1 dnl Find the compiler and linker flags for GSS-API.
3 dnl Finds the compiler and linker flags for linking with GSS-API libraries.
4 dnl Provides the --with-gssapi, --with-gssapi-include, and --with-gssapi-lib
5 dnl configure option to specify a non-standard path to the GSS-API libraries.
6 dnl Uses krb5-config where available unless reduced dependencies is requested
7 dnl or --with-gssapi-include or --with-gssapi-lib are given.
9 dnl Provides the macro RRA_LIB_GSSAPI and sets the substitution variables
10 dnl GSSAPI_CPPFLAGS, GSSAPI_LDFLAGS, and GSSAPI_LIBS. Also provides
11 dnl RRA_LIB_GSSAPI_SWITCH to set CPPFLAGS, LDFLAGS, and LIBS to include the
12 dnl GSS-API libraries, saving the ecurrent values, and RRA_LIB_GSSAPI_RESTORE
13 dnl to restore those settings to before the last RRA_LIB_GSSAPI_SWITCH.
15 dnl Depends on RRA_ENABLE_REDUCED_DEPENDS and RRA_SET_LDFLAGS.
17 dnl The canonical version of this file is maintained in the rra-c-util
18 dnl package, available at <http://www.eyrie.org/~eagle/software/rra-c-util/>.
20 dnl Written by Russ Allbery <rra@stanford.edu>
21 dnl Copyright 2005, 2006, 2007, 2008, 2009, 2011
22 dnl The Board of Trustees of the Leland Stanford Junior University
24 dnl This file is free software; the authors give unlimited permission to copy
25 dnl and/or distribute it, with or without modifications, as long as this
26 dnl notice is preserved.
28 dnl Save the current CPPFLAGS, LDFLAGS, and LIBS settings and switch to
29 dnl versions that include the GSS-API flags. Used as a wrapper, with
30 dnl RRA_LIB_GSSAPI_RESTORE, around tests.
31 AC_DEFUN([RRA_LIB_GSSAPI_SWITCH],
32 [rra_gssapi_save_CPPFLAGS="$CPPFLAGS"
33 rra_gssapi_save_LDFLAGS="$LDFLAGS"
34 rra_gssapi_save_LIBS="$LIBS"
35 CPPFLAGS="$GSSAPI_CPPFLAGS $CPPFLAGS"
36 LDFLAGS="$GSSAPI_LDFLAGS $LDFLAGS"
37 LIBS="$GSSAPI_LIBS $LIBS"])
39 dnl Restore CPPFLAGS, LDFLAGS, and LIBS to their previous values (before
40 dnl RRA_LIB_GSSAPI_SWITCH was called).
41 AC_DEFUN([RRA_LIB_GSSAPI_RESTORE],
42 [CPPFLAGS="$rra_gssapi_save_CPPFLAGS"
43 LDFLAGS="$rra_gssapi_save_LDFLAGS"
44 LIBS="$rra_gssapi_save_LIBS"])
46 dnl Set GSSAPI_CPPFLAGS and GSSAPI_LDFLAGS based on rra_gssapi_root,
47 dnl rra_gssapi_libdir, and rra_gssapi_includedir.
48 AC_DEFUN([_RRA_LIB_GSSAPI_PATHS],
49 [AS_IF([test x"$rra_gssapi_libdir" != x],
50 [GSSAPI_LDFLAGS="-L$rra_gssapi_libdir"],
51 [AS_IF([test x"$rra_gssapi_root" != x],
52 [RRA_SET_LDFLAGS([GSSAPI_LDFLAGS], [$rra_gssapi_root])])])
53 AS_IF([test x"$rra_gssapi_includedir" != x],
54 [GSSAPI_CPPFLAGS="-I$rra_gssapi_includedir"],
55 [AS_IF([test x"$rra_gssapi_root" != x],
56 [AS_IF([test x"$rra_gssapi_root" != x/usr],
57 [GSSAPI_CPPFLAGS="-I${rra_gssapi_root}/include"])])])])
59 dnl Does the appropriate library checks for reduced-dependency GSS-API
61 AC_DEFUN([_RRA_LIB_GSSAPI_REDUCED],
62 [RRA_LIB_GSSAPI_SWITCH
63 AC_CHECK_LIB([gssapi_krb5], [gss_import_name], [GSSAPI_LIBS="-lgssapi_krb5"],
64 [AC_CHECK_LIB([gssapi], [gss_import_name], [GSSAPI_LIBS="-lgssapi"],
65 [AC_CHECK_LIB([gss], [gss_import_name], [GSSAPI_LIBS="-lgss"],
66 [AC_MSG_ERROR([cannot find usable GSS-API library])])])])
67 RRA_LIB_GSSAPI_RESTORE])
69 dnl Does the appropriate library checks for GSS-API linkage when we don't
70 dnl have krb5-config or reduced dependencies. libgss is used as a last
71 dnl resort, since it may be a non-functional mech-independent wrapper, but
72 dnl it's the right choice on Solaris 10.
