I could spot the difference between the two versions. It can be seen by running: ./refgen test.cpp -std=c++11 -v
With the ubuntu libclang, the output I get is (stripped to the essential bits): Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8 ignoring nonexistent directory "/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/x86_64-linux-gnu" ignoring nonexistent directory "../lib/clang/3.4/include" ignoring nonexistent directory "/include" #include "..." search starts here: #include <...> search starts here: /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8 /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/backward /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/x86_64-linux-gnu/c++/4.8 /usr/local/include /usr/lib/gcc/x86_64-linux-gnu/4.8/include /usr/include/x86_64-linux-gnu /usr/include End of search list. However, with the PPA libclang, the output is: Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8 ignoring nonexistent directory "/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/x86_64-linux-gnu" ignoring nonexistent directory "../lib/clang/3.4.2/include" ignoring nonexistent directory "/include" #include "..." search starts here: #include <...> search starts here: /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8 /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/backward /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/x86_64-linux-gnu/c++/4.8 /usr/include/clang/3.4.2/include /usr/local/include /usr/lib/gcc/x86_64-linux-gnu/4.8/include /usr/include/x86_64-linux-gnu /usr/include End of search list. It is essentially identical, except that the PPA version has one additional line that makes it all work: /usr/include/clang/3.4.2/include Now where this line came from, or why was it removed in the official ubuntu version, I have no clue... I will contact the author of the PPA to see if he could help. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to llvm-toolchain-3.4 in Ubuntu. https://bugs.launchpad.net/bugs/1432882 Title: libclang1 has wrong standard include paths Status in llvm-toolchain-3.4 package in Ubuntu: New Bug description: Bug affects all versions of libclang1 I could test (3.3, 3.4 and 3.5). The precise version of libclang I have is 1:3.4-1ubuntu3. Running Ubuntu 14.04 (Linux Mint 17.1). When building a minimal libclang program (refgen.cpp, attached) and using the "-print-search-dirs" command line argument to output the standard header search directories, libclang outputs the following: programs: =:/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../x86_64-linux-gnu/bin libraries: =../lib/clang/3.4:/usr/lib/gcc/x86_64-linux-gnu/4.8:/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../x86_64-linux-gnu:/lib/x86_64-linux-gnu:/lib/../lib64:/usr/lib/x86_64-linux-gnu:/usr/lib/gcc/x86_64-linux-gnu/4.8/../../..:/lib:/usr/lib Notice the leading "../lib/clang/3.4" in "libraries", which does not make any sense and is likely missing part of the path. Notice also the leading ":" in "programs", which probably doesn't hurt, but looks suspicious. For reference, running clang (3.4) with the same command line argument outputs: programs: =/usr/bin:/usr/bin/../lib/gcc/x86_64-linux-gnu/4.8/../../../../x86_64-linux-gnu/bin libraries: =/usr/bin/../lib/clang/3.4:/usr/bin/../lib/gcc/x86_64-linux-gnu/4.8:/usr/bin/../lib/gcc/x86_64-linux-gnu/4.8/../../../x86_64-linux-gnu:/lib/x86_64-linux-gnu:/lib/../lib64:/usr/lib/x86_64-linux-gnu:/usr/bin/../lib/gcc/x86_64-linux-gnu/4.8/../../..:/lib:/usr/lib One can see here that the leading "/usr/bin/" has probably been stripped somehow from the "programs" and "libraries" search paths in libclang1. The end result is that libclang1 does not find clang's standard headers, and falls back to using GCC's, which it does not support. In my case, this means that if I try to parse even the simplest of files (test.cpp, attached) with this libclang1 and C++11 support enabled, the parsing fails because libclang1 is failing to understand GCC's SSE intrinsics in /usr/lib/gcc/x86_64-linux-gnu/4.8/include/ia32intrin.h, generating lots of errors: /usr/lib/gcc/x86_64-linux-gnu/4.8/include/ia32intrin.h:41:10: error: use of undeclared identifier '__builtin_ia32_bsrsi' /usr/lib/gcc/x86_64-linux-gnu/4.8/include/ia32intrin.h:89:10: error: use of undeclared identifier '__builtin_ia32_rdpmc' /usr/lib/gcc/x86_64-linux-gnu/4.8/include/ia32intrin.h:97:10: error: use of undeclared identifier '__builtin_ia32_rdtsc' /usr/lib/gcc/x86_64-linux-gnu/4.8/include/ia32intrin.h:105:10: error: use of undeclared identifier '__builtin_ia32_rdtscp' /usr/lib/gcc/x86_64-linux-gnu/4.8/include/ia32intrin.h:113:10: error: use of undeclared identifier '__builtin_ia32_rolqi' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/llvm-toolchain-3.4/+bug/1432882/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
