Summary:
Patch 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
EAPI is the only solution that worked for MSVC.
Co-authored-by: João Paulo Taylor Ienczak Zanette <jpaulotiz@gmail.com>
Co-authored-by: Ricardo Campos <ricardo.campos@expertise.dev>
Co-authored-by: Lucas Cavalcante de Sousa <lucks.sousa@gmail.com>
Reviewers: vtorri, woohyun, jptiz, lucas
Reviewed By: vtorri
Subscribers: cedric, #reviewers, #committers
Tags: #efl
Differential Revision: https://phab.enlightenment.org/D12196
This handwritten lexer/parser is more strict and cleaner than the previous Ragel based one,
as well as faster and doesn't leak memory (or shouldn't). It's a recursive descent style
parser with separate lexer part (unlike the previous effort) which is run at the same
stage as the parser (so it doesn't pre-lex).
@feature
Before this change, all the .eo files of the directories given with -I
option were parsed. Most of this information was not necessary at all,
since only the classes belonging to the inheritance of the class given
as parameter were needed.
Now, during the parsing of the given class, the inherits classes are
searched and parsed.
A condition is needed to make it work well. To find a filename for a
class, we consider the lowercase of the class name as the filename we
have to parse.
e.g, Elm_Button -> elm_button -> elm_button.eo
It considerably reduces the generation time.
A fix in the tests was needed.
The definition of EAPI was missing in Eolian.h.
Spank on you, Tom! I expect you to be perfect and to tell me those
things before I push all the stuff ;-)
Imported by Tom, from the eolian repo which was written by:
Daniel Zaoui <daniel.zaoui@samsung.com>
Yakov Goldberg <yakov.g@samsung.com>
Yossi Kantor <yossi.kantor@samsung.com>
Savio Sena <savio@expertisesolutions.com.br>
Jérémy Zurcher <jeremy@asynk.ch>
Signed-off-by: Tom Hacohen <tom@stosb.com>
Felipe Magno de Almeida
Daniel Kolesa
Daniel Kolesa
Mike Blumenkrantz
Daniel Zaoui
Yossi Kantor
Tom Hacohen