{"id":563,"date":"2017-10-29T20:36:00","date_gmt":"2017-10-29T19:36:00","guid":{"rendered":"http:\/\/systev.com\/?p=563"},"modified":"2019-06-09T20:05:10","modified_gmt":"2019-06-09T18:05:10","slug":"building-several-executables-in-one-eclipse-cdt-project","status":"publish","type":"post","link":"https:\/\/systev.com\/building-several-executables-in-one-eclipse-cdt-project\/","title":{"rendered":"Building several executables in one Eclipse CDT project"},"content":{"rendered":"<p>After <a href=\"http:\/\/systev.com\/importing-c-projects-into-eclipse-cdt\/\" target=\"_blank\" rel=\"noopener noreferrer\">having imported some C projects into Eclipse CDT<\/a>, I needed, for one of the projects, to build several executables, all of them being defined in the same project. What&#8217;s more, some of the executables had to be linked with object files created by another project. This article describes the configuration I set up to meet theses requirements.<\/p>\n<p><!--more--><\/p>\n<h3>Context<\/h3>\n<p>Let&#8217;s consider the following context:<\/p>\n<ul>\n<li>I have two projects: <tt>projectA<\/tt> and <tt>projectB<\/tt><\/li>\n<li><tt>projectB<\/tt> defines one executable, resulting from <tt>mainb1.c<\/tt> source file<\/li>\n<li>a new source file, <tt>mainb2.c<\/tt>, is added to <tt>projectB<\/tt>. It requires to be linked with <tt>functiona2.o<\/tt>, generated in <tt>projectA<\/tt>, in order to get another executable<\/li>\n<li>I want to be able to build this executable only<\/li>\n<\/ul>\n<p>I\u2019m using <em>Eclipse Oxygen 1a Release<\/em>, on <em>Linux Mint 18.2<\/em>.<\/p>\n<h3>Creating a configuration<\/h3>\n<p>The first step is the creation of a configuration that will be used to generate the new executable, independently of the existing one:<\/p>\n<ul>\n<li><strong>Project \/ Build Configurations \/ Manage&#8230; \/ New&#8230;<\/strong><\/li>\n<li>name it <tt>projectBmain1<\/tt>, for instance<\/li>\n<li>set the new configuration active, in the <strong>Manage Configurations<\/strong> window, or later, from <strong>Project \/ Build Configurations \/ Set Active<\/strong><\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-541 aligncenter\" src=\"http:\/\/systev.com\/wp-content\/uploads\/2017\/10\/eclipse-07-300x172.png\" alt=\"\" width=\"300\" height=\"172\" srcset=\"https:\/\/systev.com\/wp-content\/uploads\/2017\/10\/eclipse-07-300x172.png 300w, https:\/\/systev.com\/wp-content\/uploads\/2017\/10\/eclipse-07.png 335w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<h3>Adding a header path<\/h3>\n<p>Add path to <tt>projectA<\/tt> header files:<\/p>\n<ul>\n<li><strong>Project \/ Properties \/ C\/C++ General \/ Paths and Symbols<\/strong><\/li>\n<li>in <strong>Languages column<\/strong>, select <strong>GNU C<\/strong><\/li>\n<li>click on <strong>Add&#8230;<\/strong> button<\/li>\n<li>check <strong>Add to all configurations<\/strong><\/li>\n<li>click on <strong>Workspace&#8230;<\/strong> button<\/li>\n<li>select include folder<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-542 size-medium\" src=\"http:\/\/systev.com\/wp-content\/uploads\/2017\/10\/eclipse-08-300x178.png\" alt=\"\" width=\"300\" height=\"178\" srcset=\"https:\/\/systev.com\/wp-content\/uploads\/2017\/10\/eclipse-08-300x178.png 300w, https:\/\/systev.com\/wp-content\/uploads\/2017\/10\/eclipse-08.png 344w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>I observed that I had to check <strong>Add to all configurations<\/strong>, to ensure that the directory was added to the project. Kind of weird&#8230;<\/p>\n<h3>Configuring executable generation<\/h3>\n<ul>\n<li>for every source file containing a <tt>main()<\/tt> function, other than <tt>mainb2.c<\/tt>, right-click on it, select <strong>Resource Configurations \/ Exclude from Build&#8230;<\/strong> and check <tt>projectBmain1<\/tt> configuration<\/li>\n<\/ul>\n<p><a href=\"http:\/\/systev.com\/wp-content\/uploads\/2017\/10\/eclipse-09.png\" target=\"_blank\" rel=\"noopener noreferrer\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-544 aligncenter\" src=\"http:\/\/systev.com\/wp-content\/uploads\/2017\/10\/eclipse-09-mid.png\" alt=\"\" width=\"258\" height=\"295\" \/><\/a><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-545 aligncenter\" src=\"http:\/\/systev.com\/wp-content\/uploads\/2017\/10\/eclipse-10-240x300.png\" alt=\"\" width=\"240\" height=\"300\" srcset=\"https:\/\/systev.com\/wp-content\/uploads\/2017\/10\/eclipse-10-240x300.png 240w, https:\/\/systev.com\/wp-content\/uploads\/2017\/10\/eclipse-10.png 340w\" sizes=\"(max-width: 240px) 100vw, 240px\" \/><\/p>\n<h3>Declaring