Re: [CMake] How to set compiler flags?
On 1. Oct, 2010, at 10:50 , fat...@crackmonkey.us wrote: Date: Wed, 29 Sep 2010 03:14:57 +0200 From: Michael Hertling mhertl...@online.de Subject: Re: [CMake] How to set compiler flags? To: cmake@cmake.org Message-ID: 4ca29311.1050...@online.de Content-Type: text/plain; charset=ISO-8859-1 [...] So I now use add_definitions instead: add_definitions( -Wall -m64 -O3 ) Is there a better way of doing this? Don't do this at all, and adhere to the flags. Interesting - I've been doing this: if(CMAKE_BUILD_TYPE EQUAL Debug) set(CMAKE_CXX_FLAGS -Wno-long-long -Wno-comment -Wwrite-strings -std=c++0x -pedantic-errors -pedantic -Wall -W -g -gdwarf-2 -Weffc++ -Wmain -Wextra) else(CMAKE_BUILD_TYPE EQUAL Debug) set(CMAKE_CXX_FLAGS -s etc) endif(CMAKE_BUILD_TYPE EQUAL Debug) because it never occurred to me to do it another way. Is this wrong too? Regards, Adam J Richardson The problem with this is that the cache makes the promise to the user that he can change the flags and you break it. Michael -- There is always a well-known solution to every human problem -- neat, plausible, and wrong. H. L. Mencken PGP.sig Description: This is a digitally signed message part ___ 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] How to set compiler flags?
On 1. Oct, 2010, at 11:23 , David Aldrich wrote: Hi if(CMAKE_BUILD_TYPE EQUAL Debug) set(CMAKE_CXX_FLAGS -Wno-long-long -Wno-comment -Wwrite-strings -std=c++0x -pedantic-errors -pedantic -Wall -W -g -gdwarf-2 -Weffc++ -Wmain -Wextra) else(CMAKE_BUILD_TYPE EQUAL Debug) set(CMAKE_CXX_FLAGS -s etc) endif(CMAKE_BUILD_TYPE EQUAL Debug) As a total non-expert I don't see how this will work because if build type is Debug then CMake will use CMAKE_CXX_FLAGS_DEBUG not CMAKE_CXX_FLAGS. Am I right? Best regards David Wrong. CMAKE_CXX_FLAGS is always used, the configuration-specific values are appended to it. Michael PGP.sig Description: This is a digitally signed message part ___ 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] How to set compiler flags?
Hi Michael Wrong. CMAKE_CXX_FLAGS is always used, the configuration-specific values are appended to it. This is where I groan a little. I haven't read that in the online documentation. Best regards 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] How to set compiler flags?
On 1. Oct, 2010, at 12:45 , David Aldrich wrote: Hi Michael Wrong. CMAKE_CXX_FLAGS is always used, the configuration-specific values are appended to it. This is where I groan a little. I haven't read that in the online documentation. Best regards David Couldn't find it in the docs either (just had a superficial look), but in the CMakeCache.txt it says cleary: //Flags used by the compiler during all build types. CMAKE_CXX_FLAGS:STRING= //Flags used by the compiler during debug builds. CMAKE_CXX_FLAGS_DEBUG:STRING=-g ... Michael -- There is always a well-known solution to every human problem -- neat, plausible, and wrong. H. L. Mencken PGP.sig Description: This is a digitally signed message part ___ 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] How to set compiler flags?
Well I can't argue with that, but I must admit that I have not read CMakeCache.txt ;-) David -Original Message- From: Michael Wild [mailto:them...@gmail.com] Sent: 01 October 2010 11:53 To: David Aldrich Cc: fat...@crackmonkey.us; cmake@cmake.org Subject: Re: [CMake] How to set compiler flags? On 1. Oct, 2010, at 12:45 , David Aldrich wrote: Hi Michael Wrong. CMAKE_CXX_FLAGS is always used, the configuration-specific values are appended to it. This is where I groan a little. I haven't read that in the online documentation. Best regards David Couldn't find it in the docs either (just had a superficial look), but in the CMakeCache.txt it says cleary: //Flags used by the compiler during all build types. CMAKE_CXX_FLAGS:STRING= //Flags used by the compiler during debug builds. CMAKE_CXX_FLAGS_DEBUG:STRING=-g ... Michael -- There is always a well-known solution to every human problem -- neat, plausible, and wrong. H. L. Mencken ___ 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] How to set compiler flags?
