Compile Multiple C Files on Mac?

Question

I am new to C and using GCC. How do I compile multiple C files and then run them? I have multiple miles and each has different functions and they are supposed to run through the main.c file. My friend showed me through Windows but I am having issues figuring out how to do it on Mac.

What I was told: Compile both files individually first:

gcc -Wall -c .\main.c
gcc -Wall -c .\file.c

Then compile both together into an executable:

gcc -o program file.o main.o

Then run executable with .\program.exe

gcc -Wall -Wextra -Werror -pedantic -o program ./main.c ./file.c will build what you want in a single command. Beyond that, consider using a makefile or cmake (strongly advise the latter, btw). — WhozCraig
– WhozCraig, Commented Mar 8, 2022 at 3:23
The problem is the executable is not called program.exe on the mac, and the mac doesn't use backslashes as path separators. So the correct command is ./program not ./program.exe — user3386109
– user3386109, Commented Mar 8, 2022 at 3:25

Chris · Accepted Answer · 2022-03-08 03:24:07Z

2

You should probably investigate makefiles, but this is quite easy. The following should do the trick.

gcc -o program file.c main.c

Feel free to add in whichever -W warning flags you want.

Note also that Macs do not use \ as a directory separator but rather /, and executable files do not typically end in .exe.

answered Mar 8, 2022 at 3:24

Chris

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2 Comments

Conner Over a year ago

I'm still having issues compiling. I did: 'gcc main.c mealExpenses.c miscExpenses.c travelTime.c vehicleExpenses.c -o Program' and 'gcc -o program main.c mealExpenses.c miscExpenses.c travelTime.c vehicleExpenses.c' but no luck. Any suggestions?

Chris Over a year ago

Try having main.c be the last file listed. The order does matter.

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