On Wed, May 4, 2016 at 5:02 PM, Bruce Dubbs <[email protected]> wrote:
> Pierre Labastie wrote:
>
>
>> I confirm that GCC-6 is not easy to work with: OpenJDK would not build
>> with
>> it. I do not have CLANG and have no motivation to build it. Furthermore,
>> for
>> OpenJDK, the variables CC and CXX are not honoured! What I have done (as
>> root):
>>
>> mv /usr/bin/gcc{,.orig}
>> cat >/usr/bin/gcc << EOF
>> #!/bin/bash
>> gcc -std=c99 "\$@"
>> EOF
>> mv /usr/bin/g++{,.orig}
>> cat >/usr/bin/g++ << EOF
>> #!/bin/bash
>> gcc -std=c99 "\$@"
>> EOF
>>
>> But that's not enough. The compilation goes to completion, but all the
>> compiled executables segfault
>>
>> Downgrading to gcc-5.3 allowed to build. Tests are currently running, but
>> at
>> least, the executables seem to run.
>>
>
> I agree that gcc6 will cause us problems. I needed to rebuild ptlib and
> ran into errors due to:
>
> 1. Ambiguous overloaded function. I was able to overcome that by
> casting an argument to std::string in several places. Fortunately it
> is only one file. src/ptlib/unix/svcproc.cxx
>
> 2. There is a check for a header that depends on compiler version. It
> fails if the minor version is less than 2. That was fixed by adding
> || __GNUC__ >= 5 to the #if statement. include/ptlib/critsec.h
>
> There are also a TON of warnings about deprecated constructs that creates
> very noisy output. I was able to turn them off my adding
>
> STDCCFLAGS += -Wno-deprecated-declarations
>
> to make/unix.mak.
>
> It will be easy enough to add these fixes to the existing patch, but I
> fear that this will become the rule for a while.
>
> I'll even note that there are warnings about indentation!
>
> -- Bruce
>
> The latest breakage:
gst-plugins-good-1.8.1 fails to install/link with taglib-1.11 installed!:
make[2]: Entering directory
'/sources/gst-plugins-good-1.8.1/gst-plugins-good-1.8.1/ext/taglib'
CXXLD libgsttaglib.la
/usr/bin/ld:
/usr/lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../lib64/libtag.a(id3v2framefactory.cpp.o):
reolocation R_X86_64_32S against `_ZTVN6TagLib5ID3v212FrameFactoryE' can
not be used when making a shared object; recompile with -fPIC
/usr/lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../lib64/libtag.a: error
adding symbols: Bad value
collect2: error: ld returned 1 exit status
make[2]: *** [libgsttaglib.la] Error 1
make[2]: Leaving directory
'/sources/gst-plugins-good-1.8.1/gst-plugins-good-1.8.1/ext/taglib'
Makefile:666: recipe for target 'install-recursive' failed
make[1]: *** [install-recursive] Error 1
The question is... taglib problem or gst-plugins-good problem? I will do
some more research in a little while.
Note that I retyped all of that since I don't have a graphical web browser
on my workstation yet. I need to get through gst-plugins-* first, since I
need webcam support.
Douglas R. Reno
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