CODEWITHSUNDEEP
c
Paul D. Waite
Paul D. Waite

Reputation: 98906

How do you compile a C program?

This might be the most newbie question ever, but how do you compile a C program?

I’ve downloaded the source of a C program (ffmpeg, to be precise). How do I compile it?

Upvotes: 1

Views: 339

Answers (4)

kagali-san
kagali-san

Reputation: 3082

to compile simple math program, it's not enough to <include math.h>. See

gcc file.c -lmath -o program_bin

for a single .c file using ffmpeg libraries, it can be made this way:

gcc -Wall -g live_segmenter.c -o live_segmenter -lavformat -lavcodec -lavutil -lbz2 -lm -lz -lfaac -lmp3lame -lx264 -lfaad -lpthread -I/home/devicer/ffmpeg/include -L/home/devicer/ffmpeg/lib

notice -L and -I options. In serious projects they are usually set by pkg-config.

for the ffmpeg itself.. - install lame, few other required libraries, then do as Chris said. Btw, sometimes it requires gmake, not make.

Also, have a look on

./configure --prefix /home/devicer/ffmpeg

This is what was mentioned (used for) in segmenter compilation above.

Upvotes: 1

Martin Beckett
Martin Beckett

Reputation: 96167

For a single file just cc file.c (or gcc or whatever you C compiler is called)

For a complex project like ffmpeg, then either make, cmake, configure some other. Check their documentation

Upvotes: 2

Paul R
Paul R

Reputation: 213170

It depends on what OS and compilers you have, but typically the sequence is:

$ ./configure
$ make
$ sudo make install

Upvotes: 1

C. K. Young
C. K. Young

Reputation: 223183

For most Unix-style C programs, the incantation is:

./configure
make
sudo make install

This should already be documented in the INSTALL file, which additionally may contain further useful information.

Upvotes: 5

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