error: Cannot find ldap.h

This error message indicates that the system is unable to locate the ldap.h header file that is required for compiling LDAP (Lightweight Directory Access Protocol) applications.

To resolve this issue, you need to install the development package for LDAP on your system, which contains the ldap.h header file. The package name may vary depending on your operating system and distribution. For example, on Ubuntu, you can install the package using the following command:

sudo apt-get install libldap2-dev

On CentOS, you can install the package using the following command:

sudo yum install openldap-devel

Once the package is installed, try compiling your LDAP application again. It should now be able to locate the ldap.h header file and compile successfully.