Sorry, please ignore comment #1.

- Drop the obsolete prereq. (ldconfig is part of glibc which is automatically available so no buildreqs are needed for it.)

- Change devel package requires to %{name} = %{version}-%{release}.

- Use SMP make and drop optflags from make line (already put in by %configure). Make line should read
  make %{?_smp_mflags}

- Devel package needs to provide %{name}-static = %{version}-%{release}

- .la files should be removed (although this is considered an ABI change and can only be done in rawhide)

- Source url is incorrect, should be
 http://downloads.sourceforge.net/%{name}/%{name}-%{version}.tar.bz2

rpmlint output:
libieee1284.src:9: E: prereq-use /sbin/ldconfig
libieee1284-devel.x86_64: W: summary-ended-with-dot Files for developing applications that use libieee1284.
libieee1284-python.x86_64: W: no-documentation
libieee1284-python.x86_64: W: summary-ended-with-dot Python extension module for libieee1284.
5 packages and 0 specfiles checked; 1 errors, 3 warnings.

- Remove the dot and drop the prereq.

MUST: The spec file for the package is legible and macros are used consistently. OK
MUST: The package must be named according to the Package Naming Guidelines. OK
MUST: The spec file name must match the base package %{name}. OK
MUST: The package must be licensed with a Fedora approved license and meet the  Licensing Guidelines. OK
MUST: The License field in the package spec file must match the actual license. OK

MUST: The sources used to build the package must match the upstream source, as provided in the spec URL. NEEDSFIX 

MUST: The package MUST successfully compile and build into binary rpms. OK
MUST: The spec file MUST handle locales properly. OK

MUST: Optflags are used and time stamps preserved. OK
 - Use
  make DESTDIR=%{buildroot} INSTALL="install -p" install
  just to be safe.

MUST: Packages containing shared library files must call ldconfig. OK
NUST: A package must own all directories that it creates or require the package that owns the directory. OK
MUST: Files only listed once in %files listings. OK
MUST: Permissions on files must be set properly. OK
MUST: Clean section exists. OK
MUST: Large documentation files must go in a -doc subpackage. OK

MUST: All relevant items are included in %doc. Items in %doc do not affect runtime of application. NEEDSFIX
 - Include AUTHORS and NEWS to documentation.

MUST: Header files must be in a -devel package. OK
MUST: Static libraries must be in a -static package. NEEDSFIX
 - See #3.

MUST: Packages containing pkgconfig(.pc) files must 'Requires: pkgconfig'. OK
MUST: If a package contains library files with a suffix then library files ending in .so must go in a -devel package. OK

MUST: In the vast majority of cases, devel packages must require the base package using a fully versioned dependency. NEEDSFIX
MUST: Packages does not contain any .la libtool archives. NEEDSFIX

MUST: Desktop files are installed properly. OK
MUST: No file conflicts with other packages and no general names. OK
MUST: Buildroot cleaned before install. OK
SHOULD: %{?dist} tag is used in release. OK
SHOULD: If the package does not include license text(s) as separate files from upstream, the packager should query upstream to include it. OK
SHOULD: The package builds in mock. OK

Fixes made.  Thanks!

Okay, seems good.

APPROVED

PS. You can still drop the dot in the python package summary:
Summary: Python extension module for libieee1284.

Oops, missed that one, thanks.  Done.