diff options
Diffstat (limited to 'meta/recipes-core/glibc/glibc/0032-sysdeps-ieee754-soft-fp-ignore-maybe-uninitialized-w.patch')
-rw-r--r-- | meta/recipes-core/glibc/glibc/0032-sysdeps-ieee754-soft-fp-ignore-maybe-uninitialized-w.patch | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/meta/recipes-core/glibc/glibc/0032-sysdeps-ieee754-soft-fp-ignore-maybe-uninitialized-w.patch b/meta/recipes-core/glibc/glibc/0032-sysdeps-ieee754-soft-fp-ignore-maybe-uninitialized-w.patch new file mode 100644 index 0000000000..99cd2509ec --- /dev/null +++ b/meta/recipes-core/glibc/glibc/0032-sysdeps-ieee754-soft-fp-ignore-maybe-uninitialized-w.patch | |||
@@ -0,0 +1,100 @@ | |||
1 | From 618668540e263c09b0eb28131dde7b4500158fd4 Mon Sep 17 00:00:00 2001 | ||
2 | From: Martin Jansa <Martin.Jansa@gmail.com> | ||
3 | Date: Sun, 16 Sep 2018 12:39:22 +0000 | ||
4 | Subject: [PATCH] sysdeps/ieee754/soft-fp: ignore maybe-uninitialized with -O | ||
5 | [BZ #19444] | ||
6 | |||
7 | * with -O, -O1, -Os it fails with: | ||
8 | |||
9 | In file included from ../soft-fp/soft-fp.h:318, | ||
10 | from ../sysdeps/ieee754/soft-fp/s_fdiv.c:28: | ||
11 | ../sysdeps/ieee754/soft-fp/s_fdiv.c: In function '__fdiv': | ||
12 | ../soft-fp/op-2.h:98:25: error: 'R_f1' may be used uninitialized in this function [-Werror=maybe-uninitialized] | ||
13 | X##_f0 = (X##_f1 << (_FP_W_TYPE_SIZE - (N)) | X##_f0 >> (N) \ | ||
14 | ^~ | ||
15 | ../sysdeps/ieee754/soft-fp/s_fdiv.c:38:14: note: 'R_f1' was declared here | ||
16 | FP_DECL_D (R); | ||
17 | ^ | ||
18 | ../soft-fp/op-2.h:37:36: note: in definition of macro '_FP_FRAC_DECL_2' | ||
19 | _FP_W_TYPE X##_f0 _FP_ZERO_INIT, X##_f1 _FP_ZERO_INIT | ||
20 | ^ | ||
21 | ../soft-fp/double.h:95:24: note: in expansion of macro '_FP_DECL' | ||
22 | # define FP_DECL_D(X) _FP_DECL (2, X) | ||
23 | ^~~~~~~~ | ||
24 | ../sysdeps/ieee754/soft-fp/s_fdiv.c:38:3: note: in expansion of macro 'FP_DECL_D' | ||
25 | FP_DECL_D (R); | ||
26 | ^~~~~~~~~ | ||
27 | ../soft-fp/op-2.h:101:17: error: 'R_f0' may be used uninitialized in this function [-Werror=maybe-uninitialized] | ||
28 | : (X##_f0 << (_FP_W_TYPE_SIZE - (N))) != 0)); \ | ||
29 | ^~ | ||
30 | ../sysdeps/ieee754/soft-fp/s_fdiv.c:38:14: note: 'R_f0' was declared here | ||
31 | FP_DECL_D (R); | ||
32 | ^ | ||
33 | ../soft-fp/op-2.h:37:14: note: in definition of macro '_FP_FRAC_DECL_2' | ||
34 | _FP_W_TYPE X##_f0 _FP_ZERO_INIT, X##_f1 _FP_ZERO_INIT | ||
35 | ^ | ||
36 | ../soft-fp/double.h:95:24: note: in expansion of macro '_FP_DECL' | ||
37 | # define FP_DECL_D(X) _FP_DECL (2, X) | ||
38 | ^~~~~~~~ | ||
