[cfe-users] Standard headers cannot be found when compiling with Clang

[Qiuping Yi via cfe-users]

I use ubuntu,

$ uname -a
Linux novice 3.11.0-15-generic #25~precise1-Ubuntu SMP Thu Jan 30 17:39:31
UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

and this is the output of 'clang -v -c'

$ clang -v -c test.c
clang version 3.6.0 (tags/RELEASE_360/final)
Target: x86_64-unknown-linux-gnu
Thread model: posix
 "/home/novice/installed/llvm-3.6.0.src/Release+Asserts/bin/clang" -cc1
-triple x86_64-unknown-linux-gnu -emit-obj -mrelax-all -disable-free
-main-file-name t1.c -mrelocation-model static -mthread-model posix
-mdisable-fp-elim -fmath-errno -masm-verbose -mconstructor-aliases
-munwind-tables -target-cpu x86-64 -v -dwarf-column-info -coverage-file
/home/novice/installed/llvm-3.6.0.src/Release+Asserts/bin/t1.c
-resource-dir
"/home/novice/installed/llvm-3.6.0.src/Release+Asserts/bin/\${CLANG_RESOURCE_DIR}"
-isysroot "\${DEFAULT_SYSROOT}" -c-isystem /home/novice/.install/include
-cxx-isystem /home/novice/.install/include -internal-isystem
"\${DEFAULT_SYSROOT}/usr/local/include" -internal-isystem
"/home/novice/installed/llvm-3.6.0.src/Release+Asserts/bin/\${CLANG_RESOURCE_DIR}/include"
-internal-externc-isystem "\${C_INCLUDE_DIRS}" -fdebug-compilation-dir
/home/novice/installed/llvm-3.6.0.src/Release+Asserts/bin -ferror-limit 19
-fmessage-length 205 -mstackrealign -fobjc-runtime=gcc
-fdiagnostics-show-option -fcolor-diagnostics -o t1.o -x c
/home/novice/installed/llvm-3.2.src/examples/test/t1.c
clang -cc1 version 3.6.0 based upon ${BACKEND_PACKAGE_STRING} default
target x86_64-unknown-linux-gnu
ignoring nonexistent directory "/home/novice/.install/include"
ignoring nonexistent directory "/home/novice/.install/include"
ignoring nonexistent directory "${DEFAULT_SYSROOT}/usr/local/include"
ignoring nonexistent directory
"/home/novice/installed/llvm-3.6.0.src/Release+Asserts/bin/${CLANG_RESOURCE_DIR}/include"
ignoring nonexistent directory "${C_INCLUDE_DIRS}"
#include "..." search starts here:
End of search list.
/home/novice/installed/llvm-3.2.src/examples/test/t1.c:2:10: fatal error:
'stdio.h' file not found
#include <stdio.h>
         ^
1 error generated.

I put clang in llvm-3.6.0.src/toos/...


--------------------------------------------
Qiuping Yi
Institute Of Software
Chinese Academy of Sciences

On Sat, Jan 16, 2016 at 12:56 AM, Hans Wennborg <hans at chromium.org> wrote:

> On Fri, Jan 15, 2016 at 7:06 AM, Qiuping Yi via cfe-users
> <cfe-users at lists.llvm.org> wrote:
> > Hello All,
> >
> > I am a beginner of clang. I installed clang 3.6 with llvm 3.6, but I
> found
> > my clang cannot work as expected.
> > For the next simple program test.c:
> >
> > #include <stdio.h>
> > int main() {return 0;}
> >
> > $ clang -c test.c
> >
> > I got the next information:
> >
> > fatal error: 'stdio.h' file not found
> > #include <stdio.h>
> >              ^
> > 1 error generated.
> >
> > what's wrong? I found other standard headers are also cannot be found.
> > Any suggestion is OK. Thank you in advance.
>
> What operating system are you using?
>
> What's the output of "clang -v -c test.c"?
>
> From where did you install clang?
>
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