[LLVMdev] [cfe-dev] use of undeclared identifier '__NR_*' error while building clang

[Sandeep K Chaudhary]

Hi Reid,

Thanks for the reply !

Earlier the build was complaining about not having /asm in /usr/include so
I created a symbolic link to it with asm-generic, after that I am
encountering this issue.

I just grep'ed for '__NR_fork', and I can see these numbers in the header
files.

sandeep at ubuntu:/usr/include$ grep -rni __NR_fork .
./asm-generic/unistd.h:850:#define __NR_fork 1079
./asm-generic/unistd.h:852:__SYSCALL(__NR_fork, sys_fork)
./asm-generic/unistd.h:854:__SYSCALL(__NR_fork, sys_ni_syscall)
./asm-generic/unistd.h:858:#define __NR_syscalls (__NR_fork+1)
./x86_64-linux-gnu/asm/unistd_x32.h:51:#define __NR_fork (__X32_SYSCALL_BIT
+ 57)
./x86_64-linux-gnu/asm/unistd_64.h:61:#define __NR_fork 57
./x86_64-linux-gnu/asm/unistd_32.h:6:#define __NR_fork 2
./x86_64-linux-gnu/bits/syscall.h:70:#define SYS_fork __NR_fork
./x86_64-linux-gnu/bits/syscall.h:418:#define SYS_fork __NR_fork
./x86_64-linux-gnu/bits/syscall.h:730:#define SYS_fork __NR_fork

So these numbers are available in /usr/include. Are these not sufficient?

Thanks,
Sandeep.




On Mon, Jun 9, 2014 at 8:37 PM, Reid Kleckner <rnk at google.com> wrote:

> -cfe-dev
>
> Based on your question on IRC, it sounds like there's something wrong with
> your Linux headers.  Make sure you have something that provides the syscall
> numbers in /usr/include.  My workstation has them in
> x86_64-linux-gnu/asm/unistd_(32|64).h:
>
> $ ack '__NR_fork' /usr/include/
> /usr/include/asm-generic/unistd.h
> 849:#define __NR_fork 1079
> 851:__SYSCALL(__NR_fork, sys_fork)
> 853:__SYSCALL(__NR_fork, sys_ni_syscall)
> 857:#define __NR_syscalls (__NR_fork+1)
>
> /usr/include/x86_64-linux-gnu/asm/unistd_32.h
> 10:#define __NR_fork              2
>
> /usr/include/x86_64-linux-gnu/asm/unistd_64.h
> 136:#define __NR_fork                           57
> 137:__SYSCALL(__NR_fork, stub_fork)
>
> /usr/include/x86_64-linux-gnu/bits/syscall.h
> 70:#define SYS_fork __NR_fork
> 417:#define SYS_fork __NR_fork
>
>
> On Mon, Jun 9, 2014 at 5:08 PM, Sandeep K Chaudhary <
> babbusandy2006 at gmail.com> wrote:
>
>> Hi guys,
>>
>> I am following this[1] tutorial to install clang. However, I have made a
>> small change in the configure command, and I am running it with
>> '--enable-optimized' option to avoid the debug build.
>>
>> I am getting the errors (given at the end) related to *undeclared
>> identifiers '__NR_*'*. Can someone please provide some input about how
>> to tackle this issue?
>>
>> On my other machine, I followed the same guide[1] (without the
>> --enable-optimized option), and everything built successfully.
>>
>> [1] http://clang.llvm.org/get_started.html
>>
>> ====================
>> warning: clang_darwin.mk: dropping arch 'x86_64h' from lib 'ubsan_osx'
>> (ld does not support it)
>>  make[5]: Entering directory
>> `/home/sandeep/llvm_clang/llvm/projects/compiler-rt'
>>   COMPILE:   clang_linux/san-i386/i386:
>> /home/sandeep/llvm_clang/llvm/projects/compiler-rt/lib/sanitizer_common/sanitizer_linux.cc
>> /home/sandeep/llvm_clang/llvm/projects/compiler-rt/lib/sanitizer_common/sanitizer_linux.cc:123:27:
>> error: use of undeclared identifier '__NR_open'
>>   return internal_syscall(SYSCALL(open), (uptr)filename, flags);
>>                           ^
>> /home/sandeep/llvm_clang/llvm/projects/compiler-rt/lib/sanitizer_common/sanitizer_syscall_generic.inc:17:24:
>> note: expanded from macro 'SYSCALL'
>> # define SYSCALL(name) __NR_ ## name
>>                        ^
>> <scratch space>:62:1: note: expanded from here
>> __NR_open
>> ^
>> /home/sandeep/llvm_clang/llvm/projects/compiler-rt/lib/sanitizer_common/sanitizer_linux.cc:132:27:
>> error: use of undeclared identifier '__NR_open'
>>   return internal_syscall(SYSCALL(open), (uptr)filename, flags, mode);
>>                           ^
>> --------------
>>
>> /home/sandeep/llvm_clang/llvm/projects/compiler-rt/lib/sanitizer_common/sanitizer_linux.cc:516:27:
>> error: use of undeclared identifier '__NR_fork'
>>   return internal_syscall(SYSCALL(fork));
>>                           ^
>> /home/sandeep/llvm_clang/llvm/projects/compiler-rt/lib/sanitizer_common/sanitizer_syscall_generic.inc:17:24:
>> note: expanded from macro 'SYSCALL'
>> # define SYSCALL(name) __NR_ ## name
>>                        ^
>> <scratch space>:62:1: note: expanded from here
>> __NR_fork
>> ^
>> 12 errors generated.
>> make[5]: ***
>> [/home/sandeep/llvm_clang/build/tools/clang/runtime/compiler-rt/clang_linux/san-i386/i386/SubDir.lib__sanitizer_common/sanitizer_linux.o]
>> Error 1
>> make[5]: Leaving directory
>> `/home/sandeep/llvm_clang/llvm/projects/compiler-rt'
>> make[4]: *** [BuildRuntimeLibraries] Error 2
>> make[4]: Leaving directory
>> `/home/sandeep/llvm_clang/build/tools/clang/runtime/compiler-rt'
>> make[3]: *** [compiler-rt/.makeall] Error 2
>> make[3]: Leaving directory
>> `/home/sandeep/llvm_clang/build/tools/clang/runtime'
>> make[2]: *** [all] Error 1
>> make[2]: Leaving directory `/home/sandeep/llvm_clang/build/tools/clang'
>> make[1]: *** [clang/.makeall] Error 2
>> make[1]: Leaving directory `/home/sandeep/llvm_clang/build/tools'
>> make: *** [all] Error 1
>>
>> Thanks and regards,
>> Sandeep.
>>
>>
>> _______________________________________________
>> cfe-dev mailing list
>> cfe-dev at cs.uiuc.edu
>> http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev
>>
>>
>


-- 
Thanks and regards,
Sandeep K Chaudhary.
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