Makefile directive interpretation











up vote
0
down vote

favorite












I am trying to reverse this Makefile.



However in the folowing lines:



install-packer: tmp/packer_$(PACKER_VERSION).zip

    mkdir -p ~/bin

    unzip -o -d ~/bin $<

    chmod +x $(PACKER)

    @echo Packer $(PACKER_VERSION) was successfully installed!



# Install packer only if it doesn't exist

$(PACKER):

    @$(MAKE) install-packer



tmp/packer_$(PACKER_VERSION).zip:

    curl -fsSLo $@ 'https://releases.hashicorp.com/packer/$(PACKER_VERSION)/packer_$(PACKER_VERSION)_$(UNAME)_amd64.zip'

    @echo Downloaded new Packer version: $(PACKER_VERSION)!


I am unable to understand the following directive/dependency:



# Install packer only if it doesn't exist

$(PACKER):

    @$(MAKE) install-packer


How it will




install packer only if it doesn't exist




?






makefile







share|improve this question


























    up vote
    0
    down vote

    favorite












    I am trying to reverse this Makefile.



    However in the folowing lines:



    install-packer: tmp/packer_$(PACKER_VERSION).zip
    
    mkdir -p ~/bin
    
    unzip -o -d ~/bin $<
    
    chmod +x $(PACKER)
    
    @echo Packer $(PACKER_VERSION) was successfully installed!
    

    
# Install packer only if it doesn't exist
    
$(PACKER):
    
    @$(MAKE) install-packer
    

    
tmp/packer_$(PACKER_VERSION).zip:
    
    curl -fsSLo $@ 'https://releases.hashicorp.com/packer/$(PACKER_VERSION)/packer_$(PACKER_VERSION)_$(UNAME)_amd64.zip'
    
    @echo Downloaded new Packer version: $(PACKER_VERSION)!


    I am unable to understand the following directive/dependency:



    # Install packer only if it doesn't exist
    
$(PACKER):
    
    @$(MAKE) install-packer


    How it will




    install packer only if it doesn't exist




    ?






    makefile







    share|improve this question
























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      I am trying to reverse this Makefile.



      However in the folowing lines:



      install-packer: tmp/packer_$(PACKER_VERSION).zip
      
    mkdir -p ~/bin
      
    unzip -o -d ~/bin $<
      
    chmod +x $(PACKER)
      
    @echo Packer $(PACKER_VERSION) was successfully installed!
      

      
# Install packer only if it doesn't exist
      
$(PACKER):
      
    @$(MAKE) install-packer
      

      
tmp/packer_$(PACKER_VERSION).zip:
      
    curl -fsSLo $@ 'https://releases.hashicorp.com/packer/$(PACKER_VERSION)/packer_$(PACKER_VERSION)_$(UNAME)_amd64.zip'
      
    @echo Downloaded new Packer version: $(PACKER_VERSION)!


      I am unable to understand the following directive/dependency:



      # Install packer only if it doesn't exist
      
$(PACKER):
      
    @$(MAKE) install-packer


      How it will




      install packer only if it doesn't exist




      ?






      makefile







      share|improve this question













      I am trying to reverse this Makefile.



      However in the folowing lines:



      install-packer: tmp/packer_$(PACKER_VERSION).zip
      
    mkdir -p ~/bin
      
    unzip -o -d ~/bin $<
      
    chmod +x $(PACKER)
      
    @echo Packer $(PACKER_VERSION) was successfully installed!
      

      
# Install packer only if it doesn't exist
      
$(PACKER):
      
    @$(MAKE) install-packer
      

      
tmp/packer_$(PACKER_VERSION).zip:
      
    curl -fsSLo $@ 'https://releases.hashicorp.com/packer/$(PACKER_VERSION)/packer_$(PACKER_VERSION)_$(UNAME)_amd64.zip'
      
    @echo Downloaded new Packer version: $(PACKER_VERSION)!


