# Makefile using wildcards in targets

CC = gcc
CFLAGS = -g -ansi -pedantic -Wall -O2

# Get all C source files in this directory with prefix pthread_*.
PTHREAD_TARGETS = $(patsubst %.c,%,$(wildcard pthread_*.c))

# The patsubst() function strips the .c extension from the filename.
# To compile for example 'pthread_hello.c', type 
# 'make pthread_hello' (without .c extension)

# Applying the same method for prefix math_*
MATH_TARGETS = $(patsubst %.c,%,$(wildcard math_*.c))

# 'pthread targets', add the -lpthread flag 
.PHONY : $(PTHREAD_TARGETS)
$(PTHREAD_TARGETS):
        @echo This target will be compiled with the -lpthread flag.
        $(CC) $(CFLAGS) $@.c -o $@ -lpthread

# 'math targets', add the -lm flag.
.PHONY : $(MATH_TARGETS)
$(MATH_TARGETS):
        @echo This target will be compiled with the -lm flag.
        $(CC) $(CFLAGS) $@.c -o $@ -lm

# Targets not matching any of the rules above will be compiled using the following implicit rule:
#       $(CC) $(CFLAGS) $@.c -o $@

# Remove object files, executables (UNIX/Windows), Emacs backup files, and core files
.PHONY : clean
clean:
        rm -rf  *.o *.exe *~ *.core core