>>> libiio 0.23 Extracting
gzip -d -c /home/buildroot/autobuild/instance-1/dl/libiio/libiio-0.23.tar.gz | tar --strip-components=1 -C /home/buildroot/autobuild/instance-1/output-1/build/libiio-0.23   -xf -
>>> libiio 0.23 Patching

Applying 0001-C-public-fields-with-getters-setters-cannot-be-marked-readonly.patch using patch: 
patching file bindings/csharp/Device.cs
>>> libiio 0.23 Configuring
(mkdir -p /home/buildroot/autobuild/instance-1/output-1/build/libiio-0.23/ && cd /home/buildroot/autobuild/instance-1/output-1/build/libiio-0.23/ && rm -f CMakeCache.txt && PATH="/home/buildroot/autobuild/instance-1/output-1/host/bin:/home/buildroot/autobuild/instance-1/output-1/host/sbin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"  /home/buildroot/autobuild/instance-1/output-1/host/bin/cmake /home/buildroot/autobuild/instance-1/output-1/build/libiio-0.23/ -DCMAKE_TOOLCHAIN_FILE="/home/buildroot/autobuild/instance-1/output-1/host/share/buildroot/toolchainfile.cmake" -DCMAKE_INSTALL_PREFIX="/usr" -DCMAKE_COLOR_MAKEFILE=OFF -DBUILD_DOC=OFF -DBUILD_DOCS=OFF -DBUILD_EXAMPLE=OFF -DBUILD_EXAMPLES=OFF -DBUILD_TEST=OFF -DBUILD_TESTS=OFF -DBUILD_TESTING=OFF -DBUILD_SHARED_LIBS=ON  -DENABLE_IPV6=ON -DWITH_LOCAL_BACKEND=OFF -DWITH_NETWORK_BACKEND=OFF -DINSTALL_UDEV_RULE=OFF -DWITH_TESTS=OFF -DWITH_DOC=OFF -DWITH_XML_BACKEND=ON -DWITH_USB_BACKEND=OFF -DWITH_SERIAL_BACKEND=ON -DWITH_IIOD=OFF -DWITH_IIOD_USBD=OFF -DWITH_AIO=OFF -DHAVE_DNS_SD=OFF -DPYTHON_BINDINGS=OFF -DCSHARP_BINDINGS=OFF )
-- cmake version: 3.16.9
-- The C compiler identification is GNU 9.3.0
-- Check for working C compiler: /home/buildroot/autobuild/instance-1/output-1/host/bin/arm-linux-gcc
-- Check for working C compiler: /home/buildroot/autobuild/instance-1/output-1/host/bin/arm-linux-gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Performing Test HAS_WPEDANTIC
-- Performing Test HAS_WPEDANTIC - Success
-- Performing Test HAS_WSHADOW
-- Performing Test HAS_WSHADOW - Success
-- Looking for strdup
-- Looking for strdup - found
-- Looking for strndup
-- Looking for strndup - found
-- Looking for strerror_r
-- Looking for strerror_r - found
-- Looking for newlocale
-- Looking for newlocale - found
-- Looking for in6addr_any
-- Looking for in6addr_any - found
-- Found Git: /usr/bin/git (found version "2.11.0") 
-- Looking for libserialport : Found
-- Building without network support
-- Performing Test Iconv_IS_BUILT_IN
-- Performing Test Iconv_IS_BUILT_IN - Success
CMake Error at CMakeLists.txt:409 (message):
  Unable to find pthread dependency.

  If you want to disable multi-threading support, set NO_THREADS=ON.


CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
PTHREAD_LIBRARIES
    linked by target "iio" in directory /home/buildroot/autobuild/instance-1/output-1/build/libiio-0.23

-- Configuring incomplete, errors occurred!
See also "/home/buildroot/autobuild/instance-1/output-1/build/libiio-0.23/CMakeFiles/CMakeOutput.log".
package/pkg-generic.mk:273: recipe for target '/home/buildroot/autobuild/instance-1/output-1/build/libiio-0.23/.stamp_configured' failed
make: *** [/home/buildroot/autobuild/instance-1/output-1/build/libiio-0.23/.stamp_configured] Error 1
make: Leaving directory '/home/buildroot/autobuild/instance-1/buildroot'