-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Hi, On Fri, Jan 16, 2015 at 08:12:15PM -0700, Ashoordin wrote: > Hello friends, > I am new with Fedora 21 but I am trying to learn C++ as well. So, in my > compilation command of First of all, this might be the wrong list for this, as this list if for Fedora Infrastructure stuff. > "g++ -Wall `root-config --cflags --ldflags --libs` example.cpp" I am > receiving the error message > "/usr/lib/gcc/i686-redhat-linux/4.9.2/../../../crt1.o: In function `_start': > (.text+0x18): undefined reference to `main' > collect2: error: ld returned 1 exit status" This means you forgot to define a function called main in example.cpp: https://wwwx.cs.unc.edu/~sparkst/howto/cpp_main.php > After changing the compilation command to > "g++ -ansi -Wall -I /usr/include -c example.cpp" > I no longer receive the error. > However during linking command > "g++ -L /usr/lib/../../../ crt1.o *.o -lgsl -lgslcblas -lm" > I receive the following error message > "g++: error: crt1.o: No such file or directory" > But, I know for sure that there is such a file. So, what could be wrong? Note you have a space between /usr/lib/../../../ and crt1.o, so it's searching for crt1.o in the current directory. > > Thanks for everyone's help, > Ashur - -- With kind regards, Patrick Uiterwijk -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBCgAGBQJUvMVlAAoJEIZXmA2atR5QV+IP/1ECQr8bl/JA5oXWsR0VDX9r R5B5mOazYNTIFQeVin1GIARgyJsrae5rEv30vPXvGf/pzuWeLwkB3pvou0hl60DU cJnViO7wUvQjlFJ6Af4aMXHrvPzqnz8/sVGq/p/6JUn/yP5hoT45Rt3r7sx6C20n PlfIH0IxPMyq1VHvyWJwNAHPa6nuo4GS+nCJcL835qgqAiBGtSKA+7uPJIShD9Re mR+8xhOvLlVLxcjXL9B6sJp/unKiu6NJGSb1/boYMQu2dBb/ziIrAJ8I0NUbK206 tVAVo1KV9c0HZPybmTEmAiKhXz1NZPiPGYBjddGMCvatQrh8Gpj0FyCIc1phGqmu RKIEvf/xzapItQB0WhzX8s5IzrE0kiOLG/vGIWQ6QIb2pTLa+y1F8MAV8rpepowR 4drwd1WKRAjSPduPHqJCbu50n5RWS2Iqub1NK1AIMjTYTpe686AH9W+NSkhlEuZZ Miqn/TXHiYi2eevfuhDoMjxyFpiqWebikADC7XM0vBM8gCMIELJYvFWbhGAHFdT3 NTB+ZZaEQiVkMkg77aWRoXVIWkCrCniS4OFdfbr4RI9KY3NI8SLtbnwQBGJbK2PC 3GhE19c96t9nV2Y2BUne20wVhkF9i5wXBt5orclWUuguw1Fzc/YC9Vs3S/nxSzHA aHMbqhRVeeSbuj6r1f74 =SkLU -----END PGP SIGNATURE----- _______________________________________________ infrastructure mailing list infrastructure@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/infrastructure
