28 lines
913 B
Plaintext
28 lines
913 B
Plaintext
# fabsf.m4
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# serial 3
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dnl Copyright (C) 2011-2024 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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dnl This file is offered as-is, without any warranty.
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AC_DEFUN([gl_FUNC_FABSF],
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[
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AC_REQUIRE([gl_MATH_H_DEFAULTS])
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AC_REQUIRE([gl_FUNC_FABS])
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dnl Persuade glibc <math.h> to declare fabsf().
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AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
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dnl Test whether fabsf() exists. We cannot assume that fabsf(), if it
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dnl exists, is defined in the same library as fabs(). This is not the case
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dnl on FreeBSD, NetBSD, OpenBSD.
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gl_MATHFUNC([fabsf], [float], [(float)])
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if test $gl_cv_func_fabsf_no_libm = no \
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&& test $gl_cv_func_fabsf_in_libm = no; then
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HAVE_FABSF=0
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FABSF_LIBM="$FABS_LIBM"
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fi
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AC_SUBST([FABSF_LIBM])
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])
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