Summary:
Patch from a series of patches to rename EAPI symbols to specific
library DSOs.
= The Rationale =
This patch is from a series of patches to rename EAPI symbols to
specific library DSOs.
EAPI was designed to be able to pass
`__attribute__ ((visibility ("default")))` for symbols with
GCC, which would mean that even if -fvisibility=hidden was used
when compiling the library, the needed symbols would get exported.
MSVC __almost__ works like GCC (or mingw) in which you can
declare everything as export and it will just work (slower, but
it will work). But there's a caveat: global variables will not
work the same way for MSVC, but works for mingw and GCC.
For global variables (as opposed to functions), MSVC requires
correct DSO visibility for MSVC: instead of declaring a symbol as
export for everything, you need to declare it as import when
importing from another DSO and export when defining it locally.
With current EAPI definitions, we get the following example
working in mingw and MSVC (observe it doesn't define any global
variables as exported symbols).
Example 1:
dll1:
```
EAPI void foo(void);
EAPI void bar()
{
foo();
}
```
dll2:
```
EAPI void foo()
{
printf ("foo\n");
}
```
This works fine with API defined as __declspec(dllexport) in both
cases and for gcc defining as
`__atttribute__((visibility("default")))`.
However, the following:
Example 2:
dll1:
```
EAPI extern int foo;
EAPI void foobar(void);
EAPI void bar()
{
foo = 5;
foobar();
}
```
dll2:
```
EAPI int foo = 0;
EAPI void foobar()
{
printf ("foo %d\n", foo);
}
```
This will work on mingw but will not work for MSVC. And that's why
LIBAPI is the only solution that works for MSVC.
Co-authored-by: João Paulo Taylor Ienczak Zanette <jpaulotiz@gmail.com>
Co-authored-by: Lucas Cavalcante de Sousa <lucks.sousa@gmail.com>
Co-authored-by: Ricardo Campos <ricardo.campos@expertise.dev>
Reviewers: vtorri, woohyun, lucas, jptiz
Reviewed By: vtorri, lucas
Subscribers: cedric, #reviewers, #committers
Tags: #efl
Differential Revision: https://phab.enlightenment.org/D12210
this takes the current generated output from eolian for legacy code in
efl and adds it to the tree, then removes legacy references from the
corresponding eo files. in the case where the entire eo file was for
a legacy object, that eo file has been removed from the tree
ref T7724
Reviewed-by: Cedric BAIL <cedric.bail@free.fr>
Differential Revision: https://phab.enlightenment.org/D8178
Summary:
Eolian adds a per-class BETA guard (like EFL_UI_WIN_BETA) to any method tagged
as @beta. This means that any app (and the EFL code) wanting to use BETA features
has to enable them class by class, which is cumbersome.
This commit replaces the individual guards with the global EFL_BETA_API_SUPPORT
guard, so apps only need to define one symbol to access BETA features.
Any usage of the per-class guards has been removed from the EFL code and examples.
When building EFL the global guard is defined by configure, so all EFL methods
already have access to BETA API.
Efl_Core.h and Efl_Ui.h no longer define EFL_BETA_API_SUPPORT. Apps wanting to
use BETA API have to define this symbol before including any EFL header
(It has been added to the examples requiring it).
Test Plan:
make && make check && make examples still work, but there's a lot less #defines
in the code
Reviewers: zmike, bu5hm4n, q66
Reviewed By: q66
Subscribers: cedric, #reviewers, #committers
Tags: #efl
Maniphest Tasks: T6788
Differential Revision: https://phab.enlightenment.org/D7924
Felipe Magno de Almeida
Mike Blumenkrantz
Xavi Artigas
Cedric BAIL