Remove configure check for OpenSSL's SSL_get_current_compression()

This function has been added in OpenSSL 0.9.8, which is the oldest
version supported on HEAD, so checking for it at configure time is
useless.  Both the frontend and backend code did not even bother to use
it.

Reported-by: Daniel Gustafsson
Author: Michael Paquier
Reviewed-by: Daniel Gustafsson, Tom Lane
Discussion: https://postgr.es/m/[email protected]
Discussion: https://postgr.es/m/[email protected]

5 files changed, 2 insertions, 12 deletions

diff --git a/configure b/configure
index 1d88983b34..56c4aaa95b 100755
--- a/configure
+++ b/configure
@@ -12094,7 +12094,7 @@ else
 fi
 
   fi
-  for ac_func in SSL_clear_options SSL_get_current_compression X509_get_signature_nid
+  for ac_func in SSL_clear_options X509_get_signature_nid
 do :
   as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
 ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
diff --git a/configure.in b/configure.in
index a2cb20b5e3..9fd9c390e6 100644
--- a/configure.in
+++ b/configure.in
@@ -1186,7 +1186,7 @@ if test "$with_openssl" = yes ; then
      AC_SEARCH_LIBS(CRYPTO_new_ex_data, [eay32 crypto], [], [AC_MSG_ERROR([library 'eay32' or 'crypto' is required for OpenSSL])])
      AC_SEARCH_LIBS(SSL_new, [ssleay32 ssl], [], [AC_MSG_ERROR([library 'ssleay32' or 'ssl' is required for OpenSSL])])
   fi
-  AC_CHECK_FUNCS([SSL_clear_options SSL_get_current_compression X509_get_signature_nid])
+  AC_CHECK_FUNCS([SSL_clear_options X509_get_signature_nid])
   # Functions introduced in OpenSSL 1.1.0. We used to check for
   # OPENSSL_VERSION_NUMBER, but that didn't work with 1.1.0, because LibreSSL
   # defines OPENSSL_VERSION_NUMBER to claim version 2.0.0, even though it
diff --git a/src/include/pg_config.h.in b/src/include/pg_config.h.in
index c208dcdfc7..0d77f2aafd 100644
--- a/src/include/pg_config.h.in
+++ b/src/include/pg_config.h.in
@@ -515,9 +515,6 @@
 /* Define to 1 if you have the `SSL_clear_options' function. */
 #undef HAVE_SSL_CLEAR_OPTIONS
 
-/* 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
 
diff --git a/src/include/pg_config.h.win32 b/src/include/pg_config.h.win32
index 6c98ef4916..467fb89ee6 100644
--- a/src/include/pg_config.h.win32
+++ b/src/include/pg_config.h.win32
@@ -373,9 +373,6 @@
 /* Define to 1 if you have the `SSL_clear_options' function. */
 #define HAVE_SSL_CLEAR_OPTIONS 1
 
-/* 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. */
 #define HAVE_STDBOOL_H 1
 
diff --git a/src/include/port.h b/src/include/port.h
index 10dcb5f0a6..bfd2e2759f 100644
--- a/src/include/port.h
+++ b/src/include/port.h
@@ -446,10 +446,6 @@ extern void unsetenv(const char *name);
 extern void srandom(unsigned int seed);
 #endif
 
-#ifndef HAVE_SSL_GET_CURRENT_COMPRESSION
-#define SSL_get_current_compression(x) 0
-#endif
-
 #ifndef HAVE_DLOPEN
 extern void *dlopen(const char *file, int mode);
 extern void *dlsym(void *handle, const char *symbol);