Add examples for different utilities

cpplinker/cpp_linkers.md

@@ -239,21 +239,26 @@ g++ main.cpp wrapper.cpp -lsqlite3 -o app
 
 ```bash
 # Inspect symbols
-nm -C -g lib.a           # demangled, global symbols only
-nm -u main.o             # undefined (unresolved) symbols
-objdump -d my.o          # disassembly
-readelf -s my.o          # ELF symbol table
+nm -C -g libmath.a                        # demangled, global symbols only
+nm -u main.o                              # undefined (unresolved) symbols
+objdump -d math_lib.o                     # disassembly
+readelf -s math_lib.o                     # ELF symbol table
 
 # Trace linker decisions
-g++ main.o -lmylib -Wl,--verbose 2>&1 | grep "attempt"
-ld --trace my.o          # shows each file the linker considers
+g++ main.o -L. -lmath -Wl,--verbose 2>&1 | grep "attempt"
+ld --trace math_lib.o                     # shows each file the linker considers
 
 # Check shared lib deps
 ldd ./app
-chrpath -l ./app         # show embedded RPATH
+chrpath -l ./app                          # show embedded RPATH
+# fallback if chrpath is not installed:
+readelf -d ./app | grep -E 'RPATH|RUNPATH'
 
 # Demangle a mangled symbol
-c++filt _ZN4Math4sqrtEd  # → Math::sqrt(double)
+c++filt _ZN4Math4sqrtEd                   # → Math::sqrt(double)
+
+# Pipe nm output through c++filt to demangle all symbols at once
+nm -g libmath.a | grep " T " | awk '{print $NF}' | c++filt
 ```
 
 **Useful flags:**