>>> libcpprestsdk 2.10.14 Downloading
converted 'https://github.com/Microsoft/cpprestsdk/archive/v2.10.14/libcpprestsdk-2.10.14.tar.gz' (ANSI_X3.4-1968) -> 'https://github.com/Microsoft/cpprestsdk/archive/v2.10.14/libcpprestsdk-2.10.14.tar.gz' (UTF-8)
--2019-08-15 02:44:07--  https://github.com/Microsoft/cpprestsdk/archive/v2.10.14/libcpprestsdk-2.10.14.tar.gz
Resolving github.com (github.com)... 140.82.114.4
Connecting to github.com (github.com)|140.82.114.4|:443... connected.
HTTP request sent, awaiting response... 302 Found
Location: https://codeload.github.com/microsoft/cpprestsdk/tar.gz/v2.10.14 [following]
converted 'https://codeload.github.com/microsoft/cpprestsdk/tar.gz/v2.10.14' (ANSI_X3.4-1968) -> 'https://codeload.github.com/microsoft/cpprestsdk/tar.gz/v2.10.14' (UTF-8)
--2019-08-15 02:44:08--  https://codeload.github.com/microsoft/cpprestsdk/tar.gz/v2.10.14
Resolving codeload.github.com (codeload.github.com)... 140.82.114.9
Connecting to codeload.github.com (codeload.github.com)|140.82.114.9|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [application/x-gzip]
Saving to: '/home/buildroot/build/instance-2/output/build/.libcpprestsdk-2.10.14.tar.gz.GKccic/output'

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2019-08-15 02:44:09 (2.90 MB/s) - '/home/buildroot/build/instance-2/output/build/.libcpprestsdk-2.10.14.tar.gz.GKccic/output' saved [1762692]

libcpprestsdk-2.10.14.tar.gz: OK (sha256: f2628b248f714d7bbd6a536553bc3782602c68ca1b129017985dd70cc3515278)
>>> libcpprestsdk 2.10.14 Extracting
gzip -d -c /home/buildroot/build/instance-2/buildroot/instance-2/dl/libcpprestsdk/libcpprestsdk-2.10.14.tar.gz | tar --strip-components=1 -C /home/buildroot/build/instance-2/output/build/libcpprestsdk-2.10.14   -xf -
>>> libcpprestsdk 2.10.14 Patching

Applying 0001-libcpprestsdk-fix-building-as-a-static-library.patch using patch: 
patching file Release/cmake/cpprest_find_openssl.cmake
>>> libcpprestsdk 2.10.14 Configuring
(mkdir -p /home/buildroot/build/instance-2/output/build/libcpprestsdk-2.10.14/Release && cd /home/buildroot/build/instance-2/output/build/libcpprestsdk-2.10.14/Release && rm -f CMakeCache.txt && PATH="/home/buildroot/build/instance-2/output/host/bin:/home/buildroot/build/instance-2/output/host/sbin:/sbin:/usr/sbin:/bin:/usr/bin"  /home/buildroot/build/instance-2/output/host/bin/cmake /home/buildroot/build/instance-2/output/build/libcpprestsdk-2.10.14/Release -DCMAKE_TOOLCHAIN_FILE="/home/buildroot/build/instance-2/output/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  -DWERROR=OFF -DBUILD_SAMPLES=OFF -DCPPREST_EXCLUDE_BROTLI=ON -DCPPREST_EXCLUDE_WEBSOCKETS=OFF -DCMAKE_CXX_FLAGS="-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -Os   -latomic" )
-- The C compiler identification is GNU 7.4.0
-- The CXX compiler identification is GNU 7.4.0
-- Check for working C compiler: /home/buildroot/build/instance-2/output/host/bin/aarch64-linux-gcc
-- Check for working C compiler: /home/buildroot/build/instance-2/output/host/bin/aarch64-linux-gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /home/buildroot/build/instance-2/output/host/bin/aarch64-linux-g++
-- Check for working CXX compiler: /home/buildroot/build/instance-2/output/host/bin/aarch64-linux-g++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Looking for pthread_create
-- Looking for pthread_create - not found
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE  
-- Looking for include file xlocale.h
-- Looking for include file xlocale.h - not found
-- Setting gcc options
CMake Error at /home/buildroot/build/instance-2/output/host/aarch64-buildroot-linux-gnu/sysroot/lib/cmake/websocketpp/websocketpp-config.cmake:26 (message):
  File or directory
  /home/buildroot/build/instance-2/output/host/aarch64-buildroot-linux-gnu/sysroot/include
  referenced by variable WEBSOCKETPP_INCLUDE_DIR does not exist !
Call Stack (most recent call first):
  /home/buildroot/build/instance-2/output/host/aarch64-buildroot-linux-gnu/sysroot/lib/cmake/websocketpp/websocketpp-config.cmake:31 (set_and_check)
  cmake/cpprest_find_websocketpp.cmake:6 (find_package)
  src/CMakeLists.txt:68 (cpprest_find_websocketpp)


-- Configuring incomplete, errors occurred!
See also "/home/buildroot/build/instance-2/output/build/libcpprestsdk-2.10.14/Release/CMakeFiles/CMakeOutput.log".
See also "/home/buildroot/build/instance-2/output/build/libcpprestsdk-2.10.14/Release/CMakeFiles/CMakeError.log".
package/pkg-generic.mk:228: recipe for target '/home/buildroot/build/instance-2/output/build/libcpprestsdk-2.10.14/.stamp_configured' failed
make: *** [/home/buildroot/build/instance-2/output/build/libcpprestsdk-2.10.14/.stamp_configured] Error 1
make: Leaving directory '/home/buildroot/build/instance-2/buildroot'