[tor-bugs] #27900 [- Select a component]: Please establish which C standard tor code complies with

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#27900: Please establish which C standard tor code complies with
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 Reporter:  yurivict271  |          Owner:  (none)
     Type:  defect       |         Status:  new
 Priority:  Medium       |      Component:  - Select a component
  Version:               |       Severity:  Normal
 Keywords:               |  Actual Points:
Parent ID:               |         Points:
 Reviewer:               |        Sponsor:
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 Currently, tor is built without the -std=xx flag, and it isn't clear what
 C standard is compiler expected to use.

 Please add one of -std=c90, -std=c99, -std=c11, -std=c17 to compilation
 lines, add the corresponding macro to configure.ac:
 > AX_CHECK_COMPILE_FLAG([-std=cNN], [CFLAGS="$CFLAGS -std=cNN"])

 Reason#1: in FreeBSD we have several architectures some of which use
 different compilers (gcc/clang/etc) It is good to take guessing from the
 process and establish what standard the code complies with.

 Reason#2: Some compilers might default to the older standard where a newer
 standard is required.

 My guess is that the standard is c11.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/27900>
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