THRIFT-2602: Fix missing dist files
Client: build process
Patch: jfarrell

Add check for php extension to not build if phpize has not been run,
update Vagrantfile to update package list for haskell test deps, and
change bison min version to 2.4 to work with the current versions of
debian, ubuntu and centos.
diff --git a/.gitignore b/.gitignore
index f4a4b65..e9fb81c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -196,6 +196,7 @@
 /lib/php/src/packages/
 /lib/php/test/phpunit.xml
 /lib/php/test/packages/
+/lib/py/dist/
 /lib/erl/logs/
 /libtool
 /ltmain.sh
diff --git a/aclocal/ac_prog_bison.m4 b/aclocal/ac_prog_bison.m4
index 1e2d200..c74b4f1 100644
--- a/aclocal/ac_prog_bison.m4
+++ b/aclocal/ac_prog_bison.m4
@@ -1,6 +1,6 @@
 dnl
 dnl Check Bison version
-dnl AC_PROG_BISON([MIN_VERSION=2.6])
+dnl AC_PROG_BISON([MIN_VERSION=2.4])
 dnl
 dnl Will define BISON_USE_PARSER_H_EXTENSION if Automake is < 1.11
 dnl for use with .h includes.
@@ -8,7 +8,7 @@
 
 AC_DEFUN([AC_PROG_BISON], [
 if test "x$1" = "x" ; then
-  bison_required_version="2.6"
+  bison_required_version="2.4"
 else
   bison_required_version="$1"
 fi
@@ -27,7 +27,7 @@
   if test "$bison_version" \< "$bison_required_version" ; then
     BISON=:
     AC_MSG_RESULT([no])
-    AC_MSG_ERROR([Bison version 2.6 or higher must be installed on the system!])
+    AC_MSG_ERROR([Bison version 2.4 or higher must be installed on the system!])
   else
     AC_MSG_RESULT([yes])
     BISON=bison
diff --git a/configure.ac b/configure.ac
index 49d704e..065ac68 100755
--- a/configure.ac
+++ b/configure.ac
@@ -265,10 +265,12 @@
 
 AX_THRIFT_LIB(php_extension, [PHP_EXTENSION], yes)
 if test "$with_php_extension" = "yes"; then
-  AC_PATH_PROG([PHP_CONFIG], [php-config])
-  if test -n "$PHP_CONFIG" ; then
-    AC_CONFIG_SUBDIRS([lib/php/src/ext/thrift_protocol])
-    have_php_extension="yes"
+  if test -f "lib/php/src/ext/thrift_protocol/configure"; then
+    AC_PATH_PROG([PHP_CONFIG], [php-config])
+    if test -n "$PHP_CONFIG" ; then
+      AC_CONFIG_SUBDIRS([lib/php/src/ext/thrift_protocol])
+      have_php_extension="yes"
+    fi
   fi
 fi
 AM_CONDITIONAL(WITH_PHP_EXTENSION, [test "$have_php_extension" = "yes"])
diff --git a/contrib/Vagrantfile b/contrib/Vagrantfile
index a638587..5eec59f 100644
--- a/contrib/Vagrantfile
+++ b/contrib/Vagrantfile
@@ -67,6 +67,7 @@
 
 # Haskell dependencies
 sudo apt-get install -qq ghc cabal-install libghc-binary-dev libghc-network-dev libghc-http-dev libghc-hashable-dev libghc-unordered-containers-dev libghc-vector-dev
+sudo cabal update
 
 # Lua dependencies
 sudo apt-get install -qq lua5.2 lua5.2-dev
diff --git a/lib/php/Makefile.am b/lib/php/Makefile.am
index c7fbad3..d1a560a 100755
--- a/lib/php/Makefile.am
+++ b/lib/php/Makefile.am
@@ -22,11 +22,10 @@
 SUBDIRS = test
 endif
 
-%.so:
-	cd src/ext/thrift_protocol/ \
-	  && $(MAKE)
-
 if WITH_PHP_EXTENSION
+%.so:
+	cd src/ext/thrift_protocol/ && $(MAKE)
+
 phpconfdir=$(PHP_CONFIG_PREFIX)
 phpconf_DATA=thrift_protocol.ini