Re: [CMake] Changing compiler
Sounds like you must have gotten errors when you built gcc... Pore through the log of what happened during the gcc build maybe? Are you building gcc from source, or using some package manager to build it for you? (MacPorts, something else?) FYI - there was no problem all along with the build (see paragraph below): The executable 'gcc' never exists in the build directory even if the build is successful. It is called 'xgcc'. 'xgcc' will finally be renamed to 'gcc' as part of 'make install'. The reason for this naming convention is listed in the source file gcc/Makefile.in: # We call this executable `xgcc' rather than `gcc' # to avoid confusion if the current directory is in the path # and CC is `gcc'. It is renamed to `gcc' when it is installed. BR, Andi However, I'm still having trouble using it to build ITK. I tried two things: 1) I run ccmake ~/src/ITK Then before I configure, I change the CMAKE_C/CXX_COMPILER variables. Then when I configure I get: You have changed variables that require your cache to be deleted. Configure will be re-run and you may have to reset some variables. The following variables have changed: CMAKE_C_COMPILER= /home/doriad/bin/gcc/gcc/xgcc CMAKE_CXX_COMPILER= /home/doriad/bin/gcc/gcc/g++ CMake Error at /usr/share/cmake/Modules/CMakeTestCCompiler.cmake:52 (MESSAGE): The C compiler /home/doriad/bin/gcc/gcc/xgcc is not able to compile a simple test program. It fails with the following output: Change Dir: /home/doriad/bin/ITK_newgcc/CMakeFiles/CMakeTmp 2) I run: ccmake ../../src/ITK -DCMAKE_CXX_COMPILER=/home/doriad/bin/gcc/gcc/g++ -DCMAKE_C_COMPILER=/home/doriad/bin/gcc/gcc/xgcc CMake Error at /usr/share/cmake/Modules/CMakeTestCCompiler.cmake:52 (MESSAGE): The C compiler /home/doriad/bin/gcc/gcc/xgcc is not able to compile a simple test program. It fails with the following output: Change Dir: /home/doriad/bin/ITK_newgcc/CMakeFiles/CMakeTmp Run Build Command:/usr/bin/gmake cmTryCompileExec/fast /usr/bin/gmake -f CMakeFiles/cmTryCompileExec.dir/build.make CMakeFiles/cmTryCompileExec.dir/build gmake[1]: Entering directory `/home/doriad/bin/ITK_newgcc/CMakeFiles/CMakeTmp' Any thoughts? Thanks, David ___ 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://www.cmake.org/mailman/listinfo/cmake
Re: [CMake] Changing compiler
On Thu, Apr 21, 2011 at 7:47 AM, David Doria daviddo...@gmail.com wrote: Sounds like you must have gotten errors when you built gcc... Pore through the log of what happened during the gcc build maybe? Are you building gcc from source, or using some package manager to build it for you? (MacPorts, something else?) FYI - there was no problem all along with the build (see paragraph below): The executable 'gcc' never exists in the build directory even if the build is successful. It is called 'xgcc'. 'xgcc' will finally be renamed to 'gcc' as part of 'make install'. The reason for this naming convention is listed in the source file gcc/Makefile.in: # We call this executable `xgcc' rather than `gcc' # to avoid confusion if the current directory is in the path # and CC is `gcc'. It is renamed to `gcc' when it is installed. BR, Andi However, I'm still having trouble using it to build ITK. I tried two things: 1) I run ccmake ~/src/ITK Then before I configure, I change the CMAKE_C/CXX_COMPILER variables. Then when I configure I get: You have changed variables that require your cache to be deleted. Configure will be re-run and you may have to reset some variables. The following variables have changed: CMAKE_C_COMPILER= /home/doriad/bin/gcc/gcc/xgcc CMAKE_CXX_COMPILER= /home/doriad/bin/gcc/gcc/g++ CMake Error at /usr/share/cmake/Modules/CMakeTestCCompiler.cmake:52 (MESSAGE): The C compiler /home/doriad/bin/gcc/gcc/xgcc