cairo compile

["gnuplot post" <gnuplot mail gmail com>]

Hi folks,

In order to compile gtk 2.10 I need first to build pango, atk, cairo etc .

When I try to compile cairo 1.2.6  on CentOS 4.x system, I get the following error on the screen:

[jon localhost cairo-1.2.6]$ ./configure --prefix=/usr/local
......
......
checking for cairo's PNG backend... 
./configure: line 24790: --exists: command not found
./configure: line 24790: --exists: command not found
./configure: line 24790: --exists: command not found
configure: WARNING: Could not find libpng in the pkg-config search path
checking whether cairo's PNG backend could be enabled... no
configure: error: requested PNG backend could not be enabled

PKG_CONFIG_PATH variable point to /usr/local/lib/pkgconfig

[jon localhost cairo-1.2.6]$ echo $PKG_CONFIG_PATH
/usr/local/lib/pkgconfig/
[jon localhost cairo-1.2.6]$ ls -la /usr/local/lib/pkgconfig/
....
....
-rw-r--r--  1 root root  246 Feb  7 22:48 gthread-2.0.pc
-rw-r--r--  1 root root  238 Feb  7 23:56 libpng12.pc
lrwxrwxrwx  1 root root   11 Feb  7 23:56 libpng.pc -> libpng12.pc
-rw-r--r--  1 root root  291 Feb  7 23:44 pangoft2.pc


LD_LIBRARY_PATH points to /usr/local/lib

[jon localhost cairo-1.2.6]$ echo $LD_LIBRARY_PATH 
/usr/local/lib

What I am doing wrong ?

Igor