llvm dev - Apr 2015 - [LLVMdev] libclang_rt.asan-x86_64.a: No such file or directory

I just tried building the latest clang following the instructions in
http://clang.llvm.org/get_started.html, and got this error when trying to
compile at test program:

/usr/bin/ld: cannot find
/home/davem/clang-235334/bin/../lib/clang/3.7.0/lib/linux/libclang_rt.asan-x86_64.a:
No such file or directory

This thread:

http://lists.cs.uiuc.edu/pipermail/llvmdev/2015-April/084175.html

indicates that the solution is to start with a clean build, but that's
what I just tried, and it still failed.

Here's my install log:

$ rm -rf ~/tmp/clang
$ mkdir ~/tmp/clang; cd ~/tmp/clang
$ svn co http://llvm.org/svn/llvm-project/llvm/trunk llvm
$ cd llvm/tools
$ svn co http://llvm.org/svn/llvm-project/cfe/trunk clang
$ cd ../..
$ export clang_version=235086
$ cd llvm/tools/clang/tools
$ svn co http://llvm.org/svn/llvm-project/clang-tools-extra/trunk extra
$ cd ../../../..
$ cd llvm/projects
$ svn co http://llvm.org/svn/llvm-project/compiler-rt/trunk compiler-rt
$ cd ../..
$ mkdir $HOME/clang-$clang_version
$ mkdir build; cd build
$ ../llvm/configure --prefix=$HOME/clang-$clang_version --enable-optimized
--disable-assertions
$ make && make install
$ cd ~/tmp; mv clang/ clang.hide # make sure build dir isn't needed

$ bash
$ PATH=/home/davem/clang-$clang_version/bin:$PATH
$ echo $PATH
/home/davem/clang-235334/bin:/usr/lib64/ccache:/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/home/davem/bin:/home/davem/bin-perl
$ which clang
~/clang-235334/bin/clang
$ cat d.c
int main(int argc, char**argv)
{
    char *p = (char*)0x1234;
    *p = 0;
}

$ clang -fsanitize=address -o d d.c
/usr/bin/ld: cannot find
/home/davem/clang-235334/bin/../lib/clang/3.7.0/lib/linux/libclang_rt.asan-x86_64.a:
No such file or directory
clang: error: linker command failed with exit code 1 (use -v to see invocation)

This recipe has worked for me in the past.


-- 
"Do not dabble in paradox, Edward, it puts you in danger of fortuitous
wit."
    -- Lady Croom, "Arcadia"

+Chris

Oh, I see. We've dropped support for ASan in autotools build a while ago.
The recommended build process now involves CMake:
http://llvm.org/docs/GettingStarted.html#getting-started-quickly-a-summary

I will update the www page shortly.