is not able to compile a simple test program. It fails with the following output: Change Dir: /home/doriad/bin/ITK_newgcc/CMakeFiles/CMakeTmp 2) I run: ccmake ../../src/ITK -DCMAKE_CXX_COMPILER=/home/doriad/bin/gcc/gcc/g++ -DCMAKE_C_COMPILER=/home/doriad/bin/gcc/gcc/xgcc CMake Error at /usr/share/cmake/Modules/CMakeTestCCompiler.cmake:52 (MESSAGE): The C compiler /home/doriad/bin/gcc/gcc/xgcc is not able to compile a simple test program. It fails with the following output: Change Dir: /home/doriad/bin/ITK_newgcc/CMakeFiles/CMakeTmp Run Build Command:/usr/bin/gmake cmTryCompileExec/fast /usr/bin/gmake -f CMakeFiles/cmTryCompileExec.dir/build.make CMakeFiles/cmTryCompileExec.dir/build gmake[1]: Entering directory `/home/doriad/bin/ITK_newgcc/CMakeFiles/CMakeTmp' Any thoughts? Thanks, David Can gcc run from its build tree? Or does it need to be installed to work? I would try using a prefix and installing it somewhere other than its build tree. ___ 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://www.cmake.org/mailman/listinfo/cmake
Re: [CMake] Changing compiler
If you are setting the CXX compiler, you should also probably be setting the C compiler. I always use environment variables to do this: export CC=/home/doriad/src/gcc-4.5.2/bin/gcc/gcc export CXX=/home/doriad/src/gcc-4.5.2/bin/gcc/g++ ccmake ../../src/ITK If that still doesn't work, then inspect the contents of the file CMakeFiles/CMakeError.log to see what the actual errors are, and post them here. (CMakeFiles/CMakeOutput.log may also have relevant results in it...) HTH, David C. On Wed, Apr 20, 2011 at 7:39 AM, David Doria daviddo...@gmail.com wrote: I am trying to build ITK with a non-system-standard compiler. I did so by running: ccmake ../../src/ITK/ -DCMAKE_CXX_COMPILER=/home/doriad/src/gcc-4.5.2/bin/gcc/g++ However, I get: --- CMake Error at /usr/share/cmake/Modules/CMakeTestCXXCompiler.cmake:45 (MESSAGE): The C++ compiler /home/doriad/src/gcc-4.5.2/bin/gcc/g++ is not able to compile a simple test program. It fails with the following output: Change Dir: /home/doriad/bin/ITK/CMakeFiles/CMakeTmp Run Build Command:/usr/bin/gmake cmTryCompileExec/fast /usr/bin/gmake -f CMakeFiles/cmTryCompileExec.dir/build.make CMakeFiles/cmTryCompileExec.dir/build gmake[1]: Entering directory `/home/doriad/bin/ITK/CMakeFiles/CMakeTmp' --- This is indeed the correct path for the compiler: [doriad@daviddesktop ~]$ ~/src/gcc-4.5.2/bin/gcc/g++ g++: no input files I tried creating a fresh build directory and nothing changed. Any suggestions of what else to do to use this compiler? Thanks, David ___ 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://www.cmake.org/mailman/listinfo/cmake ___ 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://www.cmake.org/mailman/listinfo/cmake
Re: [CMake] Changing compiler
On Wed, Apr 20, 2011 at 9:04 AM, David Cole david.c...@kitware.com wrote: If you are setting the CXX compiler, you should also probably be setting the C compiler. I always use environment variables to do this: export CC=/home/doriad/src/gcc-4.5.2/bin/gcc/gcc export CXX=/home/doriad/src/gcc-4.5.2/bin/gcc/g++ ccmake ../../src/ITK If that still doesn't work, then inspect the contents of the file CMakeFiles/CMakeError.log to see what the actual errors are, and post them here. (CMakeFiles/CMakeOutput.log may also have relevant results in it...) HTH, David C. Hm, so there is no 'gcc' executable after I built gcc. Gcc's configure says: The following languages will be built: c,c++,fortran,java,objc. So I'm assuming it should be there? I tried setting the ITK C compiler to g++ as well, but no dice. In CMakeFiles/CMakeError.log of course it says: CMakeCCompilerId.c:2:3: error: #error A C++ compiler has been selected for C. The executables that were built are: [doriad@daviddesktop gcc]$ find . -executable -type f ./as ./cc1-dummy ./jcf-dump ./cc1 ./jvgenmain ./gcj ./config.status ./lto-wrapper ./cc1plus-dummy ./cc1plus ./cc1obj-dummy ./gcov ./nm ./cpp ./f951 ./xgcc ./cc1obj ./gfortran ./collect2 ./collect-ld ./jc1 ./g++ ./gcov-dump Any thoughts? Thanks, David ___ 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://www.cmake.org/mailman/listinfo/cmake
