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Full Discussion: Dependencies problem GNU automake
Top Forums Programming Dependencies problem GNU automake Post 302281311 by Corona688 on Wednesday 28th of January 2009 03:02:39 PM
Old 01-28-2009
Quote:
Originally Posted by hembergb
Unfortunately, I have always had someone else to do the make files for my previous projects so I don't know how to create one for myself. That's why I thought the GNU tool would be ideal - it looks to me I just have to add a couple of parameters and the rest is done for me.
That was my intention when I used to use kdevelop, but it turns out that automake was finicky, impenetrable, slow(most projects can be compiled in their entirety several times over in the time configure spends checking the same things it checked the last 9000 times it ran), gigantic(probably larger than your project by a factor of ten or more), too often broke down for no good reason, inflexible(uh-oh, I need to add a new library -- time to regenerate my project from scratch!)... automake's next version upgrade obliterated all my projects when their scripts broke compatibility, forcing me to either recreate everything from scratch or just buckle down and learn makefiles already.

Makefiles turned out to be easy. autoconf just makes them look hard because it's so enormous and takes so many steps and spews so much clutter to do so little.

All a makefile does, is describe what files to turn into what files. It already has built-in rules to do most of what else you need. Here's a short example makefile that can transform a.cpp through f.cpp into 'executable' just by running 'make'.

Code:
# This file must be named Makefile and placed in the same dir as a.cpp through f.cpp

# The list of object files.  We don't need to tell it a.cpp, since
# make knows .o can be made from .c or .cpp and will search for it.
OBJS=a.o b.o c.o d.o e.o f.o

# Compiler flags go here.
CFLAGS=
# C++ specific compiler flags go here.  CFLAGS gets copied in.
CXXFLAGS=$(CFLAGS)
# Linker flags go here.  For example, let's link in the math library.
LDFLAGS=-lm

# Here we tell make that it needs a.o through f.o to build 'executable'.
# If it doesn't find them, it will build them.
# Note that there is a TAB in front of g++, not eight spaces.
executable:$(OBJS)
        g++ $(OBJS) $(LDFLAGS) -o executable
# Running 'make clean' will cause it to delete the objects and executable.
clean:
        rm -f $(OBJS) executable

 

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LEARN ABOUT FREEBSD

automake

AUTOMAKE(1)							   User Commands						       AUTOMAKE(1)

NAME

       automake - manual page for automake 1.15.1

SYNOPSIS

       automake-1.15 [OPTION]... [Makefile]...

DESCRIPTION

       Generate Makefile.in for configure from Makefile.am.

   Operation modes:
       --help print this help, then exit

       --version
	      print version number, then exit

       -v, --verbose
	      verbosely list files processed

       --no-force
	      only update Makefile.in's that are out of date

       -W, --warnings=CATEGORY
	      report the warnings falling in CATEGORY

   Dependency tracking:
       -i, --ignore-deps
	      disable dependency tracking code

       --include-deps
	      enable dependency tracking code

   Flavors:
       --foreign
	      set strictness to foreign

       --gnits
	      set strictness to gnits

       --gnu  set strictness to gnu

   Library files:
       -a, --add-missing
	      add missing standard files to package

       --libdir=DIR
	      set directory storing library files

       --print-libdir
	      print directory storing library files

       -c, --copy
	      with -a, copy missing files (default is symlink)

       -f, --force-missing
	      force update of standard files

   Warning categories include:
       gnu    GNU coding standards (default in gnu and gnits modes)

       obsolete
	      obsolete features or constructions

       override
	      user redefinitions of Automake rules or variables

       portability
	      portability issues (default in gnu and gnits modes)

       extra-portability
	      extra portability issues related to obscure tools

       syntax dubious syntactic constructs (default)

       unsupported
	      unsupported or incomplete features (default)

       all    all the warnings

       no-CATEGORY
	      turn off warnings in CATEGORY

       none   turn off all the warnings

       error  treat warnings as errors

   Files automatically distributed if found (always):
       ABOUT-GNU
	      INSTALL		  config.rpath	      ltconfig

       ABOUT-NLS
	      NEWS		  config.sub	      ltmain.sh

       AUTHORS
	      README		  depcomp	      mdate-sh

       BACKLOG
	      THANKS		  install-sh	      missing

       COPYING
	      TODO		  libversion.in       mkinstalldirs

       COPYING.DOC
	      ar-lib		  ltcf-c.sh	      py-compile

       COPYING.LESSER
	      compile		  ltcf-cxx.sh	      texinfo.tex

       COPYING.LIB
	      config.guess	  ltcf-gcj.sh	      ylwrap

	      ChangeLog

   Files automatically distributed if found (under certain conditions):
       acconfig.h
	      config.h.bot	  configure	      configure.in

       aclocal.m4
	      config.h.top	  configure.ac	      stamp-vti

AUTHOR

       Written by Tom Tromey <tromey@redhat.com>

	      and Alexandre Duret-Lutz <adl@gnu.org>.

REPORTING BUGS

       Report bugs to <bug-automake@gnu.org>.
       GNU Automake home page: <http://www.gnu.org/software/automake/>.
       General help using GNU software: <http://www.gnu.org/gethelp/>.

COPYRIGHT

       Copyright (C) 2017 Free Software Foundation, Inc.  License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl-2.0.html>
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       The  full  documentation  for automake is maintained as a Texinfo manual.  If the info and automake programs are properly installed at your
       site, the command

	      info automake

       should give you access to the complete manual.

automake 1.15.1 						    March 2018							       AUTOMAKE(1)
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