ec11b13a21
This is a new commit for code under a different maintainer. Change-Id: I79fa403fec6a312238a9a4b18b35dbcafaa05439 Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>
104 lines
3.3 KiB
C
104 lines
3.3 KiB
C
/*
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* Copyright (c) 2017 Cisco and/or its affiliates.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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*/
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#ifndef __included_warnings_h__
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#define __included_warnings_h__
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/* Macros to check compiler version */
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#if defined(__GNUC__)
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#define COMPILER_VERSION_GTE(major, minor) \
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(__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
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#elif defined(__clang__)
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#define COMPILER_VERSION_GTE(major, minor) \
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(__clang_major__ > (major) || \
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(__clang_major__ == (major) && __clang_minor__ >= (minor)))
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#else /* disable all warning customization for all other compilers */
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#define COMPILER_VERSION_GTE(maj, min) 0
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#endif
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/* '#' needs to preceed a macro parameter */
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#define WARN_TOSTR(x) #x
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/*
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* Macros to toggle off/on warnings
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*
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* Start by silencing pragma warnings so that we can explicitly silence
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* a warning introduced on some compiler version and not get a warning on older
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* versions of that same compiler.
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*
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* gcc corresponding warning is "Wpargma"
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* clang corresponding warning is "Wunknown-warning-option"
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*
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* For example, Wtautological-compare is introduced in gcc-6 and this would
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* trigger a Wpargma warning on gcc-5.
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*
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* Example usage to disable -Wtautological-compare warning:
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* WARN_OFF(tautological-compare)
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* if (...) {
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* WARN_ON(tautological-compare)
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* ; // conditional code
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* }
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*/
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#if defined(__GNUC__) && COMPILER_VERSION_GTE(4, 6)
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/*
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* GCC option to locally ignore warning was introduced in gcc-4.6
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* gcc.gnu.org/gcc-4.6/changes.html
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*/
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#define WARN_PRAGMA(x) _Pragma (WARN_TOSTR (GCC diagnostic x))
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#define WARN_OFF(x) \
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WARN_PRAGMA (push) WARN_PRAGMA (ignored "-Wpragmas") \
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WARN_PRAGMA (push) WARN_PRAGMA (ignored WARN_TOSTR (-W##x))
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#define WARN_ON(x) \
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WARN_PRAGMA (pop) \
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WARN_PRAGMA (pop)
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#elif defined(__clang__) && COMPILER_VERSION_GTE(3, 3)
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/*
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* clang option to locally ignore warning was introduced in clang-3.3
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* releases.llvm.org/3.3/tools/clang/docs/UsersManual.html#controlling-diagnostics-via-pragmas
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*/
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#define WARN_PRAGMA(x) _Pragma (WARN_TOSTR (clang diagnostic x))
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#define WARN_OFF(x) \
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WARN_PRAGMA (push) WARN_PRAGMA (ignored "-Wunknown-warning-option") \
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WARN_PRAGMA (push) WARN_PRAGMA (ignored WARN_TOSTR (-W##x))
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#define WARN_ON(x) \
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WARN_PRAGMA (pop) \
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WARN_PRAGMA (pop)
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#else
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/* Ignore WARN_* instruction for all other compilers */
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#define WARN_OFF(x)
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#define WARN_ON(x)
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#endif
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/*
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* Clang supports a wider range of warnings than gcc.
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* Use those specific macros for the warnings that are only supported by clang
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*/
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#ifdef __clang__
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#define WARN_OFF_CLANG(x) WARN_OFF (x)
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#define WARN_ON_CLANG(x) WARN_ON (x)
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#else
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#define WARN_OFF_CLANG(x)
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#define WARN_ON_CLANG(x)
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#endif
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/*
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* fd.io coding-style-patch-verification: ON
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*
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* Local Variables:
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* eval: (c-set-style "gnu")
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* End:
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*/
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#endif /* __included_warnings_h__ */
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