Debian: gcc: add support for ARC

[Vineet Gupta <Vineet.Gupta1@synopsys.com>]

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Missed attaching patches in original report.

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[-- Attachment #2: 0001-ARC-upstream-gcc-driver-default-to-hard-float.patch --]
[-- Type: text/x-patch; name="0001-ARC-upstream-gcc-driver-default-to-hard-float.patch", Size: 1814 bytes --]

From b2bb3ff341a43a1abe033daa9d6fbf8bb6f86fab Mon Sep 17 00:00:00 2001
From: Vineet Gupta <vgupta@synopsys.com>
Date: Wed, 3 Mar 2021 16:36:44 -0500
Subject: [PATCH 1/4] ARC/upstream: gcc driver default to hard-float

This change is already merged in mainline gcc as of 2021-06-02
commit 46d04271a498 "ARC: gcc driver default to hs38_linux"

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---
 debian/patches/arc-hf-default.diff | 18 ++++++++++++++++++
 debian/rules.patch                 |  1 +
 2 files changed, 19 insertions(+)
 create mode 100755 debian/patches/arc-hf-default.diff

diff --git a/debian/patches/arc-hf-default.diff b/debian/patches/arc-hf-default.diff
new file mode 100755
index 000000000000..d162d20d9ec3
--- /dev/null
+++ b/debian/patches/arc-hf-default.diff
@@ -0,0 +1,18 @@
+#DP: build for hf as default (implied by -mcpu=hs38_linux)
+
+---
+ gcc/config/arc/arc.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/src/gcc/config/arc/arc.h
++++ b/src/gcc/config/arc/arc.h
+@@ -34,7 +34,7 @@ along with GCC; see the file COPYING3.  If not see
+ #define SYMBOL_FLAG_CMEM	(SYMBOL_FLAG_MACH_DEP << 3)
+ 
+ #ifndef TARGET_CPU_DEFAULT
+-#define TARGET_CPU_DEFAULT	PROCESSOR_arc700
++#define TARGET_CPU_DEFAULT	PROCESSOR_hs38_linux
+ #endif
+ 
+ /* Check if this symbol has a long_call attribute in its declaration */
+
diff --git a/debian/rules.patch b/debian/rules.patch
index c4ae7a04c1a2..65fcbf8e4087 100644
--- a/debian/rules.patch
+++ b/debian/rules.patch
@@ -83,6 +83,7 @@ debian_patches += \
 	pr97250-3 \
 	pr97250-4 \
 	pr97714 \
+	arc-hf-default \
 
 ifneq (,$(filter $(distrelease),wheezy jessie stretch buster lucid precise trusty xenial bionic cosmic disco eoan))
   debian_patches += pr85678-revert
-- 
2.25.1


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[-- Attachment #3: 0002-ARC-debian-rules2-gcc-disable-multilib.patch --]
[-- Type: text/x-patch; name="0002-ARC-debian-rules2-gcc-disable-multilib.patch", Size: 892 bytes --]

From c42aba1683087c2287f4f289270207ebe24e4a7f Mon Sep 17 00:00:00 2001
From: Vineet Gupta <vgupta@synopsys.com>
Date: Wed, 24 Mar 2021 16:37:01 -0700
Subject: [PATCH 2/4] ARC/debian/rules2: gcc disable multilib

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---
 debian/rules2 | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/debian/rules2 b/debian/rules2
index 6a402f086592..cb07b861a35f 100644
--- a/debian/rules2
+++ b/debian/rules2
@@ -533,6 +533,10 @@ ifneq (,$(findstring riscv64-linux,$(DEB_TARGET_GNU_TYPE)))
   CONFARGS += --with-arch=rv64imafdc --with-abi=lp64d
 endif
 
+ifneq (,$(findstring arc-linux,$(DEB_TARGET_GNU_TYPE)))
+  CONFARGS += --disable-multilib
+endif
+
 ifneq (,$(findstring s390x-linux,$(DEB_TARGET_GNU_TYPE)))
   ifeq ($(derivative),Ubuntu)
     ifneq (,$(filter $(distrelease),xenial bionic disco eoan focal))
-- 
2.25.1


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[-- Attachment #4: 0003-ARC-debian-gcc-defines-for-multilib-multiarch-enabli.patch --]
[-- Type: text/x-patch; name="0003-ARC-debian-gcc-defines-for-multilib-multiarch-enabli.patch", Size: 1794 bytes --]

From fd969fd2af9a7d97f8ac6762ccb621380ea15943 Mon Sep 17 00:00:00 2001
From: Vineet Gupta <vgupta@synopsys.com>
Date: Fri, 26 Mar 2021 14:46:54 -0700
Subject: [PATCH 3/4] ARC/debian: gcc: defines for multilib/multiarch enabling

