From b928c9f01d02fcf2f115f06ee7a2c02d5c6a0ca2 Mon Sep 17 00:00:00 2001
From: Christian Puhrsch <cpuhrsch@fb.com>
Date: Fri, 8 Dec 2017 14:14:13 -0800
Subject: [PATCH] support debian:wheezy

Summary: Small C++ changes to extend support

Differential Revision: D6520761

fbshipit-source-id: 841cdd479d3f53c83902b19dee1524a641967509
---
 .circleci/config.yml      | 14 ++++++++++++++
 .circleci/setup_debian.sh | 12 ++++++++++++
 CMakeLists.txt            |  2 +-
 README.md                 | 14 ++++++++++----
 src/dictionary.cc         |  1 +
 src/model.cc              |  1 +
 6 files changed, 39 insertions(+), 5 deletions(-)
 create mode 100755 .circleci/setup_debian.sh

diff --git a/.circleci/config.yml b/.circleci/config.yml
index 622be1943..fcf460846 100755
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -123,6 +123,19 @@ jobs:
           command: |
             . .circleci/gcc_test.sh
 
+  "debian-wheezy":
+    docker:
+      - image: debian:wheezy
+    working_directory: ~/repo
+    steps:
+      - checkout
+      - run:
+          command: |
+            . .circleci/setup_debian.sh
+            . .circleci/gcc_test.sh
+            . .circleci/cmake_test.sh
+
+
   "website-build":
     docker:
       - image: node:latest
@@ -149,4 +162,5 @@ workflows:
       - "gcc6"
       - "gcc7"
       - "gcclatest"
+      - "debian-wheezy"
       - "website-build"
diff --git a/.circleci/setup_debian.sh b/.circleci/setup_debian.sh
new file mode 100755
index 000000000..d103386c2
--- /dev/null
+++ b/.circleci/setup_debian.sh
@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+#
+# Copyright (c) 2016-present, Facebook, Inc.
+# All rights reserved.
+#
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree. An additional grant
+# of patent rights can be found in the PATENTS file in the same directory.
+#
+
+apt-get update
+apt-get install -y vim g++ make cmake wget git
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 39a5bba58..a68043784 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,7 +7,7 @@
 # of patent rights can be found in the PATENTS file in the same directory.
 #
 
-cmake_minimum_required(VERSION 3.0.2)
+cmake_minimum_required(VERSION 2.8.9)
 project(fasttext)
 
 # The version number.
diff --git a/README.md b/README.md
index 7222cbfa4..7d0fb3c71 100644
--- a/README.md
+++ b/README.md
@@ -48,14 +48,18 @@ We also provide a [cheatsheet](https://fasttext.cc/docs/en/cheatsheet.html#conte
 
 ## Requirements
 
-**fastText** builds on modern Mac OS and Linux distributions.
-Since it uses C++11 features, it requires a compiler with good C++11 support.
+We are continously building and testing our library, CLI and Python bindings under various docker images using [circleci](https://circleci.com/).
+
+Generally, **fastText** builds on modern Mac OS and Linux distributions.
+Since it uses some C++11 features, it requires a compiler with good C++11 support.
 These include :
 
-* (gcc-4.8.5 or newer) or (clang-3.3 or newer)
+* (g++-4.7.2 or newer) or (clang-3.3 or newer)
 
 Compilation is carried out using a Makefile, so you will need to have a working **make**.
-If you want to use **cmake** you need at least version 3.5.2.
+If you want to use **cmake** you need at least version 2.8.9.
+
+One of the oldest distributions we successfully built and tested the CLI under is [Debian wheezy](https://www.debian.org/releases/wheezy/).
 
 For the word-similarity evaluation script you will need:
 
@@ -68,6 +72,8 @@ For the python bindings (see the subdirectory python) you will need:
 * NumPy & SciPy
 * [pybind11](https://github.com/pybind/pybind11)
 
+One of the oldest distributions we successfully built and tested the Python bindings under is [Debian jessie](https://www.debian.org/releases/jessie/).
+
 If these requirements make it impossible for you to use fastText, please open an issue and we will try to accommodate you.
 
 ## Building fastText
diff --git a/src/dictionary.cc b/src/dictionary.cc
index 56f96b52a..707310e3a 100644
--- a/src/dictionary.cc
+++ b/src/dictionary.cc
@@ -16,6 +16,7 @@
 #include <algorithm>
 #include <iterator>
 #include <cmath>
+#include <stdexcept>
 
 namespace fasttext {
 
diff --git a/src/model.cc b/src/model.cc
index 264e0032f..dad1fa7bb 100644
--- a/src/model.cc
+++ b/src/model.cc
@@ -12,6 +12,7 @@
 #include <iostream>
 #include <assert.h>
 #include <algorithm>
+#include <stdexcept>
 
 namespace fasttext {