Transparency disabled when using different compile options

[drunkensapo]

Dear all,
I have an ongoing project which uses magick, and it is in a very mature state. Everything works on linux, mac and windows without a flaw. I even ported everything to iOS and still works like a charm. However, due to a compatibility problem with another library, I had to recompile my iOS version to disable png and jpeg support. In this trimmed version, transparency is not working at all.
The configure options I'm using are the following:

Code: Select all

./configure --disable-opencl --disable-largefile --with-quantum-depth=8 --with-magick-plus-plus --without-fontconfig --without-tiff --without-lcms --without-lcms2 --without-lzma --without-perl --without-x --disable-shared --disable-openmp --without-bzlib --without-freetype --without-openexr --without-jpeg --without-png

Is there any option that could accidentaly disable it?
Thanks in advance.
Best,
Juan

[snibgo]

In this trimmed version, transparency is not working at all.

I don't know the answer, but it would help if you show a command that demonstrates the problem.

[drunkensapo]

Is not a command, it is C++ code writing directly to the alpha channel of an image. If I run it from the version compiled with png and jpg it works, if I run from the version without them, I get no transparency. I will post an example later.

[drunkensapo]

I think I found the problem. I still don't know why happens. I will post later. Thanks.