| # Copyright (C) 2002-2004, 2006-2018 Free Software Foundation, Inc. |
| # This file is free software; the Free Software Foundation |
| # gives unlimited permission to copy and/or distribute it, |
| # with or without modifications, as long as this notice is preserved. |
| |
| # Test whether the *printf family of functions supports large precisions. |
| # On mingw, precisions larger than 512 are treated like 512, in integer, |
| # floating-point or pointer output. On Solaris 10/x86, precisions larger |
| # than 510 in floating-point output crash the program. On Solaris 10/SPARC, |
| # precisions larger than 510 in floating-point output yield wrong results. |
| # On AIX 7.1, precisions larger than 998 in floating-point output yield |
| # wrong results. On BeOS, precisions larger than 1044 crash the program. |
| # Result is gl_cv_func_printf_precision. |
| |
| printf_precision_test = ''' |
| #include <stdio.h> |
| #include <string.h> |
| static char buf[5000]; |
| int main () |
| { |
| int result = 0; |
| #ifdef __BEOS__ |
| /* On BeOS, this would crash and show a dialog box. Avoid the crash. */ |
| return 1; |
| #endif |
| if (sprintf (buf, "%.4000d %d", 1, 33, 44) < 4000 + 3) |
| result |= 1; |
| if (sprintf (buf, "%.4000f %d", 1.0, 33, 44) < 4000 + 5) |
| result |= 2; |
| if (sprintf (buf, "%.511f %d", 1.0, 33, 44) < 511 + 5 |
| || buf[0] != '1') |
| result |= 4; |
| if (sprintf (buf, "%.999f %d", 1.0, 33, 44) < 999 + 5 |
| || buf[0] != '1') |
| result |= 4; |
| return result; |
| } |
| ''' |
| |
| if not meson.is_cross_build() or meson.has_exe_wrapper() |
| run_result = cc.run(printf_precision_test, |
| name : 'printf supports large precisions') |
| gl_cv_func_printf_precision = run_result.compiled() and run_result.returncode() == 0 |
| else |
| gl_cv_func_printf_precision = true |
| # Guess no only on Solaris, native Windows, and BeOS systems. |
| if (host_system == 'windows' or |
| host_system == 'beos' or |
| host_system == 'haiku' or |
| host_system == 'sunos' or |
| host_system == 'solaris') |
| gl_cv_func_printf_precision = false |
| endif |
| endif |