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makefile
manglano
manglano

Reputation: 844

Make can find specified target, Makefile cannot

Learning C the Hard Way, coding up my first makefile. The makefile is in the directory with the C files "ex1.c" and ex3.c".

make ex1

compiles an executable "ex1" correctly. The Makefile contains:

all:
     ex1
     ex3

but calling "make" returns error

make: ex1: No such file or directory.
make: *** [all] Error 1

Why can make find the source code when specified as an arg but not when specified by the makefile?

Upvotes: 2

Views: 148

Answers (1)

Etan Reisner
Etan Reisner

Reputation: 80931

This snippet of makefile

all:
     ex1
     ex3

is telling make about one target all and that that target has two lines of recipe to run when the all target is requested.

So when you run make all (or make when all is the first/default target) make tries to run ex1 and ex3 as shell commands. Which clearly fails since they haven't been built yet.

Assuming you meant to tell make to build the ex1 and ex3 targets what you meant was

all: ex1 ex3

That all said for simple ex1.c -> ex1 compilation you don't even need a makefile at all. Which is why the book doesn't bother telling you to create one yet.

Upvotes: 3

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