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37 id 1TG5xR-0002i5-QR; Mon, 24 Sep 2012 12:32:09 +0200
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38 From: Justus Winter <4winter@informatik.uni-hamburg.de>
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39 To: notmuch@notmuchmail.org
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40 Subject: [PATCH 2/5] RFC: Provide a NORETURN_ATTRIBUTE macro similar to
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42 Date: Mon, 24 Sep 2012 12:31:54 +0200
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44 <1348482717-10340-3-git-send-email-4winter@informatik.uni-hamburg.de>
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47 <1348482717-10340-1-git-send-email-4winter@informatik.uni-hamburg.de>
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48 References: <20120922161256.GE26662@mit.edu>
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64 This attribute is understood by gcc since version 2.5. clang provides
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65 support for testing for function attributes using __has_attribute. For
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66 other compilers this macro evaluates to the empty string.
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68 Note: This is work in progress, please don't merge this patch. The
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69 question that needs to be discussed is where this kind of macro should
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72 Signed-off-by: Justus Winter <4winter@informatik.uni-hamburg.de>
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74 util/error_util.h | 16 ++++++++++++++++
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75 1 file changed, 16 insertions(+)
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77 diff --git a/util/error_util.h b/util/error_util.h
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78 index 1b11047..27e119f 100644
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79 --- a/util/error_util.h
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80 +++ b/util/error_util.h
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82 #define __has_attribute(x) 0
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85 +/* Provide a NORETURN_ATTRIBUTE macro similar to PRINTF_ATTRIBUTE from
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88 + * This attribute is understood by gcc since version 2.5. clang
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89 + * provides support for testing for function attributes.
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91 +#ifndef NORETURN_ATTRIBUTE
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92 +#if (__GNUC__ >= 3 || \
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93 + (__GNUC__ == 2 && __GNUC_MINOR__ >= 5) || \
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94 + __has_attribute (noreturn))
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95 +#define NORETURN_ATTRIBUTE __attribute__ ((noreturn))
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97 +#define NORETURN_ATTRIBUTE
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101 /* There's no point in continuing when we've detected that we've done
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102 * something wrong internally (as opposed to the user passing in a
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