2 log2() function: base 2 logarithm.
12 isnand [test $HAVE_LOG2 = 0 || test $REPLACE_LOG2 = 1]
13 frexp [test $HAVE_LOG2 = 0 || test $REPLACE_LOG2 = 1]
14 log [test $HAVE_LOG2 = 0 || test $REPLACE_LOG2 = 1]
18 if test $HAVE_LOG2 = 0 || test $REPLACE_LOG2 = 1; then
21 gl_MATH_MODULE_INDICATOR([log2])