C++ linker presentation

cpplinker/05_dynamic_linking/build.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+set -e
+
+echo "=== Compile with -fPIC for position-independent code ==="
+g++ -std=c++17 -fPIC -c vec.cpp -o vec.o
+g++ -std=c++17 -fPIC -c mat.cpp -o mat.o
+
+echo ""
+echo "=== Create shared library ==="
+g++ -shared vec.o mat.o -o libmymath.so
+echo "Created libmymath.so"
+
+echo ""
+echo "=== Symbols exported by the shared library ==="
+nm -C -D libmymath.so | grep -E "vec_|mat_"
+
+echo ""
+echo "=== Compile and link main dynamically ==="
+g++ -std=c++17 -c main.cpp -o main.o
+g++ main.o -L. -lmymath -Wl,-rpath,'$ORIGIN' -o app
+echo "Created app"
+
+echo ""
+echo "=== Runtime dependencies ==="
+ldd app
+
+echo ""
+echo "=== Run ==="
+./app