Re: Building gcc6.3.0 on Ubuntu-20.04

[Dan Kegel <dank@kegel.com>]

Adding --disable-libsanitizer to the configure command might work past that
problem.

Also, if you're not using golang, you might save some time by removing the
,go
from the list of supported languages.


On Tue, Aug 18, 2020 at 8:33 AM Mohana <s18002@students.iitmandi.ac.in>
wrote:

> MATLAB can only work with GCC6.3.0 (
>
> https://in.mathworks.com/matlabcentral/answers/407502-incompatible-gcc-version-with-mex
> ),
> so I hope to get this working, if possible. I applied the changes to file
> sanitizer_platform_limits_posix.cc as per the patch, and now the error is:
>
> In file included from
>
> /home/mohana/gccbuild/../gcc-6.3.0/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc:192:0:
>
> /home/mohana/gccbuild/../gcc-6.3.0/libsanitizer/sanitizer_common/sanitizer_internal_defs.h:254:72:
> error: size of array ‘assertion_failed__1142’ is negative
>      typedef char IMPL_PASTE(assertion_failed_##_, line)[2*(int)(pred)-1]
>                                                                         ^
>
> /home/mohana/gccbuild/../gcc-6.3.0/libsanitizer/sanitizer_common/sanitizer_internal_defs.h:248:30:
> note: in expansion of macro ‘IMPL_COMPILER_ASSERT’
>  #define COMPILER_CHECK(pred) IMPL_COMPILER_ASSERT(pred, __LINE__)
>                               ^~~~~~~~~~~~~~~~~~~~
>
> /home/mohana/gccbuild/../gcc-6.3.0/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h:1410:3:
> note: in expansion of macro ‘COMPILER_CHECK’
>    COMPILER_CHECK(sizeof(((__sanitizer_##CLASS *) NULL)->MEMBER) == \
>    ^~~~~~~~~~~~~~
>
> /home/mohana/gccbuild/../gcc-6.3.0/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc:1142:1:
> note: in expansion of macro ‘CHECK_SIZE_AND_OFFSET’
>  CHECK_SIZE_AND_OFFSET(ipc_perm, mode);
>  ^~~~~~~~~~~~~~~~~~~~~
> make[4]: *** [Makefile:477: sanitizer_platform_limits_posix.lo] Error 1
> make[4]: Leaving directory
> '/home/mohana/gccbuild/x86_64-pc-linux-gnu/libsanitizer/sanitizer_common'
> libtool: link: (cd ".libs" && rm -f "libatomic.so" && ln -s
> "libatomic.so.1.2.0" "libatomic.so")
> make[3]: *** [Makefile:466: all-recursive] Error 1
>
> I hope I applied the patch correctly, just removed the lines with (-) and
> added ones with (+).
>
> On Tue, Aug 18, 2020 at 6:45 PM Jonathan Wakely <jwakely.gcc@gmail.com>
> wrote:
>
> > On Tue, 18 Aug 2020 at 12:07, Mohana <s18002@students.iitmandi.ac.in>
> > wrote:
> > >
> > > I made the changes and this error doesn't occur anymore, but the
> > following happens now:
> > >
> > >
> >
> /home/mohana/gccbuild/../gcc-6.3.0/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc:158:23:
> > fatal error: sys/ustat.h: No such file or directory
> > >  #include <sys/ustat.h>
> > >                        ^
> > > compilation terminated.
> > > make[4]: *** [Makefile:477: sanitizer_platform_limits_posix.lo] Error 1
> > > make[4]: *** Waiting for unfinished jobs....
> > >
> > > It seems ustat is deprecated. How can this be fixed?
> >
> > Why are you building gcc 6.3.0 and not 6.5.0, which already has the
> > fix for both these problems?
> >
> > The patch for this error was
> > https://gcc.gnu.org/g:2cd244789bc75ecdf65824f831986969049a1647
> > specifically
> >
> https://gcc.gnu.org/git/?p=gcc.git;a=blobdiff;f=libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc;h=98825b584d24912df76f9982c2319419c7815bf8;hp=6992f2cd8ac56bcd5102f7440d71137b4458871d;hb=2cd244789bc75ecdf65824f831986969049a1647;hpb=6376168efb4c45d621fbec6472f8c9e84a24e940
> >
> > But you should just use gcc-6.5.0 instead.
> >
>
>