Hi Michael [...] So I now use add_definitions instead: add_definitions( -Wall -m64 -O3 ) Is there a better way of doing this? Don't do this at all, and adhere to the flags. Thanks for your advice. Doesn't the DEBUG variant of the flags, e.g. CMAKE_CXX_FLAGS_DEBUG, and other related variables - perhaps in connection with CMAKE_BUILD_TYPE - work for you? Regarding CMAKE_CXX_FLAGS and CMAKE_CXX_FLAGS_RELEASE, is CMAKE_CXX_FLAGS used if no build type is specified and CMAKE_CXX_FLAGS_RELEASE used if the build type is Release? If that is so, I plan to assign my desired release options to CMAKE_CXX_FLAGS_RELEASE and assign that variable to CMAKE_CXX_FLAGS. That way, a release build will happen by default (no build type specified) or if Release is specified. I can handle debug builds using CMAKE_CXX_FLAGS_DEBUG. Am I understanding correctly? Best regards David -Original Message- From: cmake-boun...@cmake.org [mailto:cmake-boun...@cmake.org] On Behalf Of Michael Hertling Sent: 29 September 2010 02:15 To: cmake@cmake.org Subject: Re: [CMake] How to set compiler flags? On 09/28/2010 05:35 PM, David Aldrich wrote: Hi I am writing CMakeLists.txt files for my C++ application. Initially I set the C++ compiler flags by setting CMAKE_CXX_FLAGS: set( CMAKE_CXX_FLAGS -Wall -m64 -O3 ) Then I realised that those flags get passed to the linker as well, which seemed a bit untidy. [...] But possibly necessary: http://www.cmake.org/pipermail/cmake/2010-July/038083.html et seq. [...] So I now use add_definitions instead: add_definitions( -Wall -m64 -O3 ) Is there a better way of doing this? Don't do this at all, and adhere to the flags. My CMakeLists.txt files only handle a release build currently. If you could give me a hint for how to go on to add a debug build option, I would be grateful. Doesn't the DEBUG variant of the flags, e.g. CMAKE_CXX_FLAGS_DEBUG, and other related variables - perhaps in connection with CMAKE_BUILD_TYPE - work for you? Regards, Michael ___ 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 Click https://www.mailcontrol.com/sr/g!Zu+tz8WoHTndxI!oX7Uq0JINmXjwVqUAeEJxkrmVZ0jY kyJOOpuMF6ri4kt+pzfxoBRqvSue5ICd5VsZuQpQ== to report this email as spam. ___ 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] How to set compiler flags?
Hi If that is so, I plan to assign my desired release options to CMAKE_CXX_FLAGS_RELEASE and assign that variable to CMAKE_CXX_FLAGS. That way, a release build will happen by default (no build type specified) or if Release is specified. I can handle debug builds using CMAKE_CXX_FLAGS_DEBUG. Sorry, I have misunderstood. No need to answer. David -Original Message- From: cmake-boun...@cmake.org [mailto:cmake-boun...@cmake.org] On Behalf Of Michael Hertling Sent: 29 September 2010 02:15 To: cmake@cmake.org Subject: Re: [CMake] How to set compiler flags? On 09/28/2010 05:35 PM, David Aldrich wrote: Hi I am writing CMakeLists.txt files for my C++ application. Initially I set the C++ compiler flags by setting CMAKE_CXX_FLAGS: set( CMAKE_CXX_FLAGS -Wall -m64 -O3 ) Then I realised that those flags get passed to the linker as well, which seemed a bit untidy. [...] But possibly necessary: http://www.cmake.org/pipermail/cmake/2010-July/038083.html et seq. [...] So I now use add_definitions instead: add_definitions( -Wall -m64 -O3 ) Is there a better way of doing this? Don't do this at all, and adhere to the flags. My CMakeLists.txt files only handle a release build currently. If you could give me a hint for how to go on to add a debug build option, I would be grateful. Doesn't the DEBUG variant of the flags, e.g. CMAKE_CXX_FLAGS_DEBUG, and other related variables - perhaps in connection with CMAKE_BUILD_TYPE - work for you? Regards, Michael ___ 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 Click https://www.mailcontrol.com/sr/g!Zu+tz8WoHTndxI!oX7Uq0JINmXjwVqUAeEJxkrmVZ0jY kyJOOpuMF6ri4kt+pzfxoBRqvSue5ICd5VsZuQpQ== to report this email as spam. ___ 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
[CMake] How to set compiler flags?
Hi I am writing CMakeLists.txt files for my C++ application. Initially I set the C++ compiler flags by setting CMAKE_CXX_FLAGS: set( CMAKE_CXX_FLAGS -Wall -m64 -O3 ) Then I realised that those flags get passed to the linker as well, which seemed a bit untidy. So I now use add_definitions instead: add_definitions( -Wall -m64 -O3 ) Is there a better way of doing this? My CMakeLists.txt files only handle a release build currently. If you could give me a hint for how to go on to add a debug build option, I would be grateful. Best regards 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] How to set compiler flags?
On 09/28/2010 05:35 PM, David Aldrich wrote: Hi I am writing CMakeLists.txt files for my C++ application. Initially I set the C++ compiler flags by setting CMAKE_CXX_FLAGS: set( CMAKE_CXX_FLAGS -Wall -m64 -O3 ) Then I realised that those flags get passed to the linker as well, which seemed a bit untidy. [...] But possibly necessary: http://www.cmake.org/pipermail/cmake/2010-July/038083.html et seq. [...] So I now use add_definitions instead: add_definitions( -Wall -m64 -O3 ) Is there a better way of doing this? Don't do this at all, and adhere to the flags. My CMakeLists.txt files only handle a release build currently. If you could give me a hint for how to go on to add a debug build option, I would be grateful. Doesn't the DEBUG variant of the flags, e.g. CMAKE_CXX_FLAGS_DEBUG, and other related variables - perhaps in connection with CMAKE_BUILD_TYPE - work for you? Regards, Michael ___ 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
