Make label with different name's other than label.c

Question

My question is why I cannot simply make a different version of label.c with another file name? Let's say I save it as labelTest1.c; I get this error:

jharvard@appliance (~/Dropbox/src5m): make labelTest1
clang -ggdb3 -O0 -std=c99 -Wall -Werror    labelTest1.c   -lcs50 -lm -o labelTest1
labelTest1.c:14:10: fatal error: 'gobjects.h' file not found

All .h files are in the same directory, same as label.c.

Here is a screen shot.

Answer 1

To make with different file name, we have to add a line into Makefile that is inside the same directory for example in my case:

labelTest1: labelTest1.c Makefile

clang -ggdb3 -Ispl/include -O0 -std=c99 -Wall -Werror -o labelTest1 labelTest1.c -Lspl/lib -lcs -lm  

See a screenshot:

Here is the screenshot when I run with make labelTest1.c

Answer 2

The cause of the error is that the compiler is unable to locate the gobjects.h header file. This file resides in the spl/include folder.

The other programs, such as label and breakout, can be compiled because the makefile instructions for the compiler (actually the pre-processor) on where to locate the .h files. You can see this working when you run make label, the command that executes is:

clang -ggdb -Ispl/include -O0 -std=c99 -Wall -Werror -o label label.c -Lspl/lib -lcs -lm

The relevant parts here are:

1. -Ispl/include: Inform the pre-processor on where to look for additional .h files, including gobjects.h.
2. -Lspl/lib: Instructs the linker to link in the spell binary code.

Notice that when you run make labelTest1, the above are not included, and so the pre-processor and the linker have no way of knowing where to find the relevant SPL headers and library file.