Files:
m4/exponentf.m4
m4/exponentd.m4
m4/exponentl.m4
tests/test-isinf.c
tests/infinity.h
tests/macros.h

Depends-on:
float

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

Makefile.am:
TESTS += test-isinf
check_PROGRAMS += test-isinf
test_isinf_LDADD = $(LDADD) @ISINF_LIBM@