On Tue, Aug 21, 2018 at 11:41 PM, Robert Dailey <rcdailey.li...@gmail.com> wrote:
> I'll explain a bit why I'm asking. I noticed that for code bases that > work on Android plus other UNIX platforms, they unconditionally > specify `-stdlib=libc++`, however this doesn't work on Ubuntu by > default, which uses gnu stl + gcc/clang. So you get compiler errors. > There's no way for me to "search" a platform to see if it is eligible > for the libc++ flag, I simply have to either disable it completely or > conditionally include it based on target platform and/or toolchain. > None of these really address the root cause. > > I'm not even really sure what a find module for this would do... but > typically find modules don't provide compiler flags, so I'm not sure > if that's the right tool for the job. Would love to hear from the > developers on this, so I've cross posted to the dev mailing list in > this reply. > Excuse the brevity, but it sounds like you might be looking for the CXX_EXTENSIONS target property (sorry if I've misunderstood your problem, let me know why it isn't appropriate if so). See the following article for a more complete overview of this and related properties: https://crascit.com/2015/03/28/enabling-cxx11-in-cmake/ > On Mon, Aug 20, 2018 at 10:05 PM Thompson, KT <k...@lanl.gov> wrote: > > > > I'm also interested in the answer to Robert's question. I've been using > > > > set( CMAKE_CXX_FLAGS "${CMAKE_C_FLAGS} -stdlib=libc++") > > > > but it seems like there should be a more elegant approach. > > > > -tk > > > > -----Original Message----- > > From: CMake <cmake-boun...@cmake.org> On Behalf Of Robert Dailey > > Sent: Monday, August 20, 2018 11:48 AM > > To: CMake <cmake@cmake.org> > > Subject: [CMake] libc++ usage in CMake with Clang? > > > > Is the only way to use libc++ to muck with compile flags? Or is there a > proper find module for this or something? Is there a more CMake-esque way > of specifying the STL library to use with the toolchain? > > -- > > > > Powered by www.kitware.com > > > > Please keep messages on-topic and check the CMake FAQ at: > http://www.cmake.org/Wiki/CMake_FAQ > > > > Kitware offers various services to support the CMake community. For more > information on each offering, please visit: > > > > CMake Support: http://cmake.org/cmake/help/support.html > > CMake Consulting: http://cmake.org/cmake/help/consulting.html > > CMake Training Courses: http://cmake.org/cmake/help/training.html > > > > Visit other Kitware open-source projects at http://www.kitware.com/ > opensource/opensource.html > > > > Follow this link to subscribe/unsubscribe: > > https://cmake.org/mailman/listinfo/cmake > -- > > Powered by www.kitware.com > > Please keep messages on-topic and check the CMake FAQ at: > http://www.cmake.org/Wiki/CMake_FAQ > > Kitware offers various services to support the CMake community. For more > information on each offering, please visit: > > CMake Support: http://cmake.org/cmake/help/support.html > CMake Consulting: http://cmake.org/cmake/help/consulting.html > CMake Training Courses: http://cmake.org/cmake/help/training.html > > Visit other Kitware open-source projects at http://www.kitware.com/ > opensource/opensource.html > > Follow this link to subscribe/unsubscribe: > https://cmake.org/mailman/listinfo/cmake-developers > -- Craig Scott Melbourne, Australia https://crascit.com New book released: Professional CMake: A Practical Guide <https://crascit.com/professional-cmake/>
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