2 log10l() function: base 10 logarithmic function.
10 log10 [test $HAVE_LOG10L = 0 && test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1]
11 logl [test $HAVE_LOG10L = 0 && test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 0]
15 if test $HAVE_LOG10L = 0; then
18 gl_MATH_MODULE_INDICATOR([log10l])