When compiling PHP, i get following error.
checking whether to enable internationalization support… yes
checking for icu-config… no
checking for location of ICU headers and libraries… not found
configure: error: Unable to detect ICU prefix or no failed. Please verify ICU install prefix and make sure icu-config works.
To fix, install libicu dev package.
On CentOS/RHEL
yum -y install libicu-devel
On Debian/Ubuntu
apt -y install libicu-dev