linux-nokia800-2.6.21-osso71.bb fixed undefined reference to __aeabi_uldivmod problem when using gcc-4.3 compile linux-nokia800-2.6.21-osso71
PATCH 1/1 linux-nokia800-2.6.21-osso71.bb fixed undefined reference to __aeabi_uldivmod problem when using gcc-4.3 compile linux-nokia800-2.6.21-osso71
From bc8990dbee051e9f36a2b90761ce1f405f8dabc6 Mon Sep 17 00:00:00 2001
From: Ming Zhou <[email protected]>
Date: Fri, 21 Aug 2009 02:04:15 +0800
Subject: [PATCH] linux-nokia800-2.6.21-osso71.bb fixed undefined reference to __aeabi_uldivmod problem when using gcc-4.3 compile linux-nokia800-2.6.21-osso71
---
...x-gcc-4.3-false-modulo-optimization.patch.patch | 48 ++++++++++++++++++++
recipes/linux/linux-nokia800_2.6.21-osso71.bb | 1 +
2 files changed, 49 insertions(+), 0 deletions(-)
create mode 100644 recipes/linux/linux-nokia800-2.6.21-osso71/1300-fix-gcc-4.3-false-modulo-optimization.patch.patch
recipes/linux/linux-nokia800-2.6.21-osso71/1300-fix-gcc-4.3-false-modulo-optimization.patch.patch new file +48 -0
@@ -0,0 +1,48 @@ +From f5b973489beb1a1239dfad53e3ad6e36ff7ee958 Mon Sep 17 00:00:00 2001 +From: Segher Boessenkool <[email protected]> +Date: Thu, 9 Oct 2008 21:18:27 +0100 +Subject: [PATCH] fix-gcc-4.3-false-modulo-optimization.patch + +I tried to compile the current stable kernel +(a2ef813d2f439a3e9f377d33a2e5baad098afb7e) +and get the following errors: + +kernel/built-in.o: In function `timespec_add_ns': +/mnt/data/Freerunner/Gentoo/rootinstall/usr/src/linux/include/linux/time.h:174: +undefined reference to `__aeabi_uldivmod' +/mnt/data/Freerunner/Gentoo/rootinstall/usr/src/linux/include/linux/time.h:179: +undefined reference to `__aeabi_uldivmod' +/mnt/data/Freerunner/Gentoo/rootinstall/usr/src/linux/include/linux/time.h:174: +undefined reference to `__aeabi_uldivmod' +/mnt/data/Freerunner/Gentoo/rootinstall/usr/src/linux/include/linux/time.h:179: +undefined reference to `__aeabi_uldivmod' + +applying the following patch solved the problem: +-------- +Prevent gcc-4.3 form "optimizing" the while loop into a costly modulo operation. +Patch found at http://lkml.org/lkml/2008/2/22/464. + +Reported-by: Sven Rebhan <[email protected]> +Signed-off-by: Segher Boessenkool <[email protected]> +--- + include/linux/time.h | 4 ++++ + 1 files changed, 4 insertions(+), 0 deletions(-) + +diff --git a/include/linux/time.h b/include/linux/time.h +index b04136d..3e8fd9e 100644 +--- a/include/linux/time.h ++++ b/include/linux/time.h +@@ -173,6 +173,10 @@ static inline void timespec_add_ns(struct timespec *a, u64 ns) + { + ns += a->tv_nsec; + while(unlikely(ns >= NSEC_PER_SEC)) { ++ /* The following asm() prevents the compiler from ++ * optimising this loop into a modulo operation. */ ++ asm("" : "+r"(ns)); ++ + ns -= NSEC_PER_SEC; + a->tv_sec++; + } +-- +1.5.6.5 +
recipes/linux/linux-nokia800_2.6.21-osso71.bb +0 -0
@@ -8,6 +8,7 @@ SRC_URI = "${KERNELORG_MIRROR}/pub/linux/kernel/v2.6/linux-2.6.21.tar.bz2 \
http://www.rpsys.net/openzaurus/patches/archive/input_power-r7.patch;patch=1 \ file://suspend-button.patch;patch=1 \ file://linux-2.6-limits.patch;patch=1 \
+ file://1300-fix-gcc-4.3-false-modulo-optimization.patch.patch;patch=1 \
file://defconfig"
S = "${WORKDIR}/linux-2.6.21"
Signature · 1 line
1.5.4.3
Quoted 6 lines · On Thursday 20 August 2009 20:10:42 Ming Chow 周明 wrote:
From
bc8990dbee051e9f36a2b90761ce1f405f8dabc6Mon Sep 17 00:00:00 2001
From: Ming Zhou <[email protected]>
Date: Fri, 21 Aug 2009 02:04:15 +0800
Subject: [PATCH] linux-nokia800-2.6.21-osso71.bb fixed undefined reference to__aeabi_uldivmodproblem when using gcc-4.3 compile linux-nokia800-2.6.21-osso71
http://patchwork.openembedded.org/patch/975/
Your mailer created a total mess, could you attempt to fix that?
Sure. Thank you.
Quoted 14 lines · Holger Hans Peter Freyther
Quoted 7 lines · On Thursday 20 August 2009 20:10:42 Ming Chow 周明 wrote:
From
bc8990dbee051e9f36a2b90761ce1f405f8dabc6Mon Sep 17 00:00:00 2001
From: Ming Zhou <[email protected]>
Date: Fri, 21 Aug 2009 02:04:15 +0800
Subject: [PATCH] linux-nokia800-2.6.21-osso71.bb fixed undefined reference to__aeabi_uldivmodproblem when using gcc-4.3 compile linux-nokia800-2.6.21-osso71
Quoted 7 lines
Your mailer created a total mess, could you attempt to fix that?
_______________________________________________
Openembedded-devel mailing list
[email protected]
http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-devel
From bc8990dbee051e9f36a2b90761ce1f405f8dabc6 Mon Sep 17 00:00:00 2001
From: Ming Zhou <[email protected]>
Date: Fri, 21 Aug 2009 02:04:15 +0800
Subject: [PATCH] linux-nokia800_2.6.21-osso71.bb fixed undefined reference to __aeabi_uldivmod problem when using gcc-4.3 compile linux-nokia800-2.6.21-osso71
--- ...x-gcc-4.3-false-modulo-optimization.patch.patch | 48 ++++++++++++++++++++ recipes/linux/linux-nokia800_2.6.21-osso71.bb | 1 + 2 files changed, 49 insertions(+), 0 deletions(-) create mode 100644 recipes/linux/linux-nokia800-2.6.21-osso71/1300-fix-gcc-4.3-false-modulo-optimization.patch.patch
recipes/linux/linux-nokia800-2.6.21-osso71/1300-fix-gcc-4.3-false-modulo-optimization.patch.patch new file +48 -0
@@ -0,0 +1,48 @@ +From f5b973489beb1a1239dfad53e3ad6e36ff7ee958 Mon Sep 17 00:00:00 2001 +From: Segher Boessenkool <[email protected]> +Date: Thu, 9 Oct 2008 21:18:27 +0100 +Subject: [PATCH] fix-gcc-4.3-false-modulo-optimization.patch + +I tried to compile the current stable kernel +(a2ef813d2f439a3e9f377d33a2e5baad098afb7e) +and get the following errors: + +kernel/built-in.o: In function `timespec_add_ns': +/mnt/data/Freerunner/Gentoo/rootinstall/usr/src/linux/include/linux/time.h:174: +undefined reference to `__aeabi_uldivmod' +/mnt/data/Freerunner/Gentoo/rootinstall/usr/src/linux/include/linux/time.h:179: +undefined reference to `__aeabi_uldivmod' +/mnt/data/Freerunner/Gentoo/rootinstall/usr/src/linux/include/linux/time.h:174: +undefined reference to `__aeabi_uldivmod' +/mnt/data/Freerunner/Gentoo/rootinstall/usr/src/linux/include/linux/time.h:179: +undefined reference to `__aeabi_uldivmod' + +applying the following patch solved the problem: +-------- +Prevent gcc-4.3 form "optimizing" the while loop into a costly modulo operation. +Patch found at http://lkml.org/lkml/2008/2/22/464. + +Reported-by: Sven Rebhan <[email protected]> +Signed-off-by: Segher Boessenkool <[email protected]> +--- + include/linux/time.h | 4 ++++ + 1 files changed, 4 insertions(+), 0 deletions(-) + +diff --git a/include/linux/time.h b/include/linux/time.h +index b04136d..3e8fd9e 100644 +--- a/include/linux/time.h ++++ b/include/linux/time.h +@@ -173,6 +173,10 @@ static inline void timespec_add_ns(struct timespec *a, u64 ns) + { + ns += a->tv_nsec; + while(unlikely(ns >= NSEC_PER_SEC)) { ++ /* The following asm() prevents the compiler from ++ * optimising this loop into a modulo operation. */ ++ asm("" : "+r"(ns)); ++ + ns -= NSEC_PER_SEC; + a->tv_sec++; + } +-- +1.5.6.5 +
recipes/linux/linux-nokia800_2.6.21-osso71.bb +1 -0
@@ -8,6 +8,7 @@ SRC_URI = "${KERNELORG_MIRROR}/pub/linux/kernel/v2.6/linux-2.6.21.tar.bz2 \ http://www.rpsys.net/openzaurus/patches/archive/input_power-r7.patch;patch=1 \ file://suspend-button.patch;patch=1 \ file://linux-2.6-limits.patch;patch=1 \ + file://1300-fix-gcc-4.3-false-modulo-optimization.patch.patch;patch=1 \ file://defconfig" S = "${WORKDIR}/linux-2.6.21"
Signature · 1 line
1.5.4.3