CDT does not find Cygwin gcc include files correctly, even after stating include paths
cygwin, eclipse-cdt
Solution
Instead of changing your project-specific changes, you have to make Eclipse 'forget' and re-discover your compiler's include directories. Do this via Windows | Preferences | C/C++ | Build | Settings ; you need to clear the 'Discovery' entries for gcc.
see also this question.
Problem
I have a rather embarrasing question, as this problem was no issue on a linux machine and on my Windows XP machine. But now, after having finally switched to Windows 7 64bit, I ran into the basic problem of making Eclipse find my C++ include files... My setting: I am running Windows 7 64bit. I have installed cygwin to "C:\Program Files\cygwin" and Eclipse Juno 64bit to "C:\Program Files\eclipse". My problem: I created a basic "Hello World" C++ Makefile project with Cygwin toolchain. Compilation works without problems, but Eclipse still complains that it cannot find the include to "iostream". What I tried: In Project Properties -> C/C++ General -> Paths and Symbols -> Includes, I set the Include directory for GNU C and GNU C++ to ``` C:\Program Files\cygwin\lib\gcc\i686-pc-cygwin\4.5.3\include ``` which contains the iostream include in a subdirectory. This didn't work Then I tried the exact directory ``` C:\Program Files\cygwin\lib\gcc\i686-pc-cygwin\4.5.3\include\C++ ``` containing iostream. This time, the include was found, but even after rebuilding the index, Eclipse still coulnd't resolve std, cout and endl. Then I tried the include directory of the 3.x version of gcc ``` C:\Program Files\cygwin\lib\gcc\i686-pc-cygwin\3.4.4\include\C++ ``` and it worked. Unfortunately, I require the 4.x version of gcc, so this is no permanent solution for me. My Question: How I can I resolve this problem and make Eclipse find the gcc 4.x include directories and use them correctly?