Content of RPM fftw-devel-3.3.8-12.el9.i686.rpm :
/usr/include/fftw3.f
/usr/include/fftw3.f03
/usr/include/fftw3.h
/usr/include/fftw3l.f03
/usr/include/fftw3q.f03
/usr/lib/cmake/fftw3
/usr/lib/cmake/fftw3/FFTW3Config.cmake
/usr/lib/cmake/fftw3/FFTW3ConfigVersion.cmake
/usr/lib/cmake/fftw3/FFTW3fConfig.cmake
/usr/lib/cmake/fftw3/FFTW3fConfigVersion.cmake
/usr/lib/cmake/fftw3/FFTW3lConfig.cmake
/usr/lib/cmake/fftw3/FFTW3lConfigVersion.cmake
/usr/lib/cmake/fftw3/FFTW3qConfig.cmake
/usr/lib/cmake/fftw3/FFTW3qConfigVersion.cmake
/usr/lib/libfftw3.so
/usr/lib/libfftw3_omp.so
/usr/lib/libfftw3_threads.so
/usr/lib/libfftw3f.so
/usr/lib/libfftw3f_omp.so
/usr/lib/libfftw3f_threads.so
/usr/lib/libfftw3l.so
/usr/lib/libfftw3l_omp.so
/usr/lib/libfftw3l_threads.so
/usr/lib/libfftw3q.so
/usr/lib/libfftw3q_omp.so
/usr/lib/libfftw3q_threads.so
/usr/lib/pkgconfig/fftw3.pc
/usr/lib/pkgconfig/fftw3f.pc
/usr/lib/pkgconfig/fftw3l.pc
/usr/lib/pkgconfig/fftw3q.pc
/usr/share/doc/fftw-devel
/usr/share/doc/fftw-devel/fftw-faq.html
/usr/share/doc/fftw-devel/fftw-faq.html/index.html
/usr/share/doc/fftw-devel/fftw-faq.html/section1.html
/usr/share/doc/fftw-devel/fftw-faq.html/section2.html
/usr/share/doc/fftw-devel/fftw-faq.html/section3.html
/usr/share/doc/fftw-devel/fftw-faq.html/section4.html
/usr/share/doc/fftw-devel/fftw-faq.html/section5.html
/usr/share/info/fftw3.info-1.gz
/usr/share/info/fftw3.info-2.gz
/usr/share/info/fftw3.info.gz