Merge branch 'stl-fixes'

Minor fixes to STL build.

See https://github.com/wxWidgets/wxWidgets/pull/2289

.github/workflows/ci.yml

@@ -123,7 +123,7 @@ jobs:
           case "${{ matrix.compiler }}" in
             clang)
               echo CC=clang >> $GITHUB_ENV
-              echo CXX=clang++ >> $GITHUB_ENV
+              echo CXX='clang++ -stdlib=libc++' >> $GITHUB_ENV
               echo LD=clang++ >> $GITHUB_ENV
 
               allow_warn_opt="-Wno-error=#warnings"

build/cmake/setup.cmake

@@ -132,21 +132,6 @@ if(NOT MSVC)
     endif()
 endif()
 
-if(wxUSE_STL AND CMAKE_CXX_STANDARD EQUAL 98)
-    wx_check_cxx_source_compiles("
-        std::vector<int> moo;
-        std::list<int> foo;
-        std::vector<int>::iterator it =
-            std::find_if(moo.begin(), moo.end(),
-                std::bind2nd(std::less<int>(), 3));"
-        wxTEST_STL
-        string functional algorithm vector list
-        )
-    if(NOT wxTEST_STL)
-        message(FATAL_ERROR "Can't use wxUSE_STL as basic STL functionality is missing")
-    endif()
-endif()
-
 wx_check_cxx_source_compiles("
     std::string foo, bar;
     foo.compare(bar);

configure

@@ -20706,46 +20706,6 @@ $as_echo "$as_me: WARNING: No std::iostreams, switching to --disable-std_iostrea
 fi
 
 if test "$wxUSE_STL" = "yes"; then
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for basic STL functionality" >&5
-$as_echo_n "checking for basic STL functionality... " >&6; }
-if ${wx_cv_lib_stl+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#include <string>
-            #include <functional>
-            #include <algorithm>
-            #include <vector>
-            #include <list>
-int
-main ()
-{
-std::vector<int> moo;
-             std::list<int> foo;
-             std::vector<int>::iterator it =
-                 std::find_if(moo.begin(), moo.end(),
-                              std::bind2nd(std::less<int>(), 3));
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_cxx_try_compile "$LINENO"; then :
-  wx_cv_lib_stl=yes
-else
-  wx_cv_lib_stl=no
-
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $wx_cv_lib_stl" >&5
-$as_echo "$wx_cv_lib_stl" >&6; }
-
-    if test "$wx_cv_lib_stl" != yes; then
-         as_fn_error $? "Can't use --enable-stl as basic STL functionality is missing" "$LINENO" 5
-    fi
-
         { $as_echo "$as_me:${as_lineno-$LINENO}: checking for compliant std::string::compare" >&5
 $as_echo_n "checking for compliant std::string::compare... " >&6; }
 if ${wx_cv_func_stdstring_compare+:} false; then :

configure.in

@@ -2002,28 +2002,6 @@ if test "$wxUSE_STD_IOSTREAM" = "yes"; then
 fi
 
 if test "$wxUSE_STL" = "yes"; then
-    dnl check for basic STL functionality
-    AC_CACHE_CHECK([for basic STL functionality],
-        wx_cv_lib_stl,
-        [AC_TRY_COMPILE([#include <string>
-            #include <functional>
-            #include <algorithm>
-            #include <vector>
-            #include <list>],
-            [std::vector<int> moo;
-             std::list<int> foo;
-             std::vector<int>::iterator it =
-                 std::find_if(moo.begin(), moo.end(),
-                              std::bind2nd(std::less<int>(), 3));],
-            wx_cv_lib_stl=yes,
-            wx_cv_lib_stl=no
-        )]
-    )
-
-    if test "$wx_cv_lib_stl" != yes; then
-         AC_MSG_ERROR([Can't use --enable-stl as basic STL functionality is missing])
-    fi
-
     dnl check for compliant std::string::compare
     AC_CACHE_CHECK([for compliant std::string::compare],
         wx_cv_func_stdstring_compare,

include/wx/hashmap.h

@@ -507,8 +507,6 @@ public:
     size_t operator()( wxLongLong_t x ) const wxNOEXCEPT { return longlongHash(x); }
     size_t operator()( wxULongLong_t x ) const wxNOEXCEPT { return longlongHash(x); }
 #endif // wxHAS_LONG_LONG_T_DIFFERENT_FROM_LONG
-
-    wxIntegerHash& operator=(const wxIntegerHash&) { return *this; }
 };
 
 #else // wxNEEDS_WX_HASH_MAP