[tor-bugs] #9066 [- Select a component]: use a macro like CHECK_PRINTF for tor_sscanf

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#9066: use a macro like CHECK_PRINTF for tor_sscanf
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 Reporter:  x3j11                 |          Owner:                     
     Type:  defect                |         Status:  needs_review       
 Priority:  normal                |      Milestone:  Tor: 0.2.5.x-final 
Component:  - Select a component  |        Version:  Tor: 0.2.4.12-alpha
 Keywords:                        |         Parent:                     
   Points:                        |   Actualpoints:                     
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Changes (by x3j11):

  * status:  new => needs_review


Comment:

 Strategem: add checks to configure.ac to flag if the CC we're using
 supports the format attribute first of all (defining CC_FORMAT_ATTRIBUTE),
 and another if it triggers this warning (defining something like
 CC_FORMAT_ATTRIBUTE_STRICT). Then define something like
 DISABLE_FORMAT_STRICT in the affected test. Then, we have CHECK_SCANF is
 empty if !CC_FORMAT_ATTRIBUTE || (CC_FORMAT_ATTRIBUTE_STRICT &&
 DISABLE_FORMAT_STRICT).

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/9066#comment:1>
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