26 lines
898 B
Plaintext
26 lines
898 B
Plaintext
# rint.m4
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# serial 4
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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_RINT],
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[
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AC_REQUIRE([gl_MATH_H_DEFAULTS])
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dnl Determine RINT_LIBM.
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dnl The reason for the extra code is:
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dnl In AIX 7.1 with gcc 4.2, when optimization is turned on, calls to
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dnl rint() with simple arguments are turned into rintf() calls by the
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dnl compiler. But while rint() is resides in libc, rintf() is in libm.
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gl_MATHFUNC([rint], [double], [(double)], [], [y += rint (2.0);])
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if test $gl_cv_func_rint_no_libm = no \
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&& test $gl_cv_func_rint_in_libm = no; then
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HAVE_RINT=0
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RINT_LIBM=
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fi
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AC_SUBST([RINT_LIBM])
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])
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