Files:
tests/test-signbit.c
m4/isnanf.m4
m4/isnan.m4
m4/isnanl.m4

Depends-on:

configure.ac:
AC_REQUIRE([gl_FLOAT_EXPONENT_LOCATION])
AC_REQUIRE([gl_DOUBLE_EXPONENT_LOCATION])
AC_REQUIRE([gl_LONG_DOUBLE_EXPONENT_LOCATION])

Makefile.am:
TESTS += test-signbit
check_PROGRAMS += test-signbit