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Missing gcc include path when cross compiling #23311

Open yuyichao opened 9 years ago

yuyichao commented 9 years ago
Bugzilla Link 22937
Version 3.7
OS Linux
CC @DougGregor

Extended Description

When cross compiling on linux with clang++, it failed to include a gcc include path although it has clearly found the right gcc version.

With test.cpp being a single line of #include <vector>

% clang++ --target=arm-linux-gnueabihf -c test.cpp -v
clang version 3.6.0 (tags/RELEASE_360/final)
Target: arm--linux-gnueabihf
Thread model: posix
Found candidate GCC installation: /usr/bin/../lib/gcc/arm-linux-gnueabihf/4.9.2
Found candidate GCC installation: /usr/lib/gcc/arm-linux-gnueabihf/4.9.2
Selected GCC installation: /usr/bin/../lib/gcc/arm-linux-gnueabihf/4.9.2
Candidate multilib: .;@m32
Selected multilib: .;@m32
 "/usr/bin/clang" -cc1 -triple armv6--linux-gnueabihf -emit-obj -mrelax-all -disable-free -disable-llvm-verifier -main-file-name test.cpp -mrelocation-model static -mthread-model posix -mdisable-fp-elim -fmath-errno -masm-verbose -mconstructor-aliases -fuse-init-array -target-cpu arm1136jf-s -target-abi aapcs-linux -mfloat-abi hard -target-linker-version 2.25.0 -v -dwarf-column-info -coverage-file /home/yuyichao/tmp/llvm/test.cpp -resource-dir /usr/bin/../lib/clang/3.6.0 -internal-isystem /usr/bin/../lib/gcc/arm-linux-gnueabihf/4.9.2/../../../../include/c++/4.9.2 -internal-isystem /usr/bin/../lib/gcc/arm-linux-gnueabihf/4.9.2/../../../../include/arm-linux-gnueabihf/c++/4.9.2 -internal-isystem /usr/bin/../lib/gcc/arm-linux-gnueabihf/4.9.2/../../../../include/arm--linux-gnueabihf/c++/4.9.2 -internal-isystem /usr/bin/../lib/gcc/arm-linux-gnueabihf/4.9.2/../../../../include/c++/4.9.2/backward -internal-isystem /usr/local/include -internal-isystem /usr/bin/../lib/clang/3.6.0/include -internal-externc-isystem /include -internal-externc-isystem /usr/include -fdeprecated-macro -fdebug-compilation-dir /home/yuyichao/tmp/llvm -ferror-limit 19 -fmessage-length 83 -mstackrealign -fno-signed-char -fobjc-runtime=gcc -fcxx-exceptions -fexceptions -fdiagnostics-show-option -fcolor-diagnostics -o test.o -x c++ test.cpp
clang -cc1 version 3.6.0 based upon LLVM 3.6.0 default target x86_64-unknown-linux-gnu
ignoring nonexistent directory "/usr/bin/../lib/gcc/arm-linux-gnueabihf/4.9.2/../../../../include/arm-linux-gnueabihf/c++/4.9.2"
ignoring nonexistent directory "/usr/bin/../lib/gcc/arm-linux-gnueabihf/4.9.2/../../../../include/arm--linux-gnueabihf/c++/4.9.2"
ignoring nonexistent directory "/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/bin/../lib/gcc/arm-linux-gnueabihf/4.9.2/../../../../include/c++/4.9.2
 /usr/bin/../lib/gcc/arm-linux-gnueabihf/4.9.2/../../../../include/c++/4.9.2/backward
 /usr/local/include
 /usr/bin/../lib/clang/3.6.0/include
 /usr/include
End of search list.
In file included from test.cpp:1:
In file included from /usr/bin/../lib/gcc/arm-linux-gnueabihf/4.9.2/../../../../include/c++/4.9.2/vector:60:
/usr/bin/../lib/gcc/arm-linux-gnueabihf/4.9.2/../../../../include/c++/4.9.2/bits/stl_algobase.h:59:10: fatal error: 
      'bits/c++config.h' file not found
#include <bits/c++config.h>
         ^
1 error generated.

Adding the include path manually solves the problem.

% clang --target=arm-linux-gnueabihf -c test.cpp -I/usr/arm-linux-gnueabihf/include/c++/4.9.2/arm-linux-gnueabihf
yuyichao commented 8 years ago

Also, seems that I forgot to mention. This is on ArchLinux.

yuyichao commented 8 years ago

Ping.

