Am 12.09.2014 um 15:13 schrieb Thibaut Paumard:
While it's your prerogative to decrease the severity, please note that
this bug means that all the packages that build-depend on gdc (22
packages in jessie) are currently in an FTBFS-state on kfreebsd.

sure, and they still will ftbfs without libphobos.

It seems that simple drop of kfreebsd-gnu from libphobos_no_systems does not 
suffice.
In the build logs are messages like

/build/manual/gcc-4.9-4.9.1/build/x86_64-kfreebsd-gnu/libphobos/libdruntime/../../../../src/libphobos/libdruntime/rt/dmain2.d:419: undefined reference to `__stdoutp' /build/manual/gcc-4.9-4.9.1/build/x86_64-kfreebsd-gnu/libphobos/libdruntime/../../../../src/libphobos/libdruntime/rt/dmain2.d:421: undefined reference to `__stderrp' /build/manual/gcc-4.9-4.9.1/build/x86_64-kfreebsd-gnu/libphobos/libdruntime/../../../../src/libphobos/libdruntime/rt/dmain2.d:512: undefined reference to `__stderrp' /build/manual/gcc-4.9-4.9.1/build/x86_64-kfreebsd-gnu/libphobos/libdruntime/../../../../src/libphobos/libdruntime/rt/memory.d:147: undefined reference to `_deh_end' /build/manual/gcc-4.9-4.9.1/build/x86_64-kfreebsd-gnu/libphobos/libdruntime/../../../../src/libphobos/libdruntime/core/runtime.d:368: undefined reference to `__stderrp' /build/manual/gcc-4.9-4.9.1/build/x86_64-kfreebsd-gnu/libphobos/libdruntime/../../../../src/libphobos/libdruntime/core/runtime.d:369: undefined reference to `__stderrp' /build/manual/gcc-4.9-4.9.1/build/x86_64-kfreebsd-gnu/libphobos/libdruntime/../../../../src/libphobos/libdruntime/core/runtime.d:384: undefined reference to `__stderrp' /build/manual/gcc-4.9-4.9.1/build/x86_64-kfreebsd-gnu/libphobos/libdruntime/../../../../src/libphobos/libdruntime/core/runtime.d:438: undefined reference to `__stderrp' /build/manual/gcc-4.9-4.9.1/build/x86_64-kfreebsd-gnu/libphobos/libdruntime/../../../../src/libphobos/libdruntime/core/thread.d:2836: undefined reference to `pthread_attr_get_np' /build/manual/gcc-4.9-4.9.1/src/libphobos/libdruntime/core/sys/posix/pthread.d:339: undefined reference to `__pthread_cleanup_push_imp' /build/manual/gcc-4.9-4.9.1/src/libphobos/libdruntime/core/sys/posix/pthread.d:344: undefined reference to `__pthread_cleanup_pop_imp'


The src/gcc/d/patches/patch-versym-os-4.9.x
adds into src/gcc/config/kfreebsd-gnu.h

#undef TARGET_OS_D_BUILTINS
#define TARGET_OS_D_BUILTINS()                                  \
    do {                                                        \
        builtin_define ("FreeBSD");                             \
        builtin_define ("Posix");                               \
        builtin_define ("GNU_GLibc");                           \
    } while (0)


The " builtin_define ("FreeBSD") " is wrong.
We have FreeBSD kernel, but glibc userland.
It have to be sorted somehow.
May be it suffices to drop " builtin_define ("FreeBSD") "
and enhance some .d files to cover GNU_GLibc,
not only OSX, linux, FreeBSD, ...
It might bring sufficient basic support.

The kfreebsd porters needs help from "D expert" here.

Cheers

        Petr


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