{"id":161,"date":"2016-02-01T08:26:18","date_gmt":"2016-02-01T08:26:18","guid":{"rendered":""},"modified":"2016-02-01T08:26:18","modified_gmt":"2016-02-01T08:26:18","slug":"","status":"publish","type":"post","link":"http:\/\/weizn.net\/?p=161","title":{"rendered":"C\/C++\u8c03\u7528Python\u9519\u8bef\u6c47\u603b"},"content":{"rendered":"

\n\t1.Python\/dynload_shlib.c:94: undefined reference to `dlsym’\n<\/p>\n

\n\tto solve the problems such as under Ubuntu:\n<\/p>\n

\n\t—————————————————————————————\n<\/p>\n

\n\tPython\/dynload_shlib.c:94: undefined reference to `dlsym’
\ndynload_shlib.c:130: undefined reference to `dlopen’
\nPython\/dynload_shlib.c:141: undefined reference to `dlsym’
\nPython\/dynload_shlib.c:133: undefined reference to `dlerror’\n<\/p>\n

\n\t—————————————————————————————-\n<\/p>\n

\n\tTo solve this linking problem, run ‘python-config –libs’, then you got the dynamic library list. Find where these libs are, and add their paths to LD_LIBRARY_PATH before ‘scons .\/build\/ARM\/gem5.opt’\n<\/p>\n

\n\tFinally, it works!\n<\/p>\n

\n\t \n<\/p>\n

\n\t2.PyImport_Import() fail:<\/p>\n\n\n

\n
\n\t\t\t\t\t\tImportError<\/span>:<\/span> <\/span><\/span>\/<\/span>usr<\/span>\/<\/span>local<\/span>\/<\/span>lib<\/span>\/<\/span>python2<\/span>.<\/span>7<\/span>\/<\/span>lib<\/span>–<\/span>dynload<\/span>\/<\/span>_socket<\/span>.<\/span>so<\/span>:<\/span> <\/span><\/span>undefined <\/span><\/span>symbol<\/span>:<\/span> <\/span><\/span>PyExc_ValueError<\/span>\n\t\t\t\t\t<\/div>\n<\/p><\/div>\n

\n\t\t\t\t\t\u5982\u679cpython\u5728\u7f16\u8bd1\u5b89\u88c5\u7684\u65f6\u5019\uff0c\u6ca1\u6709\u4f7f\u7528:
\n.\/configure –enable-shared
\n\u90a3\u4e48\u5c31\u4f1a\u9020\u6210\u5728\/usr\/local\/lib\/\u76ee\u5f55\u4e0b\u53ea\u6709libpython2.7.a\u800c\u6ca1\u6709libpython2.7.so\uff0c\u8fd9\u4e2a\u65f6\u5019\u9700\u8981\u7ed9makefile\u52a0\u4e00\u4e2a\u53c2\u6570:
\nC_FLAGS += -export-dynamic\n\t\t\t\t<\/p>\n

\n\t\t\t\t\t\u6216\u8005\u91cd\u65b0\u4f7f\u7528.\/configure –enable-shared\u7f16\u8bd1Python.\n\t\t\t\t<\/p>\n

\n\t\t\t\t\t \n\t\t\t\t<\/p>\n

\n\t\t\t\t\t3.C\/C++\u591a\u7ebf\u7a0b\u8c03\u7528Python\n\t\t\t\t<\/p>\n

\n\t\t\t\t\tPython\u4e2d\u6709\u4e00\u4e2aGIL\uff0c\u5bfc\u81f4Python\u7ebf\u7a0b\u6548\u7387\u5f88\u4f4e\uff0c\u6b64\u5916\u82e5\u5728C\/C++\u4e2d\u521b\u5efa\u7ebf\u7a0b\u6765\u8c03\u7528Python\u89e3\u91ca\u5668\uff0c\u4f1a\u9020\u6210\u6bb5\u9519\u8bef\u3002\n\t\t\t\t<\/p>\n

\n\t\t\t\t\t\u89e3\u51b3\u65b9\u5f0f\uff1a\n\t\t\t\t<\/p>\n

\n\t\t\t\t\t\/\/\u4e3b\u7ebf\u7a0b\u4e2d\n\t\t\t\t<\/p>\n

\n\t\t\t\t\tPy_Initialize();\n\t\t\t\t<\/p>\n

\n\t\t\t\t\tPyEval_InitThreads();
\nPyEval_ReleaseLock();   \/\/\u542f\u52a8\u5b50\u7ebf\u7a0b\u524d\u6267\u884c\uff0c\u4e3a\u4e86\u91ca\u653ePyEval_InitThreads\u83b7\u5f97\u7684\u5168\u5c40\u9501\uff0c\u5426\u5219\u5b50\u7ebf\u7a0b\u53ef\u80fd\u65e0\u6cd5\u83b7\u53d6\u5230\u5168\u5c40\u9501\u3002\n\t\t\t\t<\/p>\n

\n\t\t\t\t\t \n\t\t\t\t<\/p>\n

\n\t\t\t\t\t\/\/\u5b50\u7ebf\u7a0b\u4e2d\n\t\t\t\t<\/p>\n

\n\t\t\t\t\tPyGILState_STATE state = PyGILState_Ensure();\n\t\t\t\t<\/p>\n

\n\t\t\t\t\t…..    \/\/\u8c03\u7528Python\u4ee3\u7801\n\t\t\t\t<\/p>\n

\n\t\t\t\t\tPyGILState_Release(state);\n\t\t\t\t<\/p>\n

\n\t\t\t\t\t \n\t\t\t\t<\/p>\n

\n\t\t\t\t\t\/\/\u4e3b\u7ebf\u7a0b\u4e2d\n\t\t\t\t<\/p>\n

\/\/\u4fdd\u8bc1\u5b50\u7ebf\u7a0b\u8c03\u7528\u90fd\u7ed3\u675f\u540e
\nPyGILState_Ensure();
\nPy_Finalize();
\n\/\/\u4e4b\u540e\u4e0d\u80fd\u518d\u8c03\u7528\u4efb\u4f55Python\u7684API<\/p>\n

\n\t\t\t\t\t \n\t\t\t\t<\/p>\n<\/td>\n<\/tr>\n","protected":false},"excerpt":{"rendered":"

\n\tto solve the problems such as under Ubuntu:\n<\/p>\n

\n\t—————————————————————————————\n<\/p>\n

\n\tPython\/dynload_shlib.c:94: undefined reference to `dlsym…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[334],"tags":[],"class_list":["post-161","post","type-post","status-publish","format-standard","hentry"],"yoast_head":"\nC\/C++\u8c03\u7528Python\u9519\u8bef\u6c47\u603b - Wayne's Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/weizn.net\/?p=161\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C\/C++\u8c03\u7528Python\u9519\u8bef\u6c47\u603b - Wayne's Blog\" \/>\n<meta property=\"og:description\" content=\"to solve the problems such as under Ubuntu: --------------------------------------------------------------------------------------- Python\/dynload_shlib.c:94: undefined reference to `dlsym...\" \/>\n<meta property=\"og:url\" content=\"http:\/\/weizn.net\/?p=161\" \/>\n<meta property=\"og:site_name\" content=\"Wayne's Blog\" \/>\n<meta property=\"article:published_time\" content=\"2016-02-01T08:26:18+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"zinan\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebSite\",\"@id\":\"http:\/\/weizn.net\/#website\",\"url\":\"http:\/\/weizn.net\/\",\"name\":\"Wayne's Blog\",\"description\":\"\",\"publisher\":{\"@id\":\"http:\/\/weizn.net\/#\/schema\/person\/e88bc12c590502d8b6249326f960b264\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"http:\/\/weizn.net\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"zh-Hans\"},{\"@type\":\"WebPage\",\"@id\":\"http:\/\/weizn.net\/?p=161#webpage\",\"url\":\"http:\/\/weizn.net\/?p=161\",\"name\":\"C\/C++\\u8c03\\u7528Python\\u9519\\u8bef\\u6c47\\u603b - 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