build: Remove compiler TLS warning

configure.ac

@@ -411,7 +411,7 @@ if test "$with_tls" = "yes"; then
     AC_COMPILE_IFELSE([
         AC_LANG_SOURCE([__declspec(thread) int v;]) ], [
         AC_DEFINE([XML_THREAD_LOCAL], [__declspec(thread)], [TLS specifier]) ], [
-    WARN_NO_TLS=1 ])])])
+    ])])])
 fi
 
 dnl Checking whether __attribute__((destructor)) is accepted by the compiler
@@ -1137,11 +1137,3 @@ AC_CONFIG_FILES([Makefile include/Makefile include/libxml/Makefile include/priva
 AC_CONFIG_FILES([python/setup.py], [chmod +x python/setup.py])
 AC_CONFIG_FILES([xml2-config], [chmod +x xml2-config])
 AC_OUTPUT
-
-if test "$WARN_NO_TLS" != ""; then
-    echo "================================================================"
-    echo "WARNING: Your C compiler appears to not support thread-local"
-    echo "storage. Future versions of libxml2 will require this feature"
-    echo "for multi-threading."
-    echo "================================================================"
-fi

meson.build

@@ -331,7 +331,6 @@ if sys_windows == false
 endif
 
 ### thread local storage
-support_tls = true
 if want_tls == true
     tls_src = '''
 #include <threads.h>
@@ -368,7 +367,6 @@ int main()
                 config_h.set('XML_THREAD_LOCAL', '__declspec(thread)')
             else
                 want_tls = false
-                support_tls = false
             endif
         endif
     endif
@@ -776,15 +774,6 @@ configure_file(
     install_dir: dir_lib / 'cmake' / 'libxml2',
 )
 
-if support_tls == false
-    message('===============================================================')
-    message('WARNING: Your C compiler appears to not support thread-local')
-    message('storage. Future versions of libxml2 will require this feature')
-    message('for multi-threading.')
-    message('===============================================================\n',
-    )
-endif
-
 # summary
 
 summary(