline the Premake build configuration work. This required changes to the `Makefile` as well

* Some seemingly unncessary preprocessor definitions that were specified for `core` and `slang-glslang` have been dropped. We will see if anything breaks from that.

* Possible fixup for Premake vpath issue

Premake's `vpath` feature seems to be nondeterministic about the order it applies filters (because Lua isn't deterministic about the order of entries in a key/value table), and as a result we can end up in a weird case where it decides that a `foo.cpp.h` file matches the `**.cpp` filter (I'm not sure why) before it tests against the `**.h` filter.

This change uses an (undocumented) Premake facility to set `vpath` using a list of singleton tables, which seems to fix the order in which things get tested.

* Remove support for "single-file" build of Slang

The `hello` example was the only bit of code that uses the "single-file" way of building Slang, and this had already run up against limitations of the Visual Studio compilers in its Debug|x64 build.
Rather than mess with Premake to make it pass through the `/bigobj` linker flag that is needed to work around the issue, it makes more sense just to stop using/supporting the feature since we wouldn't want users to depend on it anyway (our documentation no longer refers to it).

While I was at it I went ahead and made sure that the `SLANG_DYNAMIC` flag doesn't need to be set manually, so that instead there is a non-default `SLANG_STATIC` option (not that we have a static-library build of Slang at the moment).

1 files changed, 0 insertions, 133 deletions

diff --git a/tools/eval-test/main.cpp b/tools/eval-test/main.cpp
deleted file mode 100644
index e01d4441b..000000000
--- a/tools/eval-test/main.cpp
+++ /dev/null
@@ -1,133 +0,0 @@
-// main.cpp
-
-#include <assert.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include "../../source/core/secure-crt.h"
-#include <slang.h>
-
-int main(
-    int argc,
-    char** argv)
-{
-    // TODO: parse arguments
-
-    assert(argc >= 2);
-    char const* inputPath = argv[1];
-
-    // Slurp in the input file, so that we can compile and run it
-    FILE* inputFile;
-    fopen_s(&inputFile, inputPath, "rb");
-    assert(inputFile);
-
-    fseek(inputFile, 0, SEEK_END);
-    size_t inputSize = ftell(inputFile);
-    fseek(inputFile, 0, SEEK_SET);
-
-    char* inputText = (char*) malloc(inputSize + 1);
-    fread(inputText, inputSize, 1, inputFile);
-    inputText[inputSize] = 0;
-    fclose(inputFile);
-
-    // TODO: scan through the text to find comments,
-    // that instruct us how to generate input and
-    // consume output when running the test.
-
-    //
-
-    SlangSession* session = spCreateSession(nullptr);
-    SlangCompileRequest* request = spCreateCompileRequest(session);
-
-    spSetOutputContainerFormat(
-        request,
-        SLANG_CONTAINER_FORMAT_SLANG_MODULE);
-
-    int translationUnitIndex = spAddTranslationUnit(
-        request,
-        SLANG_SOURCE_LANGUAGE_SLANG,
-        nullptr);
-
-    spAddTranslationUnitSourceString(
-        request,
-        translationUnitIndex,
-        inputPath,
-        inputText);
-
-    int entryPointIndex = spAddEntryPoint(
-        request,
-        translationUnitIndex,
-        "main",
-        spFindProfile(session, "cs_5_0"));
-
-    if( spCompile(request) != 0 )
-    {
-        char const* output = spGetDiagnosticOutput(request);
-        fputs(output, stderr);
-        exit(1);
-    }
-
-    // Things compiled, so now we need to run them...
-
-    // Extract the bytecode
-    size_t bytecodeSize = 0;
-    void const* bytecode = spGetCompileRequestCode(request, &bytecodeSize);
-
-    // Now we need to create an execution context to go and run the bytecode we got
-
-    SlangVM* vm = SlangVM_create();
-
-    SlangVMModule* vmModule = SlangVMModule_load(
-        vm,
-        bytecode,
-        bytecodeSize);
-
-    SlangVMFunc* vmFunc = (SlangVMFunc*)SlangVMModule_findGlobalSymbolPtr(
-        vmModule,
-        "main");
-
-    int32_t*& inputArg = *(int32_t**)SlangVMModule_findGlobalSymbolPtr(
-        vmModule,
-        "input");
-
-    int32_t*& outputArg = *(int32_t**)SlangVMModule_findGlobalSymbolPtr(
-        vmModule,
-        "output");
-
-    SlangVMThread* vmThread = SlangVMThread_create(
-        vm);
-
-    int32_t inputData[8] = { 0, 1, 2, 3, 4, 5, 6, 7 };
-    int32_t outputData[8] = { 0 };
-
-    inputArg = inputData;
-    outputArg = outputData;
-
-    // TODO: set arguments based on specification from the user...
-    for (uint32_t threadID = 0; threadID < 8; ++threadID)
-    {
-#if 0
-        fprintf(stderr, "\n\nthreadID = %u\n\n", threadID);
-        fflush(stderr);
-#endif
-
-        SlangVMThread_beginCall(vmThread, vmFunc);
-
-        SlangVMThread_setArg(
-            vmThread,
-            0,
-            &threadID,
-            sizeof(threadID));
-
-        SlangVMThread_resume(vmThread);
-    }
-
-    for (uint32_t ii = 0; ii < 8; ++ii)
-    {
-        fprintf(stdout, "outputData[%u] = %d\n", ii, outputData[ii]);
-    }
-
-    spDestroyCompileRequest(request);
-    spDestroySession(session);
-
-    return 0;
-}