Make IPv6 support buildtime-optional again (defaults to enabled)

bitcoin-qt.pro

@@ -2,7 +2,7 @@ TEMPLATE = app
 TARGET = bitcoin-qt
 VERSION = 0.6.99
 INCLUDEPATH += src src/json src/qt
-DEFINES += QT_GUI BOOST_THREAD_USE_LIB BOOST_SPIRIT_THREADSAFE USE_IPV6
+DEFINES += QT_GUI BOOST_THREAD_USE_LIB BOOST_SPIRIT_THREADSAFE
 CONFIG += no_include_pwd
 
 # for boost 1.37, add -mt to the boost libraries
@@ -71,6 +71,14 @@ contains(FIRST_CLASS_MESSAGING, 1) {
     DEFINES += FIRST_CLASS_MESSAGING
 }
 
+# use: qmake "USE_IPV6=1" (enabled; default)
+#  or: qmake "USE_IPV6=-" (not supported)
+contains(USE_IPV6, -) {
+	message(Building without IPv6 support)
+} else {
+	DEFINES += USE_IPV6
+}
+
 contains(BITCOIN_NEED_QT_PLUGINS, 1) {
     DEFINES += BITCOIN_NEED_QT_PLUGINS
     QTPLUGIN += qcncodecs qjpcodecs qtwcodecs qkrcodecs qtaccessiblewidgets

src/makefile.linux-mingw

@@ -5,6 +5,7 @@
 DEPSDIR:=/usr/i586-mingw32msvc
 
 USE_UPNP:=0
+USE_IPV6:=1
 
 INCLUDEPATHS= \
  -I"$(CURDIR)" \
@@ -28,7 +29,7 @@ LIBS= \
  -l ssl \
  -l crypto
 
-DEFS=-D_MT -DWIN32 -D_WINDOWS -DBOOST_THREAD_USE_LIB -DBOOST_SPIRIT_THREADSAFE -DUSE_IPV6
+DEFS=-D_MT -DWIN32 -D_WINDOWS -DBOOST_THREAD_USE_LIB -DBOOST_SPIRIT_THREADSAFE
 DEBUGFLAGS=-g
 CFLAGS=-O2 -w -Wall -Wextra -Wformat -Wformat-security -Wno-unused-parameter $(DEBUGFLAGS) $(DEFS) $(INCLUDEPATHS)
 
@@ -40,6 +41,10 @@ ifdef USE_UPNP
 	DEFS += -DSTATICLIB -DUSE_UPNP=$(USE_UPNP)
 endif
 
+ifneq (${USE_IPV6}, -)
+	DEFS += -DUSE_IPV6
+endif
+
 LIBS += -l mingwthrd -l kernel32 -l user32 -l gdi32 -l comdlg32 -l winspool -l winmm -l shell32 -l comctl32 -l ole32 -l oleaut32 -l uuid -l rpcrt4 -l advapi32 -l ws2_32 -l mswsock -l shlwapi
 
 # TODO: make the mingw builds smarter about dependencies, like the linux/osx builds are

src/makefile.mingw

@@ -3,6 +3,7 @@
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 USE_UPNP:=0
+USE_IPV6:=1
 
 INCLUDEPATHS= \
  -I"C:\boost-1.49.0-mgw" \
@@ -23,7 +24,7 @@ LIBS= \
  -l ssl \
  -l crypto
 
-DEFS=-DWIN32 -D_WINDOWS -DBOOST_THREAD_USE_LIB -DBOOST_SPIRIT_THREADSAFE -DUSE_IPV6
+DEFS=-DWIN32 -D_WINDOWS -DBOOST_THREAD_USE_LIB -DBOOST_SPIRIT_THREADSAFE
 DEBUGFLAGS=-g
 CFLAGS=-mthreads -O2 -w -Wall -Wextra -Wformat -Wformat-security -Wno-unused-parameter $(DEBUGFLAGS) $(DEFS) $(INCLUDEPATHS)
 
@@ -36,6 +37,10 @@ ifdef USE_UPNP
  DEFS += -DSTATICLIB -DUSE_UPNP=$(USE_UPNP)
 endif
 
+ifneq (${USE_IPV6}, -)
+	DEFS += -DUSE_IPV6
+endif
+
 LIBS += -l kernel32 -l user32 -l gdi32 -l comdlg32 -l winspool -l winmm -l shell32 -l comctl32 -l ole32 -l oleaut32 -l uuid -l rpcrt4 -l advapi32 -l ws2_32 -l mswsock -l shlwapi
 
 # TODO: make the mingw builds smarter about dependencies, like the linux/osx builds are

src/makefile.osx

@@ -20,6 +20,7 @@ LIBPATHS= \
  -L"$(DEPSDIR)/lib/db48"
 
 USE_UPNP:=1
+USE_IPV6:=1
 
 LIBS= -dead_strip
 
@@ -53,7 +54,7 @@ LIBS += \
 TESTDEFS += -DBOOST_TEST_DYN_LINK
 endif
 
-DEFS=-DMAC_OSX -DMSG_NOSIGNAL=0 -DBOOST_SPIRIT_THREADSAFE -DUSE_IPV6
+DEFS=-DMAC_OSX -DMSG_NOSIGNAL=0 -DBOOST_SPIRIT_THREADSAFE
 
 ifdef RELEASE
 # Compile for maximum compatibility and smallest size.
@@ -105,6 +106,10 @@ else
 endif
 endif
 
+ifneq (${USE_IPV6}, -)
+	DEFS += -DUSE_IPV6
+endif
+
 all: bitcoind
 
 # auto-generated dependencies:

src/makefile.unix

@@ -3,10 +3,11 @@
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 USE_UPNP:=0
+USE_IPV6:=1
 
 LINK:=$(CXX)
 
-DEFS=-DUSE_IPV6 -DBOOST_SPIRIT_THREADSAFE
+DEFS=-DBOOST_SPIRIT_THREADSAFE
 
 DEFS += $(addprefix -I,$(CURDIR) $(CURDIR)/obj $(BOOST_INCLUDE_PATH) $(BDB_INCLUDE_PATH) $(OPENSSL_INCLUDE_PATH))
 LIBS = $(addprefix -L,$(BOOST_LIB_PATH) $(BDB_LIB_PATH) $(OPENSSL_LIB_PATH))
@@ -43,6 +44,10 @@ ifneq (${USE_UPNP}, -)
 	DEFS += -DUSE_UPNP=$(USE_UPNP)
 endif
 
+ifneq (${USE_IPV6}, -)
+	DEFS += -DUSE_IPV6
+endif
+
 LIBS+= \
  -Wl,-B$(LMODE2) \
    -l z \