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Porting to AmigaOS4 thread
Posted on: 2019/2/13 13:20   #1
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Since nobody done it and i really need (want) a central meeting point of all questions porting i start a thread here (yes, i know about OS4Porting and the IRC and some other sites, but i'm not going to register to any more sites, so...)

First question:

I'm trying to port (from scratch) a program (available for linux, windows, mac and android, so i guess pretty portable already) but am stuck with a compiler error which "seems" to be really easy to fix, but alas it's not.

This is the snippet from the file in question (src/dctypes.h, lines 31-40)
...
#include <string>
#include <list>
#include <vector>

using namespace std;


typedef std::string AnsiString;
typedef std::string Utf8String;
typedef std::wstring WideString;
...


and this is the error the compiler is throwing...obviously the mentioned "fix" doesn't comply as #include <string> is already in place
mkdir -p obj
g++ -c -o obj/AdActor.o ../src/AdActor.cpp -I../src -O2 -Wno-write-strings -Wno-conversion-null `freetype-config --cflags` `sdl2-config --cflags` -I/usr/local/include/bass/ 
In file included from ../src/PlatformSDL.h:31,
                 from ../src/dcgf.h:61,
                 from ../src/AdActor.cpp:26:
../src/dctypes.h:40:14: error: 'wstring' in namespace 'std' does not name a type
 typedef std::wstring WideString;
              ^~~~~~~
../src/dctypes.h:40:9: note: 'std::wstring' is defined in header '<string>'; did you forget to '#include <string>'?
../src/dctypes.h:32:1:
+#include <string>
 #include <string>
../src/dctypes.h:40:9:
 typedef std::wstring WideString;
         ^~~
../src/dctypes.h:43:19: error: 'WideString' was not declared in this scope
 typedef std::list<WideString> WideStringList;
                   ^~~~~~~~~~
../src/dctypes.h:43:19: note: suggested alternative: 'Utf8String'
 typedef std::list<WideString> WideStringList;
                   ^~~~~~~~~~
                   Utf8String
../src/dctypes.h:43:29: error: template argument 1 is invalid
 typedef std::list<WideString> WideStringList;
                             ^
../src/dctypes.h:43:29: error: template argument 2 is invalid
../src/dctypes.h:46:21: error: 'WideString' was not declared in this scope
 typedef std::vector<WideString> WideStringArray;
                     ^~~~~~~~~~
../src/dctypes.h:46:21: note: suggested alternative: 'WideStringList'
 typedef std::vector<WideString> WideStringArray;
                     ^~~~~~~~~~
                     WideStringList
../src/dctypes.h:46:31: error: template argument 1 is invalid
 typedef std::vector<WideString> WideStringArray;
                               ^
../src/dctypes.h:46:31: error: template argument 2 is invalid
In file included from ../src/dcgf.h:171,
                 from ../src/AdActor.cpp:26:
../src/BFontTT.h:43:3: error: 'WideString' does not name a type; did you mean 'FT_String'?
   WideString m_Text;
   ^~~~~~~~~~
   FT_String
../src/BFontTT.h:98:18: error: 'WideString' does not name a type; did you mean 'FT_String'?
   TextLine(const WideString& text, int width)
                  ^~~~~~~~~~
                  FT_String
../src/BFontTT.h:104:9: error: 'WideString' does not name a type; did you mean 'FT_String'?
   const WideString& GetText() const { return m_Text; }
         ^~~~~~~~~~
         FT_String
../src/BFontTT.h:107:3: error: 'WideString' does not name a type; did you mean 'FT_String'?
   WideString m_Text;
   ^~~~~~~~~~
   FT_String
../src/BFontTT.h:139:21: error: 'WideString' does not name a type; did you mean 'FT_String'?
  int WrapText(const WideString& text, int maxWidth, int maxHeight, TextLineList& lines);
                     ^~~~~~~~~~
                     FT_String
../src/BFontTT.h:140:25: error: 'WideString' does not name a type; did you mean 'FT_String'?
  void MeasureText(const WideString& text, int maxWidth, int maxHeight, int& textWidth, int& textHeight);
                         ^~~~~~~~~~
                         FT_String
../src/BFontTT.h:142:27: error: 'WideString' does not name a type; did you mean 'FT_String'?
  void PrepareGlyphs(const WideString& text);
                           ^~~~~~~~~~
                           FT_String
../src/BFontTT.h:145:39: error: 'WideString' does not name a type; did you mean 'FT_String'?
  CBSurface* RenderTextToTexture(const WideString& text, int width, TTextAlign align, int maxHeight, int& textOffset);
                                       ^~~~~~~~~~
                                       FT_String
../src/BFontTT.h: In constructor 'CBFontTT::CBCachedTTFontText::CBCachedTTFontText()':
../src/BFontTT.h:55:4: error: 'm_Text' was not declared in this scope
    m_Text = L"";
    ^~~~~~
../src/BFontTT.h:55:4: note: suggested alternative: 'm_Rect'
    m_Text = L"";
    ^~~~~~
    m_Rect
../src/BFontTT.h: In constructor 'CBFontTT::TextLine::TextLine(const int&, int)':
../src/BFontTT.h:100:4: error: 'm_Text' was not declared in this scope
    m_Text = text;
    ^~~~~~
../src/BFontTT.h:100:4: note: suggested alternative: 'm_Rect'
    m_Text = text;
    ^~~~~~
    m_Rect
gmake: *** [obj/AdActor.o] Error 1


Is this one of those c++11 (or higher) errors (which are not or only partly supported yet) or do i need to adapt the source in one way or another?

