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Full Discussion: bash script to compile multiple .c files with some options
Top Forums Shell Programming and Scripting bash script to compile multiple .c files with some options Post 302497059 by caruccio on Wednesday 16th of February 2011 08:22:38 AM
Old 02-16-2011
As pludi said, makefiles are great for this kind of job.
What you have is: to to create something, this otherthing must be done before.

A common place on source compilation is:
I need to build the executable, but first I need to build each individual object. Than I link all objects to produce an executable.

The beauty on Makefiles is that it "knowns" your source file has changed and build only that single file you need.

Code:
$ cat Makefile

PROJECT = MyProject
EXECUTABLE = MyProgram
SOURCE = file1.c file2.c file3.c
OBJECTS = file1.o file2.o file3.o
#This is an easier way to define OBJECTS:
#OBJECTS = $(OBJECTS:%.c=%.o)

help:
   echo Here is a help message

# Prior to "backup", make will run "clean".
backup: clean
   cd .. && tar czvf /backup/$(PROJECT).tar.gz $(PROJECT)

clean:
   rm -f $(OBJECTS) $(EXECUTABLE)

CFLAGS = -Wall -ggdb3 -DSOME_DEFINE=1
LDFLAGS = -L/usr/local/lib -lsomelibname

# All the magic is here

# This is your main target, which depends upon target "program",
# you executable file.

all: $(EXECUTABLE)

# To build "$(EXECUTABLE)", you first need to build all separeted object file,
# i.e., each of your .c file must produce a corresponding .o file
# The special variable $@ means "the target name". On this case, it is "$(EXECUTABLE)'s value"
# The special variable $^ means "all depend targets". On this case, it is $(OBJECTS)'s value

$(EXECUTABLE): $(OBJECTS)
   gcc $(LDFLAGS) $(CFLAGS) -o $@ $^

# This is where any .c file becomes .o file

%.o: %.c
   gcc $(CFLAGS) -c $^ -o $@

You can now run:
Code:
$ make all

if you update file2.c, make sees it's timestamp is newer than corresponding file2.o and recompiles it, then relinks it into your executable.

To cleanup all objects:
Code:
$ make clean

And so on...
Code:
$ make help
$ make backup

Nice, uh?

PS: That makefile was not tested, probably have some problems.
 

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LEARN ABOUT DEBIAN

libbash

LIBBASH(7)							  libbash Manual							LIBBASH(7)

NAME

     libbash -- A bash shared libraries package.

DESCRIPTION

     libbash  is  a package that enables bash dynamic-like shared libraries. Actually its a tool for managing bash scripts whose functions you may
     want to load and use in scripts of your own.

     It contains a 'dynamic loader' for the shared libraries ( ldbash(1)), a configuration tool (ldbashconfig(8)), and some libraries.

     Using ldbash(1) you are able to load loadable bash libraries, such as getopts(1) and hashstash(1).  A bash shared library that can be  loaded
     using
     ldbash(1) must answer 4 requirments:

     1.     It must be installed in $LIBBASH_PREFIX/lib/bash (default is /usr/lib/bash).

     2.     It must contain a line that begins with '#EXPORT='.  That line will contain (after the '=') a list of functions that the library
	    exports.  I.e. all the function that will be usable after loading that library will be listed in that line.

     3.     It must contain a line that begins with '#REQUIRE='.  That line will contain (after the '=') a list of bash libraries that are
	    required for our library.  I.e. every bash library that is in use in our bash library must be listed there.

     4.     The library must be listed (For more information, see ldbashconfig(8)).

   Basic guidelines for writing library of your own:
     1.     Be aware, that your library will be actually sourced. So, basically, it should contain (i.e define) only functions.

     2.     Try to declare all variables intended for internal use as local.

     3.     Global variables and functions that are intended for internal use (i.e are not defined in '#EXPORT=') should begin with:
		  __<library_name>_
	    For example, internal function myfoosort of hashstash library should be named as
		  __hashstash_myfoosort
	    This helps to avoid conflicts in global name space when using libraries that come from different vendors.

     4.     See html manual for full version of this guide.

AUTHORS

     Hai Zaar <haizaar@haizaar.com>
     Gil Ran <ril@ran4.net>

SEE ALSO

     ldbash(1), ldbashconfig(8), getopts(1), hashstash(1) colors(1) messages(1) urlcoding(1) locks(1)

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