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a65fa9a33f
Otherwise, `CFLAGS='-Wall -Werror' meson build` fails with:
...
Command line: `cc ./glib/build/meson-private/tmp7iwplrgi/testfile.c -o ./glib/build/meson-private/tmp7iwplrgi/output.obj -c -O3 -Werror -Wall -D_FILE_OFFSET_BITS=64 -O0 -std=gnu99` -> 1
stderr:
./glib/build/meson-private/tmp7iwplrgi/testfile.c: In function 'main':
./glib/build/meson-private/tmp7iwplrgi/testfile.c:83:21: error: unused variable 'y' [-Werror=unused-variable]
83 | long double y = frexpl (x, &exp);
| ^
cc1: all warnings being treated as errors
-----------
Checking if "frexpl prototype can be re-listed" compiles: NO
glib/gnulib/meson.build:316:2: ERROR: Problem encountered: frexpl() is missing or broken beyond repair, and we have nothing to replace it with
143 lines
3.9 KiB
Meson
143 lines
3.9 KiB
Meson
# Copyright (C) 2007-2018 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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frexpl_test = '''
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#include <float.h>
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#include <math.h>
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/* Override the values of <float.h>, like done in float.in.h. */
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#if defined __i386__ && (defined __BEOS__ || defined __OpenBSD__)
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# undef LDBL_MIN_EXP
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# define LDBL_MIN_EXP (-16381)
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#endif
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#if defined __i386__ && (defined __FreeBSD__ || defined __DragonFly__)
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# undef LDBL_MIN_EXP
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# define LDBL_MIN_EXP (-16381)
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#endif
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#if (defined _ARCH_PPC || defined _POWER) && defined _AIX && (LDBL_MANT_DIG == 106) && defined __GNUC__
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# undef LDBL_MIN_EXP
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# define LDBL_MIN_EXP DBL_MIN_EXP
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#endif
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#if defined __sgi && (LDBL_MANT_DIG >= 106)
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# if defined __GNUC__
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# undef LDBL_MIN_EXP
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# define LDBL_MIN_EXP DBL_MIN_EXP
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# endif
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#endif
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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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#if !defined (_MSC_VER) || defined (TEST_FREXPL_DECL)
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long double frexpl (long double, int *);
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#endif
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int main()
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{
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int result = 0;
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volatile long double x;
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/* Test on finite numbers that fails on AIX 5.1. */
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x = 16.0L;
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{
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int exp = -9999;
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frexpl (x, &exp);
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if (exp != 5)
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result |= 1;
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}
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/* Test on finite numbers that fails on Mac OS X 10.4, because its frexpl
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function returns an invalid (incorrectly normalized) value: it returns
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y = { 0x3fe028f5, 0xc28f5c28, 0x3c9eb851, 0xeb851eb8 }
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but the correct result is
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0.505L = { 0x3fe028f5, 0xc28f5c29, 0xbc547ae1, 0x47ae1480 } */
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x = 1.01L;
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{
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int exp = -9999;
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long double y = frexpl (x, &exp);
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if (!(exp == 1 && y == 0.505L))
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result |= 2;
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}
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/* Test on large finite numbers. This fails on BeOS at i = 16322, while
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LDBL_MAX_EXP = 16384.
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In the loop end test, we test x against Infinity, rather than comparing
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i with LDBL_MAX_EXP, because BeOS <float.h> has a wrong LDBL_MAX_EXP. */
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{
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int i;
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for (i = 1, x = 1.0L; x != x + x; i++, x *= 2.0L)
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{
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int exp = -9999;
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frexpl (x, &exp);
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if (exp != i)
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{
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result |= 4;
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break;
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}
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}
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}
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/* Test on denormalized numbers. */
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{
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int i;
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for (i = 1, x = 1.0L; i >= LDBL_MIN_EXP; i--, x *= 0.5L)
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;
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if (x > 0.0L)
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{
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int exp;
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long double y = frexpl (x, &exp);
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/* On machines with IEEE854 arithmetic: x = 1.68105e-4932,
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exp = -16382, y = 0.5. On Mac OS X 10.5: exp = -16384, y = 0.5. */
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(void) y;
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if (exp != LDBL_MIN_EXP - 1)
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result |= 8;
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}
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}
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/* Test on infinite numbers. */
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/* The dance around 0.0L is an attempt to prevent MSVC from erroring out */
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x = 0.0L;
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x = 1.0L / x;
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{
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int exp;
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long double y = frexpl (x, &exp);
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if (y != x)
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result |= 16;
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}
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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(frexpl_test,
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name : 'frexpl works',
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dependencies : [libm])
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rc = run_result.returncode()
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gl_cv_func_frexpl_works = run_result.compiled() and rc == 0
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gl_cv_func_frexpl_broken_beyond_repair = not gl_cv_func_frexpl_works
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# bit 1 is not set
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if (rc == 16)
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gl_cv_func_frexpl_broken_beyond_repair = false
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else
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gl_cv_func_frexpl_broken_beyond_repair = true
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endif
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else
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if (host_system.startswith ('aix') or
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host_system.startswith ('beos') or
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host_system.startswith ('irix'))
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gl_cv_func_frexpl_works = false
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gl_cv_func_frexpl_broken_beyond_repair = true
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elif (host_system == 'windows')
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gl_cv_func_frexpl_works = false
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gl_cv_func_frexpl_broken_beyond_repair = false
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else
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gl_cv_func_frexpl_works = true
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gl_cv_func_frexpl_broken_beyond_repair = false
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endif
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endif
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frexpl_test_decl = '''
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#define TEST_FREXPL_DECL 1
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''' + frexpl_test
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build_result = cc.compiles(frexpl_test_decl,
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name : 'frexpl prototype can be re-listed')
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gl_cv_func_frexpl_decl = build_result
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