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Full Discussion: GNU make doesn't pick up changes
Top Forums Shell Programming and Scripting GNU make doesn't pick up changes Post 302524649 by pludi on Tuesday 24th of May 2011 06:32:34 AM
Old 05-24-2011
GNU make doesn't pick up changes
It's been a while since I had to write a Makefile, but I've managed to clobber this together:
Code:
SRC=module1.c module2.c
OBJS=$(SRC:%.c=%.o)
HDR=include1.h include2.h

CC=gcc
CFLAGS=-Wall -ggdb -D_XOPEN_SOURCE -I. -ansi

all: program

program: $(OBJS)
        $(CC) $(CFLAGS) -o $@ $(OBJS)

.o: $(@:%.o=%.c) $(HDR)
        $(CC) $(CFLAGS) -c $<

clean:
        rm -f program $(OBJS)

It works for the most part, except when a change in one of the includes happens, result in make telling me "nothing to do".
Code:
$ make
gcc -Wall -ggdb -D_XOPEN_SOURCE -I. -ansi   -c -o module1.o module1.c
gcc -Wall -ggdb -D_XOPEN_SOURCE -I. -ansi   -c -o module2.o module2.c
gcc -Wall -ggdb -D_XOPEN_SOURCE -I. -ansi -o program module1.o module2.o
$ touch include1.h
$ touch include2.h
$ make
make: Nothing to be done for `all'.
$ touch module1.c
$ make
gcc -Wall -ggdb -D_XOPEN_SOURCE -I. -ansi   -c -o module1.o module1.c
gcc -Wall -ggdb -D_XOPEN_SOURCE -I. -ansi -o program module1.o module2.o
$

Both include?.h files are used in both module?.c files. I probably screwed up the prerequisite part of the target definition, but for the love of the FSM, I can't find it.

All files reside on a ext3 LV, without any special time-keeping options altered.

Any help would be greatly appreciated.
 

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LEARN ABOUT DEBIAN

gnulib-tool

GNULIB-TOOL(1)						      GNU Portability Library						    GNULIB-TOOL(1)

NAME

       gnulib-tool - program for authors or maintainers which want to import modules from gnulib into their packages.

SYNOPSIS

       gnulib-tool --list

       gnulib-tool --import [module1 ... moduleN]

       gnulib-tool --update

       gnulib-tool --create-testdir --dir=directory module1 ... moduleN

       gnulib-tool --create-megatestdir --dir=directory [module1 ... moduleN]

       gnulib-tool --test --dir=directory module1 ... moduleN

       gnulib-tool --megatest --dir=directory [module1 ... moduleN]

       gnulib-tool --extract-description module

       gnulib-tool --extract-filelist module

       gnulib-tool --extract-dependencies module

       gnulib-tool --extract-autoconf-snippet module

       gnulib-tool --extract-automake-snippet module

       gnulib-tool --extract-include-directive module

       gnulib-tool --extract-license module

       gnulib-tool --extract-maintainer module

       gnulib-tool --extract-tests-module module

DESCRIPTION

       The  GNU  portability  library  is  a  macro system and C declarations and definitions for commonly-used API elements and abstracted system
       behaviors. It can be used to improve portability and other functionality in your programs.

OPTIONS

       Operation modes:

       --list print the available module names.

       --import
	      import the given modules into the current package; if no modules are specified, update the current package from the current gnulib.

       --update
	      update the current package, restore files omitted from CVS.

       --create-testdir
	      create a scratch package with the given modules.

       --create-megatestdir
	      create a mega scratch package with the given modules one by one and all together.

       --test test the combination of the given modules (recommended to use CC="gcc -Wall" here).

       --megatest
	      test the given modules one by one and all together (recommended to use CC="gcc -Wall" here).

       --extract-description
	      extract the description.

       --extract-filelist
	      extract the list of files.

       --extract-dependencies
	      extract the dependencies.

       --extract-autoconf-snippet
	      extract the snippet for configure.ac.

       --extract-automake-snippet
	      extract the snippet for lib/Makefile.am.

       --extract-include-directive
	      extract the #include directive.

       --extract-license
	      report the license terms of the source files under lib/.

       --extract-maintainer
	      report the maintainer(s) inside gnulib.

       --extract-tests-module
	      report the unit test module, if it exists.

       Options:

       --dir=DIRECTORY
	      specify the target directory. For --import, this specifies where your configure.ac can be found. Defaults to current directory.

       --lib=LIBRARY
	      Specify the library name. Defaults to 'libgnu'.

       --source-base=DIRECTORY
	      Directory relative --dir where source code is placed (default "lib"), for --import.

       --m4-base=DIRECTORY
	      Directory relative --dir where *.m4 macros are placed (default "m4"), for --import.

       --tests-base=DIRECTORY
	      Directory relative --dir where unit tests are placed (default "tests"), for --import.

       --aux-dir=DIRECTORY
	      Directory relative --dir where auxiliary build tools are placed (default "build-aux").

       --with-tests
	      Include unit tests for the included modules.

       --avoid=MODULE
	      Avoid including the given MODULE. Useful if you have code that provides equivalent functionality. This option can be repeated.

       --lgpl Abort if modules aren't available under the LGPL. Also modify license template from GPL to LGPL.

       --libtool
	      Use libtool rules, for --import.

       --macro-prefix=PREFIX
	      Specify the prefix of the macros 'gl_EARLY' and 'gl_INIT'. Default is 'gl'.

       --no-changelog
	      don't update or create ChangeLog files.

       --dry-run
	      For --import, only print what would have been done.

       -s, --symbolic, --symlink
	      Make symbolic links instead of copying files.

       -h, --help
	      Show summary of options.

BUGS

       Report bugs to <bug-gnulib@gnu.org>.

SEE ALSO

       check-module(1).

AUTHOR

       gnulib was written by the Free Software Foundation and others (sources of various origins).

       This manual page was written by Daniel Baumann <daniel@debian.org>, for the Debian project (but may be used by others).

0.0.20060601							    2006-06-01							    GNULIB-TOOL(1)
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