1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
|
From 6dfbca78b8d253aecf9cbb5e68e04b8dd3d6a543 Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Fri, 29 Apr 2016 20:03:28 +0000
Subject: [PATCH 32/40] libgcc: Add knob to use ldbl-128 on ppc
musl does not support ldbl 128 so we can not assume
that linux as a whole supports ldbl-128 bits, instead
act upon configure option passed to gcc and assume no
on musl and yes otherwise if no option is passed since
default behaviour is to assume ldbl128 it does not
change the defaults
Upstream-Status: Pending
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
libgcc/Makefile.in | 1 +
libgcc/config/rs6000/t-linux | 5 ++++-
libgcc/configure | 18 ++++++++++++++++++
libgcc/configure.ac | 12 ++++++++++++
4 files changed, 35 insertions(+), 1 deletion(-)
mode change 100644 => 100755 libgcc/configure
diff --git a/libgcc/Makefile.in b/libgcc/Makefile.in
index dd8cee99fd3..b5f478af382 100644
--- a/libgcc/Makefile.in
+++ b/libgcc/Makefile.in
@@ -48,6 +48,7 @@ unwind_header = @unwind_header@
md_unwind_header = @md_unwind_header@
sfp_machine_header = @sfp_machine_header@
thread_header = @thread_header@
+with_ldbl128 = @with_ldbl128@
host_noncanonical = @host_noncanonical@
real_host_noncanonical = @real_host_noncanonical@
diff --git a/libgcc/config/rs6000/t-linux b/libgcc/config/rs6000/t-linux
index 4f6d4c4a4d2..c50dd94a2da 100644
--- a/libgcc/config/rs6000/t-linux
+++ b/libgcc/config/rs6000/t-linux
@@ -1,3 +1,6 @@
SHLIB_MAPFILES += $(srcdir)/config/rs6000/libgcc-glibc.ver
-HOST_LIBGCC2_CFLAGS += -mlong-double-128 -mno-minimal-toc
+ifeq ($(with_ldbl128),yes)
+HOST_LIBGCC2_CFLAGS += -mlong-double-128
+endif
+HOST_LIBGCC2_CFLAGS += -mno-minimal-toc
diff --git a/libgcc/configure b/libgcc/configure
old mode 100644
new mode 100755
index b2f3f870844..ed806587c17
--- a/libgcc/configure
+++ b/libgcc/configure
@@ -619,6 +619,7 @@ build_vendor
build_cpu
build
with_aix_soname
+with_ldbl128
enable_vtable_verify
enable_shared
libgcc_topdir
@@ -668,6 +669,7 @@ with_cross_host
with_ld
enable_shared
enable_vtable_verify
+with_long_double_128
with_aix_soname
enable_version_specific_runtime_libs
with_slibdir
@@ -1329,6 +1331,7 @@ Optional Packages:
--with-target-subdir=SUBDIR Configuring in a subdirectory for target
--with-cross-host=HOST Configuring with a cross compiler
--with-ld arrange to use the specified ld (full pathname)
+ --with-long-double-128 use 128-bit long double by default
--with-aix-soname=aix|svr4|both
shared library versioning (aka "SONAME") variant to
provide on AIX
@@ -2213,6 +2216,21 @@ fi
+# Check whether --with-long-double-128 was given.
+if test "${with_long_double_128+set}" = set; then :
+ withval=$with_long_double_128; with_ldbl128="$with_long_double_128"
+else
+ case "${host}" in
+ power*-*-musl*)
+ with_ldbl128="no";;
+ *) with_ldbl128="yes";;
+ esac
+
+fi
+
+
+
+
# Check whether --with-aix-soname was given.
if test "${with_aix_soname+set}" = set; then :
withval=$with_aix_soname; case "${host}:${enable_shared}" in
diff --git a/libgcc/configure.ac b/libgcc/configure.ac
index b59aa746afc..42220a263c5 100644
--- a/libgcc/configure.ac
+++ b/libgcc/configure.ac
@@ -78,6 +78,18 @@ AC_ARG_ENABLE(vtable-verify,
[enable_vtable_verify=no])
AC_SUBST(enable_vtable_verify)
+AC_ARG_WITH(long-double-128,
+[AS_HELP_STRING([--with-long-double-128],
+ [use 128-bit long double by default])],
+ with_ldbl128="$with_long_double_128",
+[case "${host}" in
+ power*-*-musl*)
+ with_ldbl128="no";;
+ *) with_ldbl128="yes";;
+ esac
+])
+AC_SUBST(with_ldbl128)
+
AC_ARG_WITH(aix-soname,
[AS_HELP_STRING([--with-aix-soname=aix|svr4|both],
[shared library versioning (aka "SONAME") variant to provide on AIX])],
--
2.21.0
|
