diff --git a/.circleci/config.yml b/.circleci/config.yml
new file mode 100644
index 000000000..b5c43d017
--- /dev/null
+++ b/.circleci/config.yml
@@ -0,0 +1,63 @@
+version: 2
+jobs:
+  build:
+    working_directory: /root/SRB2
+    docker:
+      - image: debian:jessie
+        environment:
+          CC: ccache gcc -m32
+          PKG_CONFIG_LIBDIR: /usr/lib/i386-linux-gnu/pkgconfig
+          LIBGME_CFLAGS: -I/usr/include
+          LIBGME_LDFLAGS: -lgme
+          CCACHE_COMPRESS: true
+          WFLAGS: -Wno-unsuffixed-float-constants
+          GCC49: true
+      #- image: ubuntu:trusty
+      #  environment:
+      #    CC: ccache gcc -m32
+      #    PKG_CONFIG_LIBDIR: /usr/lib/i386-linux-gnu/pkgconfig
+      #    LIBGME_CFLAGS: -I/usr/include
+      #    LIBGME_LDFLAGS: -lgme
+      #    CCACHE_COMPRESS: true
+      #    WFLAGS: -Wno-unsuffixed-float-constants
+      #    GCC48: true
+    steps:
+      - run:
+          name: Add i386 arch
+          command: dpkg --add-architecture i386
+      - run:
+          name: Update APT listing
+          command: apt-get -qq update
+      - run:
+          name: Support S3 upload
+          command: apt-get -qq -y install ca-certificates
+      - restore_cache:
+          keys:
+            - v1-SRB2-APT
+      - run:
+          name: Install SDK
+          command: apt-get -qq -y install git build-essential nasm libpng12-dev:i386 libsdl2-mixer-dev:i386 libgme-dev:i386 gettext ccache wget gcc-multilib upx
+      - save_cache:
+          key: v1-SRB2-APT
+          paths:
+            - /var/cache/apt/archives
+      - checkout
+      - run:
+          name: Clean build
+          command: make -C src LINUX=1 clean
+      - restore_cache:
+          keys:
+            - v1-SRB2-{{ .Branch }}-{{ checksum "objs/Linux/SDL/Release/depend.dep" }}
+      - run:
+          name: Compile
+          command: make -C src LINUX=1 ERRORMODE=1 -k
+      - store_artifacts:
+          path: /root/SRB2/bin/Linux/Release/
+          destination: bin
+      - save_cache:
+          key: v1-SRB2-{{ .Branch }}-{{ checksum "objs/Linux/SDL/Release/depend.dep" }}
+          paths:
+            - /root/.ccache
+
+
+
diff --git a/README.md b/README.md
index eb06156b4..d16071454 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,7 @@
 
 [![Build status](https://ci.appveyor.com/api/projects/status/399d4hcw9yy7hg2y?svg=true)](https://ci.appveyor.com/project/STJr/srb2)
 [![Build status](https://travis-ci.org/STJr/SRB2.svg?branch=master)](https://travis-ci.org/STJr/SRB2)
+[![CircleCI](https://circleci.com/gh/STJr/SRB2/tree/master.svg?style=svg)](https://circleci.com/gh/STJr/SRB2/tree/master)
 
 [Sonic Robo Blast 2](https://srb2.org/) is a 3D Sonic the Hedgehog fangame based on a modified version of [Doom Legacy](http://doomlegacy.sourceforge.net/).
 
diff --git a/src/r_bsp.c b/src/r_bsp.c
index 2562cff66..44cb991a7 100644
--- a/src/r_bsp.c
+++ b/src/r_bsp.c
@@ -210,7 +210,7 @@ void R_PortalClearClipSegs(INT32 start, INT32 end)
 //
 // It assumes that Doom has already ruled out a door being closed because
 // of front-back closure (e.g. front floor is taller than back ceiling).
-static inline INT32 R_DoorClosed(void)
+static INT32 R_DoorClosed(void)
 {
 	return