Package: libpng++-dev
Version: 0.2.5-1
When trying to compile https://github.com/Malvineous/libgamegraphics I got an
error during configure:
checking if png++ is new enough... configure: error: png++ is too old.
Please download and install png++ newer than 0.2.5.
However when I checked I did have png++ 0.2.5 or newer:
host$ dpkg -l libpng++-dev | tail -1
ii libpng++-dev 0.2.5-1 all C++
interface to the PNG (Portable Network Graphics) library
So I went about digging through config.log and found that the program configure
was compiling to determine if the installed png++ was>= 0.2.5 caused ae error.
I distilled the program further and arrived at this:
host$ cat bug.cpp
#include <png++/png.hpp>
int main ()
{
std::string fn;
png::image<png::index_pixel> png(fn);
return 0;
}
When I try to compile this I get an error message:
host$ g++ -o bug -I/usr/include/libpng12 bug.cpp -lpng
In file included from /usr/include/png++/png.hpp:55:0,
from bug.cpp:1:
/usr/include/png++/consumer.hpp: In instantiation of ‘void png::consumer<pixel,
pixcon, info_holder, interlacing_supported>::read(istream&, const
transformation&) [with istream = std::basic_ifstream<char>; transformation =
png::convert_color_space<png::index_pixel>; pixel
/usr/include/png++/image.hpp:240:13: required from ‘void
png::image<pixel>::read_stream(istream&, const transformation&) [with istream =
std::basic_ifstream<char>; transformation =
png::convert_color_space<png::index_pixel>; pixel = png::index_pixel]’
/usr/include/png++/image.hpp:200:42: required from ‘void
png::image<pixel>::read(const char*, const transformation&) [with
transformation = png::convert_color_space<png::index_pixel>; pixel =
png::index_pixel]’
/usr/include/png++/image.hpp:175:45: required from ‘void
png::image<pixel>::read(const string&, const transformation&) [with
transformation = png::convert_color_space<png::index_pixel>; pixel =
png::index_pixel; std::string = std::basic_string<char>]’
/usr/include/png++/image.hpp:107:47: required from
‘png::image<pixel>::image(const string&) [with pixel = png::index_pixel;
std::string = std::basic_string<char>]’
bug.cpp:5:40: required from here
/usr/include/png++/consumer.hpp:162:25: error: no match for call to ‘(const
png::convert_color_space<png::index_pixel>)
(png::reader<std::basic_ifstream<char>>&)’
transform(rd);
^
At this point I started browsing the patches applied to png++ after 0.2.5 was
released to see if there was anything that could solve my problem. After some
digging I found that r120 indeed contained a patch that resolved the error:
http://svn.savannah.nongnu.org/viewvc?view=rev&root=pngpp&revision=120
http://svn.savannah.nongnu.org/viewvc/trunk/convert_color_space.hpp?root=pngpp&r1=109&r2=120&pathrev=120
I applied these changes and afterwards I could compile the program without
errors:
host$ g++ -o bug -I/usr/include/libpng12 bug.cpp -lpng
host$ echo $?
0
Running the program still fails, but configure never actually links the program,
so this is expected:
host$ ./bug
terminate called after throwing an instance of 'png::std_error'
what(): : No such file or directory
Aborted
For your reference I'm using this version of g++:
host$ dpkg -l g++ | tail -1
ii g++ 4:4.8.1-3 amd64 GNU C++
compiler
I would appreciate if at least the patch in r120 was applied in Debians repo
and released as 0.2.5-2 or similar. This would mean that I would no longer
encounter an error. Thanks! :)
/ Sebastian
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