73 AC_DEFUN([_RRA_LIB_GSSAPI_MANUAL],
74 [RRA_LIB_GSSAPI_SWITCH
77 AC_SEARCH_LIBS([res_search], [resolv], [],
78 [AC_SEARCH_LIBS([__res_search], [resolv])])
79 AC_SEARCH_LIBS([gethostbyname], [nsl])
80 AC_SEARCH_LIBS([socket], [socket], [],
81 [AC_CHECK_LIB([nsl], [socket], [LIBS="-lnsl -lsocket $LIBS"], [],
83 AC_SEARCH_LIBS([crypt], [crypt])
84 AC_SEARCH_LIBS([rk_simple_execve], [roken])
85 rra_gssapi_extra="$LIBS"
86 LIBS="$rra_gssapi_save_LIBS"
87 AC_CHECK_LIB([gssapi], [gss_import_name],
88 [GSSAPI_LIBS="-lgssapi -lkrb5 -lasn1 -lcrypto -lcom_err $rra_gssapi_extra"],
89 [AC_CHECK_LIB([krb5support], [krb5int_getspecific],
90 [rra_gssapi_extra="-lkrb5support $rra_gssapi_extra"],
91 [AC_CHECK_LIB([pthreads], [pthread_setspecific],
92 [rra_gssapi_pthread="-lpthreads"],
93 [AC_CHECK_LIB([pthread], [pthread_setspecific],
94 [rra_gssapi_pthread="-lpthread"])])
95 AC_CHECK_LIB([krb5support], [krb5int_setspecific],
96 [rra_gssapi_extra="-lkrb5support $rra_gssapi_extra"
97 rra_gssapi_extra="$rra_gssapi_extra $rra_gssapi_pthread"], [],
98 [$rra_gssapi_pthread])])
99 AC_CHECK_LIB([com_err], [error_message],
100 [rra_gssapi_extra="-lcom_err $rra_gssapi_extra"])
101 AC_CHECK_LIB([k5crypto], [krb5int_hash_md5],
102 [rra_gssapi_extra="-lk5crypto $rra_gssapi_extra"])
103 rra_gssapi_extra="-lkrb5 $rra_gssapi_extra"
104 AC_CHECK_LIB([gssapi_krb5], [gss_import_name],
105 [GSSAPI_LIBS="-lgssapi_krb5 $rra_gssapi_extra"],
106 [AC_CHECK_LIB([gss], [gss_import_name],
107 [GSSAPI_LIBS="-lgss"],
108 [AC_MSG_ERROR([cannot find usable GSS-API library])])],
109 [$rra_gssapi_extra])],
110 [-lkrb5 -lasn1 -lcrypto -lcom_err $rra_gssapi_extra])
111 RRA_LIB_GSSAPI_RESTORE])
113 dnl Sanity-check the results of krb5-config and be sure we can really link a
114 dnl GSS-API program. If not, fall back on the manual check.
115 AC_DEFUN([_RRA_LIB_GSSAPI_CHECK],
116 [RRA_LIB_GSSAPI_SWITCH
117 AC_CHECK_FUNC([gss_import_name],
118 [RRA_LIB_GSSAPI_RESTORE],
119 [RRA_LIB_GSSAPI_RESTORE
122 _RRA_LIB_GSSAPI_PATHS
123 _RRA_LIB_GSSAPI_MANUAL])])
125 dnl Determine GSS-API compiler and linker flags from krb5-config.
