patch 9.1.1497: Link error with shm_open()

Problem:  Link error with shm_open()
          (gcanat, after v9.1.1485)
Solution: use AC_LINK_IFELSE instead of AC_COMPILE_IFELSE

fixes: #17634

Signed-off-by: Christian Brabandt <cb@256bit.org>

src/auto/configure

@@ -9080,7 +9080,7 @@ shm_open("/test", O_CREAT, 0600);
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"
+if ac_fn_c_try_link "$LINENO"
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }; printf "%s\n" "#define HAVE_SHM_OPEN 1" >>confdefs.h
@@ -9090,7 +9090,8 @@ else case e in #(
 printf "%s\n" "no" >&6; } ;;
 esac
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
 CPPFLAGS=$cppflags_save
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking --with-wayland argument" >&5

src/configure.ac

@@ -2392,7 +2392,7 @@ dnl defining FEAT_XFONTSET is delayed, so that it can be disabled for no GUI
 AC_MSG_CHECKING(if shm_open is available)
 cppflags_save=$CPPFLAGS
 CPPFLAGS="$CPPFLAGS $X_CFLAGS"
-AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
+AC_LINK_IFELSE([AC_LANG_PROGRAM(
 		   [#include <sys/mman.h>
 		    #include <sys/stat.h>
 		    #include <fcntl.h>], [shm_open("/test", O_CREAT, 0600);])],

src/version.c

@@ -719,6 +719,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1497,
 /**/
     1496,
 /**/