Fix krb5 library detection

This resolves FTBFS with heimdal-krb5

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>

configure.in.in

@@ -13,3 +13,40 @@ lt_age="0"
 AC_SUBST(lt_current)
 AC_SUBST(lt_revision)
 AC_SUBST(lt_age)
+
+PKG_CHECK_MODULES(KRB5, krb5, have_krb5=yes, have_krb5=no)
+if test "x$have_krb5" = "xno"; then
+  # Try to find krb5 without pkg-config file (required for older distros)
+  AC_MSG_CHECKING(krb5)
+  AC_FIND_FILE(krb5.h, [\
+    /usr/local/include/heimdal /usr/local/include \
+    /usr/include/heimdal /usr/include \
+    ], krb5_includes)
+  if test "x$krb5_includes" != "xNO"; then
+    krb5_multiarch="`gcc -print-multiarch 2>/dev/null`"
+    AC_FIND_FILE(libkrb5.so, [\
+        /usr/local/lib/$krb5_multiarch/heimdal /usr/local/lib64/heimdal /usr/local/lib/heimdal \
+        /usr/local/lib/$krb5_multiarch /usr/local/lib64 /usr/local/lib \
+        /usr/lib/$krb5_multiarch/heimdal /usr/lib64/heimdal /usr/lib/heimdal \
+        /usr/lib/$krb5_multiarch /usr/lib64 /usr/lib \
+        ], krb5_libs)
+    if test "x$krb5_libs" != "xNO"; then
+      AC_MSG_RESULT([libraries $krb5_libs, headers $krb5_includes])
+      CPPFLAGS="$CPPFLAGS -I$krb5_includes"
+      CFLAGS="$CFLAGS -I$krb5_includes"
+      LDFLAGS="$LDFLAGS -L$krb5_libs"
+      AC_CHECK_HEADER(krb5.h, have_krb5=yes)
+    fi
+  fi
+  if test "x$have_krb5" != "xno"; then
+    KRB5_CFLAGS="-I$krb5_includes"
+    KRB5_LIBS="-L$krb5_libs -lkrb5"
+    AC_SUBST(KRB5_CFLAGS)
+    AC_SUBST(KRB5_LIBS)
+  else
+    AC_MSG_RESULT(no)
+  fi
+fi
+if test "x$have_krb5" = "xno"; then
+  AC_MSG_ERROR([krb5 library is needed but not found on our system])
+fi

src/Makefile.am

@@ -1,6 +1,6 @@
 KDE_CXXFLAGS = $(ENABLE_PERMISSIVE_FLAG)
 
-INCLUDES    = $(all_includes)
+INCLUDES    = $(all_includes) $(KRB5_CFLAGS)
 METASOURCES = AUTO
 
 # Create a shared library file
@@ -11,5 +11,5 @@ include_HEADERS = libtdeldap.h ldappasswddlg.h
 libtdeldap_la_SOURCES = libtdeldap.cpp ldaplogindlgbase.ui ldaplogindlg.cpp ldappasswddlg.cpp
 libtdeldap_la_LIBADD = -ltdeio $(LIB_TDEUI) -lldap $(LIB_QT) $(LIB_TDECORE) -ltdesu -llber -lkadm5clnt -lkadm5srv
 libtdeldap_la_LDFLAGS = -version-info $(lt_current):$(lt_revision):$(lt_age) -no-undefined \
-	$(all_libraries)
+	$(all_libraries) $(KRB5_LIBS)