tweak build script to allow clang builds of mule_main; fix clang build

build.bat

@@ -43,10 +43,10 @@ if "%asan%"=="1"      set auto_compile_flags=%auto_compile_flags% -fsanitize=add
 :: --- Compile/Link Line Definitions ------------------------------------------
 set cl_common=     /I..\src\ /I..\local\ /nologo /FC /Z7
 set clang_common=  -I..\src\ -I..\local\ -gcodeview -fdiagnostics-absolute-paths -Wall -Wno-unknown-warning-option -Wno-missing-braces -Wno-unused-function -Wno-writable-strings -Wno-unused-value -Wno-unused-variable -Wno-unused-local-typedef -Wno-deprecated-register -Wno-deprecated-declarations -Wno-unused-but-set-variable -Wno-single-bit-bitfield-constant-conversion -Xclang -flto-visibility-public-std -D_USE_MATH_DEFINES -Dstrdup=_strdup -Dgnu_printf=printf
-set cl_debug=      call cl /Od %cl_common%
-set cl_release=    call cl /O2 /DNDEBUG %cl_common%
-set clang_debug=   call clang -g -O0 %clang_common%
-set clang_release= call clang -g -O3 -DNDEBUG %clang_common% 
+set cl_debug=      call cl /Od %cl_common% %auto_compile_flags%
+set cl_release=    call cl /O2 /DNDEBUG %cl_common% %auto_compile_flags%
+set clang_debug=   call clang -g -O0 %clang_common% %auto_compile_flags%
+set clang_release= call clang -g -O3 -DNDEBUG %clang_common% %auto_compile_flags%
 set cl_link=       /link /MANIFEST:EMBED /INCREMENTAL:NO /natvis:"%~dp0\src\natvis\base.natvis"
 set clang_link=    -fuse-ld=lld -Xlinker /MANIFEST:EMBED -Xlinker /natvis:"%~dp0\src\natvis\base.natvis"
 set cl_out=        /out:
@@ -56,6 +56,10 @@ set clang_out=     -o
 set gfx=-DOS_FEATURE_GRAPHICAL=1
 set net=-DOS_FEATURE_SOCKET=1
 set link_dll=-DLL
+if "%msvc%"=="1"  set only_compile=/c
+if "%clang%"=="1" set only_compile=-c
+if "%msvc%"=="1"  set EHsc=/EHsc
+if "%clang%"=="1" set EHsc=
 
 :: --- Choose Compile/Link Lines ----------------------------------------------
 if "%msvc%"=="1"      set compile_debug=%cl_debug%
@@ -68,7 +72,6 @@ if "%clang%"=="1"     set compile_link=%clang_link%
 if "%clang%"=="1"     set out=%clang_out%
 if "%debug%"=="1"     set compile=%compile_debug%
 if "%release%"=="1"   set compile=%compile_release%
-set compile=%compile% %auto_compile_flags%
 
 :: --- Prep Directories -------------------------------------------------------
 if not exist build mkdir build
@@ -92,7 +95,7 @@ if "%raddbg_dump%"=="1"        %compile%             ..\src\raddbg_dump\raddbg_d
 if "%ryan_scratch%"=="1"       %compile%             ..\src\scratch\ryan_scratch.c                                %compile_link% %out%ryan_scratch.exe
 if "%cpp_tests%"=="1"          %compile%             ..\src\scratch\i_hate_c_plus_plus.cpp                        %compile_link% %out%cpp_tests.exe
 if "%look_at_raddbg%"=="1"     %compile%             ..\src\scratch\look_at_raddbg.c                              %compile_link% %out%look_at_raddbg.exe
-if "%mule_main%"=="1"          del vc*.pdb mule*.pdb && %cl_release% /MT /c ..\src\mule\mule_inline.cpp && %cl_release% /MT /c ..\src\mule\mule_o2.cpp && %cl_debug% /MT /EHsc ..\src\mule\mule_main.cpp ..\src\mule\mule_c.c mule_inline.obj mule_o2.obj
+if "%mule_main%"=="1"          del vc*.pdb mule*.pdb && %compile_release% %only_compile% ..\src\mule\mule_inline.cpp && %compile_release% %only_compile% ..\src\mule\mule_o2.cpp && %compile_debug% %EHsc% ..\src\mule\mule_main.cpp ..\src\mule\mule_c.c mule_inline.obj mule_o2.obj
 if "%mule_module%"=="1"        %compile%             ..\src\mule\mule_module.cpp                                  %compile_link% %link_dll% %out%mule_module.dll
 if "%mule_hotload%"=="1"       %compile% ..\src\mule\mule_hotload_main.c %compile_link% %out%mule_hotload.exe & %compile% ..\src\mule\mule_hotload_module_main.c %compile_link% %link_dll% %out%mule_hotload_module.dll
 popd

src/mule/mule_inline.cpp

@@ -16,7 +16,7 @@
 ////////////////////////////////
 // NOTE(allen): Inline Stepping
 
-extern unsigned int fixed_frac_bits = 5;
+unsigned int fixed_frac_bits = 5;
 static unsigned int bias = 7;
 
 static FORCE_INLINE unsigned int

src/mule/mule_main.cpp

@@ -1407,7 +1407,7 @@ extended_type_coverage_eval_tests(void){
     Base *base_array[1024] = {0};
     for(int i = 0; i < sizeof(base_array)/sizeof(base_array[0]); i += 1)
     {
-      if(i & 1 == 1)
+      if((i & 1) == 1)
       {
         base_array[i] = new DerivedA();
       }
@@ -1999,7 +1999,7 @@ control_flow_stepping_tests(void){
     if (i <= 1) goto done;
     if ((i&1) == 0) goto even_case;
     
-    odd_case:
+    // odd_case:
     i = 3*i + 1;
     
     even_case: