Squash warnings (#2515)

* Don't use uname -p

It's not portable (doesn't work on my machine)

* Disable maybe-uninitialized warning on gcc

Only false positives at the moment

* Squash warning in miniz

Allow it to use 64 bit file handing functions with gcc

* Use noreturn c++11 attribute in SLANG_RETURN_NEVER

* Squash uninitialized variable warnings

* Squash const char/char conversion warnings

Co-authored-by: Yong He <yonghe@outlook.com>

6 files changed, 11 insertions, 7 deletions

diff --git a/github_test.sh b/github_test.sh
index b18566f84..dc07c6250 100644
--- a/github_test.sh
+++ b/github_test.sh
@@ -9,7 +9,7 @@ else
 fi
 
 PLATFORM=$(uname -s | tr '[:upper:]' '[:lower:]')
-ARCHITECTURE=$(uname -p)
+ARCHITECTURE=$(uname -m)
 
 # Darwin is actually macosx (for paths etc)
 if [ "${PLATFORM}" == "darwin" ]; then
diff --git a/premake5.lua b/premake5.lua
index f5a86126e..92243263a 100644
--- a/premake5.lua
+++ b/premake5.lua
@@ -339,8 +339,9 @@ newoption {
      filter { "toolset:clang or gcc*", "language:C++" }
          buildoptions { "-Wno-reorder", "-Wno-class-memaccess"}
 
-     filter { "toolset:gcc*"}
-         buildoptions { "-Wno-implicit-fallthrough"  }
+     filter { "toolset:gcc*" }
+         buildoptions { "-Wno-implicit-fallthrough", "-Wno-maybe-uninitialized" }
+
 
      filter { "toolset:clang" }
           buildoptions { "-Wno-deprecated-register", "-Wno-tautological-compare", "-Wno-missing-braces", "-Wno-undefined-var-template", "-Wno-unused-function", "-Wno-return-std-move", "-Wno-ignored-optimization-argument", "-Wno-unknown-warning-option" }
@@ -1501,6 +1502,8 @@ tool "slangd"
          "external/miniz/miniz_tinfl.c",
          "external/miniz/miniz_zip.c"
      }
+     filter { "system:linux" }
+         defines { "_LARGEFILE64_SOURCE" }
  
      filter { "system:linux or macosx" }
          links { "dl"}
diff --git a/slang.h b/slang.h
index 6589de67d..2027aeab3 100644
--- a/slang.h
+++ b/slang.h
@@ -380,7 +380,7 @@ convention for interface methods.
 #endif // __cplusplus
 
 #ifndef SLANG_RETURN_NEVER
-#   define SLANG_RETURN_NEVER /* empty */
+#   define SLANG_RETURN_NEVER [[noreturn]]
 #endif // SLANG_RETURN_NEVER
 
 /* Macros for detecting processor */
diff --git a/source/slang/slang-ir-diff-jvp.cpp b/source/slang/slang-ir-diff-jvp.cpp
index 7f5979a87..1597c80d1 100644
--- a/source/slang/slang-ir-diff-jvp.cpp
+++ b/source/slang/slang-ir-diff-jvp.cpp
@@ -2515,6 +2515,7 @@ struct BackwardDiffTranscriber
             newInst = builder->emitDiv(resultType, primalLeft, primalRight);
             break;
         default:
+            newInst = nullptr;
             getSink()->diagnose(origArith->sourceLoc,
                 Diagnostics::unimplemented,
                 "this arithmetic instruction cannot be differentiated");
diff --git a/source/slang/slang-legalize-types.h b/source/slang/slang-legalize-types.h
index 600f1d7a7..a24caf960 100644
--- a/source/slang/slang-legalize-types.h
+++ b/source/slang/slang-legalize-types.h
@@ -73,7 +73,7 @@ struct LegalType
 
     Flavor              flavor = Flavor::none;
     RefPtr<RefObject>   obj;
-    IRType*             irType;
+    IRType*             irType = nullptr;
 
     static LegalType simple(IRType* type)
     {
diff --git a/tools/gfx-unit-test/shader-cache-tests.cpp b/tools/gfx-unit-test/shader-cache-tests.cpp
index a9939d434..a7306599a 100644
--- a/tools/gfx-unit-test/shader-cache-tests.cpp
+++ b/tools/gfx-unit-test/shader-cache-tests.cpp
@@ -271,7 +271,7 @@ namespace gfx_test
         {
             ComPtr<IShaderProgram> shaderProgram;
             slang::ProgramLayout* slangReflection;
-            char* shaderFilename;
+            const char* shaderFilename;
             switch (shaderIndex)
             {
             case 0:
@@ -361,7 +361,7 @@ namespace gfx_test
         {
             ComPtr<IShaderProgram> shaderProgram;
             slang::ProgramLayout* slangReflection;
-            char* entryPointName;
+            const char* entryPointName;
             switch (shaderIndex)
             {
             case 0: