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 <[email protected]> > > > 2009/2/4 ankit jain <[email protected]>: > > > 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: [email protected] PGP: 2598FFE4 Web: www.nickogden.net
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