Build fails first time due to libpcre

[dashxdr]

Build DBus gattlib for Bluez v5.66
-- Checking for one of the modules 'libpcre'
CMake Error at /usr/share/cmake-3.25/Modules/FindPkgConfig.cmake:894 (message):
None of the required 'libpcre' found
Call Stack (most recent call first):
examples/ble_scan/CMakeLists.txt:27 (pkg_search_module)

This is when I do
mkdir build && cd build && cmake ..
The system has no previously installed gattlib.

I fixed it by changing the top level CMakeLists.txt:
option(GATTLIB_BUILD_EXAMPLES "Build GattLib examples" NO)
(The option was YES)
This lets me do the "cmake .." step and then make && make install
Then I can change that back to YES and everything is fine