      I am unable to understand the following directive/dependency:



      # Install packer only if it doesn't exist
      
$(PACKER):
      
    @$(MAKE) install-packer


      How it will




      install packer only if it doesn't exist




      ?






      makefile




      makefile






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked 19 hours ago









      pkaramol

      1033




      1033



























          active

          oldest

          votes











          Your Answer








          StackExchange.ready(function() {
          var channelOptions = {
          tags: "".split(" "),
          id: "3"
          };
          initTagRenderer("".split(" "), "".split(" "), channelOptions);

          StackExchange.using("externalEditor", function() {
          // Have to fire editor after snippets, if snippets enabled
          if (StackExchange.settings.snippets.snippetsEnabled) {
          StackExchange.using("snippets", function() {
          createEditor();
          });
          }
          else {
          createEditor();
          }
          });

          function createEditor() {
          StackExchange.prepareEditor({
          heartbeatType: 'answer',
          convertImagesToLinks: true,
          noModals: true,
          showLowRepImageUploadWarning: true,
          reputationToPostImages: 10,
          bindNavPrevention: true,
          postfix: "",
          imageUploader: {
          brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
          contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
          allowUrls: true
          },
          onDemand: true,
          discardSelector: ".discard-answer"
          ,immediatelyShowMarkdownHelp:true
          });


          }
          });














           

          draft saved


          draft discarded


















          StackExchange.ready(
          function () {
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fsuperuser.com%2fquestions%2f1374955%2fmakefile-directive-interpretation%23new-answer', 'question_page');
          }
          );

          Post as a guest























          active

          oldest

          votes













          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes
















           

          draft saved


          draft discarded



















































           


          draft saved


          draft discarded














          StackExchange.ready(
          function () {
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fsuperuser.com%2fquestions%2f1374955%2fmakefile-directive-interpretation%23new-answer', 'question_page');
          }
          );

          Post as a guest






































































          -

          Popular posts from this blog

          Список кардиналов, возведённых папой римским Каликстом III

          Image
          Папа Каликст III Кардиналы, возведённые Папой римским Каликстом III  — 9 прелатов и мирян были возведены в сан кардинала на двух Консисториях за трёхлетний понтификат Каликста III. Самой крупной консисторией были Консистория от 17 декабря 1456 года, на которой было возведено шесть кардиналов. Папа Каллист III хотел назвать отца Жан Сорета, O.Carm., епископом или кардиналом, но он отказался, потому что хотел посвятить себя своему ордену и продвижению религиозного рвения и соблюдения устава монашеского ордена. Консистория от 17 сентября 1456 года | Луис Хуан дель Мила, племянник Его Святейшества, епископ Сегорбе (королевство Арагон); Жайме Португальский, администратор архиепархии Лиссабона (королевство Португалия); Родриго де Борха-и-Борха, племянник Его Святейшества, ризничий Валенсии (Папская область). Консистория от 17 декабря 1456 года | Ринальдо Пишичелло, архиепископ Неаполя (Неаполитанское королевство); Хуан де Мелья, епископ Саморы (королевство Ка
          Read more

          Deduzione

          Image
          .mw-parser-output .nota-disambigua{clear:both;margin-bottom:.5em;border:1px solid #CCC;padding-left:4px}.mw-parser-output .nota-disambigua i{vertical-align:middle} Disambiguazione – Se stai cercando il teorema, vedi Teorema di deduzione . Disambiguazione – Se stai cercando il concetto di deduzione in economia, vedi deduzione fiscale . Il ragionamento deduttivo umano assimilato a un meccanismo Il metodo deduttivo o deduzione è il procedimento razionale che fa derivare una certa conclusione da premesse più generiche, dentro cui quella conclusione è implicita. Il termine significa letteralmente «condurre da», perché proviene dal latino "de" (traducibile con da , preposizione indicante provenienza, o moto di discesa dall'alto verso il basso) e "ducere" ( condurre ). Questo metodo parte da postulati e princìpi primi e, attraverso una serie di rigorose concatenazioni logiche, procede verso determinazioni più particolari attinenti alla realtà tangi
          Read more

          Mysql.sock missing - “Can't connect to local MySQL server through socket”

          Image
          .everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ height:90px;width:728px;box-sizing:border-box; } 0 Operating System - OSX 10.11.2 MAMP version - 3.5 I'm following along with this guide, setting up wordpress with Xammp on PC and MAMP on Mac, where I'm in step "Mac - 4" is asked to input: "In the Terminal run: /Applications/MAMP/Library/bin/mysqladmin -u root -p password {Your Windows MySQL password here}" However, this (with out bracket text) results in error message: error: 'Can't connect to local MySQL server through socket '/Applications/MAMP/tmp/mysql/mysql.sock' (2)' Check that mysqld is running and that the socket: '/Applications/MAMP/tmp/mysql/mysql.sock'
          Read more