More GNUC Fixes (#22687)

* Replace __sync_swap with __atomic_exchange_n

__sync_swap() is a clang specific function.

* Remove multiline comment

* Add paranthesis around sum

src/md/hotdata/../inc/streamutil.h:73:34: warning: suggest parentheses around ‘+’ in operand of ‘&’ [-Wparentheses]
     UINT32 aligned = *totalBytes + 3 & ~3;

* Define __int64

* Define windows types for tests

* Remove undefined has_builtin defines and define alloca and inline for GNUC

* Remove __clang__ where possible

* Add implicit casting to help compiler find WCHAR* variant

src/binder/assembly.cpp:294:73: error: no matching function for call to ‘SString::SString(SString)’
         return (pAsmName == nullptr ? nullptr : pAsmName->GetSimpleName());
                                                                         ^
In file included from src/inc/sstring.h:1082:0,
                 from src/inc/ex.h:19,
                 from src/inc/stgpool.h:28,
                 from src/inc/../md/inc/metamodel.h:18,
                 from src/inc/../md/inc/metamodelro.h:19,
                 from src/inc/metadata.h:17,
                 from src/binder/../vm/util.hpp:19,
                 from src/binder/../vm/common.h:110,
                 from src/binder/assembly.cpp:14:
src/inc/sstring.inl:73:8: note: candidate: SString::SString(void*, COUNT_T)
 inline SString::SString(void *buffer, COUNT_T size)
        ^
src/inc/sstring.inl:73:8: note:   candidate expects 2 arguments, 1 provided
src/inc/sstring.inl:436:8: note: candidate: SString::SString(SString::tagLiteral, const WCHAR*, COUNT_T)
 inline SString::SString(tagLiteral dummytag, const WCHAR *literal, COUNT_T count)
        ^
src/inc/sstring.inl:436:8: note:   candidate expects 3 arguments, 1 provided
src/inc/sstring.inl:418:8: note: candidate: SString::SString(SString::tagLiteral, const WCHAR*)
 inline SString::SString(tagLiteral dummytag, const WCHAR *literal)
        ^
src/inc/sstring.inl:418:8: note:   candidate expects 2 arguments, 1 provided
src/inc/sstring.inl:401:8: note: candidate: SString::SString(SString::tagUTF8Literal, const UTF8*)
 inline SString::SString(tagUTF8Literal dummytag, const UTF8 *literal)
        ^
src/inc/sstring.inl:401:8: note:   candidate expects 2 arguments, 1 provided
src/inc/sstring.inl:382:8: note: candidate: SString::SString(SString::tagLiteral, const CHAR*)
 inline SString::SString(tagLiteral dummytag, const ASCII *literal)

* Reorder DLLEXPORT and STDAPI

GNUC wants extern "C" <attribute> format.

* Abstract __FUNCSIG__

* Abstract __debugbreak()

* Move common compiler options out of clang and add Wno-unused-value

* Add paranthesis around || and &&

src/gc/gc.cpp:9084:38: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses]
                     (!chosen_power2) && (i < free_space_count));

* Set Wno-delete-non-virtual-dtor for CXX files only

* Don't warn on unterminated endif labels

* Suppress unused functions

* Use 0x syntax rather than h syntax on GNU asm files

* Correct constructor call directly

src/ToolBox/superpmi/superpmi-shared/logging.cpp:301:27:   required from here
src/inc/clr_std/string:58:9: error: cannot call constructor ‘std::basic_string<char>::basic_string’ directly
         this->basic_string::basic_string(_Ptr, c_len(_Ptr));

* Suppress NULL used in arithmetic warnings

1 files changed, 3 insertions, 3 deletions

diff --git a/src/unwinder/arm64/unwinder_arm64.cpp b/src/unwinder/arm64/unwinder_arm64.cpp
index 4c63815ccd..873ddf1f53 100644
--- a/src/unwinder/arm64/unwinder_arm64.cpp
+++ b/src/unwinder/arm64/unwinder_arm64.cpp
@@ -235,7 +235,7 @@ Return Value:
         SourceAddress = StartingSp + FIELD_OFFSET(ARM64_KTRAP_FRAME, X);
         for (RegIndex = 0; RegIndex < 18; RegIndex++) {
             UPDATE_CONTEXT_POINTERS(UnwindParams, RegIndex, SourceAddress);
-#ifdef __clang__
+#ifdef __GNUC__
             *(&ContextRecord->X0 + RegIndex) = MEMORY_READ_QWORD(UnwindParams, SourceAddress);
 #else
             ContextRecord->X[RegIndex] = MEMORY_READ_QWORD(UnwindParams, SourceAddress);
@@ -315,7 +315,7 @@ Return Value:
         SourceAddress = StartingSp + FIELD_OFFSET(T_CONTEXT, X0);
         for (RegIndex = 0; RegIndex < 29; RegIndex++) {
             UPDATE_CONTEXT_POINTERS(UnwindParams, RegIndex, SourceAddress);
-#ifdef __clang__
+#ifdef __GNUC__
             *(&ContextRecord->X0 + RegIndex) = MEMORY_READ_QWORD(UnwindParams, SourceAddress);
 #else
             ContextRecord->X[RegIndex] = MEMORY_READ_QWORD(UnwindParams, SourceAddress);
@@ -501,7 +501,7 @@ Return Value:
 
     for (RegIndex = 0; RegIndex < RegisterCount; RegIndex++) {
         UPDATE_CONTEXT_POINTERS(UnwindParams, FirstRegister + RegIndex, CurAddress);
-#ifdef __clang__
+#ifdef __GNUC__
         *(&ContextRecord->X0 + FirstRegister + RegIndex) = MEMORY_READ_QWORD(UnwindParams, CurAddress);
 #else
         ContextRecord->X[FirstRegister + RegIndex] = MEMORY_READ_QWORD(UnwindParams, CurAddress);