MariaDB does not make full use of pkgconfig

Hi.

This problem i had also in previous releases.

I've installed openssl, pcre2, curl, zlib, ncurses ect. from source.
My installation structure is "/own/dep/..."

The .pc-files (PKG-Config) are in /usr/share/pkgconfig and if i test each of them with pkg-config (e.g "pkg-config zlib --libs / --cflags") all is fine.

For compiling mariadb i set the cmake-options:

• -DWITH_ZLIB=system
• -DWITH_LIBFMT=system
• -DWITH_PCRE=system
• ...

but zlib, libfmt, pcre2-8 and ncurses are not found:

Could NOT find ZLIB (missing: ZLIB_LIBRARY ZLIB_INCLUDE_DIR)

...

CMake Error at /usr/share/cmake-3.22/Modules/FindPackageHandleStandardArgs.cmake:230 (message):

  Could NOT find Curses (missing: CURSES_LIBRARY CURSES_INCLUDE_PATH)

...

CMake Error at cmake/pcre.cmake:84 (MESSAGE):

  system pcre2-8 library is not found or unusable

Why mariadb doesn't find these packages while others like openssl and curl are found?

The output of pkg-config (libdir | includedir | libs | cflags):

zlib:
====================================

• /own/dep/zlib/lib
• /own/dep/zlib/include
• -L/own/dep/zlib/lib -lz
• -I/own/dep/zlib/include
  ====================================

fmt:
====================================

• /own/dep/libfmt/lib
• /own/dep/libfmt/include
• -L/own/dep/libfmt/lib -lfmt
• -I/own/dep/libfmt/include
  ====================================

ncurses:
====================================

• /own/dep/libncurses/lib
• /own/dep/libncurses/include/ncurses
• -L/own/dep/pcre2/lib -lncurses -lpcre2-posix
• -D_DEFAULT_SOURCE -D_XOPEN_SOURCE=600 -I/own/dep/libncurses/include/ncurses -I/own/dep/libncurses/include
  ====================================

libpcre2-8 / libpcre2-posix
====================================

• /own/dep/pcre2/lib
• /own/dep/pcre2/include
• -L/own/dep/pcre2/lib -lpcre2-8 / -lpcre2-posix
• -I/own/dep/pcre2/include
  ====================================

I know that i can use additional options like -DZLIB_... or -DCURSES_...

But why, as i said mariadb found openssl and curl with pkg-config but not the others?

Other programs like nginx and php found all of them!