2015-04-09  Luis Machado  <lgustavo@codesourcery.com>

	gdb/testsuite/
	* gdb.base/coredump-filter.exp: Restrict test to Linux systems only.
	Handle the case of targets that do not provide PID information.

diff --git a/gdb/testsuite/gdb.base/coredump-filter.exp b/gdb/testsuite/gdb.base/coredump-filter.exp
index f3203be..4c6c6ed 100644
--- a/gdb/testsuite/gdb.base/coredump-filter.exp
+++ b/gdb/testsuite/gdb.base/coredump-filter.exp
@@ -15,6 +15,12 @@
 
 standard_testfile
 
+# This test is Linux-only.
+if ![istarget *-*-linux*] then {
+    unsupported "coredump-filter.exp"
+    return -1
+}
+
 if { [prepare_for_testing "failed to prepare" $testfile $srcfile debug] } {
     untested "could not compile test program"
     return -1
@@ -146,6 +152,11 @@ gdb_test_multiple "info inferiors" "getting inferior pid" {
     -re "process \($decimal\).*\r\n$gdb_prompt $" {
 	set infpid $expect_out(1,string)
     }
+    -re "Remote target.*$gdb_prompt $" {
+	# If the target does not provide PID information (like QEMU), just bail
+	# out as the rest of the test may rely on it, giving spurious failures.
+	return -1
+    }
 }
 
 # Get the main function's address.