126 AC_DEFUN([_RRA_LIB_GSSAPI_CONFIG],
127 [AC_ARG_VAR([PATH_KRB5_CONFIG], [Path to krb5-config])
128 AS_IF([test x"$rra_gssapi_root" != x && test -z "$PATH_KRB5_CONFIG"],
129 [AS_IF([test -x "${rra_gssapi_root}/bin/krb5-config"],
130 [PATH_KRB5_CONFIG="${rra_gssapi_root}/bin/krb5-config"])],
131 [AC_PATH_PROG([PATH_KRB5_CONFIG], [krb5-config], [],
132 [${PATH}:/usr/kerberos/bin])])
133 AS_IF([test x"$PATH_KRB5_CONFIG" != x && test -x "$PATH_KRB5_CONFIG"],
134 [AC_CACHE_CHECK([for gssapi support in krb5-config],
135 [rra_cv_lib_gssapi_config],
136 [AS_IF(["$PATH_KRB5_CONFIG" 2>&1 | grep gssapi >/dev/null 2>&1],
137 [rra_cv_lib_gssapi_config=yes],
138 [rra_cv_lib_gssapi_config=no])])
139 AS_IF([test "$rra_cv_lib_gssapi_config" = yes],
140 [GSSAPI_CPPFLAGS=`"$PATH_KRB5_CONFIG" --cflags gssapi 2>/dev/null`
141 GSSAPI_LIBS=`"$PATH_KRB5_CONFIG" --libs gssapi 2>/dev/null`],
142 [GSSAPI_CPPFLAGS=`"$PATH_KRB5_CONFIG" --cflags 2>/dev/null`
143 GSSAPI_LIBS=`"$PATH_KRB5_CONFIG" --libs 2>/dev/null`])
144 GSSAPI_CPPFLAGS=`echo "$GSSAPI_CPPFLAGS" | sed 's%-I/usr/include ?%%'`
145 _RRA_LIB_GSSAPI_CHECK],
146 [_RRA_LIB_GSSAPI_PATHS
147 _RRA_LIB_GSSAPI_MANUAL])])
150 AC_DEFUN([RRA_LIB_GSSAPI],
151 [AC_REQUIRE([RRA_ENABLE_REDUCED_DEPENDS])
154 rra_gssapi_includedir=
158 AC_SUBST([GSSAPI_CPPFLAGS])
159 AC_SUBST([GSSAPI_LDFLAGS])
160 AC_SUBST([GSSAPI_LIBS])
162 AC_ARG_WITH([gssapi],
163 [AS_HELP_STRING([--with-gssapi=DIR],
164 [Location of GSS-API headers and libraries])],
165 [AS_IF([test x"$withval" != xyes && test x"$withval" != xno],
166 [rra_gssapi_root="$withval"])])
167 AC_ARG_WITH([gssapi-include],
168 [AS_HELP_STRING([--with-gssapi-include=DIR],
169 [Location of GSS-API headers])],
170 [AS_IF([test x"$withval" != xyes && test x"$withval" != xno],
171 [rra_gssapi_includedir="$withval"])])
172 AC_ARG_WITH([gssapi-lib],
173 [AS_HELP_STRING([--with-gssapi-lib=DIR],
174 [Location of GSS-API libraries])],
175 [AS_IF([test x"$withval" != xyes && test x"$withval" != xno],
176 [rra_gssapi_libdir="$withval"])])
178 AS_IF([test x"$rra_reduced_depends" = xtrue],
179 [_RRA_LIB_GSSAPI_PATHS
180 _RRA_LIB_GSSAPI_REDUCED],
181 [AS_IF([test x"$rra_gssapi_includedir" = x \
182 && test x"$rra_gssapi_libdir" = x],
183 [_RRA_LIB_GSSAPI_CONFIG],
184 [_RRA_LIB_GSSAPI_PATHS
185 _RRA_LIB_GSSAPI_MANUAL])])])