On Tue, Apr 21, 2015 at 5:35 AM, Dave Mitchell <davem at iabyn.com> wrote:
> I just tried building the latest clang following the instructions in
> http://clang.llvm.org/get_started.html, and got this error when trying to
> compile at test program:
>
> /usr/bin/ld: cannot find
>
/home/davem/clang-235334/bin/../lib/clang/3.7.0/lib/linux/libclang_rt.asan-x86_64.a:
> No such file or directory
>
> This thread:
>
> http://lists.cs.uiuc.edu/pipermail/llvmdev/2015-April/084175.html
>
> indicates that the solution is to start with a clean build, but that's
> what I just tried, and it still failed.
>
> Here's my install log:
>
> $ rm -rf ~/tmp/clang
> $ mkdir ~/tmp/clang; cd ~/tmp/clang
> $ svn co http://llvm.org/svn/llvm-project/llvm/trunk llvm
> $ cd llvm/tools
> $ svn co http://llvm.org/svn/llvm-project/cfe/trunk clang
> $ cd ../..
> $ export clang_version=235086
> $ cd llvm/tools/clang/tools
> $ svn co http://llvm.org/svn/llvm-project/clang-tools-extra/trunk extra
> $ cd ../../../..
> $ cd llvm/projects
> $ svn co http://llvm.org/svn/llvm-project/compiler-rt/trunk compiler-rt
> $ cd ../..
> $ mkdir $HOME/clang-$clang_version
> $ mkdir build; cd build
> $ ../llvm/configure --prefix=$HOME/clang-$clang_version --enable-optimized
> --disable-assertions
> $ make && make install
> $ cd ~/tmp; mv clang/ clang.hide # make sure build dir isn't needed
>
> $ bash
> $ PATH=/home/davem/clang-$clang_version/bin:$PATH
> $ echo $PATH
>
>
/home/davem/clang-235334/bin:/usr/lib64/ccache:/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/home/davem/bin:/home/davem/bin-perl
> $ which clang
> ~/clang-235334/bin/clang
> $ cat d.c
> int main(int argc, char**argv)
> {
>     char *p = (char*)0x1234;
>     *p = 0;
> }
>
> $ clang -fsanitize=address -o d d.c
> /usr/bin/ld: cannot find
>
/home/davem/clang-235334/bin/../lib/clang/3.7.0/lib/linux/libclang_rt.asan-x86_64.a:
> No such file or directory
> clang: error: linker command failed with exit code 1 (use -v to see
> invocation)
>
> This recipe has worked for me in the past.
>
>
> --
> "Do not dabble in paradox, Edward, it puts you in danger of fortuitous
> wit."
>     -- Lady Croom, "Arcadia"
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>


-- 
Alexey Samsonov
vonosmas at gmail.com
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On Tue, Apr 21, 2015 at 10:30:34AM -0700, Alexey Samsonov
wrote:
> Oh, I see. We've dropped support for ASan in autotools build a while
ago.
> The recommended build process now involves CMake:
> http://llvm.org/docs/GettingStarted.html#getting-started-quickly-a-summary
That did the trick, thanks.

-- 
Wesley Crusher gets beaten up by his classmates for being a smarmy git,
and consequently has a go at making some friends of his own age for a
change.
    -- Things That Never Happen in "Star Trek" #18

I have architecture in which only legal type supported is i64. 

So inside getCopyToParts() function. when ValueVT=f32 and PartVT==i64 
I added code to handle this condition inside 
if(NumParts * PartBits > ValueVT.getSizeInBits()) block 
as follows: 

if(ValueVT == EVT(MVT::f32) && PartVT == MVT::i64){ 
    SDValue IntMVal = DAG.getNode(ISD::FP_EXTEND, DL, MVT::f64, Val); 
    Val = DAG.getNode(ISD::BITCAST, DL, PartVT, IntMVal); 
} 

And inside getCopyFromParts() function at the end I added: 
if(ValueVT == EVT(MVT::f32)) { 
    SDValue IntMVal = DAG.getNode(ISD::TRUNCATE, DL, EVT(MVT::i32), Val);
return DAG.getNode(ISD::BITCAST, DL, ValueVT, IntMVal); 
} 


After giving -debug to llc, in Optimized lowered selection DAG phase I get 
sequence: 

                  0x21103e0: i64,ch = CopyFromReg 0x20d86e0, 0x210e6b0 
[ORD=4] 

                0x210e7b0: i32 = truncate 0x21103e0 [ORD=4] 

              0x2110ce0: f32 = bitcast 0x210e7b0 [ORD=4] 

              0x210ffd0: f32 = ConstantFP<1.000000e+00> 

            0x210e5b0: f32 = fadd 0x2110ce0, 0x210ffd0 [ORD=4] 

          0x210f7d0: f64 = fp_extend 0x210e5b0 [ORD=4] 

        0x210f3d0: i64 = bitcast 0x210f7d0 [ORD=4] 

      0x210deb0: ch = CopyToReg 0x20d86e0, 0x21106e0, 0x210f3d0 [ORD=4] 

after this llc fails in Legalizer: 

"Operand not processed? 
0x210deb0: ch = CopyToReg 0x20d86e0, 0x21106e0, 0x2125d30 [ORD=4] [ID=1] 
" 

with third operand of CopyToReg some garbage value. 
What am I doing wrong ? 

Thanks, 
Akhsay.