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.
8 dnl Provides the macro RRA_LIB_GSSAPI and sets the substitution variables
9 dnl GSSAPI_CPPFLAGS, GSSAPI_LDFLAGS, and GSSAPI_LIBS. Also provides
10 dnl RRA_LIB_GSSAPI_SWITCH to set CPPFLAGS, LDFLAGS, and LIBS to include the
11 dnl GSS-API libraries, saving the ecurrent values, and RRA_LIB_GSSAPI_RESTORE
12 dnl to restore those settings to before the last RRA_LIB_GSSAPI_SWITCH.
14 dnl Depends on RRA_ENABLE_REDUCED_DEPENDS and RRA_SET_LDFLAGS.
16 dnl Written by Russ Allbery <rra@stanford.edu>
17 dnl Copyright 2005, 2006, 2007, 2008, 2009, 2011
18 dnl The Board of Trustees of the Leland Stanford Junior University
20 dnl This file is free software; the authors give unlimited permission to copy
21 dnl and/or distribute it, with or without modifications, as long as this
22 dnl notice is preserved.
24 dnl Save the current CPPFLAGS, LDFLAGS, and LIBS settings and switch to
25 dnl versions that include the GSS-API flags. Used as a wrapper, with
26 dnl RRA_LIB_GSSAPI_RESTORE, around tests.
27 AC_DEFUN([RRA_LIB_GSSAPI_SWITCH],
28 [rra_gssapi_save_CPPFLAGS="$CPPFLAGS"
29 rra_gssapi_save_LDFLAGS="$LDFLAGS"
30 rra_gssapi_save_LIBS="$LIBS"
31 CPPFLAGS="$GSSAPI_CPPFLAGS $CPPFLAGS"
32 LDFLAGS="$GSSAPI_LDFLAGS $LDFLAGS"
33 LIBS="$GSSAPI_LIBS $LIBS"])
35 dnl Restore CPPFLAGS, LDFLAGS, and LIBS to their previous values (before
36 dnl RRA_LIB_GSSAPI_SWITCH was called).
37 AC_DEFUN([RRA_LIB_GSSAPI_RESTORE],
38 [CPPFLAGS="$rra_gssapi_save_CPPFLAGS"
39 LDFLAGS="$rra_gssapi_save_LDFLAGS"
40 LIBS="$rra_gssapi_save_LIBS"])
42 dnl Set GSSAPI_CPPFLAGS and GSSAPI_LDFLAGS based on rra_gssapi_root,
43 dnl rra_gssapi_libdir, and rra_gssapi_includedir.
44 AC_DEFUN([_RRA_LIB_GSSAPI_PATHS],
45 [AS_IF([test x"$rra_gssapi_libdir" != x],
46 [GSSAPI_LDFLAGS="-L$rra_gssapi_libdir"],
47 [AS_IF([test x"$rra_gssapi_root" != x],
48 [RRA_SET_LDFLAGS([GSSAPI_LDFLAGS], [$rra_gssapi_root])])])
49 AS_IF([test x"$rra_gssapi_includedir" != x],
50 [GSSAPI_CPPFLAGS="-I$rra_gssapi_includedir"],
51 [AS_IF([test x"$rra_gssapi_root" != x],
52 [AS_IF([test x"$rra_gssapi_root" != x/usr],
53 [GSSAPI_CPPFLAGS="-I${rra_gssapi_root}/include"])])])])
55 dnl Does the appropriate library checks for reduced-dependency GSS-API
57 AC_DEFUN([_RRA_LIB_GSSAPI_REDUCED],
58 [RRA_LIB_GSSAPI_SWITCH
59 AC_CHECK_LIB([gssapi_krb5], [gss_import_name], [GSSAPI_LIBS="-lgssapi_krb5"],
60 [AC_CHECK_LIB([gssapi], [gss_import_name], [GSSAPI_LIBS="-lgssapi"],
61 [AC_CHECK_LIB([gss], [gss_import_name], [GSSAPI_LIBS="-lgss"],
62 [AC_MSG_ERROR([cannot find usable GSS-API library])])])])
63 RRA_LIB_GSSAPI_RESTORE])
65 dnl Does the appropriate library checks for GSS-API linkage when we don't
66 dnl have krb5-config or reduced dependencies. libgss is used as a last
67 dnl resort, since it may be a non-functional mech-independent wrapper, but
68 dnl it's the right choice on Solaris 10.
