Enable emscripten builds to compile slang.dll to WebAssembly. (#5131)

* Compile fixes for Wasm

The issues are all are due to 'long' types being 32 bits on WASM.

- class members redeclared errors
- << with StringBuilder and unsigned long is ambiguous

This helps to address issue #5115.

* Use the host executable suffix for generators

Since the generators are run at build-time, we should not use CMAKE_EXECUTABLE_SUFFIX,
which is the suffix for the target platform.
Instead, define CMAKE_HOST_EXECUTABLE_SUFFIX as appropriate, and use that suffix instead.

This helps to address issue #5115.

* Add support for Wasm as a platform

This helps to address issue #5115.

* Add emscripten build

This closes #5115.

1 files changed, 5 insertions, 5 deletions

diff --git a/source/slang/slang-workspace-version.cpp b/source/slang/slang-workspace-version.cpp
index d85724328..f3ae6271a 100644
--- a/source/slang/slang-workspace-version.cpp
+++ b/source/slang/slang-workspace-version.cpp
@@ -457,7 +457,7 @@ ArrayView<Index> DocumentVersion::getUTF8Boundaries(Index line)
 }
 
 void DocumentVersion::oneBasedUTF8LocToZeroBasedUTF16Loc(
-    Index inLine, Index inCol, Index& outLine, Index& outCol)
+    Index inLine, Index inCol, int64_t& outLine, int64_t& outCol)
 {
     if (inLine <= 0)
     {
@@ -472,12 +472,12 @@ void DocumentVersion::oneBasedUTF8LocToZeroBasedUTF16Loc(
 }
 
 void DocumentVersion::oneBasedUTF8LocToZeroBasedUTF16Loc(
-    Index inLine, Index inCol, int& outLine, int& outCol)
+    Index inLine, Index inCol, int32_t& outLine, int32_t& outCol)
 {
-    Index ioutLine, ioutCol;
+    int64_t ioutLine, ioutCol;
     oneBasedUTF8LocToZeroBasedUTF16Loc(inLine, inCol, ioutLine, ioutCol);
-    outLine = (int)ioutLine;
-    outCol = (int)ioutCol;
+    outLine = (int32_t)ioutLine;
+    outCol = (int32_t)ioutCol;
 }
 
 void DocumentVersion::zeroBasedUTF16LocToOneBasedUTF8Loc(