Hi I am trying to build the project but getting the following error on make for dir in pjlib/build pjlib-util/build pjnath/build third_party/build pjmedia/build pjsip/build pjsip-apps/build ; do \ if make -C $dir all; then \ true; \ else \ exit 1; \ fi; \ done make[1]: Entering directory `/home/osboxes/Downloads/pjproject-2.7/pjlib/build' make -f /home/osboxes/Downloads/pjproject-2.7/build/rules.mak APP=PJLIB app=pjlib ../lib/libpj-x86_64-unknown-linux-gnu.a make[2]: Entering directory `/home/osboxes/Downloads/pjproject-2.7/pjlib/build' make[2]: `../lib/libpj-x86_64-unknown-linux-gnu.a' is up to date. make[2]: Leaving directory `/home/osboxes/Downloads/pjproject-2.7/pjlib/build' make -f /home/osboxes/Downloads/pjproject-2.7/build/rules.mak APP=TEST app=pjlib-test ../bin/pjlib-test-x86_64-unknown-linux-gnu make[2]: Entering directory `/home/osboxes/Downloads/pjproject-2.7/pjlib/build' make[2]: `../bin/pjlib-test-x86_64-unknown-linux-gnu' is up to date. make[2]: Leaving directory `/home/osboxes/Downloads/pjproject-2.7/pjlib/build' make[1]: Leaving directory `/home/osboxes/Downloads/pjproject-2.7/pjlib/build' make[1]: Entering directory `/home/osboxes/Downloads/pjproject-2.7/pjlib-util/build' make -f /home/osboxes/Downloads/pjproject-2.7/build/rules.mak APP=PJLIB_UTIL app=pjlib-util ../lib/libpjlib-util-x86_64-unknown-linux-gnu.a make[2]: Entering directory `/home/osboxes/Downloads/pjproject-2.7/pjlib-util/build' make[2]: `../lib/libpjlib-util-x86_64-unknown-linux-gnu.a' is up to date. make[2]: Leaving directory `/home/osboxes/Downloads/pjproject-2.7/pjlib-util/build' make -f /home/osboxes/Downloads/pjproject-2.7/build/rules.mak APP=UTIL_TEST app=pjlib-util-test ../bin/pjlib-util-test-x86_64-unknown-linux-gnu make[2]: Entering directory `/home/osboxes/Downloads/pjproject-2.7/pjlib-util/build' make[2]: `../bin/pjlib-util-test-x86_64-unknown-linux-gnu' is up to date. make[2]: Leaving directory `/home/osboxes/Downloads/pjproject-2.7/pjlib-util/build' make[1]: Leaving directory `/home/osboxes/Downloads/pjproject-2.7/pjlib-util/build' make[1]: Entering directory `/home/osboxes/Downloads/pjproject-2.7/pjnath/build' make -f /home/osboxes/Downloads/pjproject-2.7/build/rules.mak APP=PJNATH app=pjnath ../lib/libpjnath-x86_64-unknown-linux-gnu.a make[2]: Entering directory `/home/osboxes/Downloads/pjproject-2.7/pjnath/build' make[2]: `../lib/libpjnath-x86_64-unknown-linux-gnu.a' is up to date. make[2]: Leaving directory `/home/osboxes/Downloads/pjproject-2.7/pjnath/build' make -f /home/osboxes/Downloads/pjproject-2.7/build/rules.mak APP=PJNATH_TEST app=pjnath-test ../bin/pjnath-test-x86_64-unknown-linux-gnu make[2]: Entering directory `/home/osboxes/Downloads/pjproject-2.7/pjnath/build' make[2]: `../bin/pjnath-test-x86_64-unknown-linux-gnu' is up to date. make[2]: Leaving directory `/home/osboxes/Downloads/pjproject-2.7/pjnath/build' make -f /home/osboxes/Downloads/pjproject-2.7/build/rules.mak APP=PJTURN_CLIENT app=pjturn-client ../bin/pjturn-client-x86_64-unknown-linux-gnu make[2]: Entering directory `/home/osboxes/Downloads/pjproject-2.7/pjnath/build' make[2]: `../bin/pjturn-client-x86_64-unknown-linux-gnu' is up to date. make[2]: Leaving directory `/home/osboxes/Downloads/pjproject-2.7/pjnath/build' make -f /home/osboxes/Downloads/pjproject-2.7/build/rules.mak APP=PJTURN_SRV app=pjturn-srv ../bin/pjturn-srv-x86_64-unknown-linux-gnu make[2]: Entering directory `/home/osboxes/Downloads/pjproject-2.7/pjnath/build' make[2]: `../bin/pjturn-srv-x86_64-unknown-linux-gnu' is up to date. make[2]: Leaving directory `/home/osboxes/Downloads/pjproject-2.7/pjnath/build' make[1]: Leaving directory `/home/osboxes/Downloads/pjproject-2.7/pjnath/build' make[1]: Entering directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build' for dir in gsm ilbc speex g7221 srtp resample yuv webrtc; do \ if make -C $dir all; then \ true; \ else \ exit 1; \ fi; \ done make[2]: Entering directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/gsm' make -f /home/osboxes/Downloads/pjproject-2.7/build/rules.mak APP=GSM_CODEC app=libgsmcodec ../../lib/libgsmcodec-x86_64-unknown-linux-gnu.a make[3]: Entering directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/gsm' make[3]: `../../lib/libgsmcodec-x86_64-unknown-linux-gnu.a' is up to date. make[3]: Leaving directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/gsm' make[2]: Leaving directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/gsm' make[2]: Entering directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/ilbc' make -f /home/osboxes/Downloads/pjproject-2.7/build/rules.mak APP=ILBC app=libilbccodec ../../lib/libilbccodec-x86_64-unknown-linux-gnu.a make[3]: Entering directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/ilbc' make[3]: `../../lib/libilbccodec-x86_64-unknown-linux-gnu.a' is up to date. make[3]: Leaving directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/ilbc' make[2]: Leaving directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/ilbc' make[2]: Entering directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/speex' make -f /home/osboxes/Downloads/pjproject-2.7/build/rules.mak APP=SPEEX app=libspeex ../../lib/libspeex-x86_64-unknown-linux-gnu.a make[3]: Entering directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/speex' make[3]: `../../lib/libspeex-x86_64-unknown-linux-gnu.a' is up to date. make[3]: Leaving directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/speex' make[2]: Leaving directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/speex' make[2]: Entering directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/g7221' make -f /home/osboxes/Downloads/pjproject-2.7/build/rules.mak APP=G7221_CODEC app=libg7221codec ../../lib/libg7221codec-x86_64-unknown-linux-gnu.a make[3]: Entering directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/g7221' make[3]: `../../lib/libg7221codec-x86_64-unknown-linux-gnu.a' is up to date. make[3]: Leaving directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/g7221' make[2]: Leaving directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/g7221' make[2]: Entering directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/srtp' make -f /home/osboxes/Downloads/pjproject-2.7/build/rules.mak APP=SRTP app=libsrtp ../../lib/libsrtp-x86_64-unknown-linux-gnu.a make[3]: Entering directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/srtp' make[3]: `../../lib/libsrtp-x86_64-unknown-linux-gnu.a' is up to date. make[3]: Leaving directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/srtp' make[2]: Leaving directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/srtp' make[2]: Entering directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/resample' make -f /home/osboxes/Downloads/pjproject-2.7/build/rules.mak APP=RESAMPLE app=libresample ../../lib/libresample-x86_64-unknown-linux-gnu.a make[3]: Entering directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/resample' make[3]: `../../lib/libresample-x86_64-unknown-linux-gnu.a' is up to date. make[3]: Leaving directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/resample' make[2]: Leaving directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/resample' make[2]: Entering directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/yuv' make -f /home/osboxes/Downloads/pjproject-2.7/build/rules.mak APP=YUV app=libyuv ../../lib/libyuv-x86_64-unknown-linux-gnu.a make[3]: Entering directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/yuv' make[3]: `../../lib/libyuv-x86_64-unknown-linux-gnu.a' is up to date. make[3]: Leaving directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/yuv' make[2]: Leaving directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/yuv' make[2]: Entering directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/webrtc' make -f /home/osboxes/Downloads/pjproject-2.7/build/rules.mak APP=WEBRTC app=libwebrtc ../../lib/libwebrtc-x86_64-unknown-linux-gnu.a make[3]: Entering directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/webrtc' make[3]: `../../lib/libwebrtc-x86_64-unknown-linux-gnu.a' is up to date. make[3]: Leaving directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/webrtc' make[2]: Leaving directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build/webrtc' make[1]: Leaving directory `/home/osboxes/Downloads/pjproject-2.7/third_party/build' make[1]: Entering directory `/home/osboxes/Downloads/pjproject-2.7/pjmedia/build' make -f /home/osboxes/Downloads/pjproject-2.7/build/rules.mak APP=PJMEDIA app=pjmedia ../lib/libpjmedia-x86_64-unknown-linux-gnu.a make[2]: Entering directory `/home/osboxes/Downloads/pjproject-2.7/pjmedia/build'