README
1 THIS TARBALL IS NOT A FULL DISTRIBUTION.
2
3The contents of this tarball is designed to be incorporated into
4software packages that utilize the AutoOpts option automation package
5and are intended to be installed on systems that may not have libopts
6installed. It is redistributable under the terms of either the LGPL
7(see COPYING.lgpl) or under the terms of the advertising clause free BSD
8license (see COPYING.mbsd).
9
10Usage Instructions for autoconf/automake/libtoolized projects:
11
121. Install the unrolled tarball into your package source tree,
13 copying ``libopts.m4'' to your autoconf macro directory.
14
15 In your bootstrap (pre-configure) script, you can do this:
16
17 rm -rf libopts libopts-*
18 gunzip -c `autoopts-config libsrc` | tar -xvf -
19 mv -f libopts-*.*.* libopts
20 cp -fp libopts/m4/*.m4 m4/.
21
22 I tend to put my configure auxiliary files in "m4".
23 Whatever directory you choose, if it is not ".", then
24 be sure to tell autoconf about it with:
25
26 AC_CONFIG_AUX_DIR(m4)
27
28 This is one macro where you *MUST* remember to *NOT* quote
29 the argument. If you do, automake will get lost.
30
312. Add an invocation of either LIBOPTS_CHECK or LIBOPTS_CHECK_NOBUILD
32 to your configure.ac file. See LIBOPTS_CHECK: below for details.
33
343. Add the following to your top level ``Makefile.am'' file:
35
36 if NEED_LIBOPTS
37 SUBDIRS += $(LIBOPTS_DIR)
38 endif
39
40 where ``<...>'' can be whatever other files or directories you may
41 need. The SUBDIRS must be properly ordered. *PLEASE NOTE* it is
42 crucial that the SUBDIRS be set under the control of an automake
43 conditional. To work correctly, automake has to know the range of
44 possible values of SUBDIRS. It's a magical name with magical
45 properties. ``NEED_LIBOPTS'' will be correctly set by the
46 ``LIBOPTS_CHECK'' macro, above.
47
484. Add ``$(LIBOPTS_CFLAGS)'' to relevant compiler flags and
49 ``$(LIBOPTS_LDADD)'' to relevant link options whereever
50 you need them in your build tree.
51
525. Make sure your object files explicitly depend upon the
53 generated options header file. e.g.:
54
55 $(prog_OBJECTS) : prog-opts.h
56 prog-opts.h : prog-opts.c
57 prog-opts.c : prog-opts.def
58 autogen prog-opts.def
59
606. *OPTIONAL* --
61 If you are creating man pages and texi documentation from
62 the program options, you will need these rules somewhere, too:
63
64 man_MANS = prog.1
65 prog.1 : prog-opts.def
66 autogen -Tagman-cmd.tpl -bprog prog-opts.def
67
68 invoke-prog.texi : prog-opts.def
69 autogen -Tagtexi-cmd.tpl prog-opts.def
70
71If your package does not utilize the auto* tools, then you
72will need to hand craft the rules for building the library.
73
74LIBOPTS_CHECK:
75
76The arguments to both macro are a relative path to the directory with
77the libopts source code. It is optional and defaults to "libopts".
78These macros work as follows:
79
801. LIBOPTS_CHECK([libopts/rel/path/optional])
81
82 Adds two command-line options to the generated configure script,
83 --enable-local-libopts and --disable-libopts-install. AC_SUBST's
84 LIBOPTS_CFLAGS, LIBOPTS_LDADD, and LIBOPTS_DIR for use in
85 Makefile.am files. Adds Automake conditional NEED_LIBOPTS which
86 will be true when the local copy of libopts should be built. Uses
87 AC_CONFIG_FILES([$libopts-dir/Makefile]) to cause the local libopts
88 into the package build. If the optional relative path to libopts is
89 not provided, it defaults to simply "libopts".
90
912. LIBOPTS_CHECK_NOBUILD([libopts/rel/path/optional])
92
93 This variant of LIBOPTS_CHECK is useful when multiple configure.ac
94 files in a package make use of a single libopts tearoff. In that
95 case, only one of the configure.ac files should build libopts and
96 others should simply use it. Consider this package arrangment:
97
98 all-tools/
99 configure.ac
100 common-tools/
101 configure.ac
102 libopts/
103
104 The parent package all-tools contains a subpackage common-tools
105 which can be torn off and used independently. Programs configured
106 by both configure.ac files link against the common-tools/libopts
107 tearoff, when not using the system's libopts. The top-level
108 configure.ac uses LIBOPTS_CHECK_NOBUILD([common-tools/libopts]),
109 while common-tools/configure.ac uses LIBOPTS_CHECK. The difference
110 is LIBOPTS_CHECK_NOBUILD will never build the libopts tearoff,
111 leaving that to the subpackage configure.ac's LIBOPTS_CHECK.
112 Specifically, LIBOPTS_CHECK_NOBUILD always results in the
113 NEED_LIBOPTS Automake conditional being false, and does not invoke
114 AC_CONFIG_FILES(path-to-libopts/Makefile).
115
116LICENSING:
117
118This material is Copyright (C) 1992-2015 by Bruce Korb. You are
119licensed to use this under the terms of either the GNU Lesser General
120Public License (see: COPYING.lgpl), or, at your option, the modified
121Berkeley Software Distribution License (see: COPYING.mbsd). Both of
122these files should be included with this tarball.
123