ImageMagick won't compile with PNG Support on Ubuntu

Question

I hope I'm missing something stupid simple.

I'm trying to compile ImageMagick from source on Ubuntu 15.10. It compiles and runs just fine, but support for PNGs is missing. Both libpng and libpng-dev are installed but ImageMagick is having none of it:

./configure --with-quantum-depth=8 --enable-hdri --with-bzlib=yes --with-jpeg=yes --with-png=yes --with-tiff=yes
...
checking for PNG... no
....
PNG               --with-png=yes              no
....
Options used to compile and link:
PREFIX          = /usr/local
EXEC-PREFIX     = /usr/local
VERSION         = 6.9.3
CC              = gcc
CFLAGS          =  -fopenmp -g -O2 -Wall -mtune=haswell -fexceptions -pthread -DMAGICKCORE_HDRI_ENABLE=1 -DMAGICKCORE_QUANTUM_DEPTH=8
CPPFLAGS        =   -DMAGICKCORE_HDRI_ENABLE=1 -DMAGICKCORE_QUANTUM_DEPTH=8
PCFLAGS         = 
DEFS            = -DHAVE_CONFIG_H
LDFLAGS         = 
LIBS            = 
CXX             = g++
CXXFLAGS        = -g -O2 -pthread
FEATURES        = DPC HDRI Cipher OpenMP
DELEGATES       = bzlib mpeg jbig jpeg ps tiff

Thank you for any help you can provide!

Answer 1

I don't know what the problem was but I know how to fix it.

sudo apt-get build-dep imagemagick

Now I'm sure that I'm not missing any dependencies and PNG support was automatic.

Answer 2

Try to add png in the list of DELEGATES.

Try to add "--with-png"

Try adding "--with-modules"