gcc: cannot find -lubsan

gcc: cannot find -lubsan

[Steven Penny]

I have installed the "gcc-core" package:

    $ gcc --version
    gcc (GCC) 4.9.3

Using this file:

http://gcc.gnu.org/git?p=gcc.git;a=blob;f=gcc/testsuite/c-c%2B%2B-common/ubsan/undefined-1.c;hb=382ecb

and this command:

    gcc -fsanitize=undefined undefined-1.c

yields this result:

    /usr/lib/gcc/x86_64-pc-cygwin/4.9.3/../../../../x86_64-pc-cygwin/bin/ld:
cannot find -lubsan
    collect2: error: ld returned 1 exit status

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Re: gcc: cannot find -lubsan

[Yaakov Selkowitz]

On Tue, 2015-10-27 at 20:58 -0500, Steven Penny wrote:
> I have installed the "gcc-core" package:
> 
>     $ gcc --version
>     gcc (GCC) 4.9.3
> 
> Using this file:
> 
> http://gcc.gnu.org/git?p=gcc.git;a=blob;f=gcc/testsuite/c-c%2B%2B-common/ubsan/undefined-1.c;hb=382ecb
> 
> and this command:
> 
>     gcc -fsanitize=undefined undefined-1.c
> 
> yields this result:
> 
>     /usr/lib/gcc/x86_64-pc-cygwin/4.9.3/../../../../x86_64-pc-cygwin/bin/ld:
> cannot find -lubsan
>     collect2: error: ld returned 1 exit status

The various sanitizers in recent versions of GCC are not currently
supported on Cygwin.

--
Yaakov



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Re: gcc: cannot find -lubsan

[Csaba Raduly]

On Wed, Oct 28, 2015 at 5:36 PM, Yaakov Selkowitz  wrote:
>
> The various sanitizers in recent versions of GCC are not currently
> supported on Cygwin.

Then it would be nicer if GCC reported an error (rather than compile
dozens of files and then fail to link them at the end).

This is likely a GCC issue (I don't know whether GCC can be
configured/built so it knows sanitizers are not supported).

Csaba
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