Fix some warnings in the absence of FP round/exception support

Due to tile missing a bunch of FP exception and rounding
support, the tests generate warnings.  These changes fix the
warnings by just not compiling some unused functions, and
adding some attribute ((unused)) tags.

ChangeLog

@@ -1,3 +1,17 @@
+2014-12-30  Chris Metcalf  <cmetcalf@ezchip.com>
+
+	* math/test-fenv.c (test_single_exception, set_single_exc,
+	feenv_nomask_test, feenv_mask_test, feexcp_nomask_test,
+	feexcp_mask_test, feenable_test, fe_single_test): Add
+	[!FE_ALL_EXCEPT] test so these routines are not compiled in the
+	case where they are not used.
+	* math/libm-test.inc: Likewise.
+	* setjmp/test-setjmp-fp.c: Mark attribute ((unused)) on variable
+	unused in the absence of FP rounding/exception support.
+	* stdio-common/tst-printf-round.c: Likewise.
+	* stdlib/tst-strtod-round.c: Likewise.
+	* stdlib/tst-strtod-underflow.c: Likewise.
+
 2014-12-30  Joseph Myers  <joseph@codesourcery.com>
 
 	[BZ #17723]

math/libm-test.inc

@@ -590,6 +590,7 @@ print_complex_max_error (const char *func_name)
 }
 
 
+#if FE_ALL_EXCEPT
 /* Test whether a given exception was raised.  */
 static void
 test_single_exception (const char *test_name,
@@ -636,7 +637,7 @@ test_single_exception (const char *test_name,
 
 # endif
 }
-
+#endif
 
 /* Test whether exceptions given by EXCEPTION are raised.  Ignore thereby
    allowed but not required exceptions.

math/test-fenv.c

@@ -54,6 +54,7 @@
 
 static int count_errors;
 
+#if FE_ALL_EXCEPT
 /* Test whether a given exception was raised.  */
 static void
 test_single_exception (short int exception,
@@ -84,6 +85,7 @@ test_single_exception (short int exception,
         }
     }
 }
+#endif
 
 static void
 test_exceptions (const char *test_name, short int exception,
@@ -164,6 +166,7 @@ test_rounding (const char *test_name, int rounding_mode)
 }
 
 
+#if FE_ALL_EXCEPT
 static void
 set_single_exc (const char *test_name, int fe_exc, fexcept_t exception)
 {
@@ -195,6 +198,7 @@ set_single_exc (const char *test_name, int fe_exc, fexcept_t exception)
   feclearexcept (exception);
   test_exceptions (str, ALL_EXC ^ fe_exc, 0);
 }
+#endif
 
 static void
 fe_tests (void)
@@ -227,6 +231,7 @@ fe_tests (void)
 #endif
 }
 
+#if FE_ALL_EXCEPT
 /* Test that program aborts with no masked interrupts */
 static void
 feenv_nomask_test (const char *flag_name, int fe_exc)
@@ -613,6 +618,7 @@ fe_single_test (const char *flag_name, int fe_exc)
   feenv_mask_test (flag_name, fe_exc);
   feenable_test (flag_name, fe_exc);
 }
+#endif
 
 
 static void

setjmp/tst-setjmp-fp.c

@@ -22,7 +22,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-static jmp_buf env;
+static jmp_buf __attribute__ ((unused)) env;
 static int result = 0;
 
 #if defined FE_TONEAREST && defined FE_TOWARDZERO

stdio-common/tst-printf-round.c

@@ -164,7 +164,7 @@ test_hex_in_one_mode (double d, const char *fmt, const char *const expected[4],
 static int
 do_test (void)
 {
-  int save_round_mode = fegetround ();
+  int save_round_mode __attribute__ ((unused)) = fegetround ();
   int result = 0;
 
   for (size_t i = 0; i < sizeof (dec_tests) / sizeof (dec_tests[0]); i++)

stdlib/tst-strtod-round.c

@@ -7874,7 +7874,7 @@ test_in_one_mode (const char *s, const struct test_results *expected,
 static int
 do_test (void)
 {
-  int save_round_mode = fegetround ();
+  int save_round_mode __attribute__ ((unused)) = fegetround ();
   int result = 0;
   for (size_t i = 0; i < sizeof (tests) / sizeof (tests[0]); i++)
     {

stdlib/tst-strtod-underflow.c

@@ -171,7 +171,7 @@ test_in_one_mode (const char *s, enum underflow_case c, int rm,
 static int
 do_test (void)
 {
-  int save_round_mode = fegetround ();
+  int save_round_mode __attribute__ ((unused)) = fegetround ();
   int result = 0;
 #ifdef FE_TONEAREST
   const int fe_tonearest = FE_TONEAREST;