--with-gd-includes="-I/foo/bar"
If you installed gd in some place where your C preprocessor can’t find the header files, use this switch to add additional -I flags.
--with-gd-libs="-L/foo/bar -labcd -lxyz"
If your copy of gd isn’t linking properly, use this to give the proper -L and -l flags to make it work. See LIBS= in gd’s Makefile.
the --with-gd switches are not necessary if you have gd 2.0.8 or higher installed properly. The gdlib-config script will be detected and used by default in that situation.
--with-ssl-includes, --with-usb-includes, --with-snmp-includes, --with-neon-includes, --with-powerman-includes="-I/foo/bar"
If your system doesn’t have pkg-config and support for any of the above libraries isn’t found (but you know it is installed), you must specify the compiler flags that are needed.
--with-ssl-libs, --with-usb-libs, --with-snmp-libs, --with-neon-libs, --with-powerman-libs="-L/foo/bar -labcd -lxyz"
If your system doesn’t have pkg-config and support for any of the above libraries isn’t found (but you know it is installed), you must specify the linker flags that are needed.