Split DIAG_* macros to new header libc-diag.h.

Quite a few tests include libc-internal.h just for the DIAG_* macros.
Split those macros to their own file, which can be included safely in
_ISOMAC mode.  I also moved ignore_value, since it seems logically
related, even though I didn't notice any tests needing it.

Also add -Wnonnull suppressions to two tests that _should_ have them,
but the error is masked when compiling against internal headers.

	* include/libc-diag.h: New file.  Define ignore_value,
	DIAG_PUSH_NEEDS_COMMENT, DIAG_POP_NEEDS_COMMENT,
	DIAG_IGNORE_NEEDS_COMMENT, and DIAG_IGNORE_Os_NEEDS_COMMENT here.

	* include/libc-internal.h: Definitions of above macros moved from
	here.  Include libc-diag.h.  Add copyright notice.

	* malloc/tst-malloc.c, malloc/tst-memcheck.c, malloc/tst-realloc.c
	* misc/tst-error1.c, posix/tst-dir.c, stdio-common/bug21.c
	* stdio-common/scanf14.c, stdio-common/scanf4.c, stdio-common/scanf7.c
	* stdio-common/test-vfprintf.c, stdio-common/tst-printf.c
	* stdio-common/tst-printfsz.c, stdio-common/tst-sprintf.c
	* stdio-common/tst-unlockedio.c, stdio-common/tstdiomisc.c
	* stdlib/bug-getcontext.c, string/tester.c, string/tst-endian.c
	* time/tst-strptime2.c, wcsmbs/tst-wcstof.c:
	Include libc-diag.h instead of libc-internal.h.

	* stdlib/tst-environ.c: Include libc-diag.h.  Suppress -Wnonnull for
	call to unsetenv (NULL).
	* nptl/tst-mutex1.c: Include libc-diag.h.  Suppress -Wnonnull for
	call to pthread_mutexattr_destroy (NULL).

10 files changed, 10 insertions, 10 deletions

diff --git a/stdio-common/bug21.c b/stdio-common/bug21.c
index ca27272ba1..7a8c6a3542 100644
--- a/stdio-common/bug21.c
+++ b/stdio-common/bug21.c
@@ -1,5 +1,5 @@
 #include <stdio.h>
-#include <libc-internal.h>
+#include <libc-diag.h>
 
 static int
 do_test (void)
diff --git a/stdio-common/scanf14.c b/stdio-common/scanf14.c
index cffccb0b19..2bcd9c9893 100644
--- a/stdio-common/scanf14.c
+++ b/stdio-common/scanf14.c
@@ -2,7 +2,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <wchar.h>
-#include <libc-internal.h>
+#include <libc-diag.h>
 
 #define FAIL() \
   do {							\
diff --git a/stdio-common/scanf4.c b/stdio-common/scanf4.c
index 9bb14bb16b..7a2abec89b 100644
--- a/stdio-common/scanf4.c
+++ b/stdio-common/scanf4.c
@@ -1,6 +1,6 @@
 #include <stdio.h>
 #include <stdlib.h>
-#include <libc-internal.h>
+#include <libc-diag.h>
 
 int
 main(int arc, char *argv[])
diff --git a/stdio-common/scanf7.c b/stdio-common/scanf7.c
index 53ddf4cb09..f568738d7e 100644
--- a/stdio-common/scanf7.c
+++ b/stdio-common/scanf7.c
@@ -1,6 +1,6 @@
 #include <stdio.h>
 #include <stdlib.h>
-#include <libc-internal.h>
+#include <libc-diag.h>
 
 int
 main (int argc, char *argv[])
diff --git a/stdio-common/test-vfprintf.c b/stdio-common/test-vfprintf.c
index f1805d5d00..f8bb9cee58 100644
--- a/stdio-common/test-vfprintf.c
+++ b/stdio-common/test-vfprintf.c
@@ -25,7 +25,7 @@
 #include <string.h>
 #include <unistd.h>
 #include <sys/stat.h>
-#include <libc-internal.h>
+#include <libc-diag.h>
 
 
 const char *locs[] =
diff --git a/stdio-common/tst-printf.c b/stdio-common/tst-printf.c
index 719b3eb08c..b6d62a5a2f 100644
--- a/stdio-common/tst-printf.c
+++ b/stdio-common/tst-printf.c
@@ -26,7 +26,7 @@
 #endif
 
 #include <float.h>
-#include <libc-internal.h>
+#include <libc-diag.h>
 
 /* This whole file is picayune tests of corner cases of printf format strings.
    The compiler warnings are not useful here.  */
diff --git a/stdio-common/tst-printfsz.c b/stdio-common/tst-printfsz.c
index 8a3385f94d..47aa8536b3 100644
--- a/stdio-common/tst-printfsz.c
+++ b/stdio-common/tst-printfsz.c
@@ -2,7 +2,7 @@
 #include <printf.h>
 #include <stdio.h>
 #include <string.h>
-#include <libc-internal.h>
+#include <libc-diag.h>
 
 #define V       12345678.12345678
 
diff --git a/stdio-common/tst-sprintf.c b/stdio-common/tst-sprintf.c
index d5284b9697..cbd35447a9 100644
--- a/stdio-common/tst-sprintf.c
+++ b/stdio-common/tst-sprintf.c
@@ -2,7 +2,7 @@
 #include <stdlib.h>
 #include <locale.h>
 #include <string.h>
-#include <libc-internal.h>
+#include <libc-diag.h>
 
 
 static int
diff --git a/stdio-common/tst-unlockedio.c b/stdio-common/tst-unlockedio.c
index 6eec6fdbac..35652ce772 100644
--- a/stdio-common/tst-unlockedio.c
+++ b/stdio-common/tst-unlockedio.c
@@ -20,7 +20,7 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
-#include <libc-internal.h>
+#include <libc-diag.h>
 
 int fd;
 static void do_prepare (void);
diff --git a/stdio-common/tstdiomisc.c b/stdio-common/tstdiomisc.c
index 9c7342d55f..89009e0549 100644
--- a/stdio-common/tstdiomisc.c
+++ b/stdio-common/tstdiomisc.c
@@ -3,7 +3,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <wchar.h>
-#include <libc-internal.h>
+#include <libc-diag.h>
 
 static int
 t1 (void)