37 lines
1.0 KiB
Plaintext
37 lines
1.0 KiB
Plaintext
# rintf.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_RINTF],
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[
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AC_REQUIRE([gl_MATH_H_DEFAULTS])
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dnl Persuade glibc <math.h> to declare rintf().
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AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
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dnl Determine RINTF_LIBM.
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gl_MATHFUNC([rintf], [float], [(float)],
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[extern
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#ifdef __cplusplus
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"C"
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#endif
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float rintf (float);
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])
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if test $gl_cv_func_rintf_no_libm = yes \
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|| test $gl_cv_func_rintf_in_libm = yes; then
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HAVE_RINTF=1
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dnl Also check whether it's declared.
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dnl IRIX 6.5 has rintf() in libm but doesn't declare it in <math.h>.
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AC_CHECK_DECLS([rintf], , [HAVE_DECL_RINTF=0], [[#include <math.h>]])
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else
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HAVE_RINTF=0
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HAVE_DECL_RINTF=0
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RINTF_LIBM=
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fi
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AC_SUBST([RINTF_LIBM])
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])
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