Simulate GCC and Clang compilation logs with preprocessing, object file creation, and linking stages. Generate realistic C/C++ build output for testing and documentation.
Press Ctrl + C to exit. Output is simulated for demo purposes only.
This module simulates compiler flags, object files, and link stage log events with realistic pacing.
It is designed for demos, log pipeline testing, and documentation where the real stack is unavailable.
All output is generated locally in the browser and is safe to run.
gcc -c -O2 -Wall -Iinclude -DDEBUG -o src/main.o src/main.c gcc -c -O2 -Wall -Iinclude -DDEBUG -o src/utils.o src/utils.c gcc -o app src/main.o src/utils.o -lm clang -c -O2 -Wall -Iinclude -o src/net.o src/net.c
No. It is a simulator that prints log text only.
Yes. The CLI supports speed and repeat options, and the web page can be refreshed.
No. It does not install, update, or modify anything.
C and C++ compilers (gcc, clang) emit lines for each translation unit: compile, link, and optional warnings. Build systems capture this for CI and logs.
This simulator reproduces that style so you can test log processors or demo build pipelines without compiling real code.
Popular questions and answers from Stack Overflow related to C/C++ compiler.
Use the -g flag: gcc -g -o program program.c. For more detailed info use -g3. To also include optimization: gcc -g -O2 -o program program.c. Debug with gdb or lldb.
Use -l flag for library name and -L for library path: gcc -o program program.c -L/path/to/lib -lmylib. For standard math library: gcc -o calc calc.c -lm
gcc compiles C by default, g++ compiles C++. g++ automatically links C++ standard library. gcc can compile C++ with -lstdc++. For C++ code, prefer g++ to avoid missing library issues.
Use -Wall for common warnings. Add -Wextra for more warnings. -Wpedantic for strict ISO compliance. -Werror treats warnings as errors. Example: gcc -Wall -Wextra -Werror -o prog prog.c
-O0: no optimization (fast compile, debug). -O1: basic optimization. -O2: recommended for release (good balance). -O3: aggressive (may increase code size). -Os: optimize for size. -Ofast: O3 + fast-math.
Means function declared but not defined. Check: 1) Implementation exists, 2) Library is linked (-l flag), 3) Order matters - libraries after objects using them, 4) Correct library path (-L flag).
Static: ar rcs libfoo.a foo.o bar.o, link with -static. Shared: gcc -shared -fPIC -o libfoo.so foo.c, link with -L. -lfoo. Shared libraries need -fPIC for position independent code.
Compile with -fsanitize=address -g. Run program normally - it reports memory errors at runtime. Also available: -fsanitize=undefined, -fsanitize=thread. Significant slowdown but catches many bugs.
-fPIC generates Position Independent Code, required for shared libraries so they can be loaded at any address. Use when creating .so files. Not needed for executables or static libraries.
Use -std flag: -std=c89, -std=c99, -std=c11, -std=c17. For GNU extensions: -std=gnu11. Default varies by GCC version. Check with: gcc -v. Specify explicitly for portability.
Popular video tutorials to learn more about C/C++ compiler.
freeCodeCamp.org
Comprehensive C programming tutorial including GCC compiler usage, Makefiles, debugging with GDB, and memory management.
Watch on YouTubeThe Cherno
Deep dive into compilation stages: preprocessing, compilation, assembly, and linking. Learn how object files become executables.
Watch on YouTube