This is equivalent of following for arc
 - debian/patches/gcc-multiarch.diff
 - debian/patches/gcc-multilib-multiarch.diff

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---
 debian/patches/gcc-multiarch-arc.diff | 12 ++++++++++++
 debian/rules.patch                    |  2 +-
 2 files changed, 13 insertions(+), 1 deletion(-)
 create mode 100644 debian/patches/gcc-multiarch-arc.diff

diff --git a/debian/patches/gcc-multiarch-arc.diff b/debian/patches/gcc-multiarch-arc.diff
new file mode 100644
index 000000000000..936883ae2285
--- /dev/null
+++ b/debian/patches/gcc-multiarch-arc.diff
@@ -0,0 +1,12 @@
+DP: ARC: inhibit multilibs, define MULTILIB_OSDIRNAMES/MULTIARCH_DIRNAME
+
+---
+--- a/src/gcc/config/arc/t-multilib-linux
++++ b/src/gcc/config/arc/t-multilib-linux
+@@ -23,3 +23,6 @@ MULTILIB_DIRNAMES = hs archs hs38 hs38_linux arc700 nps400
+ # Aliases:
+ MULTILIB_MATCHES += mcpu?arc700=mA7
+ MULTILIB_MATCHES += mcpu?arc700=mARC700
++
++MULTILIB_OSDIRNAMES =
++MULTIARCH_DIRNAME = $(call if_multiarch,arc-linux-gnu)
diff --git a/debian/rules.patch b/debian/rules.patch
index 65fcbf8e4087..5c8aa1cd90f7 100644
--- a/debian/rules.patch
+++ b/debian/rules.patch
@@ -228,7 +228,7 @@ ifeq (,$(filter 2.1%, $(shell dpkg-query -l libc-bin | awk '/^.i/ {print $$3}'))
   #debian_patches += pr67899
 endif
 
-debian_patches += gcc-multiarch
+debian_patches += gcc-multiarch gcc-multiarch-arc
 debian_patches += config-ml
 ifneq ($(single_package),yes)
   ifeq ($(with_multiarch_cxxheaders),yes)
-- 
2.25.1


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[-- Attachment #5: 0004-ARC-debian-gcc-add-build-toogles-as-for-other-arches.patch --]
[-- Type: text/x-patch; name="0004-ARC-debian-gcc-add-build-toogles-as-for-other-arches.patch", Size: 1823 bytes --]

From 34ee1efe6c89da1b021f355382b94c909480d079 Mon Sep 17 00:00:00 2001
From: Vineet Gupta <vgupta@synopsys.com>
Date: Thu, 1 Apr 2021 14:57:49 -0700
Subject: [PATCH 4/4] ARC/debian: gcc: add build toogles as for other arches

This is equivalent of following for arc
- debian/patches/gcc-hash-style-gnu.diff
- debian/patches/gcc-as-needed.diff

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---
 debian/patches/gcc-hash-style-gnu-arc.diff | 17 +++++++++++++++++
 debian/rules.patch                         |  1 +
 2 files changed, 18 insertions(+)
 create mode 100644 debian/patches/gcc-hash-style-gnu-arc.diff

diff --git a/debian/patches/gcc-hash-style-gnu-arc.diff b/debian/patches/gcc-hash-style-gnu-arc.diff
new file mode 100644
index 000000000000..dae6d77198b1
--- /dev/null
+++ b/debian/patches/gcc-hash-style-gnu-arc.diff
@@ -0,0 +1,17 @@
+#DP: Add updates for ARC as needed for other arches
+
+ - debian/patches/gcc-hash-style-gnu.diff
+ - debian/patches/gcc-as-needed.diff
+
+---
+--- a/src/gcc/config/arc/linux.h
++++ b/src/gcc/config/arc/linux.h
+@@ -37,6 +37,8 @@ along with GCC; see the file COPYING3.  If not see
+    available.  Override with -static.  */
+ #undef LINK_SPEC
+ #define LINK_SPEC "%{h*} \
++  -hash-style=gnu   \
++  -as-needed        \
+   %{static:-Bstatic} \
+   %{shared:-shared} \
+   %{symbolic:-Bsymbolic} \
diff --git a/debian/rules.patch b/debian/rules.patch
index 5c8aa1cd90f7..f00699636c10 100644
--- a/debian/rules.patch
+++ b/debian/rules.patch
@@ -84,6 +84,7 @@ debian_patches += \
 	pr97250-4 \
 	pr97714 \
 	arc-hf-default \
+	gcc-hash-style-gnu-arc \
 
 ifneq (,$(filter $(distrelease),wheezy jessie stretch buster lucid precise trusty xenial bionic cosmic disco eoan))
   debian_patches += pr85678-revert
-- 
2.25.1


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