Building a dynamicLibrary result in linker error

[Geod24]

You're probably already aware of it, but search didn't prompt anything so I'm opening a new issue.

Simple use case: dub init testlib
Go into teslib, edit dub.json to add "targetType": "dynamicLibrary" and change app.d main() to test().

Then run dub, and:

geod@Barsoom:~/testlib$ \dub build --compiler=gdc-4.9 --force
testlib: ["testlib"]
Building testlib configuration "library", build type debug.
Running gdc-4.9...
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/4.9/libgphobos2.a(object_.o): relocation R_X86_64_32S against `_D10TypeInfo_m6__initZ' can not be used when making a shared object; recompile with -fPIC
/usr/lib/gcc/x86_64-linux-gnu/4.9/libgphobos2.a: error adding symbols: Bad value
collect2: error: ld returned 1 exit status
FAIL .dub/build/library-debug-linux.posix-x86_64-gdc-4.9-EDE7316C4CF9D54D3D6146C2770BD5A3 testlib dynamicLibrary
Error executing command build: GDC compile run failed with exit code 1

geod@Barsoom:~/testlib$ \dub build --force
testlib: ["testlib"]
Building testlib configuration "library", build type debug.
Compiling...
Linking...
/usr/bin/ld: .dub/build/library-debug-linux.posix-x86_64-dmd-F0AFF9EF6E22D753597E009158EE6446/testlib.o: relocation R_X86_64_32 against `.rodata' can not be used when making a shared object; recompile with -fPIC
.dub/build/library-debug-linux.posix-x86_64-dmd-F0AFF9EF6E22D753597E009158EE6446/testlib.o: error adding symbols: Bad value
collect2: error: ld returned 1 exit status
--- errorlevel 1
FAIL .dub/build/library-debug-linux.posix-x86_64-dmd-F0AFF9EF6E22D753597E009158EE6446 testlib dynamicLibrary
Error executing command build: Link command failed with exit code 1

Note that this is not a dub bug IMO. To work around this issue, one can use:
dmd app.d -fPIC -shared -oftest.so -defaultlib=libphobos2.so
OR
gdc app.d -fPIC -shared -o test.so -nodefaultlibs -lphobos2

[dnadlinger]

Does GDC even support dynamic libraries yet?

[AntonMeep]

Works with DMD and LDC, not sure about GDC but I assume it does too.