mirror of https://gitee.com/openkylin/glib2.0.git
55 lines
1.9 KiB
Meson
55 lines
1.9 KiB
Meson
# Copyright (C) 2002-2004, 2006-2018 Free Software Foundation, Inc.
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# This file is free software; the Free Software Foundation
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# gives unlimited permission to copy and/or distribute it,
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# with or without modifications, as long as this notice is preserved.
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# Test whether the *printf family of functions supports large precisions.
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# On mingw, precisions larger than 512 are treated like 512, in integer,
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# floating-point or pointer output. On Solaris 10/x86, precisions larger
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# than 510 in floating-point output crash the program. On Solaris 10/SPARC,
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# precisions larger than 510 in floating-point output yield wrong results.
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# On AIX 7.1, precisions larger than 998 in floating-point output yield
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# wrong results. On BeOS, precisions larger than 1044 crash the program.
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# Result is gl_cv_func_printf_precision.
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printf_precision_test = '''
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#include <stdio.h>
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#include <string.h>
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static char buf[5000];
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int main ()
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{
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int result = 0;
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#ifdef __BEOS__
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/* On BeOS, this would crash and show a dialog box. Avoid the crash. */
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return 1;
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#endif
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if (sprintf (buf, "%.4000d %d", 1, 33, 44) < 4000 + 3)
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result |= 1;
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if (sprintf (buf, "%.4000f %d", 1.0, 33, 44) < 4000 + 5)
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result |= 2;
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if (sprintf (buf, "%.511f %d", 1.0, 33, 44) < 511 + 5
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|| buf[0] != '1')
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result |= 4;
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if (sprintf (buf, "%.999f %d", 1.0, 33, 44) < 999 + 5
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|| buf[0] != '1')
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result |= 4;
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return result;
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}
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'''
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if meson.can_run_host_binaries()
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run_result = cc.run(printf_precision_test,
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name : 'printf supports large precisions')
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gl_cv_func_printf_precision = run_result.compiled() and run_result.returncode() == 0
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else
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gl_cv_func_printf_precision = true
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# Guess no only on Solaris, native Windows, and BeOS systems.
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if (host_system == 'windows' or
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host_system == 'beos' or
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host_system == 'haiku' or
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host_system == 'sunos' or
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host_system == 'solaris')
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gl_cv_func_printf_precision = false
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endif
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endif
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