boost single thread

boost-single.patch

build with:
  make boost boost_CONFIGURE_OPTS="threading=single"

will fail as context, thread_win32 (and atomic) are always multi-threaded

diff --git a/src/boost.mk b/src/boost.mk
index cc9fdbc..4a8c125 100644
--- a/src/boost.mk
+++ b/src/boost.mk
@@ -11,6 +11,9 @@ $(PKG)_FILE     := boost_$(subst .,_,$($(PKG)_VERSION)).tar.bz2
 $(PKG)_URL      := http://$(SOURCEFORGE_MIRROR)/project/boost/boost/$($(PKG)_VERSION)/$($(PKG)_FILE)
 $(PKG)_DEPS     := gcc bzip2 expat zlib

+$(PKG)_MT_SUFFIX = \
+    $(if $(findstring threading=single,$($(PKG)_CONFIGURE_OPTS)),,-mt)
+
 define $(PKG)_UPDATE
     $(WGET) -q -O- 'http://www.boost.org/users/download/' | \
     $(SED) -n 's,.*/boost/\([0-9][^"/]*\)/".*,\1,p' | \
@@ -58,6 +61,7 @@ define $(PKG)_BUILD
         --includedir='$(PREFIX)/$(TARGET)/include' \
         -sEXPAT_INCLUDE='$(PREFIX)/$(TARGET)/include' \
         -sEXPAT_LIBPATH='$(PREFIX)/$(TARGET)/lib' \
+        $($(PKG)_CONFIGURE_OPTS) \
         install

     $(if $(BUILD_SHARED), \
@@ -70,11 +74,11 @@ define $(PKG)_BUILD
         -W -Wall -Werror -ansi -U__STRICT_ANSI__ -pedantic \
         '$(PWD)/src/$(PKG)-test.cpp' -o '$(PREFIX)/$(TARGET)/bin/test-boost.exe' \
         -DBOOST_THREAD_USE_LIB \
-        -lboost_serialization-mt \
-        -lboost_thread_win32-mt \
-        -lboost_system-mt \
-        -lboost_chrono-mt \
-        -lboost_context-mt
+        -lboost_serialization$($(PKG)_MT_SUFFIX) \
+        -lboost_thread_win32$($(PKG)_MT_SUFFIX) \
+        -lboost_system$($(PKG)_MT_SUFFIX) \
+        -lboost_chrono$($(PKG)_MT_SUFFIX) \
+        -lboost_context$($(PKG)_MT_SUFFIX)

     # test cmake
     mkdir '$(1).test-cmake'