[OpenWrt-Devel] Reducing the root file system in openwrt

[Arjav Parikh]

Hi Ronaldo,

I tried doing that by removing the copy line in Makefile but anyhow those
files come into build_dir.

I suspect that those files get included from dl directory. Is my
understanding in this correct?

If I remove packages from dl directory then I get compilation errors.


Thanks & Regards,
Arjav Parikh

On Mar 7, 2018 6:49 PM, "Ronaldo Afonso" <ronaldo at ronaldoafonso.com.br>
wrote:

>   Arjav,
>
>   I'm not 100% sure of that, but if I were you I would take a look at the
> Makefiles that generate those packages whose files you don't want to be
> included in the final build image.
>
>   Often the "install" directive of an OpenWrt Makefile is where developers
> "include" the files they want to be include in the final image.
>
>   Here is an example of libbz2 package:
>
>  77 define Package/libbz2/install
>  78     $(INSTALL_DIR) $(1)/usr/lib/
>  79     $(CP) $(PKG_BUILD_DIR)/libbz2.so.$(PKG_VERSION) $(1)/usr/lib/
>  80     $(LN) libbz2.so.$(PKG_VERSION) $(1)/usr/lib/libbz2.so.1.0
>  81 endef
>
>   For example, if you don't want the "libbz2.so" to be included, you can
> remove lines 79 and 80.
>
>
>
>
>
> 2018-03-07 9:00 GMT-03:00 Arjav Parikh <parikharjav24 at gmail.com>:
>
>> Hi Ronaldo,
>>
>> I am building firmware for IPQ806x platform. I have been able to
>> reduce my firmware image from 22 MB to 10 MB  by disabling unwanted
>> kernel modules and libraries using make menuconfig.
>>
>> But there are files in root-ipq806x/lib/fimrware directory of approx
>> size 4.4 MB. I do not require any of the files present in this
>> directory. I tried to remove those files by removing its entry from
>> root-ipq806x/usr/lib/opkg/info/wigig-firmware.list assuming that on
>> next build these files wont appear but still the files are there in
>> /lib/firmware directory.
>> By removing these files I can further reduce filesystem by 4 MB.
>>
>>
>> On Wed, Mar 7, 2018 at 5:07 PM, Ronaldo Afonso
>> <ronaldo at ronaldoafonso.com.br> wrote:
>> >   Hi Arjav,
>> >
>> >   Which kind of firmware are you using? An OpenWrt prebuilt (from
>> > https://downloads.openwrt.org/releases/) or a firmware build by
>> yourself?
>> >
>> >   Well, in or case, I suggest you build your firmware ... using "make
>> > menuconfig" is the first thing to try for removing unnecessary binaries.
>> >
>> >
>> >
>> > 2018-03-07 8:02 GMT-03:00 Arjav Parikh <parikharjav24 at gmail.com>:
>> >>
>> >> Hi,
>> >>
>> >> I want to reduce the root file system size for my project. Till now
>> >> after removing the unnecessary kernel modules, libraries and using
>> >> strip binary the file system size has been reduced to 8.3 MB. Bu there
>> >> are still some files which are not required and I am unaware of how to
>> >> prvent these files from being included in my file system using
>> >> openwrt.
>> >>
>> >> For Ex: there are multiple binaries in /lib/firmware which are not
>> >> required. This folder itself contains size of 4.4 MB, apart from these
>> >> there are many libraries in /lib as well as /usr/lib which are not
>> >> required.
>> >>
>> >> Can anyone please guide of how to remove firmware binaries and
>> >> libraries in openwrt.
>> >>
>> >> --
>> >> Thanks & Regards,
>> >> Arjav Parikh
>> >> _______________________________________________
>> >> openwrt-devel mailing list
>> >> openwrt-devel at lists.openwrt.org
>> >> https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel
>> >
>> >
>> >
>> >
>> > --
>> > Ronaldo Afonso
>> > 11 9 5252 0484
>> > www.ronaldoafonso.com.br
>>
>>
>>
>> --
>> Thanks & Regards,
>> Arjav Parikh
>>
>
>
>
> --
> Ronaldo Afonso
> 11 9 5252 0484
> www.ronaldoafonso.com.br
>
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