clog2(3) Library Functions Manual clog2(3) clog2, clog2f, clog2l - 2 (libm, -lm) #include double complex clog2(double complex z); float complex clog2f(float complex z); long double complex clog2l(long double complex z); clog2(z) clog(z)/log(2). float long double. , z, , . . C99. Not yet in glibc, as at glibc 2.19. cabs(3), cexp(3), clog(3), clog10(3), complex(7) () Azamat Hackimov , Dmitriy S. Seregin , Dmitry Bolkhovskikh , Katrin Kutepova , Yuri Kozlov ; GNU (GNU General Public License - GPL, 3 ) , - . - , , () () () . Linux man-pages 6.18 8 2026 . clog2(3)