gcc: Fix ldbl-128 support for musl

Let the patch trigger based on target triplet instead of passing via
configure, this lets gcc compile for 64bit otherwise it ends up with
libgcc  build errors

error: unable to emulate 'TF'

(From OE-Core rev: 2259bf5366a9ff654dfaf15baa5df2d943383ce6)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

3 files changed, 66 insertions, 120 deletions

diff --git a/meta/recipes-devtools/gcc/gcc-9.2/0030-libgcc-Add-knob-to-use-ldbl-128-on-ppc.patch b/meta/recipes-devtools/gcc/gcc-9.2/0030-libgcc-Add-knob-to-use-ldbl-128-on-ppc.patch
index f5769bc8e9..38eab5a083 100644
--- a/meta/recipes-devtools/gcc/gcc-9.2/0030-libgcc-Add-knob-to-use-ldbl-128-on-ppc.patch
+++ b/meta/recipes-devtools/gcc/gcc-9.2/0030-libgcc-Add-knob-to-use-ldbl-128-on-ppc.patch
@@ -1,125 +1,79 @@
-From baab61ae3938ee2fa9ec03a20793508516a46dae 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 30/36] 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
+From 47467f3ab0fb2f2fcede81060fe8bb339d0909eb Mon Sep 17 00:00:00 2001
+From: Szabolcs Nagy <nsz@port70.net>
+Date: Wed, 28 Feb 2018 00:54:05 +0000
+Subject: [PATCH 10/12] ldbl128 config
 
 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
+ gcc/configure    | 13 +++++++++++++
+ gcc/configure.ac | 16 ++++++++++++++--
+ 2 files changed, 27 insertions(+), 2 deletions(-)
 
-diff --git a/libgcc/Makefile.in b/libgcc/Makefile.in
-index ea390a5bbea..114c7876304 100644
---- a/libgcc/Makefile.in
-+++ b/libgcc/Makefile.in
-@@ -50,6 +50,7 @@ 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 36dbbc1f699..b5dd5c34e2a
---- a/libgcc/configure
-+++ b/libgcc/configure
-@@ -651,6 +651,7 @@ build_vendor
- build_cpu
- build
- with_aix_soname
-+with_ldbl128
- enable_vtable_verify
- enable_gcov
- enable_shared
-@@ -702,6 +703,7 @@ with_ld
- enable_shared
- enable_gcov
- enable_vtable_verify
-+with_long_double_128
- with_aix_soname
- enable_version_specific_runtime_libs
- with_slibdir
-@@ -1363,6 +1365,7 @@ 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
-@@ -2268,6 +2271,21 @@ fi
- 
- 
+diff --git a/gcc/configure b/gcc/configure
+index 6121e163259..07ff8597d48 100755
+--- a/gcc/configure
++++ b/gcc/configure
+@@ -29309,6 +29309,15 @@ if test "${with_long_double_128+set}" = set; then :
+   withval=$with_long_double_128; gcc_cv_target_ldbl128="$with_long_double_128"
+ else
  
-+# 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
-+
++      case "$target" in
++       s390*-*-linux-musl*)
++         gcc_cv_target_ldbl128=yes
++         ;;
++       powerpc*-*-linux-musl*)
++         gcc_cv_target_ldbl128=no
++         ;;
++       *)
 +
+ if test $glibc_version_major -gt 2 \
+   || ( test $glibc_version_major -eq 2 && test $glibc_version_minor -ge 4 ); then :
+   gcc_cv_target_ldbl128=yes
+@@ -29320,6 +29329,10 @@ else
+       && gcc_cv_target_ldbl128=yes
+ 
+ fi
 +
++         ;;
++      esac
 +
- # Check whether --with-aix-soname was given.
- if test "${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 8e96cafdf8b..9247856bf24 100644
---- a/libgcc/configure.ac
-+++ b/libgcc/configure.ac
-@@ -82,6 +82,18 @@ AC_ARG_ENABLE(vtable-verify,
- [enable_vtable_verify=no])
- AC_SUBST(enable_vtable_verify)
+ fi
  
-+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])],
+     ;;
+diff --git a/gcc/configure.ac b/gcc/configure.ac
+index b066cc609e1..6c15ed898c0 100644
+--- a/gcc/configure.ac
++++ b/gcc/configure.ac
+@@ -5971,13 +5971,25 @@ case "$target" in
+     AC_ARG_WITH(long-double-128,
+       [AS_HELP_STRING([--with-long-double-128],
+                      [use 128-bit long double by default])],
+-      gcc_cv_target_ldbl128="$with_long_double_128",
++      gcc_cv_target_ldbl128="$with_long_double_128", [
++      case "$target" in
++       s390*-*-linux-musl*)
++         gcc_cv_target_ldbl128=yes
++         ;;
++       powerpc*-*-linux-musl*)
++         gcc_cv_target_ldbl128=no
++         ;;
++       *)]
+       [GCC_GLIBC_VERSION_GTE_IFELSE([2], [4], [gcc_cv_target_ldbl128=yes], [
+       [gcc_cv_target_ldbl128=no
+       grep '^[         ]*#[    ]*define[       ][      ]*__LONG_DOUBLE_MATH_OPTIONAL' \
+         $target_header_dir/bits/wordsize.h > /dev/null 2>&1 \
+       && gcc_cv_target_ldbl128=yes
+-      ]])])
++      ]])]
++      [
++         ;;
++      esac
++      ])
+     ;;
+ esac
+ if test x$gcc_cv_target_ldbl128 = xyes; then
 -- 
-2.22.1
+2.17.1
 
diff --git a/meta/recipes-devtools/gcc/gcc-common.inc b/meta/recipes-devtools/gcc/gcc-common.inc
index 96334e54b4..89273a7745 100644
--- a/meta/recipes-devtools/gcc/gcc-common.inc
+++ b/meta/recipes-devtools/gcc/gcc-common.inc
@@ -41,13 +41,6 @@ def get_gcc_ppc_plt_settings(bb, d):
         return "--enable-secureplt"
     return ""
 
-def get_long_double_setting(bb, d):
-    if d.getVar('TRANSLATED_TARGET_ARCH') in [ 'powerpc', 'powerpc64' ] and d.getVar('TCLIBC') in [ 'glibc' ]:
-        return "--with-long-double-128"
-    else:
-        return "--without-long-double-128 libgcc_cv_powerpc_float128=no"
-    return ""
-
 def get_gcc_multiarch_setting(bb, d):
     target_arch = d.getVar('TRANSLATED_TARGET_ARCH')
     multiarch_options = {
diff --git a/meta/recipes-devtools/gcc/gcc-configure-common.inc b/meta/recipes-devtools/gcc/gcc-configure-common.inc
index b6f2ca541d..24ba8ce75f 100644
--- a/meta/recipes-devtools/gcc/gcc-configure-common.inc
+++ b/meta/recipes-devtools/gcc/gcc-configure-common.inc
@@ -36,7 +36,6 @@ EXTRA_OECONF = "\
     ${EXTRA_OECONF_PATHS} \
     ${@get_gcc_mips_plt_setting(bb, d)} \
     ${@get_gcc_ppc_plt_settings(bb, d)} \
-    ${@get_long_double_setting(bb, d)} \
     ${@get_gcc_multiarch_setting(bb, d)} \
 "