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authorZack Weinberg <zackw@panix.com>2016-11-20 20:46:30 -0500
committerZack Weinberg <zackw@panix.com>2017-02-25 09:59:46 -0500
commite15f7de60c26bb75fe1923b17c5f0461164d1a41 (patch)
treed13a54b7a2d5c1f0046a5c7a704c42a6a8248219 /include
parent7caa5054afc1754a871333b1539e08a4af79444e (diff)
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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).
Diffstat (limited to 'include')
-rw-r--r--include/libc-diag.h74
-rw-r--r--include/libc-internal.h71
2 files changed, 92 insertions, 53 deletions
diff --git a/include/libc-diag.h b/include/libc-diag.h
new file mode 100644
index 0000000..db138c6
--- /dev/null
+++ b/include/libc-diag.h
@@ -0,0 +1,74 @@
+/* Macros for controlling diagnostic output from the compiler.
+ Copyright (C) 2014-2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _LIBC_DIAG_H
+#define _LIBC_DIAG_H 1
+
+/* Ignore the value of an expression when a cast to void does not
+ suffice (in particular, for a call to a function declared with
+ attribute warn_unused_result). */
+#define ignore_value(x) \
+ ({ __typeof__ (x) __ignored_value = (x); (void) __ignored_value; })
+
+/* The macros to control diagnostics are structured like this, rather
+ than a single macro that both pushes and pops diagnostic state and
+ takes the affected code as an argument, because the GCC pragmas
+ work by disabling the diagnostic for a range of source locations
+ and do not work when all the pragmas and the affected code are in a
+ single macro expansion. */
+
+/* Push diagnostic state. */
+#define DIAG_PUSH_NEEDS_COMMENT _Pragma ("GCC diagnostic push")
+
+/* Pop diagnostic state. */
+#define DIAG_POP_NEEDS_COMMENT _Pragma ("GCC diagnostic pop")
+
+#define _DIAG_STR1(s) #s
+#define _DIAG_STR(s) _DIAG_STR1(s)
+
+/* Ignore the diagnostic OPTION. VERSION is the most recent GCC
+ version for which the diagnostic has been confirmed to appear in
+ the absence of the pragma (in the form MAJOR.MINOR for GCC 4.x,
+ just MAJOR for GCC 5 and later). Uses of this pragma should be
+ reviewed when the GCC version given is no longer supported for
+ building glibc; the version number should always be on the same
+ source line as the macro name, so such uses can be found with grep.
+ Uses should come with a comment giving more details of the
+ diagnostic, and an architecture on which it is seen if possibly
+ optimization-related and not in architecture-specific code. This
+ macro should only be used if the diagnostic seems hard to fix (for
+ example, optimization-related false positives). */
+#define DIAG_IGNORE_NEEDS_COMMENT(version, option) \
+ _Pragma (_DIAG_STR (GCC diagnostic ignored option))
+
+/* Similar to DIAG_IGNORE_NEEDS_COMMENT the following macro ignores the
+ diagnostic OPTION but only if optimizations for size are enabled.
+ This is required because different warnings may be generated for
+ different optimization levels. For example a key piece of code may
+ only generate a warning when compiled at -Os, but at -O2 you could
+ still want the warning to be enabled to catch errors. In this case
+ you would use DIAG_IGNORE_Os_NEEDS_COMMENT to disable the warning
+ only for -Os. */
+#ifdef __OPTIMIZE_SIZE__
+# define DIAG_IGNORE_Os_NEEDS_COMMENT(version, option) \
+ _Pragma (_DIAG_STR (GCC diagnostic ignored option))
+#else
+# define DIAG_IGNORE_Os_NEEDS_COMMENT(version, option)
+#endif
+
+#endif /* libc-diag.h */
diff --git a/include/libc-internal.h b/include/libc-internal.h
index e4395dd..be6c021 100644
--- a/include/libc-internal.h
+++ b/include/libc-internal.h
@@ -1,5 +1,20 @@
-/* This file contains a number of internal prototype declarations that
- don't fit anywhere else. */
+/* Internal prototype declarations that don't fit anywhere else.
+ Copyright (C) 2000-2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
#ifndef _LIBC_INTERNAL
# define _LIBC_INTERNAL 1
@@ -74,56 +89,6 @@ extern __typeof (__profile_frequency) __profile_frequency attribute_hidden;
#define PTR_ALIGN_UP(base, size) \
((__typeof__ (base)) ALIGN_UP ((uintptr_t) (base), (size)))
-/* Ignore the value of an expression when a cast to void does not
- suffice (in particular, for a call to a function declared with
- attribute warn_unused_result). */
-#define ignore_value(x) \
- ({ __typeof__ (x) __ignored_value = (x); (void) __ignored_value; })
-
-/* The macros to control diagnostics are structured like this, rather
- than a single macro that both pushes and pops diagnostic state and
- takes the affected code as an argument, because the GCC pragmas
- work by disabling the diagnostic for a range of source locations
- and do not work when all the pragmas and the affected code are in a
- single macro expansion. */
-
-/* Push diagnostic state. */
-#define DIAG_PUSH_NEEDS_COMMENT _Pragma ("GCC diagnostic push")
-
-/* Pop diagnostic state. */
-#define DIAG_POP_NEEDS_COMMENT _Pragma ("GCC diagnostic pop")
-
-#define _DIAG_STR1(s) #s
-#define _DIAG_STR(s) _DIAG_STR1(s)
-
-/* Ignore the diagnostic OPTION. VERSION is the most recent GCC
- version for which the diagnostic has been confirmed to appear in
- the absence of the pragma (in the form MAJOR.MINOR for GCC 4.x,
- just MAJOR for GCC 5 and later). Uses of this pragma should be
- reviewed when the GCC version given is no longer supported for
- building glibc; the version number should always be on the same
- source line as the macro name, so such uses can be found with grep.
- Uses should come with a comment giving more details of the
- diagnostic, and an architecture on which it is seen if possibly
- optimization-related and not in architecture-specific code. This
- macro should only be used if the diagnostic seems hard to fix (for
- example, optimization-related false positives). */
-#define DIAG_IGNORE_NEEDS_COMMENT(version, option) \
- _Pragma (_DIAG_STR (GCC diagnostic ignored option))
-
-/* Similar to DIAG_IGNORE_NEEDS_COMMENT the following macro ignores the
- diagnostic OPTION but only if optimizations for size are enabled.
- This is required because different warnings may be generated for
- different optimization levels. For example a key piece of code may
- only generate a warning when compiled at -Os, but at -O2 you could
- still want the warning to be enabled to catch errors. In this case
- you would use DIAG_IGNORE_Os_NEEDS_COMMENT to disable the warning
- only for -Os. */
-#ifdef __OPTIMIZE_SIZE__
-# define DIAG_IGNORE_Os_NEEDS_COMMENT(version, option) \
- _Pragma (_DIAG_STR (GCC diagnostic ignored option))
-#else
-# define DIAG_IGNORE_Os_NEEDS_COMMENT(version, option)
-#endif
+#include <libc-diag.h>
#endif /* _LIBC_INTERNAL */