39 | ../sysdeps/ieee754/soft-fp/s_fdiv.c:38:3: note: in expansion of macro 'FP_DECL_D' | ||
40 | FP_DECL_D (R); | ||
41 | ^~~~~~~~~ | ||
42 | |||
43 | Build tested with Yocto for ARM, AARCH64, X86, X86_64, PPC, MIPS, MIPS64 | ||
44 | with -O, -O1, -Os. | ||
45 | For AARCH64 it needs one more fix in locale for -Os. | ||
46 | |||
47 | Partial fix for [BZ #23716] | ||
48 | * sysdeps/ieee754/soft-fp/s_fdiv.c: Fix build with -O | ||
49 | |||
50 | Work around the issue instead of removing -O like we do with | ||
51 | SELECTED_OPTIMIZATION | ||
52 | |||
53 | Upstream-Status: Submitted [https://www.sourceware.org/ml/libc-alpha/2018-09/msg00300.html] | ||
54 | |||
55 | Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com> | ||
56 | --- | ||
57 | ChangeLog | 4 ++++ | ||
58 | sysdeps/ieee754/soft-fp/s_fdiv.c | 12 ++++++++++++ | ||
59 | 2 files changed, 16 insertions(+) | ||
60 | |||
61 | diff --git a/ChangeLog b/ChangeLog | ||
62 | index 922e916f2c..216336edc9 100644 | ||
63 | --- a/ChangeLog | ||
64 | +++ b/ChangeLog | ||
65 | @@ -1,3 +1,7 @@ | ||
66 | +2018-09-30 Martin Jansa <Martin.Jansa@gmail.com> | ||
67 | + Partial fix for [BZ #23716] | ||
68 | + * sysdeps/ieee754/soft-fp/s_fdiv.c: Fix build with -O. | ||
69 | + | ||
70 | 2018-09-29 Martin Jansa <Martin.Jansa@gmail.com> | ||
71 | Partial fix for [BZ #23716] | ||
72 | * sysdeps/ieee754/dbl-96/e_jnl.c: Fix build with -O | ||
73 | diff --git a/sysdeps/ieee754/soft-fp/s_fdiv.c b/sysdeps/ieee754/soft-fp/s_fdiv.c | ||
74 | index 341339f5ed..14655b77da 100644 | ||
75 | --- a/sysdeps/ieee754/soft-fp/s_fdiv.c | ||
76 | +++ b/sysdeps/ieee754/soft-fp/s_fdiv.c | ||
77 | @@ -25,6 +25,16 @@ | ||
78 | #undef fdivl | ||
79 | |||
80 | #include <math-narrow.h> | ||
81 | + | ||
82 | +#include <libc-diag.h> | ||
83 | +/* R_f[01] are not set in cases where it is not used in packing, but the | ||
84 | + compiler does not see that it is set in all cases where it is | ||
85 | + used, resulting in warnings that it may be used uninitialized. | ||
86 | + The location of the warning differs in different versions of GCC, | ||
87 | + it may be where R is defined using a macro or it may be where the | ||
88 | + macro is defined. */ | ||
89 | +DIAG_PUSH_NEEDS_COMMENT; | ||
90 | +DIAG_IGNORE_NEEDS_COMMENT (8, "-Wmaybe-uninitialized"); | ||
91 | #include <soft-fp.h> | ||
92 | #include <single.h> | ||
93 | #include <double.h> | ||
94 | @@ -53,4 +63,6 @@ __fdiv (double x, double y) | ||
95 | CHECK_NARROW_DIV (ret, x, y); | ||
96 | return ret; | ||
97 | } | ||
98 | +DIAG_POP_NEEDS_COMMENT; | ||
99 | + | ||
100 | libm_alias_float_double (div) | ||