gcc6: enable FL_LPAE flag for armv7ve cores

The following commit added the FL_LPAE flag to FL_FOR_ARCH7VE, but
neglected to also add it to the armv7ve compatible cores defined in
arm-cores.def.

  https://github.com/gcc-mirror/gcc/commit/af2d9b9e58e8be576c53d94f30c48c68146b0c98

The result is that gcc 6.4 now refuses to allow -march=armv7ve and
-mcpu=XXX to be used together, even when -mcpu is set to an armv7ve
compatible core:

  arm-linux-gnueabi-gcc -march=armv7ve -mcpu=cortex-a7 -Werror ...
  error: switch -mcpu=cortex-a7 conflicts with -march=armv7ve switch [-Werror]

Fix by defining flags for armv7ve compatible cores directly from
FL_FOR_ARCH7VE, rather than re-creating the armv7ve flags
independently by combining FL_FOR_ARCH7A with the armv7ve specific
FL_THUMB_DIV and FL_ARM_DIV flags.

Signed-off-by: Andre McCurdy <armccurdy@gmail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

diff --git a/meta/recipes-devtools/gcc/gcc-6.4.inc b/meta/recipes-devtools/gcc/gcc-6.4.inc
index 9ddd56f778702bb28abb2afe841aaba413dbcfbe..66654e62a9a33e91f3d88d4c974f922ed61340f4 100644 (file)
--- a/meta/recipes-devtools/gcc/gcc-6.4.inc
+++ b/meta/recipes-devtools/gcc/gcc-6.4.inc
@@ -87,6 +87,7 @@ SRC_URI = "\
 BACKPORTS = "\
            file://CVE-2016-6131.patch \
            file://0057-ARM-PR-82445-suppress-32-bit-aligned-ldrd-strd-peeph.patch \
+           file://0001-enable-FL_LPAE-flag-for-armv7ve-cores.patch \
 "
 SRC_URI[md5sum] = "11ba51a0cfb8471927f387c8895fe232"
 SRC_URI[sha256sum] = "850bf21eafdfe5cd5f6827148184c08c4a0852a37ccf36ce69855334d2c914d4"