Using gcc 8.1.0 here
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Re: Porting to AmigaOS4 thread
Posted on: 2019/2/13 14:15   #2
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@Raziel

I think it is great idea, I will also find it handy
That wstring issue... I'm also dealing with it at the moment in one project, but no solution so far
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Re: Porting to AmigaOS4 thread
Posted on: 2019/2/13 14:27   #3
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@Raziel
Wstring stuff is about unicode wide characters (which half implemented if i remember right). So to make it works you can do as Alfkil do for his QT port:

namespace std
{
typedef basic_string<wchar_t> wstring;
}


Cant say how good that hack is, but probably all will works fine except parts where some non-standard text characters will be used in some text.
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Re: Porting to AmigaOS4 thread
Posted on: 2019/2/13 16:14   #4
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@Raziel


If your have "using namespace std; "

Then the following lines, is assumed that is inside std namespace, so you do not need "std::" in the typedef, because it know it's this you're talking about.

So it should be fine to do:

typedef string AnsiString;
typedef string Utf8String;
typedef wstring WideString;


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Re: Porting to AmigaOS4 thread
Posted on: 2019/2/13 16:32   #5
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I've always wanted to know what to do about a program that calls fork().

It's a basic POSIX thing that we don't have on the Amiga.

Thanks!
Bill "tekmage" Borsari
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Re: Porting to AmigaOS4 thread
Posted on: 2019/2/13 16:36   #6
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@tekmage

fork() is Linux kernel thing, it's not posix thing. use pthreads or threads in C++11.

the thing to do is look for Windows workaround for it, as its not supported in windows as well.
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Re: Porting to AmigaOS4 thread
Posted on: 2019/2/13 18:44   #7
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@LiveForIt

Sure? http://man7.org/linux/man-pages/man2/fork.2.html

"POSIX.1-2001, POSIX.1-2008, SVr4, 4.3BSD."
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Re: Porting to AmigaOS4 thread
Posted on: 2019/2/13 18:52   #8
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@tekmage

Which program you are referring to?
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Re: Porting to AmigaOS4 thread
Posted on: 2019/2/13 22:54   #9
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fork()'s so POSIX

I read that as "any program that calls fork()".

--

Suggestions for this sort of thing? to_string doesn't seem to be in std
#include <string>

    int main()
    {
        std::to_string(0);
        return 0;
    }


Edited by Thematic on 2019/2/14 0:57:56
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Re: Porting to AmigaOS4 thread
Posted on: 2019/2/14 4:00   #10
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@Thematic

Quote:

Suggestions for this sort of thing? to_string doesn't seem to be in std

You need C++11 for std::to_string() (see here. So add -std=c++11 or -std=gnu++11 to the compiler's command line parameters. You may also need to use a newer version of GCC.

Hans
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Re: Porting to AmigaOS4 thread
Posted on: 2019/2/14 7:02   #11
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@Hans
gcc is 8.1.0. I've tried lots of things. Even with space marines it won't make any difference.
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Re: Porting to AmigaOS4 thread
Posted on: 2019/2/14 7:16   #12
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@Thematic

Oops! I forgot that I also tweaked one of the header files. Details are here (down the bottom). Switching to clib2 may also work, although you may find that other functions are missing then.

Hans
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Re: Porting to AmigaOS4 thread
Posted on: 2019/2/15 12:31   #13
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@Thematic
Alternatively, if you do not want to touch system headers as Hans show, you can do some workaround like we do in Barony:

#ifdef __amigaos4__
    char buff[50] = {0};
    sprintf(buff, "savegames/savegame%d", saveIndex);
    std::string filename = buff;
#else
    std::string filename = "savegames/savegame" + std::to_string(saveIndex);
#endif


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Re: Porting to AmigaOS4 thread
Posted on: 2019/2/15 20:58   #14
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@kas1e

Thank you, that workaround did the trick.

@Liveforit

Unfortunately that fix doesn't work.
The error changes and the suggested fix does too, but it still breaks.
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Re: Porting to AmigaOS4 thread
Posted on: 2019/2/16 6:54   #15
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@Raziel

An alternative fix for missing std::to_string and std::wstring.

#ifdef __amigaos4__
namespace std {
    template <typename T> string to_string(const T &n) {
        ostringstream strm;
        strm << n;
        return strm.str();
    }

    typedef basic_string<wchar_t> wstring;
}
#endif


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Re: Porting to AmigaOS4 thread
Posted on: 2019/2/16 7:28   #16
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@salass00

Thank you, works too.

This will hopefully become a nice lookup thread for common (porting) problems.
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Re: Porting to AmigaOS4 thread
Posted on: 2019/2/16 17:12   #17
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Next issue...i tried to build (after a year long hiatus) ScummVM with SDL1 (for test cases), but i get a linker error
LINK     scummvm
backends/platform/sdl/sdl.o: In function `OSystem_SDL::setupGraphicsModes()':
backends/platform/sdl/sdl.cpp:721: undefined reference to `SdlAudioCDManager::SdlAudioCDManager()'
gmake: *** [scummvm] Error 1

which is strange, because everything else is picked up correctly and i have the latest SD1 installed
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Re: Porting to AmigaOS4 thread
Posted on: 2019/2/16 18:39   #18
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SDL is written in C, so the SdlAudioCDManager class probably belongs to ScummVM.
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Re: Porting to AmigaOS4 thread
Posted on: 2019/2/16 19:28   #19
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@BSzili

So, it might be a missing #include in the ScummVM code?
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Re: Porting to AmigaOS4 thread
Posted on: 2019/2/16 20:36   #20
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@Raziel

I think missing includes are caught in compilation, unless something weird was attempted maybe? Linking undefined reference suggests missing library, which is all too common. For instance library a could depend on library b, so -la is not enough. Also the order they are in the command line may make a difference.

I learned half the things from this http://www.os4depot.net/index.php?fun ... ment/manual/spots-pfd.lha
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