[libxml2] Fix compilation on iOS (#42695)

ports/libxml2/fix_ios_compilation.patch

@@ -0,0 +1,87 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 0a279c8..8e771ee 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -136,7 +136,7 @@ if (NOT MSVC)
+     check_include_files(fcntl.h HAVE_FCNTL_H)
+     check_function_exists(fpclass HAVE_FPCLASS)
+     check_function_exists(ftime HAVE_FTIME)
+-    check_function_exists(getentropy HAVE_GETENTROPY)
++    check_symbol_exists(getentropy "sys/random.h" HAVE_GETENTROPY)
+     check_function_exists(gettimeofday HAVE_GETTIMEOFDAY)
+     check_library_exists(history append_history "" HAVE_LIBHISTORY)
+     check_library_exists(readline readline "" HAVE_LIBREADLINE)
+@@ -149,7 +149,6 @@ if (NOT MSVC)
+     check_function_exists(stat HAVE_STAT)
+     check_include_files(stdint.h HAVE_STDINT_H)
+     check_include_files(sys/mman.h HAVE_SYS_MMAN_H)
+-    check_include_files(sys/random.h HAVE_SYS_RANDOM_H)
+     check_include_files(sys/select.h HAVE_SYS_SELECT_H)
+     check_include_files(sys/socket.h HAVE_SYS_SOCKET_H)
+     check_include_files(sys/stat.h HAVE_SYS_STAT_H)
+diff --git a/config.h.cmake.in b/config.h.cmake.in
+index 2f4aeba..79f1cdb 100644
+--- a/config.h.cmake.in
++++ b/config.h.cmake.in
+@@ -69,9 +69,6 @@
+ /* Define to 1 if you have the <sys/mman.h> header file. */
+ #cmakedefine HAVE_SYS_MMAN_H 1
+ 
+-/* Define to 1 if you have the <sys/random.h> header file. */
+-#cmakedefine HAVE_SYS_RANDOM_H 1
+-
+ /* Define to 1 if you have the <sys/select.h> header file. */
+ #cmakedefine HAVE_SYS_SELECT_H 1
+ 
+diff --git a/configure.ac b/configure.ac
+index 48cd2f0..0f09c61 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -304,7 +304,6 @@ AC_CHECK_HEADERS([stdint.h])
+ AC_CHECK_HEADERS([fcntl.h unistd.h sys/stat.h])
+ AC_CHECK_HEADERS([sys/mman.h])
+ AC_CHECK_HEADERS([sys/time.h sys/timeb.h])
+-AC_CHECK_HEADERS([sys/random.h])
+ AC_CHECK_HEADERS([dl.h dlfcn.h])
+ AC_CHECK_HEADERS([glob.h])
+ AM_CONDITIONAL(WITH_GLOB, test "$ac_cv_header_glob_h" = "yes")
+@@ -317,9 +316,7 @@ AH_VERBATIM([HAVE_MUNMAP_AFTER],[/* mmap() is no good without munmap() */
+ #  undef /**/ HAVE_MMAP
+ #endif])
+ 
+-AC_CHECK_DECL([getentropy],
+-              [AC_DEFINE([HAVE_GETENTROPY], [1], [getentropy])], [],
+-              [#include <sys/random.h>])
++AC_CHECK_DECLS([getentropy], [], [], [#include <sys/random.h>])
+ 
+ dnl
+ dnl Checks for inet libraries
+diff --git a/dict.c b/dict.c
+index 49e1c6b..46bb4d4 100644
+--- a/dict.c
++++ b/dict.c
+@@ -928,13 +928,11 @@ xmlDictQLookup(xmlDictPtr dict, const xmlChar *prefix, const xmlChar *name) {
+   #define WIN32_LEAN_AND_MEAN
+   #include <windows.h>
+   #include <bcrypt.h>
+-#elif defined(HAVE_GETENTROPY)
++#elif HAVE_GETENTROPY
+   #ifdef HAVE_UNISTD_H
+     #include <unistd.h>
+   #endif
+-  #ifdef HAVE_SYS_RANDOM_H
+-    #include <sys/random.h>
+-  #endif
++  #include <sys/random.h>
+ #else
+   #include <time.h>
+ #endif
+@@ -965,7 +963,7 @@ xmlInitRandom(void) {
+                     "error code %lu\n", GetLastError());
+             abort();
+         }
+-#elif defined(HAVE_GETENTROPY)
++#elif HAVE_GETENTROPY
+         while (1) {
+             if (getentropy(globalRngState, sizeof(globalRngState)) == 0)
+                 break;

ports/libxml2/portfile.cmake

@@ -19,6 +19,7 @@ vcpkg_from_github(
     PATCHES
         disable-docs.patch
         fix_cmakelist.patch
+        fix_ios_compilation.patch
         ${FIX_COMPATIBILITY_PATCH}
         ${ADD_MISSING_BCRYPT_PATCH}
 )

ports/libxml2/vcpkg.json

@@ -1,6 +1,7 @@
 {
   "name": "libxml2",
   "version": "2.13.5",
+  "port-version": 1,
   "description": "Libxml2 is the XML C parser and toolkit developed for the Gnome project (but usable outside of the Gnome platform).",
   "homepage": "https://gitlab.gnome.org/GNOME/libxml2/-/wikis/home",
   "license": "MIT",

versions/baseline.json

@@ -5438,7 +5438,7 @@
     },
     "libxml2": {
       "baseline": "2.13.5",
-      "port-version": 0
+      "port-version": 1
     },
     "libxmlmm": {
       "baseline": "0.6.0",

versions/l-/libxml2.json

@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "42ed1437607b934471807d0a2830d23d43f22bb1",
+      "version": "2.13.5",
+      "port-version": 1
+    },
     {
       "git-tree": "f61ea0a7f998b892dc7eb51f6366867bef1d5353",
       "version": "2.13.5",