Update doc

doc/ORAN_FHI7.2_Tutorial.md

@@ -235,7 +235,7 @@ Download DPDK version 20.11.7.
 ```bash
 # on debian
 sudo apt install wget xz-utils
-# on fedora
+# on Fedora/RHEL
 sudo dnf install wget xz
 cd
 wget http://fast.dpdk.org/rel/dpdk-20.11.7.tar.xz
@@ -249,7 +249,7 @@ Note tht you can also use a more recent version of DPDK: `wget http://fast.dpdk.
 # Installing meson : it should pull ninja-build and compiler packages
 # on debian
 sudo apt install meson
-# on fedora
+# on Fedora/RHEL
 sudo dnf install meson
 tar xvf dpdk-20.11.7.tar.xz && cd dpdk-stable-20.11.7
 
@@ -277,7 +277,7 @@ sudo ldconfig -v | grep rte_
 ....
 ```
 
-On Fedora-based OS, you may not have the `/usr/local/lib` or `/usr/local/lib64` paths in the LD_LIBRARY_PATH:
+On Fedora/RHEL-based OS, you may not have the `/usr/local/lib` or `/usr/local/lib64` paths in the `LD_LIBRARY_PATH`:
 
 ```bash
 sudo echo "/usr/local/lib" > /etc/ld.so.conf.d/local-lib.conf
@@ -292,7 +292,7 @@ pkg-config --libs libdpdk --static
 -lrte_node -lrte_graph -lrte_bpf -lrte_flow_classify -lrte_pipeline -lrte_table -lrte_port -lrte_fib -lrte_ipsec -lrte_vhost -lrte_stack -lrte_security -lrte_sched -lrte_reorder -lrte_rib -lrte_rawdev -lrte_pdump -lrte_power -lrte_member -lrte_lpm -lrte_latencystats -lrte_kni -lrte_jobstats -lrte_ip_frag -lrte_gso -lrte_gro -lrte_eventdev -lrte_efd -lrte_distributor -lrte_cryptodev -lrte_compressdev -lrte_cfgfile -lrte_bitratestats -lrte_bbdev -lrte_acl -lrte_timer -lrte_hash -lrte_metrics -lrte_cmdline -lrte_pci -lrte_ethdev -lrte_meter -lrte_net -lrte_mbuf -lrte_mempool -lrte_rcu -lrte_ring -lrte_eal -lrte_telemetry -lrte_kvargs -Wl,--whole-archive -lrte_common_cpt -lrte_common_dpaax -lrte_common_iavf -lrte_common_octeontx -lrte_common_octeontx2 -lrte_bus_dpaa -lrte_bus_fslmc -lrte_bus_ifpga -lrte_bus_pci -lrte_bus_vdev -lrte_bus_vmbus -lrte_mempool_bucket -lrte_mempool_dpaa -lrte_mempool_dpaa2 -lrte_mempool_octeontx -lrte_mempool_octeontx2 -lrte_mempool_ring -lrte_mempool_stack -lrte_pmd_af_packet -lrte_pmd_ark -lrte_pmd_atlantic -lrte_pmd_avp -lrte_pmd_axgbe -lrte_pmd_bond -lrte_pmd_bnxt -lrte_pmd_cxgbe -lrte_pmd_dpaa -lrte_pmd_dpaa2 -lrte_pmd_e1000 -lrte_pmd_ena -lrte_pmd_enetc -lrte_pmd_enic -lrte_pmd_failsafe -lrte_pmd_fm10k -lrte_pmd_i40e -lrte_pmd_hinic -lrte_pmd_hns3 -lrte_pmd_iavf -lrte_pmd_ice -lrte_pmd_igc -lrte_pmd_ixgbe -lrte_pmd_kni -lrte_pmd_liquidio -lrte_pmd_memif -lrte_pmd_netvsc -lrte_pmd_nfp -lrte_pmd_null -lrte_pmd_octeontx -lrte_pmd_octeontx2 -lrte_pmd_pfe -lrte_pmd_qede -lrte_pmd_ring -lrte_pmd_sfc -lrte_pmd_softnic -lrte_pmd_tap -lrte_pmd_thunderx -lrte_pmd_vdev_netvsc -lrte_pmd_vhost -lrte_pmd_virtio -lrte_pmd_vmxnet3 -lrte_rawdev_dpaa2_cmdif -lrte_rawdev_dpaa2_qdma -lrte_rawdev_ioat -lrte_rawdev_ntb -lrte_rawdev_octeontx2_dma -lrte_rawdev_octeontx2_ep -lrte_rawdev_skeleton -lrte_pmd_caam_jr -lrte_pmd_dpaa_sec -lrte_pmd_dpaa2_sec -lrte_pmd_nitrox -lrte_pmd_null_crypto -lrte_pmd_octeontx_crypto -lrte_pmd_octeontx2_crypto -lrte_pmd_crypto_scheduler -lrte_pmd_virtio_crypto -lrte_pmd_octeontx_compress -lrte_pmd_qat -lrte_pmd_ifc -lrte_pmd_dpaa_event -lrte_pmd_dpaa2_event -lrte_pmd_octeontx2_event -lrte_pmd_opdl_event -lrte_pmd_skeleton_event -lrte_pmd_sw_event -lrte_pmd_dsw_event -lrte_pmd_octeontx_event -lrte_pmd_bbdev_null -lrte_pmd_bbdev_turbo_sw -lrte_pmd_bbdev_fpga_lte_fec -lrte_pmd_bbdev_fpga_5gnr_fec -Wl,--no-whole-archive -lrte_node -lrte_graph -lrte_bpf -lrte_flow_classify -lrte_pipeline -lrte_table -lrte_port -lrte_fib -lrte_ipsec -lrte_vhost -lrte_stack -lrte_security -lrte_sched -lrte_reorder -lrte_rib -lrte_rawdev -lrte_pdump -lrte_power -lrte_member -lrte_lpm -lrte_latencystats -lrte_kni -lrte_jobstats -lrte_ip_frag -lrte_gso -lrte_gro -lrte_eventdev -lrte_efd -lrte_distributor -lrte_cryptodev -lrte_compressdev -lrte_cfgfile -lrte_bitratestats -lrte_bbdev -lrte_acl -lrte_timer -lrte_hash -lrte_metrics -lrte_cmdline -lrte_pci -lrte_ethdev -lrte_meter -lrte_net -lrte_mbuf -lrte_mempool -lrte_rcu -lrte_ring -lrte_eal -lrte_telemetry -lrte_kvargs -Wl,-Bdynamic -pthread -lm -ldl
 ```
 
