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dnl Copyright (C) 2011-2023 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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