Changes between Version 1 and Version 2 of Ticket #54215, comment 12


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Timestamp:
Sep 6, 2017, 9:41:59 PM (7 years ago)
Author:
kencu (Ken)
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  • Ticket #54215, comment 12

    v1 v2  
    44
    55There is a way to build libgcc with `default abi 4` so that software built with newer GCCs would be compatible with the systems libstdc++ even if the ABI4 flag is not passed in during the build (like it is with the cxx11 1.1 PortGroup). I suspect the issue could lie in there...
     6
     7This is the block I usually will add to the libgcc Portfile (gcc6 before, gcc7 now) to accomplish that default. Several unix distros do this same thing as well I notice. It basically does for all builds what the cxx flags in the cxx11 1.1 PortGroup does on a case by case basis. To me it makes sense; in case you want to build a port one-off with gcc6 or gcc7 specified on the command line, it will have the right ABI (4).
     8
     9{{{
     10default_variants +defaultabi4
     11variant defaultabi4 description "use gcc4 compatible ABI" {
     12    configure.args-append --with-default-libstdcxx-abi=gcc4-compatible
     13}}}