The following issue has been SUBMITTED. ====================================================================== http://public.kitware.com/Bug/view.php?id=13606 ====================================================================== Reported By: Mika Fischer Assigned To: ====================================================================== Project: CMake Issue ID: 13606 Category: CMake Reproducibility: always Severity: major Priority: normal Status: new ====================================================================== Date Submitted: 2012-10-25 08:19 EDT Last Modified: 2012-10-25 08:19 EDT ====================================================================== Summary: Eclipse Generator wants to run c++ to determine system include paths before c++ compiler is determined by cmake Description: I added some debugging output to CMakeExtraGeneratorDetermineCompilerMacrosAndIncludeDirs.cmake and get the following output from cmake -G "Eclipse CDT4 - Ninja" <srcdir>:
------------------------------------------------------------------------- -- The C compiler identification is GNU 4.7.2 -- Could not determine Eclipse version, assuming at least 3.6 (Helios). Adjust CMAKE_ECLIPSE_VERSION if this is wrong. CMAKE_C_COMPILER: "/usr/bin/gcc" CMAKE_C_COMPILER_ID: "GNU" Running c system include detection: /usr/bin/gcc -v -E -x c -dD dummy CMAKE_CXX_COMPILER: "" CMAKE_CXX_COMPILER_ID: "" -- Check for working C compiler using: Ninja -- Check for working C compiler using: Ninja -- works -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done CMAKE_CXX_COMPILER set to "/usr/bin/c++" -- The CXX compiler identification is GNU 4.7.2 CMAKE_CXX_COMPILER_ID set to "GNU" -- Check for working CXX compiler using: Ninja -- Check for working CXX compiler using: Ninja -- works -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done ------------------------------------------------------------------------- So somehow the Eclipse generator wants to determine the include paths of the C++ compilers before it's even detected by CMake. This works for C, since CMAKE_C_COMPILER and CMAKE_C_COMPILER_ID are set at that point (see debug output shown above). However this is not the case for CMAKE_CXX_COMPILER and CMAKE_CXX_COMPILER_ID. Therefore the generator can't run the C++ compiler and thus the project file misses the system includes for C++, breaking things everywhere... Steps to Reproduce: Generate an Eclipse project file of a C++ project. Additional Information: I use the following as aworkaround: cmake -D CMAKE_CXX_COMPILER_ID:STRING=GNU -D CMAKE_CXX_COMPILER:FILEPATH=/usr/bin/c++ -G "Eclipse CDT4 - Ninja" ------------------------------------------------------------------------- -- The C compiler identification is GNU 4.7.2 -- Could not determine Eclipse version, assuming at least 3.6 (Helios). Adjust CMAKE_ECLIPSE_VERSION if this is wrong. CMAKE_C_COMPILER: "/usr/bin/gcc" CMAKE_C_COMPILER_ID: "GNU" Running c system include detection: /usr/bin/gcc -v -E -x c -dD dummy CMAKE_CXX_COMPILER: "/usr/bin/c++" CMAKE_CXX_COMPILER_ID: "GNU" Running c++ system include detection: /usr/bin/c++ -v -E -x c++ -dD dummy -- Check for working C compiler using: Ninja -- Check for working C compiler using: Ninja -- works -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done CMAKE_CXX_COMPILER set to "/usr/bin/c++" -- The CXX compiler identification is GNU CMAKE_CXX_COMPILER_ID set to "GNU" -- Check for working CXX compiler using: Ninja -- Check for working CXX compiler using: Ninja -- works -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done ------------------------------------------------------------------------- ====================================================================== Issue History Date Modified Username Field Change ====================================================================== 2012-10-25 08:19 Mika Fischer New Issue ====================================================================== -- Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Follow this link to subscribe/unsubscribe: http://public.kitware.com/cgi-bin/mailman/listinfo/cmake-developers
