msys / MinGW，即使已安装，也找不到libpng，试图编译xpdf（特别是pdftopng）

Question

I've installed libpng 1.2, 1.4 and 1.6 from source in MSYS and MingW because I want to compile pdftopng. Used the makefiles included with libpng for msys/MinGW and they seemed to have installed correctly.

Run the xpdf configure script with MSYS's bash, and it fails to find libpng. As part of the output, I get:

checking for png.h presence... no

checking for png.h... no

Couldn't find libpng -- you will not be able to build pdftohtml or pdftopng

So I search for png.h in my MinGW directory and find them in several places:

C:\\MinGW\\msys\\1.0\\local\\include\\libpng

C:\\MinGW\\msys\\1.0\\local\\include\\libpng16

C:\\MinGW\\msys\\1.0\\local\\include

C:\\MinGW\\msys\\1.0\\include\\libpng14

C:\\MinGW\\msys\\1.0\\include

C:\\MinGW\\msys\\1.0\\include\\libpng12

C:\\MinGW\\msys\\1.0\\include\\libpng

I'm sure I'm missing something simple, but I'm a little out of my element. I've gotten a few parts of xpdf that don't require libpng to compile but I'm completely stumped here.

Answer 1

正如Ian Abbott指出的那样，我需要将（--with-libpng-includes = DIR）和库（--with-libpng-library = PATH）参数传递到配置脚本。