Create the common location for all m4 autotool build scripts, build-aux/m4.

Update .gitignore.

.gitignore

@@ -8,25 +8,32 @@ src/bitcoin-tx
 src/test/test_bitcoin
 src/qt/test/test_bitcoin-qt
 
+# autoreconf
 Makefile.in
 aclocal.m4
 autom4te.cache/
+build-aux/config.guess
+build-aux/config.sub
+build-aux/depcomp
+build-aux/install-sh
+build-aux/ltmain.sh
+build-aux/m4/libtool.m4
+build-aux/m4/lt~obsolete.m4
+build-aux/m4/ltoptions.m4
+build-aux/m4/ltsugar.m4
+build-aux/m4/ltversion.m4
+build-aux/missing
+build-aux/compile
+build-aux/test-driver
 config.log
 config.status
 configure
+libtool
 src/config/bitcoin-config.h
 src/config/bitcoin-config.h.in
 src/config/stamp-h1
-src/build-aux/
 share/setup.nsi
 share/qt/Info.plist
-# Libtool
-libtool
-src/m4/libtool.m4
-src/m4/ltoptions.m4
-src/m4/ltsugar.m4
-src/m4/ltversion.m4
-src/m4/lt~obsolete.m4
 
 src/univalue/gen
 

Makefile.am

@@ -1,4 +1,4 @@
-ACLOCAL_AMFLAGS = -I src/m4
+ACLOCAL_AMFLAGS = -I build-aux/m4
 SUBDIRS = src
 .PHONY: deploy FORCE
 

configure.ac

@@ -7,8 +7,8 @@ define(_CLIENT_VERSION_BUILD, 0)
 define(_CLIENT_VERSION_IS_RELEASE, false)
 define(_COPYRIGHT_YEAR, 2014)
 AC_INIT([Bitcoin Core],[_CLIENT_VERSION_MAJOR._CLIENT_VERSION_MINOR._CLIENT_VERSION_REVISION],[info@bitcoin.org],[bitcoin])
-AC_CONFIG_AUX_DIR([src/build-aux])
-AC_CONFIG_MACRO_DIR([src/m4])
+AC_CONFIG_AUX_DIR([build-aux])
+AC_CONFIG_MACRO_DIR([build-aux/m4])
 LT_INIT([disable-shared])
 AC_CANONICAL_HOST
 AH_TOP([#ifndef BITCOIN_CONFIG_H])
@@ -44,6 +44,30 @@ AM_MAINTAINER_MODE([enable])
 dnl make the compilation flags quiet unless V=1 is used
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
 
+dnl Checks for programs.
+AC_PROG_CXX
+AC_PROG_CC
+AC_PROG_CPP
+AC_PROG_CXXCPP
+AC_PROG_INSTALL
+AC_PROG_OBJC
+AC_PROG_LN_S
+m4_ifdef([AC_PROG_OBJCXX],[AC_PROG_OBJCXX])
+AC_PROG_MKDIR_P
+AC_PROG_SED
+AC_PATH_TOOL(AR, ar)
+AC_PATH_TOOL(RANLIB, ranlib)
+AC_PATH_TOOL(STRIP, strip)
+AC_PATH_TOOL(GCOV, gcov)
+AC_PATH_PROG(LCOV, lcov)
+AC_PATH_PROG(JAVA, java)
+AC_PATH_PROG(GENHTML, genhtml)
+AC_PATH_PROG([GIT], [git])
+AC_PATH_PROG(CCACHE,ccache)
+AC_PATH_PROG(XGETTEXT,xgettext)
+AC_PATH_PROG(HEXDUMP,hexdump)
+PKG_PROG_PKG_CONFIG
+
 # Enable wallet
 AC_ARG_ENABLE([wallet],
   [AS_HELP_STRING([--enable-wallet],
@@ -120,30 +144,6 @@ AC_ARG_WITH([protoc-bindir],[AS_HELP_STRING([--with-protoc-bindir=BIN_DIR],[spec
 AC_CONFIG_SRCDIR([src])
 AC_CONFIG_HEADERS([src/config/bitcoin-config.h])
 
-dnl Checks for programs.
-AC_PROG_CXX
-AC_PROG_CC
-AC_PROG_CPP
-AC_PROG_CXXCPP
-AC_PROG_INSTALL
-AC_PROG_OBJC
-AC_PROG_LN_S
-m4_ifdef([AC_PROG_OBJCXX],[AC_PROG_OBJCXX])
-AC_PROG_MKDIR_P
-AC_PROG_SED
-AC_PATH_TOOL(AR, ar)
-AC_PATH_TOOL(RANLIB, ranlib)
-AC_PATH_TOOL(STRIP, strip)
-AC_PATH_TOOL(GCOV, gcov)
-AC_PATH_PROG(LCOV, lcov)
-AC_PATH_PROG(JAVA, java)
-AC_PATH_PROG(GENHTML, genhtml)
-AC_PATH_PROG([GIT], [git])
-AC_PATH_PROG(CCACHE,ccache)
-AC_PATH_PROG(XGETTEXT,xgettext)
-AC_PATH_PROG(HEXDUMP,hexdump)
-PKG_PROG_PKG_CONFIG
-
 # Enable debug 
 AC_ARG_ENABLE([debug],
     [AS_HELP_STRING([--enable-debug],