diff --git a/configure.ac b/configure.ac
index 44e901a5..6a3a2420 100644
--- a/configure.ac
+++ b/configure.ac
@@ -63,10 +63,45 @@ LIBZMQ_CHECK_ENABLE_DEBUG
 # Check wheter to enable code coverage
 LIBZMQ_WITH_GCOV
 
-# Checks for libraries
-AC_CHECK_LIB([pthread], [pthread_create])
-AC_CHECK_LIB([rt], [clock_gettime])
-AC_CHECK_LIB([sodium], [sodium_init],,AC_MSG_WARN(libsodium is needed for CURVE security))
+# Allow libsodium to be installed in a custom path:
+
+AC_ARG_WITH([libsodium],
+            [AS_HELP_STRING([--with-libsodium],
+                            [Specify libsodium prefix])],
+            [zmq_search_libsodium="yes"],
+            [])
+
+if test "x$zmq_search_libsodium" = "xyes"; then
+    if test -r "${with_libsodium}/include/sodium.h"; then
+        CXXFLAGS="-I${with_libsodium}/include ${CXXFLAGS}"
+        LDFLAGS="-L${with_libsodium}/lib ${LDFLAGS}"
+    fi
+fi
+
+AC_ARG_WITH([libsodium-include-dir],
+            [AS_HELP_STRING([--with-libsodium-include-dir],
+                            [Specify libsodium include prefix])],
+            [zmq_search_libsodium_include="yes"],
+            [])
+
+if test "x$zmq_search_libsodium_include" = "xyes"; then
+    if test -r "${with_libsodium_include_dir}/sodium.h"; then
+        CXXFLAGS="-I${with_libsodium_include_dir}/include ${CXXFLAGS}"
+    fi
+fi
+
+AC_ARG_WITH([libsodium_lib_dir],
+            [AS_HELP_STRING([--with-libsodium-lib-dir],
+                            [Specify libsodium library prefix])],
+            [zmq_search_libsodium_lib="yes"],
+            [])
+
+if test "x$zmq_search_libsodium_lib" = "xyes"; then
+    if test -r "${with_libsodium_lib_dir}/libsodium.{a|so|dylib}"; then
+        LDFLAGS="-L${with_libsodium}/lib ${LDFLAGS}"
+    fi
+fi
+>>>>>>> aa84e85... Add '-lssp' linker flag for Solaris. Check for libraries after host specific setup.
 
 # Set pedantic
 libzmq_pedantic="yes"
@@ -122,6 +157,8 @@ case "${host_os}" in
         if test "x$solaris_has_atomic" = "xno"; then
             AC_DEFINE(ZMQ_FORCE_MUTEXES, 1, [Force to use mutexes])
         fi
+        # ssp library is required for libsodium on Solaris-like systems
+        LDFLAGS="-lssp $LDFLAGS"
         ;;
     *freebsd*)
         # Define on FreeBSD to enable all library features
@@ -215,6 +252,11 @@ case "${host_os}" in
         ;;
 esac
 
+# Checks for libraries
+AC_CHECK_LIB([pthread], [pthread_create])
+AC_CHECK_LIB([rt], [clock_gettime])
+AC_CHECK_LIB([sodium], [sodium_init],,AC_MSG_WARN(libsodium is needed for CURVE security))
+
 #
 # Check if the compiler supports -fvisibility=hidden flag. MinGW32 uses __declspec
 #