Compiling for PNG support

[tarmes]

Hi,

I'm trying to add support for the ImagePng command in PHP. I have PHP version 4.2.3 and I am configuring it with the following parameters:

./configure --with-mysql --with-apxs=/www/bin/apxs --enable-track-vars --with-gd=/usr/local/gd-1.8.4 --with-freetype-dir=/usr/l
ocal/freetype-2.1.2 --with-zlib-dir=/usr/local/zlib-1.1.4 --with-png-dir=/usr/local/libpng-1.2.5

The compilation works fine, and I've restarted the server etc. PHP reports that GD is linked in with freetype and WBMP support. No mention is made of PNG, but then I don't know if it would mention it.

When I try a script that uses the imagepng command I get the following error:

Call to undefined function: imagepng()

I've run the 'gddemo' program and that creates a Png without any problems.

Can anyone shed some light on the problem?

Thanks,

Tim

[MarkE]

Tim,

this is my LOCAL "road map" to image creation. Please note that you will need to correct all paths etc to your situation! ive listed all the steps i took when compiling. i've discovered the order of steps taken is very important

[1] LIBPNG
cd libpng
cp scripts/makefile.linux ./Makefile
make
make install

[2] LIBJPEG
cd libjpeg
./configure
make
make test
make install
make install-lib
make install-headers

[3] ZLIB
cd zlib
./configure
make test
make install

[4] GD 
cd gd
edit Makefile:   CFLAGS=-O -DHAVE_LIBPNG -DHAVE_LIBJPEG
          	        LIBS=-lgd -lpng -lz -ljpeg -lm
make distclean
make
make install

[6]  APACHE
cd apache_1.3.26
./ configure

[7] PHP
make distclean
./configure 
	--with-apache=../apache_1.3.26 
	--with-mysql=/r/mysql 
	--with-config-file-path=/r/php 
	--prefix=/r/php 
	--with-gd 
	--with-jpeg-dir 
	--with-png-dir 
	--with-zlib-dir 
	--enable-gd-native-tt 			
// optional...
	--enable-gd-imgstrttf  			
// optional...
	--with-freetype-dir=/usr/local/include/freetype2 	
// optional...
	--enable-tracking-vars 
make
make install

[8] APACHE
cd apache_xxxx
./configure
	--prefix=/r/apache
	--activate-module=src/modules/php4/libphp4.a
make

/r/apache/bin/apachectl stop
cp src/httpd /r/apache/bin/httpd	  (overwrite: YES)
/r/apache/bin/apachectl start

[tarmes]

Hi,

I've discovered that the problem was quite subtle. PHP was initially compliled with PNG support, and this fact gets remembered in a file called cache.conf. When reconfiguring, the check for gdCreateImageFromPng wasn't run, instead the previously cached result was used.

I removed this line from the cached results and all is well,

Thanks,

Tim