[cpprestsdk] fix clang build on new zlib

definint dllimport is *bad* and breaks clang, and since this is in maintaince mode they aren't going to fix it.  Refs:

microsoft/cpprestsdk#1710
llvm/llvm-project#53269

Author: russelltg

ports/cpprestsdk/fix-clang-dllimport.patch

@@ -0,0 +1,52 @@
+diff --git a/Release/include/cpprest/details/cpprest_compat.h b/Release/include/cpprest/details/cpprest_compat.h
+index bf107479..00581371 100644
+--- a/Release/include/cpprest/details/cpprest_compat.h
++++ b/Release/include/cpprest/details/cpprest_compat.h
+@@ -29,7 +29,6 @@
+ #else // ^^^ _WIN32 ^^^ // vvv !_WIN32 vvv
+ 
+ #define __declspec(x) __attribute__((x))
+-#define dllimport
+ #define novtable /* no novtable equivalent */
+ #define __assume(x)                                                                                                    \
+     do                                                                                                                 \
+@@ -74,9 +73,17 @@
+ #define _ASYNCRTIMP_TYPEINFO
+ #else // ^^^ _NO_ASYNCRTIMP ^^^ // vvv !_NO_ASYNCRTIMP vvv
+ #ifdef _ASYNCRT_EXPORT
++#ifdef _WIN32
+ #define _ASYNCRTIMP __declspec(dllexport)
++#else
++#define _ASYNCRTIMP __attribute__((visibility("default")))
++#endif
+ #else // ^^^ _ASYNCRT_EXPORT ^^^ // vvv !_ASYNCRT_EXPORT vvv
++#ifdef _WIN32
+ #define _ASYNCRTIMP __declspec(dllimport)
++#else
++#define _ASYNCRTIMP
++#endif
+ #endif // _ASYNCRT_EXPORT
+ 
+ #if defined(_WIN32)
+diff --git a/Release/include/pplx/pplx.h b/Release/include/pplx/pplx.h
+index d9ba9c61..8d36252c 100644
+--- a/Release/include/pplx/pplx.h
++++ b/Release/include/pplx/pplx.h
+@@ -30,9 +30,17 @@
+ #define _PPLXIMP
+ #else
+ #ifdef _PPLX_EXPORT
++#ifdef _WIN32
+ #define _PPLXIMP __declspec(dllexport)
+ #else
++#define _PPLXIMP __attribute__((visibility("default")))
++#endif
++#else
++#ifdef _WIN32
+ #define _PPLXIMP __declspec(dllimport)
++#else
++#define _PPLXIMP
++#endif
+ #endif
+ #endif
+ 

ports/cpprestsdk/portfile.cmake

@@ -8,6 +8,7 @@ vcpkg_from_github(
         fix-find-openssl.patch
         fix_narrowing.patch
         fix-uwp.patch
+        fix-clang-dllimport.patch # workaround for https://github.com/microsoft/cpprestsdk/issues/1710
 )
 
 set(OPTIONS)

ports/cpprestsdk/vcpkg.json

@@ -1,6 +1,7 @@
 {
   "name": "cpprestsdk",
   "version": "2.10.19",
+  "port-version": 1,
   "description": [
     "C++11 JSON, REST, and OAuth library",
     "The C++ REST SDK is a Microsoft project for cloud-based client-server communication in native code using a modern asynchronous C++ API design. This project aims to help C++ developers connect to and interact with services."