Re: [CMake] Fwd: Fwd: Is it necessary to link a executable file?
That's because a library doesn't need a main() function. It's just a set of functions that may be called by applications and is never executed by itself, however an executable needs a point of entry and therefore needs a main() function. On Wednesday 04 February 2009 10:51:31 ankit jain wrote: 2009/2/4 Eric Noulard eric.noul...@gmail.com 2009/2/4 ankit jain ankitgu...@gmail.com: The CMakeLists iam using contains: PROJECT(hello) ADD_EXECUTABLE(hello h1.C) Error iam getting is: Linking CXX executable hello /usr/lib/gcc-lib/i386-redhat-linux/3.2.3/../../../crt1.o(.text+0x18): In function `_start': : undefined reference to `main' This is not a CMake error this is a C++ error your source file is lacking the main() function thus the compiler cannot produce an executable. I bet that if you search for undefined reference to `main' on the Web you'll find the answer to such question. -- Erk But if i replace ADD_EXECUTABLE by ADD_LIBRARY there is no error and a library get successfully built. AJ -- Nick Ogden Email: n...@nickogden.net PGP: 2598FFE4 Web: www.nickogden.net signature.asc Description: This is a digitally signed message part. ___ CMake mailing list CMake@cmake.org http://www.cmake.org/mailman/listinfo/cmake
Re: [CMake] Fwd: Fwd: Is it necessary to link a executable file?
2009/2/4 ankit jain ankitgu...@gmail.com: The CMakeLists iam using contains: PROJECT(hello) ADD_EXECUTABLE(hello h1.C) Error iam getting is: Linking CXX executable hello /usr/lib/gcc-lib/i386-redhat-linux/3.2.3/../../../crt1.o(.text+0x18): In function `_start': : undefined reference to `main' This is not a CMake error this is a C++ error your source file is lacking the main() function thus the compiler cannot produce an executable. I bet that if you search for undefined reference to `main' on the Web you'll find the answer to such question. -- Erk ___ CMake mailing list CMake@cmake.org http://www.cmake.org/mailman/listinfo/cmake
Re: [CMake] Fwd: Fwd: Is it necessary to link a executable file?
2009/2/4 Eric Noulard eric.noul...@gmail.com 2009/2/4 ankit jain ankitgu...@gmail.com: The CMakeLists iam using contains: PROJECT(hello) ADD_EXECUTABLE(hello h1.C) Error iam getting is: Linking CXX executable hello /usr/lib/gcc-lib/i386-redhat-linux/3.2.3/../../../crt1.o(.text+0x18): In function `_start': : undefined reference to `main' This is not a CMake error this is a C++ error your source file is lacking the main() function thus the compiler cannot produce an executable. I bet that if you search for undefined reference to `main' on the Web you'll find the answer to such question. -- Erk But if i replace ADD_EXECUTABLE by ADD_LIBRARY there is no error and a library get successfully built. AJ ___ CMake mailing list CMake@cmake.org http://www.cmake.org/mailman/listinfo/cmake