project dependency<\/h3>\n<p><tt>ProjectB<\/tt> depends on <tt>projectA<\/tt>, as it uses one of its files. Declare this dependency:<\/p>\n<ul>\n<li><strong>Project \/ Properties \/ Project References<\/strong><\/li>\n<li>check <tt>projectA<\/tt><\/li>\n<\/ul>\n<p><a href=\"http:\/\/systev.com\/wp-content\/uploads\/2017\/10\/eclipse-11.png\" target=\"_blank\" rel=\"noopener noreferrer\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-547 aligncenter\" src=\"http:\/\/systev.com\/wp-content\/uploads\/2017\/10\/eclipse-11-mid-300x197.png\" alt=\"\" width=\"300\" height=\"197\" srcset=\"https:\/\/systev.com\/wp-content\/uploads\/2017\/10\/eclipse-11-mid-300x197.png 300w, https:\/\/systev.com\/wp-content\/uploads\/2017\/10\/eclipse-11-mid.png 411w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<h3>Declaring external object file<\/h3>\n<p>To declare that <tt>functiona2.o<\/tt> object file from <tt>projectA<\/tt> must be linked with the executable:<\/p>\n<ul>\n<li><strong>Project \/ Properties \/ C\/C++ Build \/ Settings \/ Tool Settings<\/strong><\/li>\n<li>select <strong>GCC Linker \/ Miscellaneous<\/strong><\/li>\n<li>click on the <strong>Add&#8230;<\/strong> icon for <strong>Other objects<\/strong><\/li>\n<li>click on <strong>Workspace&#8230;<\/strong> button and select <tt>functiona2.o<\/tt> file. It can be found in a subdirectory of <tt>projectA<\/tt> directory. The name of this subdirectory is the name of the configuration used to build <tt>projectA<\/tt> executable. The default name is&#8230; <tt>Default<\/tt>. Intermediate subdirectories can exist, depending on source files directory hierarchy. In our example, that&#8217;s <tt>Default\/src<\/tt>.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-548 aligncenter\" src=\"http:\/\/systev.com\/wp-content\/uploads\/2017\/10\/eclipse-12-248x300.png\" alt=\"\" width=\"248\" height=\"300\" srcset=\"https:\/\/systev.com\/wp-content\/uploads\/2017\/10\/eclipse-12-248x300.png 248w, https:\/\/systev.com\/wp-content\/uploads\/2017\/10\/eclipse-12.png 340w\" sizes=\"(max-width: 248px) 100vw, 248px\" \/><\/p>\n<h3><a href=\"http:\/\/systev.com\/wp-content\/uploads\/2017\/10\/eclipse-13.png\" target=\"_blank\" rel=\"noopener noreferrer\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-550 aligncenter\" src=\"http:\/\/systev.com\/wp-content\/uploads\/2017\/10\/eclipse-13-mid-300x215.png\" alt=\"\" width=\"300\" height=\"215\" srcset=\"https:\/\/systev.com\/wp-content\/uploads\/2017\/10\/eclipse-13-mid-300x215.png 300w, https:\/\/systev.com\/wp-content\/uploads\/2017\/10\/eclipse-13-mid.png 437w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/h3>\n<h3><\/h3>\n<h3>Building another executable<\/h3>\n<p>To build the other executable of <tt>projectB<\/tt>, switch active configuration:<\/p>\n<ul>\n<li><strong>Project \/ Build Configurations \/ Set Active<\/strong><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>After having imported some C projects into Eclipse CDT, I needed, for one of the projects, to build several executables, all of them being defined in the same project. What&#8217;s more, some of the executables had to be linked with object files created by another project. This article describes the configuration I set up to &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/systev.com\/building-several-executables-in-one-eclipse-cdt-project\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Building several executables in one Eclipse CDT project&#8221;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":557,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15],"tags":[],"_links":{"self":[{"href":"https:\/\/systev.com\/wp-json\/wp\/v2\/posts\/563"}],"collection":[{"href":"https:\/\/systev.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/systev.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/systev.com\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/systev.com\/wp-json\/wp\/v2\/comments?post=563"}],"version-history":[{"count":9,"href":"https:\/\/systev.com\/wp-json\/wp\/v2\/posts\/563\/revisions"}],"predecessor-version":[{"id":942,"href":"https:\/\/systev.com\/wp-json\/wp\/v2\/posts\/563\/revisions\/942"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/systev.com\/wp-json\/wp\/v2\/media\/557"}],"wp:attachment":[{"href":"https:\/\/systev.com\/wp-json\/wp\/v2\/media?parent=563"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/systev.com\/wp-json\/wp\/v2\/categories?post=563"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/systev.com\/wp-json\/wp\/v2\/tags?post=563"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}