Ubuntu – Eclipse can’t find index libraries of GCC or G++

Apply this patch, and configure with --enable-multiarch (not to be confused with multilib):

• http://gcc.gnu.org/ml/gcc-patches/2011-08/msg01674.html

^{(That supersedes this earlier patch.)}

If you had the same issue I did, I suspect that your project builds but code-completion / code highlighting fails? I've just found some notes that may be useful. Here's what I did:

• Project->Properties

• C/C++ General

• Paths and Symbols

• select the appropriate language

• Click "Add" and add the compiler-version specific directories

For language 'GNU C++' I added:

  /usr/include
  /usr/include/c++/4.6
  /usr/include/c++/4.6/bits
  /usr/include/i386-linux-gnu
  /usr/include/i386-linux-gnu/bits
  /usr/include/c++/4.6/debug
  /usr/include/c++/4.6/i686-linux-gnu
  /usr/include/c++/4.6/i686-linux-gnu/bits

For "GNU C" I added:

  /usr/include
  /usr/include/i386-linux-gnu
  /usr/include/i386-linux-gnu/bits

TBH, I don't think all the directories above are actually required (you could probably remove the 'bits' directories) but the list above worked for me at the time.

I am now using Eclipse Indigo (version 3.7.2) from eclipse.org and it automatically finds and adds the correct include directories. The list is different for me:

/usr/include/c++/4.6
/usr/include/c++/4.6/i686-linux-gnu
/usr/include/c++/4.6/backward
/usr/lib/gcc/i686-linux-gnu/4.6/include
/usr/local/include
/usr/lib/gcc/i686-linux-gnu/4.6/include-fixed
/usr/include/i386-linux-gnu
/usr/include

Clearly, only add the include directories that actually exist on your system ;-)