* Newly require `-link-defaultlib-shared` for implicit dllimport.
E.g., this enables to compile druntime DLL with `-fvisibility=public`
for pure exports and no (local) imports (such as builtin TypeInfos).
* `-link-defaultlib-shared` alone now only implicitly imports symbols
from druntime/Phobos.
This simplifies building complex DLLs linked against a bunch of
static libs (dub only supports static lib dependencies!); the static
libs don't need to be compiled with `-fvisibility=public` anymore
(if the DLL itself isn't either), `-link-defaultlib-shared` is
sufficient.
This is mainly useful for existing DLLs with explicit exports, to make
them link against *shared* druntime/Phobos and so end up with a single
druntime/Phobos for the whole process.
Init symbols, TypeInfos (classes only) & vtables - unless defined in a
root module. For explicitly exported aggregates, or, with
`-fvisibility=public`, all aggregates.
Functions can and apparently are magically stubbed (something like
`void myFunc() { (*__imp_myFunc)(); }`), but it seems we cannot avoid
dllimport for global variables exported from other DLLs/executables.
In order to try to make druntime etc. work as DLL without explicitly
exporting all required globals, `-fvisibility=public` now also assumes
all `extern(D)` globals *not* defined in some root module are exported
from some binary and dllimports them accordingly.
So e.g. compiling Phobos with `-fvisibility=public` means
* Phobos exports all defined symbols,
* Phobos dllimports extern(D) druntime symbols, and
* extern(C) globals, e.g., from the C runtime, remain external and are
linked regularly.
To pave the way for simple DLL generation (end goal:
druntime-ldc-shared.dll).
The dllexport storage class for functions definitions is enough; the
automatically generated import .lib seems to resolve the regular symbol
name to the actual symbol (__imp_*), so dllimport for declarations seems
superfluous.
For global variables, things are apparently different unfortunately.
The semantics were almost identical, except for DtoIsTemplateInstance()
checking the specified Dsymbol and its parents, while isInstantiated()
starts from its parent and ignores the symbol itself.
After a quick glance, we seem to have fed it with {Aggregate,Func,Var}
Declarations only, so should be fine with the default front-end variant.
I.e., *define* templated symbols in each referencing compilation unit
when using discardable linkonce_odr linkage, analogous to C++.
This makes each compilation unit self-sufficient wrt. templated symbols,
which also means increased opportunity for inlining and less need for
LTO. There should be no more undefined symbol issues caused by buggy
template culling.
The biggest advantage is that the optimizer can discard unused
linkonce_odr symbols early instead of optimizing and forwarding to the
assembler. So this is especially useful with -O to decrease compilation
times and can at least in some scenarios greatly outweigh the
(potentially very much) higher number of symbols defined by the glue
layer.
Libraries compiled with -linkonce-templates can generally not be linked
against dependent code compiled without -linkonce-templates; the other
way around works.
Also adds the CMake infrastructure to compile and link the D source files.
The build is partially broken:
- A few files in Phobos and druntime do not build
- MSVC build is broken because of unresolved symbols involving reals
This fixes a regression introduced in caa2f15c8a. The IrDsymbol
metadata is obviously reset in between modules, while IrTypes
are not. Thus, we can never set symbol metadata when resolving
types, as the symbol data will be wrong in all modules following
the one where the type was first resolved.
GitHub: Fixes#739.
Adds some constructors and moves the code to the header file. Uses some of the new constructors.
A big problem with the source are the different strategies used for otherwise similar classes.
E.g. a IrField registers itself with the VarDeclaration. Same is required for IrParameter, but
in this case it is done by the caller.
Previously, we just had a hack to make ref foreach statements work.
This commit enables them to work in other cases as well, like the
implicit __result variable for functions with out-contracts (which
is such a magic ref variable for ref-returning functions).
Fixes DMD testcase 'testcontracts'.
Removed use of dyn_cast, llvm no compiles
without exceptions and rtti by
default. We do need exceptions for the libconfig stuff, but rtti isn't
necessary (anymore).
Debug info needs to be rewritten, as in LLVM 2.7 the format has
completely changed. To have something to look at while rewriting, the
old code has been wrapped inside #ifndef DISABLE_DEBUG_INFO , this means
that you have to define this to compile at the moment.
Updated tango 0.99.9 patch to include updated EH runtime code, which is
needed for LLVM 2.7 as well.
Fixed function literals in static initializers.
Changed alignment of delegates from 2*PTRSIZE to just PTRSIZE.
Changed errors to go to stderr instead of stdout.
Fairly major rewriting of struct/union/class handling, STILL A BIT BUGGY !!!
