From b5703d4357952e577c8b875fa486df22cb0ad64b Mon Sep 17 00:00:00 2001
From: Vadim Zeitlin <vadim@wxwidgets.org>
Date: Tue, 7 Apr 2026 22:59:20 +0200
Subject: [PATCH] Remove check for <widec.h> from configure and HAVE_WIDEC_H

The check for this pre-C99 Solaris header was added back in a49ffb32e2
(include widec.h if it's available, it contains declarations of
[f]putws() under Solaris, 2006-11-09) and shouldn't be needed any more.

CMake never checked for it, so remove the check from configure too and
then remove the now never defined HAVE_WIDEC_H.
---
 build/cmake/setup.h.in |  3 ---
 configure              | 26 ++------------------------
 configure.ac           | 16 ++--------------
 include/wx/chartype.h  |  4 ----
 setup.h.in             |  3 ---
 setup.h_vms            |  3 ---
 6 files changed, 4 insertions(+), 51 deletions(-)

diff --git a/build/cmake/setup.h.in b/build/cmake/setup.h.in
index 6d0853b1f1..fdb947a5b1 100644
--- a/build/cmake/setup.h.in
+++ b/build/cmake/setup.h.in
@@ -1043,9 +1043,6 @@
 /* Define if you have the <unistd.h> header file.  */
 #cmakedefine HAVE_UNISTD_H 1
 
-/* Define if you have <widec.h> (Solaris only) */
-#cmakedefine HAVE_WIDEC_H 1
-
 /* Define if you have the <iconv.h> header file and iconv() symbol.  */
 #cmakedefine HAVE_ICONV 1
 
diff --git a/configure b/configure
index e12afbd03c..728b78e91b 100755
--- a/configure
+++ b/configure
@@ -33213,29 +33213,6 @@ ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 
-wchar_headers="#include <stdio.h>
-#include <wchar.h>"
-case "${host}" in
-    *-*-solaris2* )
-        for ac_header in widec.h
-do :
-  ac_fn_c_check_header_compile "$LINENO" "widec.h" "ac_cv_header_widec_h" "$ac_includes_default
-"
-if test "x$ac_cv_header_widec_h" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_WIDEC_H 1
-_ACEOF
-
-fi
-
-done
-
-        if test "$ac_cv_header_widec_h" = "yes"; then
-            wchar_headers="$wchar_headers
-#include <widec.h>"
-        fi
-esac
-
 
   for wx_func in putws fputws wprintf vswprintf vswscanf
   do
@@ -33249,7 +33226,8 @@ else
 /* end confdefs.h.  */
 
 
-                $wchar_headers
+                #include <stdio.h>
+                #include <wchar.h>
                 $ac_includes_default
 
 int
diff --git a/configure.ac b/configure.ac
index fbde11670d..61d5f4684a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4040,21 +4040,9 @@ if test "$wx_cv_func_vsscanf" = "yes"; then
 fi
 AC_LANG_POP()
 
-dnl also look if we have wide char IO functions, notice that [f]putws are
-dnl declared in special widec.h under Solaris
-wchar_headers="#include <stdio.h>
-#include <wchar.h>"
-case "${host}" in
-    *-*-solaris2* )
-        AC_CHECK_HEADERS(widec.h,,, [AC_INCLUDES_DEFAULT()])
-        if test "$ac_cv_header_widec_h" = "yes"; then
-            wchar_headers="$wchar_headers
-#include <widec.h>"
-        fi
-esac
-
 WX_CHECK_FUNCS(putws fputws wprintf vswprintf vswscanf,,,
-               [$wchar_headers])
+               [#include <stdio.h>
+                #include <wchar.h>])
 
 dnl MinGW has a vswprintf with a different prototype, and
 dnl a _vsnwprintf with the correct prototype, but AC_CHECK_FUNCS
diff --git a/include/wx/chartype.h b/include/wx/chartype.h
index 07e243342c..07684c891a 100644
--- a/include/wx/chartype.h
+++ b/include/wx/chartype.h
@@ -59,10 +59,6 @@
     #endif
 #endif /* Android */
 
-#ifdef HAVE_WIDEC_H
-    #include <widec.h>
-#endif
-
 /* -------------------------------------------------------------------------- */
 /* define wxHAVE_TCHAR_SUPPORT for the compilers which support the TCHAR type */
 /* mapped to either char or wchar_t depending on the ASCII/Unicode mode and   */
diff --git a/setup.h.in b/setup.h.in
index 41bc14e170..d85e9a4bfc 100644
--- a/setup.h.in
+++ b/setup.h.in
@@ -1042,9 +1042,6 @@
 /* Define if you have the <unistd.h> header file.  */
 #undef HAVE_UNISTD_H
 
-/* Define if you have <widec.h> (Solaris only) */
-#undef HAVE_WIDEC_H
-
 /* Define if you have the <iconv.h> header file and iconv() symbol.  */
 #undef HAVE_ICONV
 
diff --git a/setup.h_vms b/setup.h_vms
index 648354f374..73ee0be507 100644
--- a/setup.h_vms
+++ b/setup.h_vms
@@ -1128,9 +1128,6 @@ typedef pid_t GPid;
 #undef HAVE_WCTYPE_H
 #endif
 
-/* Define if you have <widec.h> (Solaris only) */
-#undef HAVE_WIDEC_H
-
 /* Define if you have the <iconv.h> header file and iconv() symbol.  */
 #define HAVE_ICONV_H 1