pngpaste: error: use of undeclared identifier 'NSBitmapImageFileTypeGIF'

[ryandesign (Ryan Carsten Schmidt)]

pngpaste doesn't build on OS X 10.11 or earlier:

​https://build.macports.org/builders/ports-10.11_x86_64-builder/builds/135593/steps/install-port/logs/stdio

pngpaste.m:108:45: error: use of undeclared identifier 'NSBitmapImageFileTypeGIF'
            @"gif": [NSNumber numberWithInt:NSBitmapImageFileTypeGIF],
                                            ^
pngpaste.m:109:46: error: use of undeclared identifier 'NSBitmapImageFileTypeJPEG'
            @"jpeg": [NSNumber numberWithInt:NSBitmapImageFileTypeJPEG],
                                             ^
pngpaste.m:110:45: error: use of undeclared identifier 'NSBitmapImageFileTypeJPEG'
            @"jpg": [NSNumber numberWithInt:NSBitmapImageFileTypeJPEG],
                                            ^
pngpaste.m:111:45: error: use of undeclared identifier 'NSBitmapImageFileTypePNG'
            @"png": [NSNumber numberWithInt:NSBitmapImageFileTypePNG],
                                            ^
pngpaste.m:112:45: error: use of undeclared identifier 'NSBitmapImageFileTypeTIFF'
            @"tif": [NSNumber numberWithInt:NSBitmapImageFileTypeTIFF],
                                            ^
pngpaste.m:113:46: error: use of undeclared identifier 'NSBitmapImageFileTypeTIFF'
            @"tiff": [NSNumber numberWithInt:NSBitmapImageFileTypeTIFF],
                                             ^
pngpaste.m:116:49: error: use of undeclared identifier 'NSBitmapImageFileTypePNG'
    NSBitmapImageFileType bitmapImageFileType = NSBitmapImageFileTypePNG;
                                                ^
7 errors generated.

These things were ​introduced in macOS 10.12.

If the port can be fixed to compile on earlier systems, great. If not, please mark it as incompatible with those older systems using a pre-fetch block. For an example of how to do that, look in the mongodb Portfile.