3 files changed, 2 insertions, 16 deletions
diff --git a/src/include/c.h b/src/include/c.h
index bbc53f5caa8..652f67bd936 100644
--- a/src/include/c.h
+++ b/src/include/c.h
@@ -328,7 +328,7 @@
  * bool
  *		Boolean value, either true or false.
  *
- * Use stdbool.h if available and its bool has size 1.  That's useful for
+ * We use stdbool.h if bool has size 1 after including it.  That's useful for
  * better compiler and debugger output and for compatibility with third-party
  * libraries.  But PostgreSQL currently cannot deal with bool of other sizes;
  * there are static assertions around the code to prevent that.
@@ -339,7 +339,7 @@
 
 #ifndef __cplusplus
 
-#if defined(HAVE_STDBOOL_H) && SIZEOF_BOOL == 1
+#if SIZEOF_BOOL == 1
 #include <stdbool.h>
 #define USE_STDBOOL 1
 #else
diff --git a/src/include/pg_config.h.in b/src/include/pg_config.h.in
index c876033f9da..d5ab0079b1d 100644
--- a/src/include/pg_config.h.in
+++ b/src/include/pg_config.h.in
@@ -519,9 +519,6 @@
 /* Define to 1 if you have the `SSL_get_current_compression' function. */
 #undef HAVE_SSL_GET_CURRENT_COMPRESSION
 
-/* Define to 1 if stdbool.h conforms to C99. */
-#undef HAVE_STDBOOL_H
-
 /* Define to 1 if you have the <stdint.h> header file. */
 #undef HAVE_STDINT_H
 
@@ -742,9 +739,6 @@
 /* Define to 1 if the assembler supports X86_64's POPCNTQ instruction. */
 #undef HAVE_X86_64_POPCNTQ
 
-/* Define to 1 if the system has the type `_Bool'. */
-#undef HAVE__BOOL
-
 /* Define to 1 if your compiler understands __builtin_bswap16. */
 #undef HAVE__BUILTIN_BSWAP16
 
diff --git a/src/include/pg_config.h.win32 b/src/include/pg_config.h.win32
index d9bf16afd60..388331d9914 100644
--- a/src/include/pg_config.h.win32
+++ b/src/include/pg_config.h.win32
@@ -395,11 +395,6 @@
 /* Define to 1 if you have the `SSL_get_current_compression' function. */
 #define HAVE_SSL_GET_CURRENT_COMPRESSION 1
 
-/* Define to 1 if stdbool.h conforms to C99. */
-#if (_MSC_VER >= 1800)
-#define HAVE_STDBOOL_H 1
-#endif
-
 /* Define to 1 if you have the <stdint.h> header file. */
 /* #undef HAVE_STDINT_H */
 
@@ -581,9 +576,6 @@
 /* Define to 1 if the assembler supports X86_64's POPCNTQ instruction. */
 /* #undef HAVE_X86_64_POPCNTQ */
 
-/* Define to 1 if the system has the type `_Bool'. */
-/* #undef HAVE__BOOL */
-
 /* Define to 1 if your compiler understands __builtin_bswap16. */
 /* #undef HAVE__BUILTIN_BSWAP16 */