Re: [CMake] Changing compiler
On Wed, Apr 20, 2011 at 9:43 AM, David Doria daviddo...@gmail.com wrote: On Wed, Apr 20, 2011 at 9:04 AM, David Cole david.c...@kitware.com wrote: If you are setting the CXX compiler, you should also probably be setting the C compiler. I always use environment variables to do this: export CC=/home/doriad/src/gcc-4.5.2/bin/gcc/gcc export CXX=/home/doriad/src/gcc-4.5.2/bin/gcc/g++ ccmake ../../src/ITK If that still doesn't work, then inspect the contents of the file CMakeFiles/CMakeError.log to see what the actual errors are, and post them here. (CMakeFiles/CMakeOutput.log may also have relevant results in it...) HTH, David C. Hm, so there is no 'gcc' executable after I built gcc. Gcc's configure says: The following languages will be built: c,c++,fortran,java,objc. So I'm assuming it should be there? I tried setting the ITK C compiler to g++ as well, but no dice. In CMakeFiles/CMakeError.log of course it says: CMakeCCompilerId.c:2:3: error: #error A C++ compiler has been selected for C. The executables that were built are: [doriad@daviddesktop gcc]$ find . -executable -type f ./as ./cc1-dummy ./jcf-dump ./cc1 ./jvgenmain ./gcj ./config.status ./lto-wrapper ./cc1plus-dummy ./cc1plus ./cc1obj-dummy ./gcov ./nm ./cpp ./f951 ./xgcc ./cc1obj ./gfortran ./collect2 ./collect-ld ./jc1 ./g++ ./gcov-dump Any thoughts? Thanks, David Sounds like you must have gotten errors when you built gcc... Pore through the log of what happened during the gcc build maybe? Are you building gcc from source, or using some package manager to build it for you? (MacPorts, something else?) ___ 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://www.cmake.org/mailman/listinfo/cmake
Re: [CMake] Changing compiler flags generated by cmake
On Tue, Jun 22, 2010 at 08:30:43PM -0700, ben scott wrote:
I know about the variable to add custom flags for g++, but how do I get rid
if
unwanted flags? I am writing a program for KDE on Linux and cmake insists on
Something like:
string(REPLACE -ansi CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS})
___
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://www.cmake.org/mailman/listinfo/cmake
Re: [CMake] Changing compiler at runtime
On Nov 25, 2007 2:12 AM, Gonzalo Garramuño [EMAIL PROTECTED] wrote: Recently, Josef Karthauser was requesting the ability to change the compiler at runtime. I am now more or less seconding that request or asking for workarounds. The situation: I have a complex project built for windows that has several plug-ins that, for each version of the project, needs to be compiled with a particular compiler version to keep binary compatibility. Thus, my v3.0 needs to be built against vc6, my v4.0 against vc7.1, my v5.0 against vc8, etc. I am automating the build process for each build as an out of source build, but I also need to automate the changing of the compiler. I don't get it. Why do you need to resolve any of this at runtime? Resolve it 5 times at configuration time, run 5 different configurations. It would be 10 lines in your favorite scripting language. Could invoke with cmake -P mybuildscript if you don't mind CMake script and don't want another language dependency. Cheers, Brandon Van Every ___ CMake mailing list CMake@cmake.org http://www.cmake.org/mailman/listinfo/cmake