diff --git a/meta/recipes-devtools/gcc/gcc-6.4/backport/0001-enable-FL_LPAE-flag-for-armv7ve-cores.patch b/meta/recipes-devtools/gcc/gcc-6.4/backport/0001-enable-FL_LPAE-flag-for-armv7ve-cores.patch
new file mode 100644 (file)
index 0000000..3f664c5
--- /dev/null
+++ b/meta/recipes-devtools/gcc/gcc-6.4/backport/0001-enable-FL_LPAE-flag-for-armv7ve-cores.patch
@@ -0,0 +1,67 @@
+From 22fcc126fad61a8e9ddaaabbc8036644273642dc Mon Sep 17 00:00:00 2001
+From: ktkachov <ktkachov@138bc75d-0d04-0410-961f-82ee72b054a4>
+Date: Thu, 9 Nov 2017 14:34:28 +0000
+Subject: [PATCH] enable FL_LPAE flag for armv7ve cores
+
+The following commit added the FL_LPAE flag to FL_FOR_ARCH7VE, but
+neglected to also add it to the armv7ve compatible cores defined in
+arm-cores.def.
+
+  https://github.com/gcc-mirror/gcc/commit/af2d9b9e58e8be576c53d94f30c48c68146b0c98
+
+The result is that gcc 6.4 now refuses to allow -march=armv7ve and
+-mcpu=XXX to be used together, even when -mcpu is set to an armv7ve
+compatible core:
+
+  arm-linux-gnueabi-gcc -march=armv7ve -mcpu=cortex-a7 -Werror ...
+  error: switch -mcpu=cortex-a7 conflicts with -march=armv7ve switch [-Werror]
+
+Fix by defining flags for armv7ve compatible cores directly from
+FL_FOR_ARCH7VE, rather than re-creating the armv7ve flags
+independently by combining FL_FOR_ARCH7A with the armv7ve specific
+FL_THUMB_DIV and FL_ARM_DIV flags.
+
+Upstream-Status: Backport
+
+git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-6-branch@254584 138bc75d-0d04-0410-961f-82ee72b054a4
+
+Signed-off-by: Andre McCurdy <armccurdy@gmail.com>
+---
+ gcc/config/arm/arm-cores.def | 12 ++++++------
+ 1 file changed, 6 insertions(+), 6 deletions(-)
+
+diff --git a/gcc/config/arm/arm-cores.def b/gcc/config/arm/arm-cores.def
+index 829b839..ca37e6f 100644
+--- a/gcc/config/arm/arm-cores.def
++++ b/gcc/config/arm/arm-cores.def
+@@ -145,12 +145,12 @@ ARM_CORE("cortex-m0plus.small-multiply",cortexm0plussmallmultiply, cortexm0plus,
+ /* V7 Architecture Processors */
+ ARM_CORE("generic-armv7-a",   genericv7a, genericv7a,         7A,     ARM_FSET_MAKE_CPU1 (FL_LDSCHED | FL_FOR_ARCH7A), cortex)
+ ARM_CORE("cortex-a5",         cortexa5, cortexa5,             7A,     ARM_FSET_MAKE_CPU1 (FL_LDSCHED | FL_FOR_ARCH7A), cortex_a5)
+-ARM_CORE("cortex-a7",         cortexa7, cortexa7,             7A,     ARM_FSET_MAKE_CPU1 (FL_LDSCHED | FL_THUMB_DIV | FL_ARM_DIV | FL_FOR_ARCH7A), cortex_a7)
++ARM_CORE("cortex-a7",         cortexa7, cortexa7,             7A,     ARM_FSET_MAKE_CPU1 (FL_LDSCHED | FL_FOR_ARCH7VE), cortex_a7)
+ ARM_CORE("cortex-a8",         cortexa8, cortexa8,             7A,     ARM_FSET_MAKE_CPU1 (FL_LDSCHED | FL_FOR_ARCH7A), cortex_a8)
+ ARM_CORE("cortex-a9",         cortexa9, cortexa9,             7A,     ARM_FSET_MAKE_CPU1 (FL_LDSCHED | FL_FOR_ARCH7A), cortex_a9)
+-ARM_CORE("cortex-a12",                cortexa12, cortexa17,           7A,     ARM_FSET_MAKE_CPU1 (FL_LDSCHED | FL_THUMB_DIV | FL_ARM_DIV | FL_FOR_ARCH7A), cortex_a12)
+-ARM_CORE("cortex-a15",                cortexa15, cortexa15,           7A,     ARM_FSET_MAKE_CPU1 (FL_LDSCHED | FL_THUMB_DIV | FL_ARM_DIV | FL_FOR_ARCH7A), cortex_a15)
+-ARM_CORE("cortex-a17",                cortexa17, cortexa17,           7A,     ARM_FSET_MAKE_CPU1 (FL_LDSCHED | FL_THUMB_DIV | FL_ARM_DIV | FL_FOR_ARCH7A), cortex_a12)
++ARM_CORE("cortex-a12",                cortexa12, cortexa17,           7A,     ARM_FSET_MAKE_CPU1 (FL_LDSCHED | FL_FOR_ARCH7VE), cortex_a12)
++ARM_CORE("cortex-a15",                cortexa15, cortexa15,           7A,     ARM_FSET_MAKE_CPU1 (FL_LDSCHED | FL_FOR_ARCH7VE), cortex_a15)
++ARM_CORE("cortex-a17",                cortexa17, cortexa17,           7A,     ARM_FSET_MAKE_CPU1 (FL_LDSCHED | FL_FOR_ARCH7VE), cortex_a12)
+ ARM_CORE("cortex-r4",         cortexr4, cortexr4,             7R,     ARM_FSET_MAKE_CPU1 (FL_LDSCHED | FL_FOR_ARCH7R), cortex)
+ ARM_CORE("cortex-r4f",                cortexr4f, cortexr4f,           7R,     ARM_FSET_MAKE_CPU1 (FL_LDSCHED | FL_FOR_ARCH7R), cortex)
+ ARM_CORE("cortex-r5",         cortexr5, cortexr5,             7R,     ARM_FSET_MAKE_CPU1 (FL_LDSCHED | FL_ARM_DIV | FL_FOR_ARCH7R), cortex)
+@@ -162,8 +162,8 @@ ARM_CORE("cortex-m3",              cortexm3, cortexm3,             7M,     ARM_FSET_MAKE_CPU1 (FL_LDSCHED |
+ ARM_CORE("marvell-pj4",               marvell_pj4, marvell_pj4,       7A,     ARM_FSET_MAKE_CPU1 (FL_LDSCHED | FL_FOR_ARCH7A), marvell_pj4)
+ 
+ /* V7 big.LITTLE implementations */
+-ARM_CORE("cortex-a15.cortex-a7", cortexa15cortexa7, cortexa7, 7A,     ARM_FSET_MAKE_CPU1 (FL_LDSCHED | FL_THUMB_DIV | FL_ARM_DIV | FL_FOR_ARCH7A), cortex_a15)
+-ARM_CORE("cortex-a17.cortex-a7", cortexa17cortexa7, cortexa7, 7A,     ARM_FSET_MAKE_CPU1 (FL_LDSCHED | FL_THUMB_DIV | FL_ARM_DIV | FL_FOR_ARCH7A), cortex_a12)
++ARM_CORE("cortex-a15.cortex-a7", cortexa15cortexa7, cortexa7, 7A,     ARM_FSET_MAKE_CPU1 (FL_LDSCHED | FL_FOR_ARCH7VE), cortex_a15)
++ARM_CORE("cortex-a17.cortex-a7", cortexa17cortexa7, cortexa7, 7A,     ARM_FSET_MAKE_CPU1 (FL_LDSCHED | FL_FOR_ARCH7VE), cortex_a12)
+ 
+ /* V8 Architecture Processors */
+ ARM_CORE("cortex-a32",        cortexa32, cortexa53,   8A,     ARM_FSET_MAKE_CPU1 (FL_LDSCHED | FL_CRC32 | FL_FOR_ARCH8A), cortex_a35)
+-- 
+1.9.1
+