Still seeing this on Clang 3.7 and Gcc 5.2.0.

llvmbot commented 2 months ago

@llvm/issue-subscribers-clang-driver

Author: Yichao Yu (yuyichao)

| | | | --- | --- | | Bugzilla Link | [22937](https://llvm.org/bz22937) | | Version | 3.7 | | OS | Linux | | CC | @DougGregor | ## Extended Description When cross compiling on linux with clang++, it failed to include a gcc include path although it has clearly found the right gcc version. With `test.cpp` being a single line of `#include <vector>` ```console % clang++ --target=arm-linux-gnueabihf -c test.cpp -v clang version 3.6.0 (tags/RELEASE_360/final) Target: arm--linux-gnueabihf Thread model: posix Found candidate GCC installation: /usr/bin/../lib/gcc/arm-linux-gnueabihf/4.9.2 Found candidate GCC installation: /usr/lib/gcc/arm-linux-gnueabihf/4.9.2 Selected GCC installation: /usr/bin/../lib/gcc/arm-linux-gnueabihf/4.9.2 Candidate multilib: .;@m32 Selected multilib: .;@m32 "/usr/bin/clang" -cc1 -triple armv6--linux-gnueabihf -emit-obj -mrelax-all -disable-free -disable-llvm-verifier -main-file-name test.cpp -mrelocation-model static -mthread-model posix -mdisable-fp-elim -fmath-errno -masm-verbose -mconstructor-aliases -fuse-init-array -target-cpu arm1136jf-s -target-abi aapcs-linux -mfloat-abi hard -target-linker-version 2.25.0 -v -dwarf-column-info -coverage-file /home/yuyichao/tmp/llvm/test.cpp -resource-dir /usr/bin/../lib/clang/3.6.0 -internal-isystem /usr/bin/../lib/gcc/arm-linux-gnueabihf/4.9.2/../../../../include/c++/4.9.2 -internal-isystem /usr/bin/../lib/gcc/arm-linux-gnueabihf/4.9.2/../../../../include/arm-linux-gnueabihf/c++/4.9.2 -internal-isystem /usr/bin/../lib/gcc/arm-linux-gnueabihf/4.9.2/../../../../include/arm--linux-gnueabihf/c++/4.9.2 -internal-isystem /usr/bin/../lib/gcc/arm-linux-gnueabihf/4.9.2/../../../../include/c++/4.9.2/backward -internal-isystem /usr/local/include -internal-isystem /usr/bin/../lib/clang/3.6.0/include -internal-externc-isystem /include -internal-externc-isystem /usr/include -fdeprecated-macro -fdebug-compilation-dir /home/yuyichao/tmp/llvm -ferror-limit 19 -fmessage-length 83 -mstackrealign -fno-signed-char -fobjc-runtime=gcc -fcxx-exceptions -fexceptions -fdiagnostics-show-option -fcolor-diagnostics -o test.o -x c++ test.cpp clang -cc1 version 3.6.0 based upon LLVM 3.6.0 default target x86_64-unknown-linux-gnu ignoring nonexistent directory "/usr/bin/../lib/gcc/arm-linux-gnueabihf/4.9.2/../../../../include/arm-linux-gnueabihf/c++/4.9.2" ignoring nonexistent directory "/usr/bin/../lib/gcc/arm-linux-gnueabihf/4.9.2/../../../../include/arm--linux-gnueabihf/c++/4.9.2" ignoring nonexistent directory "/include" #include "..." search starts here: #include <...> search starts here: /usr/bin/../lib/gcc/arm-linux-gnueabihf/4.9.2/../../../../include/c++/4.9.2 /usr/bin/../lib/gcc/arm-linux-gnueabihf/4.9.2/../../../../include/c++/4.9.2/backward /usr/local/include /usr/bin/../lib/clang/3.6.0/include /usr/include End of search list. In file included from test.cpp:1: In file included from /usr/bin/../lib/gcc/arm-linux-gnueabihf/4.9.2/../../../../include/c++/4.9.2/vector:60: /usr/bin/../lib/gcc/arm-linux-gnueabihf/4.9.2/../../../../include/c++/4.9.2/bits/stl_algobase.h:59:10: fatal error: 'bits/c++config.h' file not found #include <bits/c++config.h> ^ 1 error generated. ``` Adding the include path manually solves the problem. ```console % clang --target=arm-linux-gnueabihf -c test.cpp -I/usr/arm-linux-gnueabihf/include/c++/4.9.2/arm-linux-gnueabihf ```