1#serial 2
2dnl Copyright (C) 2007-2023 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved.
6
7dnl From Jim Meyering.
8
9# Usage: gl_ADD_PROG([prog_list_var_name], [prog_name])
10AC_DEFUN([gl_ADD_PROG],
11[{
12  if test -z "$$1"; then
13    $1=$2
14  else
15    $1="$$1 $2"
16  fi
17}])
18
19# Usage: gl_REMOVE_PROG([prog_list_var_name], [prog_name])
20AC_DEFUN([gl_REMOVE_PROG],
21[{
22  $1=`for gl_rem_i in $$1; do
23        test "$gl_rem_i" = "$2" || echo "$gl_rem_i"
24      done | tr '\012' ' ' | sed 's/ $//'; echo`
25}])
26
27# Given the name of a variable containing a space-separated list of
28# install-by-default programs and the list of do-not-install-by-default
29# programs, modify the former variable to reflect "no-install" and
30# "do-install" requests.  The names in the latter list should be comma-
31# separated.
32#
33# Usage: gl_INCLUDE_EXCLUDE_PROG([prog_list_var_name], [no_inst_prog_list])
34AC_DEFUN([gl_INCLUDE_EXCLUDE_PROG],
35[{
36  gl_no_install_progs_default=`echo '$2'|sed 's/,/ /g'`
37  AC_ARG_ENABLE([install-program],
38    [AS_HELP_STRING([--enable-install-program=PROG_LIST],
39                    [install the programs in PROG_LIST (comma-separated,
40                    default: none)])],
41    [gl_do_install_prog=$enableval],
42    [gl_do_install_prog=]
43  )
44
45  # If you want to refrain from installing programs A and B,
46  # use --enable-no-install-program=A,B
47  AC_ARG_ENABLE([no-install-program],
48    [AS_HELP_STRING([--enable-no-install-program=PROG_LIST],
49                    [do NOT install the programs in PROG_LIST
50                    (comma-separated, default: $2)])],
51    [gl_no_install_prog=$enableval],
52    [gl_no_install_prog=]
53  )
54
55  # Convert to space separated lists.
56  gl_do_install_prog=`echo "$gl_do_install_prog"|tr -s , ' '`
57  gl_no_install_prog=`echo "$gl_no_install_prog"|tr -s , ' '`
58
59  # For each not-to-be-installed program name, ensure that it's a
60  # valid name, remove it from the list of programs to build/install,
61  # as well as from the list of man pages to install.
62  for gl_i in $gl_no_install_prog; do
63
64    # Fail upon a request to install and not-install the same program.
65    case " $gl_do_install_prog " in
66      *" $gl_i "*) AC_MSG_ERROR(['$gl_i' is both included and excluded]) ;;
67    esac
68
69    gl_msg=
70    # Warn about a request not to install a program that is not being
71    # built (which may be because the systems lacks a required interface).
72    case " $$1 " in
73      *" $gl_i "*) gl_REMOVE_PROG([$1], $gl_i) ;;
74      *) gl_msg="'$gl_i' is already not being installed" ;;
75    esac
76
77    if test "$gl_msg" = ''; then
78      # Warn about a request not to install a program that is
79      # already on the default-no-install list.
80      case " $gl_no_install_progs_default " in
81        *" $gl_i "*) gl_msg="by default, '$gl_i' is not installed" ;;
82      esac
83    fi
84
85    test "$gl_msg" != '' && AC_MSG_WARN([$gl_msg])
86  done
87
88  for gl_i in $gl_do_install_prog; do
89    case " $gl_no_install_progs_default " in
90      *" $gl_i "*) gl_ADD_PROG([$1], $gl_i) ;;
91      *) AC_MSG_WARN(['$gl_i' is not an optionally-installable program]) ;;
92    esac
93  done
94}])
95