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+# ltrace(1)
+
+```markdown
+ltrace [opts] [prg]
+  -f .......... follow child processes on fork(2)
+  -p <pid> .... attach to running process
+  -o <file> ... log output into <file>
+  -l <filter> . show who calls into lib matched by <filter>
+  -C .......... demangle
+```
+
+# Example
+
+List which program/libs call into `libstdc++`:
+```bash
+ltrace -l '*libstdc++*' -C -o ltrace.log ./main
+```