From: Hans Petter Jansson <hpj@copyleft.no>
      Wolfgang Rosenauer <wr@rosenauer.org>
Subject: use libnsssharedhelper if available at compile time
         (can be disabled by exporting MOZ_XRE_NO_NSSHELPER=1)
References:


diff --git a/config/autoconf.mk.in b/config/autoconf.mk.in
--- a/config/autoconf.mk.in
+++ b/config/autoconf.mk.in
@@ -535,6 +535,10 @@ LIBIDL_LIBS = @LIBIDL_LIBS@
 LIBIDL_LIBS = @LIBIDL_LIBS@
 STATIC_LIBIDL = @STATIC_LIBIDL@
 
+MOZ_ENABLE_NSSHELPER = @MOZ_ENABLE_NSSHELPER@
+NSSHELPER_CFLAGS = @NSSHELPER_CFLAGS@
+NSSHELPER_LIBS = @NSSHELPER_LIBS@
+
 MOZ_NATIVE_MAKEDEPEND	= @SYSTEM_MAKEDEPEND@
 
 # Used for LD_LIBRARY_PATH
diff --git a/configure.in b/configure.in
--- a/configure.in
+++ b/configure.in
@@ -7613,6 +7613,21 @@ dnl ====================================
 
 QCMS_LIBS='$(DEPTH)/gfx/qcms/$(LIB_PREFIX)mozqcms.$(LIB_SUFFIX)'
 AC_SUBST(QCMS_LIBS)
+
+dnl ========================================================
+dnl Check for nss-shared-helper
+dnl ========================================================
+
+  PKG_CHECK_MODULES(NSSHELPER, nss-shared-helper, 
+   [MOZ_ENABLE_NSSHELPER=1],
+   [MOZ_ENABLE_NSSHELPER=])
+
+if test "$MOZ_ENABLE_NSSHELPER"; then
+  AC_DEFINE(MOZ_ENABLE_NSSHELPER)
+fi
+AC_SUBST(MOZ_ENABLE_NSSHELPER)
+AC_SUBST(NSSHELPER_CFLAGS)
+AC_SUBST(NSSHELPER_LIBS)
 
 dnl ========================================================
 dnl disable xul
diff --git a/security/manager/ssl/src/Makefile.in b/security/manager/ssl/src/Makefile.in
--- a/security/manager/ssl/src/Makefile.in
+++ b/security/manager/ssl/src/Makefile.in
@@ -137,12 +137,13 @@ DEFINES += -DNSS_ENABLE_ECC
 
 # Use local includes because they are inserted before INCLUDES
 # so that Mozilla's nss.h is used, not glibc's
-LOCAL_INCLUDES += $(NSS_CFLAGS)
+LOCAL_INCLUDES += $(NSS_CFLAGS) $(NSSHELPER_CFLAGS)
 
 EXTRA_DSO_LDOPTS += \
 		$(MOZ_UNICHARUTIL_LIBS) \
 		$(MOZ_COMPONENT_LIBS) \
 		$(MOZ_JS_LIBS) \
+		$(NSSHELPER_LIBS) \
 		$(NSS_LIBS) \
 		$(NULL)
 
diff --git a/security/manager/ssl/src/nsNSSComponent.cpp b/security/manager/ssl/src/nsNSSComponent.cpp
--- a/security/manager/ssl/src/nsNSSComponent.cpp
+++ b/security/manager/ssl/src/nsNSSComponent.cpp
@@ -43,6 +43,13 @@
  * the terms of any one of the MPL, the GPL or the LGPL.
  *
  * ***** END LICENSE BLOCK ***** */
+
+#ifdef MOZ_ENABLE_NSSHELPER
+#pragma GCC visibility push(default)
+#include <nss-shared-helper.h>
+#pragma GCC visibility pop
+#include "prenv.h"
+#endif
 
 #include "nsNSSComponent.h"
 #include "nsNSSCallbacks.h"
@@ -1602,7 +1609,21 @@ nsNSSComponent::InitializeNSS(PRBool sho
 
     ConfigureInternalPKCS11Token();
 
-    SECStatus init_rv = ::NSS_InitReadWrite(profileStr.get());
+    SECStatus init_rv = SECFailure;
+#ifdef MOZ_ENABLE_NSSHELPER
+    if (PR_GetEnv("MOZ_TB_NO_NSSHELPER")) {
+      init_rv = ::NSS_InitReadWrite(profileStr.get());
+    } else {
+      init_rv = ::nsshelp_open_db ("Thunderbird", profileStr.get(), 0);
+
+      if (init_rv != SECSuccess) {
+        PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("can not init NSS using nsshelp_open_db in %s\n", profileStr.get()));
+        init_rv = ::NSS_InitReadWrite(profileStr.get());
+      }
+    }
+#else
+    init_rv = ::NSS_InitReadWrite(profileStr.get());
+#endif
 
     if (init_rv != SECSuccess) {
       PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("can not init NSS r/w in %s\n", profileStr.get()));
diff --git a/toolkit/library/Makefile.in b/toolkit/library/Makefile.in
--- a/toolkit/library/Makefile.in
+++ b/toolkit/library/Makefile.in
@@ -194,7 +194,7 @@ endif
 
 DEFINES += -DIMPL_XREAPI
 
-EXTRA_DSO_LDOPTS += $(NSPR_LIBS)
+EXTRA_DSO_LDOPTS += $(NSPR_LIBS) $(NSSHELPER_LIBS)
 
 ifeq ($(MOZ_WIDGET_TOOLKIT),cocoa)
 CXXFLAGS	+= $(TK_CFLAGS)