From 8bbed3573616ade1e578116f18be565a3c66ae8e Mon Sep 17 00:00:00 2001
From: tqchen <tianqi.tchen@gmail.com>
Date: Thu, 28 May 2015 10:44:19 -0700
Subject: [PATCH] modify

---
 Makefile       | 9 ++++++++-
 guide/basic.cc | 8 ++++++--
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/Makefile b/Makefile
index e2a96eb43..2260148de 100644
--- a/Makefile
+++ b/Makefile
@@ -4,7 +4,14 @@ endif
 export MPICXX = mpicxx
 export LDFLAGS= -Llib -lrt
 export WARNFLAGS= -Wall -Wextra -Wno-unused-parameter -Wno-unknown-pragmas -pedantic 
-export CFLAGS = -O3 -msse2 -fPIC $(WARNFLAGS) 
+export CFLAGS = -O3 -msse2 $(WARNFLAGS) 
+
+ifndef WITH_FPIC
+	WITH_FPIC = 1
+endif
+ifeq ($(WITH_FPIC), 1)
+	CFLAGS += -fPIC	
+endif
 
 # build path
 BPATH=.
diff --git a/guide/basic.cc b/guide/basic.cc
index 62c0fc165..803ce7466 100644
--- a/guide/basic.cc
+++ b/guide/basic.cc
@@ -5,11 +5,15 @@
  *
  * \author Tianqi Chen
  */
+#include <vector>
 #include <rabit.h>
 using namespace rabit;
-const int N = 3;
 int main(int argc, char *argv[]) {
-  int a[N];
+  int N = 3;
+  if (argc > 1) {
+    N = atoi(argv[1]);
+  }
+  std::vector<int> a(N);
   rabit::Init(argc, argv);
   for (int i = 0; i < N; ++i) {
     a[i] = rabit::GetRank() + i;