I want to build as a static library from the Qt 4.8.7 source, only the QtCore and QtNetworking components, for an embedded ARM64 platform as static libraries. This if for a native platform build on the ARM platform itself as opposed to cross compiling.
In summary, while the configuration procedure works without event, where on the command line I specify the ARM architecture since the configuration process is unable to identify the aarch64 platform as ARM, during the build procedure, I get assembly errors.
It seems the area of failure may be with the QAtomic assembly implementation. When I do not configure the architecture as ARM, and the architecture is identified as simply generic, I am able to build, but there are warnings about using a very inefficient pthread mutex used to implement QAtomic operations for platforms not yet supported.
I desperately need to use the QAtomic implementation that uses fast processor specific assembly language.
The following configure message is displayed when using the generic platform architecture
My suspicion is that the Qt 4.8.x source distribution may not have the proper assembly language or atomic operations for the ARM64 platform, or that the source needs to be augmented to do so.Quote:
NOTICE: Atomic operations are not yet supported for this
architecture.
Qt will use the 'generic' architecture instead, which uses a
single pthread_mutex_t to protect all atomic operations. This
implementation is the slow (but safe) fallback implementation
for architectures Qt does not yet support.
I was wondering if perhaps I needed to duplicate some mkspecs content that is provided with Qt5 as a possible solution or other source code to support the ARM64 build.
Information on the ARM itself is as follows:
My configuration settings are as follows:Quote:
lscpu
Architecture: aarch64
Byte Order: Little Endian
CPU(s): 4
On-line CPU(s) list: 0-3
Thread(s) per core: 1
Core(s) per socket: 4
Socket(s): 1
Vendor ID: ARM
Model: 4
Model name: Cortex-A53
Stepping: r0p4
BogoMIPS: 100.00
Flags: fp asimd evtstrm aes pmull sha1 sha2 crc32
Code:
Here I have specified the target platform as ARM since ./configure was not able to resolve the platform using the retrieved aarch64 architecture.
Specifying arm and littleendian on command line to the configuration, the configuration process works without event to completion with the following summary. You can see I am simply trying to build the QtCore and QtNetwork libraries, and nothing else, so bare bones.
Code:
During the make procedure following the configuration, the following compile issue is consistently indicated.
The failure occurs in qabstractanimation.o, that is part of the core library.
My application has no Qt based user interface.
Code:
