Building with PNG Delegate problems using libpng-1.6.32

[eiichi]

I'm trying to build ImageMagick7.0.6-9 with png delegate on macOS 10.12.6.

1) Configure Options:

Code: Select all

export LDFLAGS="-L/usr/local/libpng/lib/"
export CPPFLAGS="-I/usr/local/libpng/include"
export PKG_CONFIG_PATH="/usr/local/libpng/lib/pkgconfig/"
./configure --prefix=/usr/local/magick --with-png

2) Using libpng-1.6.30, I can compile ending up with "PNG --with-png=yes yes" and succeed to build with png delegate.

3) Using libpng-1.6.32, configuration ends up with "PNG --with-png=yes no".

Is this a bug of "libpng-1.6.32" or "ImageMagick7.0.6-9"?

[snibgo]

I can't answer the question, but I suggest you read the config.log that IM made for more details about why "--with-png" failed.

[eiichi]

I can't answer the question, but I suggest you read the config.log that IM made for more details about why "--with-png" failed.

Thanks.

This is from config.log

Config.log using libpng-1.6.30:

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configure:33622: checking for PNG
configure:33629: $PKG_CONFIG --exists --print-errors "libpng >= 1.0.0"
configure:33632: $? = 0
configure:33646: $PKG_CONFIG --exists --print-errors "libpng >= 1.0.0"
configure:33649: $? = 0
configure:33687: result: yes
configure:33691: result:

Config.log using libpng-1.6.32:

Code: Select all

configure:33622: checking for PNG
configure:33629: $PKG_CONFIG --exists --print-errors "libpng >= 1.0.0"
Package zlib was not found in the pkg-config search path.
Perhaps you should add the directory containing `zlib.pc'
to the PKG_CONFIG_PATH environment variable
Package 'zlib', required by 'libpng', not found
configure:33632: $? = 1
configure:33646: $PKG_CONFIG --exists --print-errors "libpng >= 1.0.0"
Package zlib was not found in the pkg-config search path.
Perhaps you should add the directory containing `zlib.pc'
to the PKG_CONFIG_PATH environment variable
Package 'zlib', required by 'libpng', not found
configure:33649: $? = 1
configure:33663: result: no
Package 'zlib', required by 'libpng', not found
configure:33691: result:

[eiichi]

I can solve the problem.

1) I installed zlib-1.2.11 into /usr/local/zlib.

2) Add configuration option:

Code: Select all

 export PKG_CONFIG_PATH="/usr/local/libpng2/lib/pkgconfig/:/usr/local/zlib/lib/pkgconfig/"

3) Using libpng-1.6.32, I can compile ending up with "PNG --with-png=yes yes" and succeed to build with png delegate.

Thanks.