CODEWITHSUNDEEP
makefile
yuan
yuan

Reputation: 327

What's the possible reason that makefile would skip making one executable?

I try to then execute exact same compilation command for that skipped file and it is being correctly compiled. But when I put it in make file it is just skipped. Every other file is generated.

Upvotes: 1

Views: 1861

Answers (1)

paxdiablo
paxdiablo

Reputation: 881653

Without actually seeing the makefile (which you haven't provided), we can only guess (though I'd like to think it's an educated guess).

Since make works by checking file timestamps to see if they need rebuilding, that's one thing to look at. If the timestamp of a target is later than that of all dependencies, the target won't be built.

The other is to ensure your top level rule actually has a dependency on what you're trying to build, somewhere in the hierarchy. By that I mean the ruleset:

all: xyzzy

xyzzy:
    touch xyzzy

plugh:
    touch plugh

with the command make all will never touch plugh because it's not in the dependency hierarchy off all.

And make generally provides command line options for debugging (like the -d flag in GNU Make) which will tell you why it's making the decisions it's making. If you want to understand what's happening, you should probably use them,a s it makes it that much easier to debug your makefile.

Upvotes: 1

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