Remove configure detection of crypt()

crypt() hasn't been needed since crypt detection was removed from
PostgreSQL, so these configure checks are not necessary.

Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/flat/21f88934-f00c-27f6-a9d8-7ea06d317781%402ndquadrant.com

configure

@@ -11209,62 +11209,6 @@ if test "$ac_res" != no; then :
 
 fi
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing crypt" >&5
-$as_echo_n "checking for library containing crypt... " >&6; }
-if ${ac_cv_search_crypt+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  ac_func_search_save_LIBS=$LIBS
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-/* Override any GCC internal prototype to avoid an error.
-   Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-char crypt ();
-int
-main ()
-{
-return crypt ();
-  ;
-  return 0;
-}
-_ACEOF
-for ac_lib in '' crypt; do
-  if test -z "$ac_lib"; then
-    ac_res="none required"
-  else
-    ac_res=-l$ac_lib
-    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
-  fi
-  if ac_fn_c_try_link "$LINENO"; then :
-  ac_cv_search_crypt=$ac_res
-fi
-rm -f core conftest.err conftest.$ac_objext \
-    conftest$ac_exeext
-  if ${ac_cv_search_crypt+:} false; then :
-  break
-fi
-done
-if ${ac_cv_search_crypt+:} false; then :
-
-else
-  ac_cv_search_crypt=no
-fi
-rm conftest.$ac_ext
-LIBS=$ac_func_search_save_LIBS
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_crypt" >&5
-$as_echo "$ac_cv_search_crypt" >&6; }
-ac_res=$ac_cv_search_crypt
-if test "$ac_res" != no; then :
-  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
-
-fi
-
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing shm_open" >&5
 $as_echo_n "checking for library containing shm_open... " >&6; }
 if ${ac_cv_search_shm_open+:} false; then :
@@ -12760,7 +12704,7 @@ $as_echo "#define HAVE_STDBOOL_H 1" >>confdefs.h
 fi
 
 
-for ac_header in atomic.h copyfile.h crypt.h fp_class.h getopt.h ieeefp.h ifaddrs.h langinfo.h mbarrier.h poll.h sys/epoll.h sys/ipc.h sys/prctl.h sys/procctl.h sys/pstat.h sys/resource.h sys/select.h sys/sem.h sys/shm.h sys/sockio.h sys/tas.h sys/un.h termios.h ucred.h utime.h wchar.h wctype.h
+for ac_header in atomic.h copyfile.h fp_class.h getopt.h ieeefp.h ifaddrs.h langinfo.h mbarrier.h poll.h sys/epoll.h sys/ipc.h sys/prctl.h sys/procctl.h sys/pstat.h sys/resource.h sys/select.h sys/sem.h sys/shm.h sys/sockio.h sys/tas.h sys/un.h termios.h ucred.h utime.h wchar.h wctype.h
 do :
   as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
 ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"
@@ -15782,19 +15726,6 @@ done
 
 fi
 
-ac_fn_c_check_func "$LINENO" "crypt" "ac_cv_func_crypt"
-if test "x$ac_cv_func_crypt" = xyes; then :
-  $as_echo "#define HAVE_CRYPT 1" >>confdefs.h
-
-else
-  case " $LIBOBJS " in
-  *" crypt.$ac_objext "* ) ;;
-  *) LIBOBJS="$LIBOBJS crypt.$ac_objext"
- ;;
-esac
-
-fi
-
 ac_fn_c_check_func "$LINENO" "dlopen" "ac_cv_func_dlopen"
 if test "x$ac_cv_func_dlopen" = xyes; then :
   $as_echo "#define HAVE_DLOPEN 1" >>confdefs.h

configure.in

@@ -1118,7 +1118,6 @@ AC_SEARCH_LIBS(dlopen, dl)
 AC_SEARCH_LIBS(socket, [socket ws2_32])
 AC_SEARCH_LIBS(shl_load, dld)
 AC_SEARCH_LIBS(getopt_long, [getopt gnugetopt])
-AC_SEARCH_LIBS(crypt, crypt)
 AC_SEARCH_LIBS(shm_open, rt)
 AC_SEARCH_LIBS(shm_unlink, rt)
 AC_SEARCH_LIBS(clock_gettime, [rt posix4])
@@ -1273,7 +1272,6 @@ AC_HEADER_STDBOOL
 AC_CHECK_HEADERS(m4_normalize([
 	atomic.h
 	copyfile.h
-	crypt.h
 	fp_class.h
 	getopt.h
 	ieeefp.h
@@ -1692,7 +1690,6 @@ else
 fi
 
 AC_REPLACE_FUNCS(m4_normalize([
-	crypt
 	dlopen
 	fls
 	getopt

src/backend/libpq/crypt.c

@@ -14,9 +14,6 @@
 #include "postgres.h"
 
 #include <unistd.h>
-#ifdef HAVE_CRYPT_H
-#include <crypt.h>
-#endif
 
 #include "catalog/pg_authid.h"
 #include "common/md5.h"

src/include/pg_config.h.in

@@ -123,15 +123,9 @@
 /* Define to 1 if you have the <crtdefs.h> header file. */
 #undef HAVE_CRTDEFS_H
 
-/* Define to 1 if you have the `crypt' function. */
-#undef HAVE_CRYPT
-
 /* Define to 1 if you have the `CRYPTO_lock' function. */
 #undef HAVE_CRYPTO_LOCK
 
-/* Define to 1 if you have the <crypt.h> header file. */
-#undef HAVE_CRYPT_H
-
 /* Define to 1 if you have the declaration of `fdatasync', and to 0 if you
    don't. */
 #undef HAVE_DECL_FDATASYNC

src/include/pg_config.h.win32

@@ -93,12 +93,6 @@
 /* Define to 1 if your compiler handles computed gotos. */
 /* #undef HAVE_COMPUTED_GOTO */
 
-/* Define to 1 if you have the `crypt' function. */
-/* #undef HAVE_CRYPT */
-
-/* Define to 1 if you have the <crypt.h> header file. */
-/* #undef HAVE_CRYPT_H */
-
 /* Define to 1 if you have the declaration of `fdatasync', and to 0 if you
    don't. */
 #define HAVE_DECL_FDATASYNC 0

src/include/port.h

@@ -330,9 +330,6 @@ extern int	gettimeofday(struct timeval *tp, struct timezone *tzp);
  * Default "extern" declarations or macro substitutes for library routines.
  * When necessary, these routines are provided by files in src/port/.
  */
-#ifndef HAVE_CRYPT
-extern char *crypt(const char *key, const char *setting);
-#endif
 
 /* WIN32 handled in port/win32_port.h */
 #ifndef WIN32