c99:tldr:34b12
The command "c99 ${file-c} ${file-o}" is using the c99 compiler to compile a C source file.
Here is the breakdown of each component:
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"c99": This is the command to invoke the c99 compiler. The c99 compiler is a popular compiler for the C programming language.
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"${file-c}": This represents the name of the C source file that you want to compile. The "${file-c}" is a placeholder that should be replaced with the actual file name when executing the command. Note that the "-c" option specifies that the compiler should only perform the compilation step and not the linking step.
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"${file-o}": This represents the output object file name. The "${file-o}" is a placeholder that should be replaced with the desired name for the output file. The "-o" option specifies the name of the output file.