5 files changed, 6 insertions, 16 deletions
diff --git a/src/include/c.h b/src/include/c.h
index dc1841346cd..3297d89ff0e 100644
--- a/src/include/c.h
+++ b/src/include/c.h
@@ -71,6 +71,9 @@
 #include <fcntl.h>				/* ensure O_BINARY is available */
 #endif
 #include <locale.h>
+#ifdef HAVE_XLOCALE_H
+#include <xlocale.h>
+#endif
 #ifdef ENABLE_NLS
 #include <libintl.h>
 #endif
diff --git a/src/include/pg_config.h.in b/src/include/pg_config.h.in
index 38006367a40..6c04347d4e7 100644
--- a/src/include/pg_config.h.in
+++ b/src/include/pg_config.h.in
@@ -499,6 +499,9 @@
 /* Define to 1 if the assembler supports X86_64's POPCNTQ instruction. */
 #undef HAVE_X86_64_POPCNTQ
 
+/* Define to 1 if you have the <xlocale.h> header file. */
+#undef HAVE_XLOCALE_H
+
 /* Define to 1 if you have XSAVE intrinsics. */
 #undef HAVE_XSAVE_INTRINSICS
 
@@ -559,9 +562,6 @@
 /* Define to the appropriate printf length modifier for 64-bit ints. */
 #undef INT64_MODIFIER
 
-/* Define to 1 if `locale_t' requires <xlocale.h>. */
-#undef LOCALE_T_IN_XLOCALE
-
 /* Define as the maximum alignment requirement of any C data type. */
 #undef MAXIMUM_ALIGNOF
 
@@ -748,9 +748,6 @@
 /* Define to 1 to build with ZSTD support. (--with-zstd) */
 #undef USE_ZSTD
 
-/* Define to 1 if `wcstombs_l' requires <xlocale.h>. */
-#undef WCSTOMBS_L_IN_XLOCALE
-
 /* Define WORDS_BIGENDIAN to 1 if your processor stores words with the most
    significant byte first (like Motorola and SPARC, unlike Intel). */
 #if defined AC_APPLE_UNIVERSAL_BUILD
diff --git a/src/include/utils/pg_locale.h b/src/include/utils/pg_locale.h
index 3b443df8014..37ecf951937 100644
--- a/src/include/utils/pg_locale.h
+++ b/src/include/utils/pg_locale.h
@@ -12,9 +12,6 @@
 #ifndef _PG_LOCALE_
 #define _PG_LOCALE_
 
-#if defined(LOCALE_T_IN_XLOCALE) || defined(WCSTOMBS_L_IN_XLOCALE)
-#include <xlocale.h>
-#endif
 #ifdef USE_ICU
 #include <unicode/ucol.h>
 #endif
diff --git a/src/interfaces/ecpg/ecpglib/ecpglib_extern.h b/src/interfaces/ecpg/ecpglib/ecpglib_extern.h
index 01b4309a710..bad3cd9920b 100644
--- a/src/interfaces/ecpg/ecpglib/ecpglib_extern.h
+++ b/src/interfaces/ecpg/ecpglib/ecpglib_extern.h
@@ -13,9 +13,6 @@
 #ifndef CHAR_BIT
 #include <limits.h>
 #endif
-#ifdef LOCALE_T_IN_XLOCALE
-#include <xlocale.h>
-#endif
 
 enum COMPAT_MODE
 {
diff --git a/src/port/chklocale.c b/src/port/chklocale.c
index 9506cd87ed8..afdbd9c875b 100644
--- a/src/port/chklocale.c
+++ b/src/port/chklocale.c
@@ -23,10 +23,6 @@
 #include <langinfo.h>
 #endif
 
-#ifdef LOCALE_T_IN_XLOCALE
-#include <xlocale.h>
-#endif
-
 #include "mb/pg_wchar.h"