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 > > > 2009/2/4 ankit jain : > > > 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 Eric Noulard > 2009/2/4 ankit jain : > > > > 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
Re: [CMake] Fwd: Fwd: Is it necessary to link a executable file?
2009/2/4 ankit jain : > > 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
