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19 lines
605 B
Text
19 lines
605 B
Text
# copysign.m4 serial 1
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dnl Copyright (C) 2011-2021 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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AC_DEFUN([gl_FUNC_COPYSIGN],
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[
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AC_REQUIRE([gl_MATH_H_DEFAULTS])
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dnl Determine COPYSIGN_LIBM.
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gl_MATHFUNC([copysign], [double], [(double, double)])
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if test $gl_cv_func_copysign_no_libm = no \
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&& test $gl_cv_func_copysign_in_libm = no; then
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HAVE_COPYSIGN=0
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COPYSIGN_LIBM=
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fi
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AC_SUBST([COPYSIGN_LIBM])
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])
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