[esnacc-dev] "cross" compile

[Aaron Conole]

>> On July 25, 2017 at 9:29 AM Aaron Conole <aconole at bytheb.org> wrote:
>> 
>> 
>> Hi Marty,
>> 
>> Marty Galligan <m_galligan at comcast.net> writes:
>> 
>> > I'm using esnacc to build a daemon.  The daemon build happens on
>> > Ubuntu, the daemon is targeted to run on windows.  So I need to build
>> > libcxxsn1.a as a windows binary.
>> >
>> > Running configure with --build=i686-pc-linux-gnu
>> > --host=i686-pc-windows didn't work, the cross compiling g++ I'm using
>> > gave me an error of  .../lib/libc++asn1.a: member
>> > .../lib/libc++asn1.a(cxx_lib_libcxxasn1_la-asn-null.o) in archive is
>> > not an object
>> > collect2: ld returned 1 exit status
>> 
>> On my system, I have installed mingw32, and I can do:
>> 
>>    CC=i686-w64-mingw32-gcc CXX=i686-w64-mingw32-g++ \
>>    AR=i686-w64-mingw32-ar RANLIB=i686-w64-mingw32-ranlib \
>>    ./configure --build=x86_64-pc-linux-gnu --host=i686-w64-mingw32 && \
>>    make -j8
>> 
>> Which does produce a cxx-lib/.libs/libcxxasn1.a
>> 
>> - that said -
>> 
>> I get an error:
>> 
>>    /bin/sh: compiler/esnacc.exe: cannot execute binary file: Exec format error
>> 
>> This is from trying to build ROSE support when cross compiling.  I'll
>> submit a first order fix for this (to disable during cross
>> compilation), and then probably the build system will have to make a
>> native version even when cross-compiling.
>> 
>> > libc++asn1.a is a soft link to libcxxasn1.a
>> 
>> Where did that soft link come from?  I don't think the build system
>> creates this.  If it does that's a bug.
> I added this link, because I had half a dozen makefiles that referenced the old libc++asn1.a name.

Probably a better idea to move it somewhere else, or change the
makefiles.  I realize that was an ABI/API change from 1.7 to 1.8 -
apologies.

>> > How can I generate a libcxxasn1.a for windows, while building on linux?
>> >
>> >
>> > -Marty Galligan, m_galligan at comcast.net, c: 978-505-5185  
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