I have cross compiler polarssl and nghhtp2. No I am trying to compile curl.
I am using commands as below:

PATH=/home/rspolyak/projects/openwrt_vanilla/staging_dir/toolchain-mipsel_24kec+dsp_gcc-4.8-linaro_uClibc-0.9.33.2/bin/:"$PATH"
PKG_CONFIG_PATH=/home/rspolyak/projects/curl_http2/nghttp2/build_dir/lib/pkgconfig/:$PKG_CONFIG_PATH

export CROSS_COMPILE="mipsel-openwrt-linux-uclibc"
export AR=${CROSS_COMPILE}-ar
export AS=${CROSS_COMPILE}-as
export LD=${CROSS_COMPILE}-ld
export RANLIB=${CROSS_COMPILE}-ranlib
export CC=${CROSS_COMPILE}-gcc
export NM=${CROSS_COMPILE}-nm

./configure --prefix=${ROOTDIR}/build_dir --target=${CROSS_COMPILE}
--host=${CROSS_COMPILE} --build=x86_64-pc-linux-gnu --without-ssl
--with-polarssl
--with-nghttp2=/home/rspolyak/projects/curl_http2/nghttp2/build_dir/lib

Last command fails with:

*checking for recv... noconfigure: error: Unable to link function recv*

The same issue is mentioned here
<https://stackoverflow.com/questions/44343570/cross-compiling-libcurl-for-arm-linux-gnueabihf-unable-to-link-function-recv>
and here <https://cmake.org/pipermail/cmake/2008-January/019512.html>. But
neither of them was addressed...

Please advice.

2017-06-21 16:17 GMT+03:00 Daniel Stenberg <daniel_at_haxx.se>:

> On Wed, 21 Jun 2017, rostokus . via curl-users wrote:
>
> root_at_mylinkit:~# curl --version
>> curl 7.40.0 (mipsel-openwrt-linux-gnu) libcurl/7.40.0 PolarSSL/1.3.14
>> Protocols: file ftp ftps http https
>> Features: IPv6 Largefile SSL
>>
>
> No HTTP/2 support present. The output should otherwise list both nghttp2
> library version and http2 among the Features.
>
> root@mylinkit:~# curl -v --http2 https://nghttp2.org
>> curl: (1) Error
>>
>
> I can't explain why you get this weird error though. It should just say
> that HTTP/2 isn't supported. But then 7.40.0 is pretty old and I can't
> remember exactly how immature the HTTP/2 support was back then.
>
> I suspect that nghttp2 is not installed
>>
>
> Well, you need curl/libcurl to get *built* with support for HTTP/2 so it
> takes a little more than just installing nghttp2.
>
> p.s. I am read https://curl.haxx.se/libcurl/c/libcurl-errors.html. But
>> still it does not explain what exactly is wrong here.
>>
>
> As you're using the curl tool and not libcurl directly, this is probably a
> better URL to check: https://curl.haxx.se/docs/manpage.html#EXIT
>
> "Unsupported protocol. This build of curl has no support for this
> protocol"
>
> --
>
> / daniel.haxx.se
>

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Received on 2017-06-22