23/12/10 16:38
Pitagora
Come le posso installare (secondo me sono già installate)
però, se vado a compilare questo codice:
mi esce come output:
Forse devo linkare qualche cosa nella compilazione?
però, se vado a compilare questo codice:
#include <stdio.h> #include <string.h> #include <curl/curl.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <errno.h> #ifdef WIN32 #include <io.h> #else #include <unistd.h> #endif /* * This example shows an FTP upload, with a rename of the file just after * a successful upload. * * Example based on source code provided by Erick Nuwendam. Thanks! */ #define LOCAL_FILE "/tmp/uploadthis.txt" #define UPLOAD_FILE_AS "while-uploading.txt" #define REMOTE_URL "ftp://example.com/" UPLOAD_FILE_AS #define RENAME_FILE_TO "renamed-and-fine.txt" /* NOTE: if you want this example to work on Windows with libcurl as a DLL, you MUST also provide a read callback with CURLOPT_READFUNCTION. Failing to do so will give you a crash since a DLL may not use the variable's memory when passed in to it from an app like this. */ static size_t read_callback(void *ptr, size_t size, size_t nmemb, void *stream) { /* in real-world cases, this would probably get this data differently as this fread() stuff is exactly what the library already would do by default internally */ size_t retcode = fread(ptr, size, nmemb, stream); fprintf(stderr, "*** We read %d bytes from file\n", retcode); return retcode; } int main(void) { CURL *curl; CURLcode res; FILE *hd_src; struct stat file_info; curl_off_t fsize; struct curl_slist *headerlist=NULL; static const char buf_1 [] = "RNFR " UPLOAD_FILE_AS; static const char buf_2 [] = "RNTO " RENAME_FILE_TO; /* get the file size of the local file */ if(stat(LOCAL_FILE, &file_info)) { printf("Couldnt open '%s': %s\n", LOCAL_FILE, strerror(errno)); return 1; } fsize = (curl_off_t)file_info.st_size; printf("Local file size: %" CURL_FORMAT_CURL_OFF_T " bytes.\n", fsize); /* get a FILE * of the same file */ hd_src = fopen(LOCAL_FILE, "rb"); /* In windows, this will init the winsock stuff */ curl_global_init(CURL_GLOBAL_ALL); /* get a curl handle */ curl = curl_easy_init(); if(curl) { /* build a list of commands to pass to libcurl */ headerlist = curl_slist_append(headerlist, buf_1); headerlist = curl_slist_append(headerlist, buf_2); /* we want to use our own read function */ curl_easy_setopt(curl, CURLOPT_READFUNCTION, read_callback); /* enable uploading */ curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L); /* specify target */ curl_easy_setopt(curl,CURLOPT_URL, REMOTE_URL); /* pass in that last of FTP commands to run after the transfer */ curl_easy_setopt(curl, CURLOPT_POSTQUOTE, headerlist); /* now specify which file to upload */ curl_easy_setopt(curl, CURLOPT_READDATA, hd_src); /* Set the size of the file to upload (optional). If you give a *_LARGE option you MUST make sure that the type of the passed-in argument is a curl_off_t. If you use CURLOPT_INFILESIZE (without _LARGE) you must make sure that to pass in a type 'long' argument. */ curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE, (curl_off_t)fsize); /* Now run off and do what you've been told! */ res = curl_easy_perform(curl); /* clean up the FTP commands list */ curl_slist_free_all (headerlist); /* always cleanup */ curl_easy_cleanup(curl); } fclose(hd_src); /* close the local file */ curl_global_cleanup(); return 0; }
mi esce come output:
pitagora@pitagora:~$ gcc try.c -o try /tmp/ccSWGI9J.o: In function `main': try.c:(.text+0x178): undefined reference to `curl_global_init' try.c:(.text+0x17d): undefined reference to `curl_easy_init' try.c:(.text+0x1a9): undefined reference to `curl_slist_append' try.c:(.text+0x1c7): undefined reference to `curl_slist_append' try.c:(.text+0x1fb): undefined reference to `curl_easy_setopt' try.c:(.text+0x228): undefined reference to `curl_easy_setopt' try.c:(.text+0x255): undefined reference to `curl_easy_setopt' try.c:(.text+0x285): undefined reference to `curl_easy_setopt' try.c:(.text+0x2af): undefined reference to `curl_easy_setopt' /tmp/ccSWGI9J.o:try.c:(.text+0x2de): more undefined references to `curl_easy_setopt' follow /tmp/ccSWGI9J.o: In function `main': try.c:(.text+0x2ed): undefined reference to `curl_easy_perform' try.c:(.text+0x303): undefined reference to `curl_slist_free_all' try.c:(.text+0x312): undefined reference to `curl_easy_cleanup' try.c:(.text+0x326): undefined reference to `curl_global_cleanup'
Forse devo linkare qualche cosa nella compilazione?
Ultima modifica effettuata da Pitagora 23/12/10 16:50
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