c99

Compile a C source file to an executable

$ c99 [file.c] -o [output]

$ c99 -c [file.c]

$ c99 [file.c] -l[library] -o [output]

$ c99 -D [NAME=value] [file.c] -o [output]

$ c99 -I [path/to/includes] [file.c] -o [output]

$ c99 -O [file.c] -o [output]

c99 [-c] [-D name[=value]...] [-E] [-g] [-I directory...] [-L directory...] [-o outfile] [-O optlevel] [-s] [-U name...] operand...

c99 is the POSIX-standard interface to the C compilation system for compiling C99-conformant source code. It compiles C source files and links them to produce an executable file, or can produce object files for later linking.
The command accepts source files (.c), object files (.o), and library archives (.a) as operands. Without the -o option, the executable is written to a.out.

-c

Compile only; do not link. Produces object files (.o)

Define preprocessor macro

Preprocess only; do not compile

Include debugging information

Add directory to header search path

Add directory to library search path

Link with specified library

Write output to specified file

Enable optimization (0, 1, 2, 3)

Strip symbols from output

Undefine preprocessor macro

The c99 command may not be available on all systems; it is required only on systems providing the POSIX C-Language Development option. On Linux, it typically invokes gcc or clang with appropriate flags for C99 compliance.

The c99 utility was introduced in IEEE Std 1003.1-2001 (POSIX.1-2001), based on the earlier c89 utility from ISO POSIX-2:1993. It reflects updates to support the ISO/IEC 9899:1999 C standard (C99).

gcc(1), clang(1), make(1), ld(1)