{"id":3802,"date":"2015-06-24T10:43:57","date_gmt":"2015-06-24T10:43:57","guid":{"rendered":"http:\/\/blog.bachi.net\/?p=3802"},"modified":"2015-06-24T10:43:57","modified_gmt":"2015-06-24T10:43:57","slug":"c-macro-test-with-gcc","status":"publish","type":"post","link":"https:\/\/blog.bachi.net\/?p=3802","title":{"rendered":"C Macro Test with GCC"},"content":{"rendered":"<pre class=\"brush: plain; title: ; notranslate\" title=\"\">\r\n$ echo '__FreeBSD__ ' | gcc -E -\r\n# 1 &quot;&lt;stdin&gt;&quot;\r\n# 1 &quot;&lt;built-in&gt;&quot;\r\n# 1 &quot;&lt;command-line&gt;&quot;\r\n# 1 &quot;\/usr\/include\/stdc-predef.h&quot; 1 3 4\r\n# 1 &quot;&lt;command-line&gt;&quot; 2\r\n# 1 &quot;&lt;stdin&gt;&quot;\r\n__FreeBSD__    &lt;== no replacement --&gt; no macro defined\r\n\r\n$ echo '__linux__ ' | gcc -E -\r\n# 1 &quot;&lt;stdin&gt;&quot;\r\n# 1 &quot;&lt;built-in&gt;&quot;\r\n# 1 &quot;&lt;command-line&gt;&quot;\r\n# 1 &quot;\/usr\/include\/stdc-predef.h&quot; 1 3 4\r\n# 1 &quot;&lt;command-line&gt;&quot; 2\r\n# 1 &quot;&lt;stdin&gt;&quot;\r\n1    &lt;== replacement --&gt; macro defined\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>$ echo &#8216;__FreeBSD__ &#8216; | gcc -E &#8211; # 1 &quot;&lt;stdin&gt;&quot; # 1 &quot;&lt;built-in&gt;&quot; # 1 &quot;&lt;command-line&gt;&quot; # 1 &quot;\/usr\/include\/stdc-predef.h&quot; 1 3 4 # 1 &quot;&lt;command-line&gt;&quot; 2 # 1 &quot;&lt;stdin&gt;&quot; __FreeBSD__ &lt;== no replacement &#8211;&gt; no macro defined $ echo &#8216;__linux__ &#8216; | gcc -E &#8211; # 1 &quot;&lt;stdin&gt;&quot; # 1 &quot;&lt;built-in&gt;&quot; # 1 &quot;&lt;command-line&gt;&quot; [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3802","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/blog.bachi.net\/index.php?rest_route=\/wp\/v2\/posts\/3802","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.bachi.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.bachi.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.bachi.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.bachi.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3802"}],"version-history":[{"count":1,"href":"https:\/\/blog.bachi.net\/index.php?rest_route=\/wp\/v2\/posts\/3802\/revisions"}],"predecessor-version":[{"id":3803,"href":"https:\/\/blog.bachi.net\/index.php?rest_route=\/wp\/v2\/posts\/3802\/revisions\/3803"}],"wp:attachment":[{"href":"https:\/\/blog.bachi.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3802"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.bachi.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3802"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.bachi.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3802"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}