compilation warning # pragma once

Collapse
This topic is closed.
X
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • Subrat
    #1

    compilation warning # pragma once

    Hello,
    I have used #pragma once in a header file.
    During compilation I get a warning : #pragma once is obsolete.
    How do I switch off this warning, without making any change to my make file?

    Thanks in Advance,
    Subrat


    Tags: None
    • red floyd
      #2
      Re: compilation warning # pragma once

      Subrat wrote:
      Hello,
      I have used #pragma once in a header file.
      During compilation I get a warning : #pragma once is obsolete.
      How do I switch off this warning, without making any change to my make file?
      >
      Thanks in Advance,
      Subrat
      >
      >
      Wrong group. #pragma's are implementation specific. How to disable
      warnings is implementation specific. Try a group with microsoft or
      vc in its name.

      See FAQ 5.9 http://www.parashift.com/c++-faq-lit...t.html#faq-5.9

        Comment

        • Jim Langston
          #3
          Re: compilation warning # pragma once

          "Subrat" <subrat.sahani@ in.bosch.comwro te in message
          news:g4f2ep$cmu $1@news4.fe.int ernet.bosch.com ...
          Hello,
          I have used #pragma once in a header file.
          During compilation I get a warning : #pragma once is obsolete.
          How do I switch off this warning, without making any change to my make
          file?
          Easiest way, go into the header file, remvoe #pragma once and replace it
          with the proper include guards.
          #ifndef MYFILE_H
          #define MYFILE_H

          // header here

          #endif

          MYFILE_HEADER
          is also sometimes used.


            Comment

            • James Kanze
              #4
              Re: compilation warning # pragma once

              On Jul 2, 10:42 am, "Jim Langston" <tazmas...@rock etmail.comwrote :
              "Subrat" <subrat.sah...@ in.bosch.comwro te in message
              news:g4f2ep$cmu $1@news4.fe.int ernet.bosch.com ...
              I have used #pragma once in a header file.
              During compilation I get a warning : #pragma once is obsolete.
              How do I switch off this warning, without making any change to my make
              file?
              Easiest way, go into the header file, remvoe #pragma once and replace it
              with the proper include guards.
              #ifndef MYFILE_H
              #define MYFILE_H
              // header here
              #endif
              MYFILE_HEADER
              is also sometimes used.
              Many different conventions are sometimes used (inluding some
              which are formally illegal, e.g. _MYFILE_H). The important
              point is to avoid the risk of collisions. For this reason, most
              libraries will try to munge the name of the library into the
              guard (e.g. BOOST_..._INCLU DED); anything really professional
              will probably include some sort of random sequence as well. (I
              get toto_hh_2008070 2Jbqi2me5hF1pQr gColbxnIMk for a file toto.hh,
              although I'll get something else if I create it again; the last
              24 characters are generated from input from /dev/random.
              Another possibility might be an MD-5 or SHA-1 digest of the
              hostname and the full pathname from the root, or the filename,
              programmer name and the current time and date.)

              --
              James Kanze (GABI Software) email:james.kan ze@gmail.com
              Conseils en informatique orientée objet/
              Beratung in objektorientier ter Datenverarbeitu ng
              9 place Sémard, 78210 St.-Cyr-l'École, France, +33 (0)1 30 23 00 34

                Comment

                Previous template Next
                Working...