Why can\'t clang with libc in C 0x mode link this boost::program_options example?

Linking Boost::Program_Options with Clang and Libc in C 0x Mode

Q: Why can't clang with libc in C 0x mode link this boost::program_options example?

The reported issue arises when attempting to compile and link a sample boost::program_options example with clang and libc in C 0x mode. The compilation succeeds, but linking encounters several undefined symbols leading to a linker error.

A: Rebuilding Boost with Clang and Libc

To resolve this issue, it is necessary to rebuild the boost libraries using clang with the libc standard library. The following steps outline the process:

1. Uninstall existing boost: Remove any previously installed Boost libraries to avoid conflicts.
2. Download Boost source: Obtain the source code for a recent version of Boost from the official website (e.g., boost.org).
3. Configure Boost: Execute the following command to configure Boost for building with clang and libc :

./b2 toolset=clangcxx --with-libraries=program_options \
  --with-cflags="-stdlib=libc++" --with-ldflags="-stdlib=libc++"

4. Build and Install Boost: Use the following command to build and install the Boost libraries:

./b2 install

After rebuilding Boost with libc , recompiling and linking the boost::program_options example using clang with the libc standard library should succeed without the previously encountered undefined symbol errors.

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