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1# lib-prefix.m4 serial 1 (gettext-0.11)
2dnl Copyright (C) 2001-2002 Free Software Foundation, Inc.
3dnl This file is free software, distributed under the terms of the GNU
4dnl General Public License.  As a special exception to the GNU General
5dnl Public License, this file may be distributed as part of a program
6dnl that contains a configuration script generated by Autoconf, under
7dnl the same distribution terms as the rest of that program.
8
9dnl From Bruno Haible.
10
11dnl AC_LIB_PREFIX adds to the CPPFLAGS and LDFLAGS the flags that are needed
12dnl to access previously installed libraries. The basic assumption is that
13dnl a user will want packages to use other packages he previously installed
14dnl with the same --prefix option.
15dnl This macro is not needed if only AC_LIB_LINKFLAGS is used to locate
16dnl libraries, but is otherwise very convenient.
17AC_DEFUN([AC_LIB_PREFIX],
18[
19  AC_BEFORE([$0], [AC_LIB_LINKFLAGS])
20  AC_REQUIRE([AC_PROG_CC])
21  AC_REQUIRE([AC_CANONICAL_HOST])
22  AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
23  dnl By default, look in $includedir and $libdir.
24  use_additional=yes
25  AC_LIB_WITH_FINAL_PREFIX([
26    eval additional_includedir=\"$includedir\"
27    eval additional_libdir=\"$libdir\"
28  ])
29  AC_ARG_WITH([lib-prefix],
30[  --with-lib-prefix[=DIR] search for libraries in DIR/include and DIR/lib
31  --without-lib-prefix    don't search for libraries in includedir and libdir],
32[
33    if test "X$withval" = "Xno"; then
34      use_additional=no
35    else
36      if test "X$withval" = "X"; then
37        AC_LIB_WITH_FINAL_PREFIX([
38          eval additional_includedir=\"$includedir\"
39          eval additional_libdir=\"$libdir\"
40        ])
41      else
42        additional_includedir="$withval/include"
43        additional_libdir="$withval/lib"
44      fi
45    fi
46])
47  if test $use_additional = yes; then
48    dnl Potentially add $additional_includedir to $CPPFLAGS.
49    dnl But don't add it
50    dnl   1. if it's the standard /usr/include,
51    dnl   2. if it's already present in $CPPFLAGS,
52    dnl   3. if it's /usr/local/include and we are using GCC on Linux,
53    dnl   4. if it doesn't exist as a directory.
54    if test "X$additional_includedir" != "X/usr/include"; then
55      haveit=
56      for x in $CPPFLAGS; do
57        AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
58        if test "X$x" = "X-I$additional_includedir"; then
59          haveit=yes
60          break
61        fi
62      done
63      if test -z "$haveit"; then
64        if test "X$additional_includedir" = "X/usr/local/include"; then
65          if test -n "$GCC"; then
66            case $host_os in
67              linux*) haveit=yes;;
68            esac
69          fi
70        fi
71        if test -z "$haveit"; then
72          if test -d "$additional_includedir"; then
73            dnl Really add $additional_includedir to $CPPFLAGS.
74            CPPFLAGS="${CPPFLAGS}${CPPFLAGS:+ }-I$additional_includedir"
75          fi
76        fi
77      fi
78    fi
79    dnl Potentially add $additional_libdir to $LDFLAGS.
80    dnl But don't add it
81    dnl   1. if it's the standard /usr/lib,
82    dnl   2. if it's already present in $LDFLAGS,
83    dnl   3. if it's /usr/local/lib and we are using GCC on Linux,
84    dnl   4. if it doesn't exist as a directory.
85    if test "X$additional_libdir" != "X/usr/lib"; then
86      haveit=
87      for x in $LDFLAGS; do
88        AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
89        if test "X$x" = "X-L$additional_libdir"; then
90          haveit=yes
91          break
92        fi
93      done
94      if test -z "$haveit"; then
95        if test "X$additional_libdir" = "X/usr/local/lib"; then
96          if test -n "$GCC"; then
97            case $host_os in
98              linux*) haveit=yes;;
99            esac
100          fi
101        fi
102        if test -z "$haveit"; then
103          if test -d "$additional_libdir"; then
104            dnl Really add $additional_libdir to $LDFLAGS.
105            LDFLAGS="${LDFLAGS}${LDFLAGS:+ }-L$additional_libdir"
106          fi
107        fi
108      fi
109    fi
110  fi
111])
112
113dnl AC_LIB_PREPARE_PREFIX creates variables acl_final_prefix,
114dnl acl_final_exec_prefix, containing the values to which $prefix and
115dnl $exec_prefix will expand at the end of the configure script.
116AC_DEFUN([AC_LIB_PREPARE_PREFIX],
117[
118  dnl Unfortunately, prefix and exec_prefix get only finally determined
119  dnl at the end of configure.
120  if test "X$prefix" = "XNONE"; then
121    acl_final_prefix="$ac_default_prefix"
122  else
123    acl_final_prefix="$prefix"
124  fi
125  if test "X$exec_prefix" = "XNONE"; then
126    acl_final_exec_prefix='${prefix}'
127  else
128    acl_final_exec_prefix="$exec_prefix"
129  fi
130  acl_save_prefix="$prefix"
131  prefix="$acl_final_prefix"
132  eval acl_final_exec_prefix=\"$acl_final_exec_prefix\"
133  prefix="$acl_save_prefix"
134])
135
136dnl AC_LIB_WITH_FINAL_PREFIX([statement]) evaluates statement, with the
137dnl variables prefix and exec_prefix bound to the values they will have
138dnl at the end of the configure script.
139AC_DEFUN([AC_LIB_WITH_FINAL_PREFIX],
140[
141  acl_save_prefix="$prefix"
142  prefix="$acl_final_prefix"
143  acl_save_exec_prefix="$exec_prefix"
144  exec_prefix="$acl_final_exec_prefix"
145  $1
146  exec_prefix="$acl_save_exec_prefix"
147  prefix="$acl_save_prefix"
148])
149