[OpenWrt-Devel] [PATCH 3/3] curl: add flags to allow gc-sections to strip out unused code

[Dirk Feytons]

On 7 April 2016 at 18:22, Hauke Mehrtens <hauke at hauke-m.de> wrote:

> On 04/07/2016 10:21 AM, Dirk Feytons wrote:
> > Signed-off-by: Dirk Feytons <dirk.feytons at gmail.com>
> > ---
> >  package/network/utils/curl/Makefile |    3 ++-
> >  1 file changed, 2 insertions(+), 1 deletion(-)
> >
> > diff --git a/package/network/utils/curl/Makefile
> b/package/network/utils/curl/Makefile
> > index 319c0b7..af38ed4 100644
> > --- a/package/network/utils/curl/Makefile
> > +++ b/package/network/utils/curl/Makefile
> > @@ -99,8 +99,9 @@ define Package/libcurl/config
> >    source "$(SOURCE)/Config.in"
> >  endef
> >
> > -TARGET_CFLAGS += $(FPIC)
> > +TARGET_CFLAGS += $(FPIC) -ffunction-sections -fdata-sections
> >  TARGET_CPPFLAGS += $(if $(CONFIG_LIBCURL_NTLM),,-DCURL_DISABLE_NTLM)
> > +TARGET_LDFLAGS += -Wl,--gc-sections
> >
> >  CONFIGURE_ARGS += \
> >       --disable-debug \
> >
> Out of curiosity, have you checked how much memory this saves?
>

I did :)
A basic build of libcurl with only HTTP/HTTPS support (via OpenSSL) is
207828 bytes without --gc-sections and 195348 with. Not bad I would say.
For the curl application itself the numbers are 87728 and 86864 bytes, so
there the difference is less.

Dirk F.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.infradead.org/pipermail/openwrt-devel/attachments/20160407/9e8b5d2f/attachment.htm>
-------------- next part --------------
_______________________________________________
openwrt-devel mailing list
openwrt-devel at lists.openwrt.org
https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel