I managed to compile qt but it suffer from default
-fstrict-volatile-bitfields in GCC 4.6.0.
This patch add -fno-strict-volatile-bitfields which resolve compilation
issue. Another patch is to disable neon on non-neon armv7hl
IMO. This should be same bug as one in kernel ehci-hub. armv5tel should
be affected too.
So is this good or it will be fixed in GCC?
>From 809cb82c83ef0580db3b3a9507d26a12e8466e71 Mon Sep 17 00:00:00 2001
From: Zoran Pericic <zpericic@xxxxxxxxx>
Date: Tue, 2 Aug 2011 15:21:59 -0400
Subject: [PATCH 1/2] Fix GCC 4.6.0 strict-volatile-bitfields
GCC 4.6.0 uses -fstrict-volatile-bitfields which breaks ARM build:
qatomic_arm.h error: output number 1 not directly addressable
---
qt.spec | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/qt.spec b/qt.spec
index 3490f07..0ecc5a6 100644
--- a/qt.spec
+++ b/qt.spec
@@ -576,6 +576,10 @@ RPM_OPT_FLAGS=`echo $RPM_OPT_FLAGS | sed 's|-fexceptions||g'`
rm -fv mkspecs/linux-g++*/qmake.conf.multilib
%patch4 -p1 -b .uic_multilib
+%ifarch armv7hl arv7hnl
+export RPM_OPT_FLAGS="$RPM_OPT_FLAGS -fno-strict-volatile-bitfields"
+%endif
+
sed -i \
-e "s|-O2|$RPM_OPT_FLAGS|g" \
-e "s|g++.conf|g++-multilib.conf|g" mkspecs/%{platform}/qmake.conf
--
1.7.6
>From 1c061fa2b70c72b8f32eebf1ee1e59174f4b7d26 Mon Sep 17 00:00:00 2001
From: Zoran Pericic <zpericic@xxxxxxxxx>
Date: Tue, 2 Aug 2011 15:17:24 -0400
Subject: [PATCH 2/2] Disable neon for non armv7hnl
---
qt.spec | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/qt.spec b/qt.spec
index 0ecc5a6..519cf52 100644
--- a/qt.spec
+++ b/qt.spec
@@ -656,6 +656,9 @@ done
-glib \
-openssl-linked \
-xmlpatterns \
+%ifnarch armv7hnl
+ -no-neon \
+%endif
%{?dbus} %{!?dbus:-no-dbus} \
%{?webkit} %{!?webkit:-no-webkit } \
%{?ibase} \
--
1.7.6
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