Error running configure at ./autogen.sh line 207

Hi.

I write very little English, but I try to communicate with you.


when running ./autorun I get the following error:

$./autorun
Reading autogen.lastrun. Please rename it to autogen.input to avoid this 
message.
Running ./configure with '--enable-dbgutil' '--without-help' 
'--without-myspell-dicts' '--srcdir=/home/ricardo/core' 
'--enable-option-checking=fatal'
********************************************************************
*
*   Running LibreOffice build configuration.
*
********************************************************************

[...]

checking pkg-config is at least version 0.9.0... yes
checking for FONTCONFIG... no
configure: error: Package requirements (fontconfig >= 2.2.0) were not met:

No package 'fontconfig' found

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

Alternatively, you may set the environment variables FONTCONFIG_CFLAGS
and FONTCONFIG_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.
Error running configure at ./autogen.sh line 207.


The problem is that I have not the idea how to fix it.

I have fontconfig 2.10.1 and pkg-config 0.26 installed.

How do I configure FONTCONFIG_CFLAGS
and FONTCONFIG_LIBS?