[swift-users] SwiftPM: import ncurses -> conflicting types

[Ankit Aggarwal]

ncurses is already present in the macOS sdk, so you don't need to install it via brew.

In CNCurses package, create a file called "shim.h":
$ cat shim.h
#include "ncurses.h"

and change the modulemap to this: 
$ cat module.modulemap
module CNCurses [system] {
  header "shim.h"
  link "ncurses"
  export *
}

> On 29-Dec-2016, at 1:25 AM, Bouke Haarsma via swift-users <swift-users at swift.org> wrote:
> 
> Hi all,
> 
> I'm trying to build something with ncurses. There's this outdated tutorial: http://dev.iachieved.it/iachievedit/ncurses-with-swift-on-linux/. In order to build, a system module map was provided here: https://github.com/iachievedit/CNCURSES. This assumes `/usr/include/ncurses.h`, which is not available on MacOS 10.12. So I've installed ncurses through homebrew and updated the modulemap: https://github.com/Bouke/CNCurses. Sadly though, it doesn't work and I can't figure out how to get it working.
> 
>> brew install homebrew/dupes/ncurses
> 
> Module map:
> 
>> module CNCurses [system] {
>>    header "/usr/local/Cellar/ncurses/6.0_2/include/ncurses.h"
>>    link "ncurses"
>>    export *
>> }
> 
> I'm building with the following command, the flags taken from the package provided ncurses.pc:
> 
>> swift build \
>> 	-Xcc -D_DARWIN_C_SOURCE \
>> 	-Xcc -I/usr/local/Cellar/ncurses/6.0_2/include \
>> 	-Xcc -I/usr/local/Cellar/ncurses/6.0_2/include/ncursesw \
>> 	-Xlinker -L/usr/local/Cellar/ncurses/6.0_2/lib
> 
> This produces the following error message (shortened):
> 
>> Compile Swift Module 'TermDraw' (1 sources)
>> <module-includes>:1:9: note: in file included from <module-includes>:1:
>> #import "/usr/local/Cellar/ncurses/6.0_2/include/ncurses.h"
>>        ^
>> /usr/local/Cellar/ncurses/6.0_2/include/ncurses.h:60:10: error: 'ncursesw/ncurses_dll.h' file not found with <angled> include; use "quotes" instead
>> #include <ncursesw/ncurses_dll.h>
>>         ^
>> <module-includes>:1:9: note: in file included from <module-includes>:1:
>> #import "/usr/local/Cellar/ncurses/6.0_2/include/ncurses.h"
>>        ^
>> /usr/local/Cellar/ncurses/6.0_2/include/ncurses.h:653:45: error: conflicting types for 'keyname'
>> extern NCURSES_EXPORT(NCURSES_CONST char *) keyname (int);              /* implemented */
>>                                            ^
>> /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/include/curses.h:598:45: note: previous declaration is here
>> extern NCURSES_EXPORT(NCURSES_CONST char *) keyname (int);              /* implemented */
>>                                            ^
>> <module-includes>:1:9: note: in file included from <module-includes>:1:
>> #import "/usr/local/Cellar/ncurses/6.0_2/include/ncurses.h"
>>        ^
> 
> (and goes on for quite a few other conflicting types)
> 
> Any help on getting this to build is greatly appreciated. Example code can be found here: https://github.com/Bouke/TermDraw
> 
> ---
> Thanks,
> Bouke
> 
> 
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