Add check_effective_target_gettimeofday and use it in gcc.dg/lto/pr60449_0.c.

gcc/
	* doc/sourcebuild.texi (Effective-Target Keywords, Environment
	attributes): Document gettimeofday.

gcc/testsuite/

	* gcc.dg/lto/pr60449_0.c: Add dg-require-effective-target for
	gettimeofday.  Remove dg-skip-if for AVR.
	* lib/target-supports.exp (check_effective_target_gettimeofday):
	New proc.

From-SVN: r245921

gcc/ChangeLog

+2017-03-06  Toma Tabacu  <toma.tabacu@imgtec.com>
+
+	* doc/sourcebuild.texi (Effective-Target Keywords, Environment
+	attributes): Document gettimeofday.
+
 2017-03-06  Robin Dapp  <rdapp@linux.vnet.ibm.com>
 
 	* config/s390/s390.c (s390_option_override_internal): Set

gcc/doc/sourcebuild.texi

@@ -1914,6 +1914,9 @@ Target is @samp{freestanding} as defined in section 4 of the C99 standard.
 Effectively, it is a target which supports no extra headers or libraries
 other than what is considered essential.
 
+@item gettimeofday
+Target supports @code{gettimeofday}.
+
 @item init_priority
 Target supports constructors with initialization priority arguments.
 

gcc/testsuite/ChangeLog

+2017-03-06  Toma Tabacu  <toma.tabacu@imgtec.com>
+
+	* gcc.dg/lto/pr60449_0.c: Add dg-require-effective-target for
+	gettimeofday.  Remove dg-skip-if for AVR.
+	* lib/target-supports.exp (check_effective_target_gettimeofday):
+	New proc.
+
 2017-03-06  Robin Dapp  <rdapp@linux.vnet.ibm.com>
 
 	* gcc.target/s390/hotpatch-1.c: Check for nopr %r0.

gcc/testsuite/gcc.dg/lto/pr60449_0.c

 /* { dg-lto-do link } */
-/* { dg-skip-if "Needs gettimeofday" { "avr-*-*" } } */
+/* { dg-require-effective-target gettimeofday } */
 
 extern int printf (const char *__restrict __format, ...);
 typedef long int __time_t;

gcc/testsuite/lib/target-supports.exp

@@ -968,6 +968,11 @@ proc check_effective_target_setrlimit {} {
     return [check_function_available "setrlimit"]
 }
 
+# Return 1 if the target supports gettimeofday, 0 otherwise.
+proc check_effective_target_gettimeofday {} {
+    return [check_function_available "gettimeofday"]
+}
+
 # Return 1 if the target supports swapcontext, 0 otherwise.
 proc check_effective_target_swapcontext {} {
     return [check_no_compiler_messages swapcontext executable {