[CRT] Refactor CMake files

sdk/lib/crt/stdlib/stdlib.cmake

@@ -0,0 +1,49 @@
+
+list(APPEND LIBCNTPR_STDLIB_SOURCE
+    stdlib/qsort.c
+)
+
+list(APPEND CRT_STDLIB_SOURCE
+    ${LIBCNTPR_STDLIB_SOURCE}
+    stdlib/_exit.c
+    stdlib/_set_abort_behavior.c
+    stdlib/abort.c
+    stdlib/atexit.c
+    stdlib/ecvt.c
+    stdlib/errno.c
+    stdlib/fcvt.c
+    stdlib/fcvtbuf.c
+    stdlib/fullpath.c
+    stdlib/gcvt.c
+    stdlib/getenv.c
+    stdlib/makepath.c
+    stdlib/makepath_s.c
+    stdlib/mbtowc.c
+    stdlib/mbstowcs.c
+    stdlib/obsol.c
+    stdlib/putenv.c
+    stdlib/rot.c
+    stdlib/senv.c
+    stdlib/swab.c
+    stdlib/wfulpath.c
+    stdlib/wputenv.c
+    stdlib/wsenv.c
+    stdlib/wmakpath.c
+    stdlib/wmakpath_s.c
+)
+
+if(USE_CLANG_CL)
+    # clang-cl is missing pragma function support
+    # https://bugs.llvm.org/show_bug.cgi?id=35116
+    set_property(SOURCE stdlib/rot.c APPEND_STRING PROPERTY COMPILE_FLAGS " /fallback")
+
+    if(ARCH STREQUAL "i386")
+        list(APPEND CRT_STDLIB_ASM_SOURCE
+            stdlib/clang-alias.s
+        )
+    elseif(ARCH STREQUAL "amd64")
+        list(APPEND CRT_STDLIB_ASM_SOURCE
+            stdlib/clang-alias.s
+        )
+    endif()
+endif()