sourcebuild.texi (Effective-Target Keywords): Document run_expensive_tests.

	gcc:
	* doc/sourcebuild.texi (Effective-Target Keywords): Document
	run_expensive_tests.

	gcc/testsuite:
	* lib/target-supports.exp
	(check_effective_target_run_expensive_tests): New proc.
	* gcc.c-torture/compile/limits-fnargs.c: Use
	dg-require-effective-target run_expensive_tests.

From-SVN: r164012

gcc/ChangeLog

 2010-09-08  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 
+	* doc/sourcebuild.texi (Effective-Target Keywords): Document
+	run_expensive_tests.
+
+2010-09-08  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
 	* toplev.c (output_stack_usage): Use lbasename instead of
 	basename.
 

gcc/doc/sourcebuild.texi

@@ -1680,6 +1680,11 @@ Target can compile using @code{pthread.h} with no errors or warnings.
 @item pthread_h
 Target has @code{pthread.h}.
 
+@item run_expensive_tests
+Expensive testcases (usually those that consume excessive amounts of CPU
+time) should be run on this target.  This can be enabled by setting the
+@env{GCC_TEST_RUN_EXPENSIVE} environment variable to a non-empty string.
+
 @item simulator
 Test system runs executables on a simulator (i.e. slowly) rather than
 hardware (i.e. fast).

gcc/testsuite/ChangeLog

+2010-09-08  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
+	* lib/target-supports.exp
+	(check_effective_target_run_expensive_tests): New proc.
+	* gcc.c-torture/compile/limits-fnargs.c: Use
+	dg-require-effective-target run_expensive_tests.
+
 2010-09-08  Jakub Jelinek  <jakub@redhat.com>
 
 	PR fortran/45597

gcc/testsuite/gcc.c-torture/compile/limits-fnargs.c

 /* { dg-timeout-factor 4.0 } */
+/* { dg-require-effective-target run_expensive_tests } */
 
 #define PAR1 int, int, int, int, int, int, int, int, int, int
 #define PAR2 PAR1, PAR1, PAR1, PAR1, PAR1, PAR1, PAR1, PAR1, PAR1, PAR1

gcc/testsuite/lib/target-supports.exp

@@ -3579,3 +3579,12 @@ proc check_effective_target_c++ { } {
     }
  return 0
 }
+
+# Return 1 if expensive testcases should be run.
+
+proc check_effective_target_run_expensive_tests { } {
+    if { [getenv GCC_TEST_RUN_EXPENSIVE] != "" } {
+        return 1
+    }
+    return 0
+}