Working with the Unix OS

Development Tools
CFLAGS = -Aa -O
INCLUDE = -I$(BASE)/include
LIBS = $(BASE)/lib/glib.a \
$(BASE)/lib/ulib.a
PROG
OBJS
= $(BASE)/bin/compsort
= main.a compare.o quicksort.o \ rankorder.o
$(PROG): $(OBJS)
@echo "linking ..."
@$(CC) $(CFLAGS) -o $(PROG) $(OBJS) $(LIBS)
@echo "Done"
$(OBJS): compare.h
$(CC) $(CFLAGS) $(INCLUDE) -c $*.c
# --------------------------------------------------
TOUCH
Allows you to change dates on individual files
/* Example C program to demonstrate the make utility */
/* convert tabs in standard input to spaces in
standard output while maintaining columns */
/*
* $ cc tabs.c OR $ make tabs
* $ a.out $ tabs
* Four components of compilation process:
* Preprocessor
* Compiler
* Assembler
* Link Editor
*/
/* preprocessor directives */
# include redefine TABSIZE 8
/* prototypes */
int findstop(int col);
main()
{
int c; /* char read from stdin */
int posn=0; /* column position of char */
int inc; /* column increment to tab stop */
}
while ((c = getchar()) != EOF){
switch(c){
case '\t': /* c is a tab */
inc = findstop(posn);
posn += inc;
for (; inc > 0; inc--)
putchar(' ');
break;
case '\n': /* c is a newline */
putchar(c);
posn = 0;
break;
default: /* c is anything else */
putchar(c);
posn++;
break;
}
}
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