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Old 07-02-2008
Makefile

I am writing my first makefile, and I face a problem:

Code:
all: sequential pthreads1 pthreads2 openmp1 openmp2

sequential: sequential/main.c sequential/definitions.h
	gcc -o seq sequential/main.c

pthreads1: pthreads1/main.c pthreads1/definitions.h
	gcc -o pthr1 pthreads1/main.c -lpthread

pthreads2: pthreads2/main.c pthreads2/definitions.h
	gcc -o pthr2 pthreads2/main.c -lpthread

openmp1: openmp1/main.c openmp1/definitions.h
	gcc -o open1 openmp1/main.c -fopenmp

openmp2: openmp2/main.c openmp2/definitions.h
	gcc -o open2 openmp2/main.c -fopenmp

clean:
	rm -f seq pthr1 pthr2 open1 open2

force:
	cd sequential; touch *
	cd pthreads1; touch *
	cd pthreads2; touch *
	cd openmp1; touch *
	cd openmp2; touch *
	make all

Why make force doesn't compile openmp2?

EDIT: Problem solved. I had forgotten to put the lines in bold.

Last edited by myle; 07-02-2008 at 02:53 PM..
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gccmakedep(1)						      General Commands Manual						     gccmakedep(1)

NAME
gccmakedep - create dependencies in makefiles using 'gcc -M' SYNOPSIS
gccmakedep [ -sseparator ] [ -fmakefile ] [ -a ] [ -- options -- ] sourcefile ... DESCRIPTION
The gccmakedep program calls 'gcc -M' to output makefile rules describing the dependencies of each sourcefile, so that make(1) knows which object files must be recompiled when a dependency has changed. By default, gccmakedep places its output in the file named makefile if it exists, otherwise Makefile. An alternate makefile may be speci- fied with the -f option. It first searches the makefile for a line beginning with # DO NOT DELETE or one provided with the -s option, as a delimiter for the dependency output. If it finds it, it will delete everything following this up to the end of the makefile and put the output after this line. If it doesn't find it, the program will append the string to the makefile and place the output after that. EXAMPLE
Normally, gccmakedep will be used in a makefile target so that typing 'make depend' will bring the dependencies up to date for the make- file. For example, SRCS = file1.c file2.c ... CFLAGS = -O -DHACK -I../foobar -xyz depend: gccmakedep -- $(CFLAGS) -- $(SRCS) OPTIONS
The program will ignore any option that it does not understand, so you may use the same arguments that you would for gcc(1), including -D and -U options to define and undefine symbols and -I to set the include path. -a Append the dependencies to the file instead of replacing existing dependencies. -fmakefile Filename. This allows you to specify an alternate makefile in which gccmakedep can place its output. Specifying "-" as the file name (that is, -f-) sends the output to standard output instead of modifying an existing file. -sstring Starting string delimiter. This option permits you to specify a different string for gccmakedep to look for in the makefile. The default is "# DO NOT DELETE". -- options -- If gccmakedep encounters a double hyphen (--) in the argument list, then any unrecognized arguments following it will be silently ignored. A second double hyphen terminates this special treatment. In this way, gccmakedep can be made to safely ignore esoteric compiler arguments that might normally be found in a CFLAGS make macro (see the EXAMPLE section above). -D, -I, and -U options appearing between the pair of double hyphens are still processed normally. SEE ALSO
gcc(1), make(1), makedepend(1). AUTHOR
The version of the gccmakedep included in this X.Org Foundation release was originally written by the XFree86 Project based on code sup- plied by Hongjiu Lu. Colin Watson wrote this manual page, originally for the Debian Project, based partly on the manual page for makedepend(1). X Version 11 gccmakedep 1.0.2 gccmakedep(1)