-Once again on Fedora-based OS, you may not have the `/usr/local/lib` or `/usr/local/lib64` paths in the PKG_CONFIG_PATH:
+Once again on Fedora/RHEL-based OS, you may not have the `/usr/local/lib` or `/usr/local/lib64` paths in the PKG_CONFIG_PATH:
 
 ```bash
 export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib64/pkgconfig/
@@ -354,47 +354,34 @@ git apply oaioran_E.patch
 
 ### 2.1.3. Build (valid for any release)
 
-Set up the environment (change the path if you use different folders). We recommend you copy all variables in a file and then you source that file everytime you compile the source code.
-
-```bash
-export XRAN_LIB_DIR=~/phy/fhi_lib/lib/build
-export XRAN_DIR=~/phy/fhi_lib
-export RTE_SDK=~/dpdk-stable-20.11.7
-export RTE_TARGET=x86_64-native-linuxapp-gcc
-export RTE_INCLUDE=/usr/local/include
-```
-
-Compile Fronthaul Interface Library
+Compile the fronthaul interface library by calling `make` and the option
+`XRAN_LIB_SO=1` to have it build a shared object. Note that we provide two
+environment variables `RTE_SDK` for the path to the source tree of DPDK, and
+`XRAN_DIR` to set the path to the fronthaul library.
 
 ```bash
 cd ~/phy/fhi_lib/lib
 make clean
-make XRAN_LIB_SO=1
+RTE_SDK=~/dpdk-stable-20.11.7/ XRAN_DIR=~/phy/fhi_lib make XRAN_LIB_SO=1
 ...
 [AR] build/libxran.so
 ./build/libxran.so
 ```
 
-The shared library object `~/phy/fhi_lib/lib/build` SHALL be generated.
-
-Copy it to `/usr/local/lib`:
-
-```bash
-sudo cp ~/phy/fhi_lib/lib/build/libxran.so /usr/local/lib
-sudo ldconfig -v | grep libxran
-	libxran.so -> libxran.so
-```
+The shared library object `~/phy/fhi_lib/lib/build/libxran.so` must be present
+before proceeding.
 
 ## 2.2 Build OAI gNB
 
 ```bash
-# You should have already cloned above and switched to the proper branch.
+# You should have already cloned above
 cd ~/openairinterface5g/cmake_targets
 # on debian
 sudo apt install -y libnuma-dev
 # on RHEL
 sudo dnf install -y numactl-devel
 ./build_oai --gNB --ninja -t oran_fhlib_5g (Add, -I if you are building for the first time on server for installing external dependencies)
+PKG_CONFIG_PATH=/opt/dpdk/lib64/pkgconfig/ cmake .. -GNinja -DOAI_ETHERNET=ON -Dxran_LOCATION=/home/richie/src/phy-new/fhi_lib/lib # alternative
 #check if all the libraries are properly linked to liboai_transpro.so
 ldd ran_build/build/liboran_fhlib_5g.so
     linux-vdso.so.1 (0x00007ffc9bdfc000)