[libxslt] fix export statements for clang-cl (#26003)

* fix libxslt export statement to include extern for clang-cl

* v db

ports/libxslt/extern_export.patch

@@ -0,0 +1,30 @@
+diff --git a/libexslt/exsltexports.h b/libexslt/exsltexports.h
+index 381567e0a..5088e0ec4 100644
+--- a/libexslt/exsltexports.h
++++ b/libexslt/exsltexports.h
+@@ -48,8 +48,8 @@
+   #undef EXSLTPUBVAR
+   #undef EXSLTCALL
+   #if defined(IN_LIBEXSLT) && !defined(LIBEXSLT_STATIC)
+-    #define EXSLTPUBFUN __declspec(dllexport)
+-    #define EXSLTPUBVAR __declspec(dllexport)
++    #define EXSLTPUBFUN extern __declspec(dllexport)
++    #define EXSLTPUBVAR extern __declspec(dllexport)
+   #else
+     #define EXSLTPUBFUN
+     #if !defined(LIBEXSLT_STATIC)
+diff --git a/libxslt/xsltexports.h b/libxslt/xsltexports.h
+index 99b6ac387..bbc556fb6 100644
+--- a/libxslt/xsltexports.h
++++ b/libxslt/xsltexports.h
+@@ -50,8 +50,8 @@
+   #undef XSLTPUBVAR
+   #undef XSLTCALL
+   #if defined(IN_LIBXSLT) && !defined(LIBXSLT_STATIC)
+-    #define XSLTPUBFUN __declspec(dllexport)
+-    #define XSLTPUBVAR __declspec(dllexport)
++    #define XSLTPUBFUN extern __declspec(dllexport)
++    #define XSLTPUBVAR extern __declspec(dllexport)
+   #else
+     #define XSLTPUBFUN
+     #if !defined(LIBXSLT_STATIC)

ports/libxslt/portfile.cmake

@@ -10,6 +10,7 @@ vcpkg_from_github(
         libexslt-pkgconfig.patch
         fix-gcrypt-deps.patch
         skip-install-docs.patch
+        extern_export.patch
 )
 
 vcpkg_check_features(OUT_FEATURE_OPTIONS FEATURE_OPTIONS

ports/libxslt/vcpkg.json

@@ -1,7 +1,7 @@
 {
   "name": "libxslt",
   "version": "1.1.35",
-  "port-version": 1,
+  "port-version": 2,
   "description": "Libxslt is a XSLT library implemented in C for XSLT 1.0 and most of EXSLT",
   "homepage": "https://github.com/GNOME/libxslt",
   "license": null,

versions/baseline.json

@@ -4278,7 +4278,7 @@
     },
     "libxslt": {
       "baseline": "1.1.35",
-      "port-version": 1
+      "port-version": 2
     },
     "libyaml": {
       "baseline": "0.2.5",

versions/l-/libxslt.json

@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "fb07abefc8894accd9967f41c8db983dcc031189",
+      "version": "1.1.35",
+      "port-version": 2
+    },
     {
       "git-tree": "3febc2931430356214f9a15ec06f7863ad4825d9",
       "version": "1.1.35",