Content of RPM xpdf-devel-4.00-6.fc28.x86_64.rpm :
/usr/include/xpdf
/usr/include/xpdf/fofi
/usr/include/xpdf/fofi/FoFiBase.h
/usr/include/xpdf/fofi/FoFiEncodings.h
/usr/include/xpdf/fofi/FoFiIdentifier.h
/usr/include/xpdf/fofi/FoFiTrueType.h
/usr/include/xpdf/fofi/FoFiType1.h
/usr/include/xpdf/fofi/FoFiType1C.h
/usr/include/xpdf/goo
/usr/include/xpdf/goo/FixedPoint.h
/usr/include/xpdf/goo/GHash.h
/usr/include/xpdf/goo/GList.h
/usr/include/xpdf/goo/GMutex.h
/usr/include/xpdf/goo/GString.h
/usr/include/xpdf/goo/gfile.h
/usr/include/xpdf/goo/gmem.h
/usr/include/xpdf/goo/gmempp.h
/usr/include/xpdf/goo/gtypes.h
/usr/include/xpdf/goo/parseargs.h
/usr/include/xpdf/splash
/usr/include/xpdf/splash/Splash.h
/usr/include/xpdf/splash/SplashBitmap.h
/usr/include/xpdf/splash/SplashClip.h
/usr/include/xpdf/splash/SplashErrorCodes.h
/usr/include/xpdf/splash/SplashFTFont.h
/usr/include/xpdf/splash/SplashFTFontEngine.h
/usr/include/xpdf/splash/SplashFTFontFile.h
/usr/include/xpdf/splash/SplashFont.h
/usr/include/xpdf/splash/SplashFontEngine.h
/usr/include/xpdf/splash/SplashFontFile.h
/usr/include/xpdf/splash/SplashFontFileID.h
/usr/include/xpdf/splash/SplashGlyphBitmap.h
/usr/include/xpdf/splash/SplashMath.h
/usr/include/xpdf/splash/SplashPath.h
/usr/include/xpdf/splash/SplashPattern.h
/usr/include/xpdf/splash/SplashScreen.h
/usr/include/xpdf/splash/SplashState.h
/usr/include/xpdf/splash/SplashTypes.h
/usr/include/xpdf/splash/SplashXPath.h
/usr/include/xpdf/splash/SplashXPathScanner.h
/usr/lib64/libfofi.so
/usr/lib64/libgoo.so
/usr/lib64/libsplash.so