{"id":1712,"date":"2021-11-21T20:48:51","date_gmt":"2021-11-21T12:48:51","guid":{"rendered":"https:\/\/ykyi.net\/?p=1712"},"modified":"2021-11-21T20:48:51","modified_gmt":"2021-11-21T12:48:51","slug":"%e5%a6%82%e4%bd%95%e7%9f%a5%e9%81%93gcc-g-%e7%9a%84%e9%bb%98%e8%ae%a4c%e7%89%88%e6%9c%ac","status":"publish","type":"post","link":"https:\/\/ykyi.net\/?p=1712","title":{"rendered":"\u5982\u4f55\u77e5\u9053gcc\/g++ \u7684\u9ed8\u8ba4C++\u7248\u672c"},"content":{"rendered":"<p>C++\u5728C++ 11\u4e4b\u540e\u5728\u4fdd\u6301\u5411\u540e\u517c\u5bb9\u7684\u60c5\u51b5\u4e0b\uff0c\u8bed\u6cd5\u589e\u5f3a\u4e86\u975e\u5e38\u591a\uff0c\u53d8\u5316\u5f88\u5927\u3002\u5f97\u76ca\u4e8eMove\u8bed\u4e49\uff0c\u548c\u4e00\u4e9b\u6807\u51c6\u5e93\u7684\u6539\u8fdb\uff08\u5982std::list\u7684size()\u51fd\u6570\u5728C++11\u4e4b\u524d\u662fO(n)\u7684\u590d\u6742\u5ea6\uff0c\u4eceC++11\u5f00\u59cb\u53d8\u6210\u5e38\u6570\u590d\u6742\u5ea6\uff09\u3002\u4e00\u4e9b\u65e7C++\u4ee3\u7801\u5373\u4f7f\u4ec0\u4e48\u6539\u52a8\u4e5f\u4e0d\u505a\uff0c\u53ea\u9700\u8981\u5728\u65b0\u7684C++\u6807\u51c6\u4e0b\u7f16\u8bd1\uff0c\u4e5f\u80fd\u83b7\u5f97\u6027\u80fd\u63d0\u5347\u3002\u4e00\u822c\u8981\u7ed9g++\u5f00\u542fC++11\u9700\u8981\u7528 -std=c++11\uff0c\u5f00\u542fC++17\u5219\u662f -std=c++17\u3002\u90a3\u4e48\uff0c\u5982\u679c\u4e0d\u6dfb\u52a0\u8fd9\u4e9b\u9009\u9879\uff0cgcc\/g++\u9ed8\u8ba4\u4f7f\u7528\u7684C++\u7248\u672c\u53f7\u662f\u4ec0\u4e48\u5462\uff1f<\/p>\n<p>\u5982\u679c\u4f60\u7684gcc\/g++\u7248\u672c\u53f7\u5927\u4e8e4.7\u7684\u8bdd\uff0c\u53ef\u4ee5\u7528\u5982\u4e0b\u547d\u4ee4\u83b7\u5f97\u9ed8\u8ba4c++\u7248\u672c\u3002<\/p>\n<pre><code class=\"language-bash \">kamus@shyyp.net:~<span class=\"katex math inline\">g++ --version | head -1\ng++ (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0\nkamus@shyyp.net:~<\/span> g++ -dM -E -x c++  \/dev\/null | grep -F __cplusplus\n#define __cplusplus 201402L\nkamus@shyyp.net:~$ gcc -dM -E -x c++  \/dev\/null | grep -F __cplusplus    \uff03\u5176\u5b9e\u7528gcc\u4e5f\u53ef\u4ee5\n#define __cplusplus 201402L\n<\/code><\/pre>\n<p>\u5982\u4e0a\u6240\u793a\uff0c\u6211\u7684g++\u7248\u672c\u662f9.3.0\u3002\u5b83\u7684\u9ed8\u8ba4C\uff0b\uff0b\u7248\u672c\u662fC\uff0b\uff0b14\u3002<br \/>\n\u8fd9\u662f\u6211\u5bb6\u7528\u7684\u7535\u8111\u3002\u6211\u5728\u516c\u53f8\u7684\u673a\u5668\u4e0a\u8fd0\u884c\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"language-bash \">kamuszhou@centos ~ <span class=\"katex math inline\">g++ --version | head -1\ng++ (Ubuntu 4.8.4-2ubuntu1~14.04.3) 4.8.4\nkamuszhou@centos~<\/span> g++ -dM -E -x c++  \/dev\/null | grep -F __cplusplus\n#define __cplusplus 199711L\n<\/code><\/pre>\n<p>\u5982\u4e0a\u6240\u793a\uff0c\u8001\u7248\u7684g++ 4.8.4\u7528\u7684\u9ed8\u8ba4C++\u7248\u672c\u8fd8\u662fc++98<\/p>\n<p>\u518d\u89e3\u91ca\u4e00\u4e0b\u8fd9\u91cc\u7528\u5230\u7684gcc\/g++\u7684\u9009\u9879, \u8fd9\u91cc-dM\u7684\u610f\u601d\u662f\uff1a<\/p>\n<blockquote><p>\n  Instead of the normal output, generate a list of \u2018#define\u2019 directives for all the macros defined during the execution of the preprocessor, including predefined macros. This gives you a way of finding out what is predefined in your version of the preprocessor.