69 AC_DEFUN([_RRA_LIB_GSSAPI_MANUAL],
70 [RRA_LIB_GSSAPI_SWITCH
73 AC_SEARCH_LIBS([res_search], [resolv], [],
74 [AC_SEARCH_LIBS([__res_search], [resolv])])
75 AC_SEARCH_LIBS([gethostbyname], [nsl])
76 AC_SEARCH_LIBS([socket], [socket], [],
77 [AC_CHECK_LIB([nsl], [socket], [LIBS="-lnsl -lsocket $LIBS"], [],
79 AC_SEARCH_LIBS([crypt], [crypt])
80 AC_SEARCH_LIBS([rk_simple_execve], [roken])
81 rra_gssapi_extra="$LIBS"
82 LIBS="$rra_gssapi_save_LIBS"
83 AC_CHECK_LIB([gssapi], [gss_import_name],
84 [GSSAPI_LIBS="-lgssapi -lkrb5 -lasn1 -lcrypto -lcom_err $rra_gssapi_extra"],
85 [AC_CHECK_LIB([krb5support], [krb5int_getspecific],
86 [rra_gssapi_extra="-lkrb5support $rra_gssapi_extra"],
87 [AC_CHECK_LIB([pthreads], [pthread_setspecific],
88 [rra_gssapi_pthread="-lpthreads"],
89 [AC_CHECK_LIB([pthread], [pthread_setspecific],
90 [rra_gssapi_pthread="-lpthread"])])
91 AC_CHECK_LIB([krb5support], [krb5int_setspecific],
92 [rra_gssapi_extra="-lkrb5support $rra_gssapi_extra"
93 rra_gssapi_extra="$rra_gssapi_extra $rra_gssapi_pthread"], [],
94 [$rra_gssapi_pthread])])
95 AC_CHECK_LIB([com_err], [error_message],
96 [rra_gssapi_extra="-lcom_err $rra_gssapi_extra"])
97 AC_CHECK_LIB([k5crypto], [krb5int_hash_md5],
98 [rra_gssapi_extra="-lk5crypto $rra_gssapi_extra"])
99 rra_gssapi_extra="-lkrb5 $rra_gssapi_extra"
100 AC_CHECK_LIB([gssapi_krb5], [gss_import_name],
101 [GSSAPI_LIBS="-lgssapi_krb5 $rra_gssapi_extra"],
102 [AC_CHECK_LIB([gss], [gss_import_name],
103 [GSSAPI_LIBS="-lgss"],
104 [AC_MSG_ERROR([cannot find usable GSS-API library])])],
105 [$rra_gssapi_extra])],
106 [-lkrb5 -lasn1 -lcrypto -lcom_err $rra_gssapi_extra])
107 RRA_LIB_GSSAPI_RESTORE])
109 dnl Sanity-check the results of krb5-config and be sure we can really link a
110 dnl GSS-API program. If not, fall back on the manual check.
111 AC_DEFUN([_RRA_LIB_GSSAPI_CHECK],
112 [RRA_LIB_GSSAPI_SWITCH
113 AC_CHECK_FUNC([gss_import_name],
114 [RRA_LIB_GSSAPI_RESTORE],
115 [RRA_LIB_GSSAPI_RESTORE
118 _RRA_LIB_GSSAPI_PATHS
119 _RRA_LIB_GSSAPI_MANUAL])])
122 AC_DEFUN([RRA_LIB_GSSAPI],
123 [AC_REQUIRE([RRA_ENABLE_REDUCED_DEPENDS])
126 rra_gssapi_includedir=
130 AC_SUBST([GSSAPI_CPPFLAGS])
131 AC_SUBST([GSSAPI_LDFLAGS])
132 AC_SUBST([GSSAPI_LIBS])
134 AC_ARG_WITH([gssapi],
135 [AS_HELP_STRING([--with-gssapi=DIR],
136 [Location of GSS-API headers and libraries])],
137 [AS_IF([test x"$withval" != xyes && test x"$withval" != xno],
138 [rra_gssapi_root="$withval"])])
139 AC_ARG_WITH([gssapi-include],
140 [AS_HELP_STRING([--with-gssapi-include=DIR],
141 [Location of GSS-API headers])],
142 [AS_IF([test x"$withval" != xyes && test x"$withval" != xno],
143 [rra_gssapi_includedir="$withval"])])
144 AC_ARG_WITH([gssapi-lib],
145 [AS_HELP_STRING([--with-gssapi-lib=DIR],
146 [Location of GSS-API libraries])],
147 [AS_IF([test x"$withval" != xyes && test x"$withval" != xno],
148 [rra_gssapi_libdir="$withval"])])
150 AS_IF([test x"$rra_reduced_depends" = xtrue],
151 [_RRA_LIB_GSSAPI_PATHS
152 _RRA_LIB_GSSAPI_REDUCED],
153 [AC_ARG_VAR([KRB5_CONFIG], [Path to krb5-config])
154 AS_IF([test x"$rra_gssapi_root" != x && test -z "$KRB5_CONFIG"],
155 [AS_IF([test -x "${rra_gssapi_root}/bin/krb5-config"],
156 [KRB5_CONFIG="${rra_gssapi_root}/bin/krb5-config"])],
157 [AC_PATH_PROG([KRB5_CONFIG], [krb5-config], [],
158 [${PATH}:/usr/kerberos/bin])])
159 AS_IF([test x"$KRB5_CONFIG" != x && test -x "$KRB5_CONFIG"],
160 [AC_CACHE_CHECK([for gssapi support in krb5-config],
161 [rra_cv_lib_gssapi_config],
162 [AS_IF(["$KRB5_CONFIG" 2>&1 | grep gssapi >/dev/null 2>&1],
163 [rra_cv_lib_gssapi_config=yes],
164 [rra_cv_lib_gssapi_config=no])])
165 AS_IF([test "$rra_cv_lib_gssapi_config" = yes],
166 [GSSAPI_CPPFLAGS=`"$KRB5_CONFIG" --cflags gssapi 2>/dev/null`
167 GSSAPI_LIBS=`"$KRB5_CONFIG" --libs gssapi 2>/dev/null`],
168 [GSSAPI_CPPFLAGS=`"$KRB5_CONFIG" --cflags 2>/dev/null`
169 GSSAPI_LIBS=`"$KRB5_CONFIG" --libs 2>/dev/null`])
170 GSSAPI_CPPFLAGS=`echo "$GSSAPI_CPPFLAGS" \
171 | sed 's%-I/usr/include ?%%'`
172 _RRA_LIB_GSSAPI_CHECK],
173 [_RRA_LIB_GSSAPI_PATHS
174 _RRA_LIB_GSSAPI_MANUAL])])])