/usr/include/gmp-mparam.h is missing from the gmp-devel rpm as
shipped.

The gmp package does not install a gmp-mparam.h header file by
default, nor is gmp-mparam.h covered in the gmp documentation.
The gmp package includes in several subdirectories several files
named gmp-mparam.h, but no instructions that they are anything
other than an internal header file.  If gmp is supposed to install
gmp-mparam.h, then it is a bug in gmp.  I can't tell if the gmp
maintainers consider this a bug or not, but you are welcome to
take it up with them.

Since several applications assume that the gmp source code is
installed for the express purpose of getting at gmp-mparam.h, I
decided that whether or not it is a bug in gmp, I'll fix it for
Red Hat users by putting the gmp-mparam.h file chosen at build
time in /usr/include/gmp-mparam.h

Fixed in gmp-devel-2.0.2-7.  Will not be released as an erratum
against 5.2, but will be in RawHide and subsequent official
releases.