Perl Script to Generate Makefile

Download here. createmakefile.pdf

#!/usr/bin/perl
# File name: writemake.pl
# Author: A.G.Raja
# Website: agraja.wordpress.com
# License: GPL
 

use strict;
use warnings;
open(FH,">Makefile") or die "Cannot create Makefile";
print FH ("all: buildnn");
print FH ("build: " . $ARGV[0] .".onn");
print FH ("shared: " . $ARGV[0] . ".sonn");
print FH ("clean: n");
print FH ("trm ".$ARGV[0].".*o nn");

print FH ($ARGV[0].".o: ".$ARGV[0].".cn");
print FH ("tgcc -o ".$ARGV[0].".o ".$ARGV[0].".cnn");

print FH ($ARGV[0].".so: ".$ARGV[0].".cn");
print FH ("tgcc -fPIC -shared -o ".$ARGV[0].".so ".$ARGV[0].".cn");
close FH;
# Usage:
# chmod +x writemake.pl
# writenake.pl hello
 
Below is the Makefile generated:

all: build

build: hello.o

shared: hello.so

clean:
rm hello.*o

hello.o: hello.c
gcc -o hello.o hello.c

hello.so: hello.c
gcc -fPIC -shared -o hello.so hello.c

Download here. createmakefile.pdf

GCC Include Files Path

GCC looks in several different places for headers.

On a normal Unix system, if you do not instruct it otherwise, it will look for headers requested with #include <file> in:

/usr/local/include

libdir/gcc/target/version/include
/usr/target/include

/usr/include

You can add to this list with the -Idir command line option.

Below is a small demo

///////////     defines.c   ////////

#include <stdio.h>

#include <defines.h>

int main()

begin

    printf("hellon");

    return 0;

end

This requires the folowing header file

///////     headers/defines.h   ///////////

#define begin {

#define end }

//////  save this file in directory named headers

Compile defines.c as below

[raja@AGRAJA ~] gcc defines.c -Iheaders