* gdb.base/auxv.exp (core_works): Also check is_remote.

* gdb.base/checkpoint.exp, gdb.base/multi-forks.exp: Likewise.

gdb/testsuite/gdb.base/auxv.exp

@@ -50,7 +50,7 @@ if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {deb
 # Make it the working directory for gdb and its child.
 set coredir "${objdir}/${subdir}/coredir.[getpid]"
 file mkdir $coredir
-set core_works [isnative]
+set core_works [expr [isnative] && ! [is_remote target]]
 
 # Run GDB on the test program up to where it will dump core.
 

gdb/testsuite/gdb.base/checkpoint.exp

@@ -21,7 +21,7 @@ if $tracelevel then {
 	strace $tracelevel
 	}
 
-if { ![isnative] } then {
+if { [is_remote target] || ![isnative] } then {
     continue
 }
 

gdb/testsuite/gdb.base/multi-forks.exp

@@ -18,7 +18,7 @@ if $tracelevel then {
 	strace $tracelevel
 	}
 
-if { ![isnative] } then {
+if { [is_remote target] || ![isnative] } then {
     continue
 }