\n<\/p><\/blockquote>\n<p>\u5bf9\u6240\u6709\u5b8f\uff0c\u5305\u62ec\u9884\u5b9a\u4e49\u7684\u5b8f\uff0c\u5728\u9884\u7f16\u8bd1\u9636\u6bb5\u8f93\u51fa\u4e00\u7cfb\u5217\u7684#define\u3002<\/p>\n<p>-E\u7684\u610f\u601d\u662f\uff0c\u505a\u5b8c\u9884\u7f16\u8bd1\u540e\u5373\u9000\u51fa\uff0c\u4e0d\u6267\u884c\u771f\u6b63\u7684\u7f16\u8bd1\u3002<br \/>\n-x c++\u8868\u793a\u4f7f\u7528C++\u8bed\u8a00\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>C++\u5728C++ 11\u4e4b\u540e\u5728\u4fdd\u6301\u5411\u540e\u517c\u5bb9\u7684\u60c5\u51b5\u4e0b\uff0c\u8bed\u6cd5\u589e\u5f3a\u4e86\u975e\u5e38\u591a\uff0c\u53d8\u5316\u5f88\u5927\u3002\u5f97\u76ca\u4e8eMove\u8bed\u4e49\uff0c\u548c\u4e00\u4e9b\u6807\u51c6\u5e93\u7684\u6539\u8fdb\uff08\u5982std::list\u7684size()\u51fd\u6570\u5728C++11\u4e4b\u524d\u662fO(n)\u7684\u590d\u6742\u5ea6\uff0c\u4eceC++11\u5f00\u59cb\u53d8\u6210\u5e38\u6570\u590d\u6742\u5ea6\uff09\u3002\u4e00\u4e9b\u65e7C++\u4ee3\u7801\u5373\u4f7f\u4ec0\u4e48\u6539\u52a8\u4e5f\u4e0d\u505a\uff0c\u53ea\u9700\u8981\u5728\u65b0\u7684C++\u6807\u51c6\u4e0b\u7f16\u8bd1\uff0c\u4e5f\u80fd\u83b7\u5f97\u6027\u80fd\u63d0\u5347\u3002\u4e00\u822c\u8981\u7ed9g++\u5f00\u542fC++11\u9700\u8981\u7528 -std=c++11\uff0c\u5f00\u542fC++17\u5219\u662f -std=c++17\u3002\u90a3\u4e48\uff0c\u5982\u679c\u4e0d\u6dfb\u52a0\u8fd9\u4e9b\u9009\u9879\uff0cgcc\/g++\u9ed8\u8ba4\u4f7f\u7528\u7684C++\u7248\u672c\u53f7\u662f\u4ec0\u4e48\u5462\uff1f \u5982\u679c\u4f60\u7684gcc\/g++\u7248\u672c\u53f7\u5927\u4e8e4.7\u7684\u8bdd\uff0c\u53ef\u4ee5\u7528\u5982\u4e0b\u547d\u4ee4\u83b7\u5f97\u9ed8\u8ba4c++\u7248\u672c\u3002 kamus@shyyp.net:~g++ &#8211;version | head -1 g++ (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0 kamus@shyyp.net:~ g++ -dM -E -x c++ \/dev\/null | grep -F __cplusplus #define __cplusplus 201402L kamus@shyyp.net:~$ gcc -dM -E -x c++ \/dev\/null | grep -F __cplusplus \uff03\u5176\u5b9e\u7528gcc\u4e5f\u53ef\u4ee5 #define __cplusplus 201402L \u5982\u4e0a\u6240\u793a\uff0c\u6211\u7684g++\u7248\u672c\u662f9.3.0\u3002\u5b83\u7684\u9ed8\u8ba4C\uff0b\uff0b\u7248\u672c\u662fC\uff0b\uff0b14\u3002 \u8fd9\u662f\u6211\u5bb6\u7528\u7684\u7535\u8111\u3002\u6211\u5728\u516c\u53f8\u7684\u673a\u5668\u4e0a\u8fd0\u884c\u7ed3\u679c\u5982\u4e0b\uff1a kamuszhou@centos ~ g++ &#8211;version | head -1 g++ (Ubuntu 4.8.4-2ubuntu1~14.04.3) &hellip; <a href=\"https:\/\/ykyi.net\/?p=1712\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;\u5982\u4f55\u77e5\u9053gcc\/g++ \u7684\u9ed8\u8ba4C++\u7248\u672c&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[20],"class_list":["post-1712","post","type-post","status-publish","format-standard","hentry","category-tech_articles","tag-c"],"_links":{"self":[{"href":"https:\/\/ykyi.net\/index.php?rest_route=\/wp\/v2\/posts\/1712","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ykyi.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ykyi.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ykyi.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ykyi.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1712"}],"version-history":[{"count":0,"href":"https:\/\/ykyi.net\/index.php?rest_route=\/wp\/v2\/posts\/1712\/revisions"}],"wp:attachment":[{"href":"https:\/\/ykyi.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1712"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ykyi.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1712"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ykyi.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1712"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}