I've used instructions on the website and it worked for me (setting Clang in CC= CXX= env vars before CMake invocation seems fine).
On Thu, Feb 7, 2013 at 3:22 AM, Howard Hinnant <[email protected]> wrote: > Because of: > > http://llvm.org/bugs/show_bug.cgi?id=15182 > > I am asking for a review of the CMake building instructions on the libcxx > website: > > http://libcxx.llvm.org > > I have no clue if our website is right or wrong. I just want somebody in > the know to double check. > > Thanks much. > > Howard > > On Dec 31, 2012, at 2:34 PM, Michael J. Spencer <[email protected]> > wrote: > > > Author: mspencer > > Date: Mon Dec 31 13:34:21 2012 > > New Revision: 171316 > > > > URL: http://llvm.org/viewvc/llvm-project?rev=171316&view=rev > > Log: > > [CMake] Fix c++ abi library configuration on Linux. > > > > You can now configure from the command line using: > > -DLIBCXX_CXX_ABI=libsupc++ > > -DLIBCXX_LIBSUPCXX_INCLUDE_PATHS="path;path > > > > Also documents how to build on Linux. > > > > Modified: > > libcxx/trunk/CMakeLists.txt > > libcxx/trunk/lib/CMakeLists.txt > > libcxx/trunk/www/index.html > > > > Modified: libcxx/trunk/CMakeLists.txt > > URL: > http://llvm.org/viewvc/llvm-project/libcxx/trunk/CMakeLists.txt?rev=171316&r1=171315&r2=171316&view=diff > > > ============================================================================== > > --- libcxx/trunk/CMakeLists.txt (original) > > +++ libcxx/trunk/CMakeLists.txt Mon Dec 31 13:34:21 2012 > > @@ -40,6 +40,9 @@ > > option(LIBCXX_ENABLE_SHARED "Build libc++ as a shared library." ON) > > > > set(CXXABIS none libcxxabi libcxxrt libsupc++) > > +if (NOT DEFINED LIBCXX_CXX_ABI) > > + set(LIBCXX_CXX_ABI "none") > > +endif() > > set(LIBCXX_CXX_ABI "${LIBCXX_CXX_ABI}" CACHE STRING > > "Specify C++ ABI library to use." FORCE) > > set_property(CACHE LIBCXX_CXX_ABI PROPERTY STRINGS "";${CXXABIS}) > > @@ -63,9 +66,10 @@ > > ) > > set(LIBCXX_TARGET_TRIPLE ${LIBCXX_TARGET_TRIPLE} CACHE STRING "Target > triple.") > > > > -if (${LIBCXX_CXX_ABI} STREQUAL "libsupc++") > > - set(LIBCXX_LIBSUPCXX_INCLUDE_PATHS "" CACHE STRINGS > > - "Paths to libsupc++ include directories. Separate by system > separator") > > +if ("${LIBCXX_CXX_ABI}" STREQUAL "libsupc++") > > + set(LIBCXX_LIBSUPCXX_INCLUDE_PATHS "${LIBCXX_LIBSUPCXX_INCLUDE_PATHS}" > > + CACHE STRINGS > > + "Paths to libsupc++ include directories separate by ';'.") > > set(LIBCXX_CXX_ABI_LIBRARIES stdc++) > > set(LIBCXX_LIBSUPCXX_FILES > > cxxabi.h > > @@ -75,6 +79,9 @@ > > bits/cxxabi_tweaks.h > > bits/cxxabi_forced.h > > ) > > + # Create include directories. > > + file(MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/include") > > + file(MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/include/bits") > > set(LIBCXX_LIBSUPCXX_FILE_PATHS) > > foreach(path ${LIBCXX_LIBSUPCXX_FILES}) > > set(found FALSE) > > @@ -106,7 +113,7 @@ > > FILES_MATCHING > > PATTERN "*" > > ) > > -elseif (${LIBCXX_CXX_ABI} NOT STREQUAL "none") > > +elseif (NOT "${LIBCXX_CXX_ABI}" STREQUAL "none") > > message(FATAL_ERROR > > "Currently only none and libsupc++ are supported for c++ abi.") > > endif () > > > > Modified: libcxx/trunk/lib/CMakeLists.txt > > URL: > http://llvm.org/viewvc/llvm-project/libcxx/trunk/lib/CMakeLists.txt?rev=171316&r1=171315&r2=171316&view=diff > > > ============================================================================== > > --- libcxx/trunk/lib/CMakeLists.txt (original) > > +++ libcxx/trunk/lib/CMakeLists.txt Mon Dec 31 13:34:21 2012 > > @@ -31,7 +31,9 @@ > > ) > > endif() > > > > -add_dependencies(cxx ${LIBCXX_CXX_ABI_DEPS}) > > +if (DEFINED LIBCXX_CXX_ABI_DEPS) > > + add_dependencies(cxx ${LIBCXX_CXX_ABI_DEPS}) > > +endif() > > > > # Generate library list. > > set(libraries ${LIBCXX_CXX_ABI_LIBRARIES}) > > > > Modified: libcxx/trunk/www/index.html > > URL: > http://llvm.org/viewvc/llvm-project/libcxx/trunk/www/index.html?rev=171316&r1=171315&r2=171316&view=diff > > > ============================================================================== > > --- libcxx/trunk/www/index.html (original) > > +++ libcxx/trunk/www/index.html Mon Dec 31 13:34:21 2012 > > @@ -116,6 +116,7 @@ > > > <!--=====================================================================--> > > > > <p>libc++ is a 100% complete C++11 implementation on Apple's OS X. > </p> > > + <p>LLVM and Clang can self host in C++ and C++11 mode with libc++ on > Linux.</p> > > > > <p> > > Ports to other platforms are underway. Here are recent test > > @@ -205,6 +206,60 @@ > > (<a href="http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev";>clang > mailing list</a>).</p> > > > > > <!--=====================================================================--> > > + <h2>Build on Linux using CMake and libsupc++.</h2> > > + > <!--=====================================================================--> > > + > > + <p> > > + You will need libstdc++ in order to provide libsupc++. > > + </p> > > + > > + <p> > > + Figure out where the libsupc++ headers are on your system. On > Ubuntu this > > + is <code>/usr/include/c++/<version></code> and > > + <code>/usr/include/c++/<version>/<target-triple></code> > > + </p> > > + > > + <p> > > + You can also figure this out by running > > + <pre> > > +$ echo | g++ -Wp,-v -x c++ - -fsyntax-only > > +ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu" > > +ignoring nonexistent directory > "/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../x86_64-linux-gnu/include" > > +#include "..." search starts here: > > +#include <...> search starts here: > > + /usr/include/c++/4.7 > > + /usr/include/c++/4.7/x86_64-linux-gnu > > + /usr/include/c++/4.7/backward > > + /usr/lib/gcc/x86_64-linux-gnu/4.7/include > > + /usr/local/include > > + /usr/lib/gcc/x86_64-linux-gnu/4.7/include-fixed > > + /usr/include/x86_64-linux-gnu > > + /usr/include > > +End of search list. > > + </pre> > > + > > + Note the first two entries happen to be what we are looking for. > This > > + may not be correct on other platforms. > > + </p> > > + > > + <p> > > + We can now run CMake: > > + <ul> > > + <li><code>CC=clang CXX=clang++ cmake -G "Unix Makefiles" > > + -DLIBCXX_CXX_ABI=libsupc++ > > + > > -DLIBCXX_LIBSUPCXX_INCLUDE_PATHS="/usr/include/c++/4.7/;/usr/include/c++/4.7/x86_64-linux-gnu/" > > + -DCMAKE_BUILD_TYPE=Release > > + -DCMAKE_INSTALL_PREFIX=/usr > > + <libc++-source-dir></code></li> > > + <li><code>make</code></li> > > + <li><code>sudo make install</code></li> > > + </ul> > > + <p> > > + You can now run clang with -stdlib=libc++. > > + </p> > > + </p> > > + > > + > <!--=====================================================================--> > > <h2>Design Documents</h2> > > > <!--=====================================================================--> > > > > > > > > _______________________________________________ > > cfe-commits mailing list > > [email protected] > > http://lists.cs.uiuc.edu/mailman/listinfo/cfe-commits > > _______________________________________________ > cfe-commits mailing list > [email protected] > http://lists.cs.uiuc.edu/mailman/listinfo/cfe-commits > -- Alexey Samsonov, MSK
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