diff --git a/.circleci/config.yml b/.circleci/config.yml
index 3129c3bd..c3674a9e 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -36,7 +36,7 @@ jobs:
             - v1-SRB2-APT
       - run:
           name: Install SDK
-          command: apt-get -qq -y --no-install-recommends install git build-essential nasm libpng12-dev:i386 libsdl2-mixer-dev:i386 libgme-dev:i386 gettext ccache wget gcc-multilib upx
+          command: apt-get -qq -y --no-install-recommends install git build-essential nasm libpng12-dev:i386 libsdl2-mixer-dev:i386 libgme-dev:i386 gettext ccache wget gcc-multilib upx openssh-client
       - save_cache:
           key: v1-SRB2-APT
           paths:
diff --git a/.travis.yml b/.travis.yml
index 1131bff3..4bfc5886 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,6 +15,7 @@ matrix:
               - p7zip-full
               - gcc-4.4
           compiler: gcc-4.4
+          env: GCC44=1
           #gcc-4.4 (Ubuntu/Linaro 4.4.7-8ubuntu1) 4.4.7
         - os: linux
           addons:
@@ -27,6 +28,7 @@ matrix:
               - p7zip-full
               - gcc-4.6
           compiler: gcc-4.6
+          env: GCC46=1
           #gcc-4.6 (Ubuntu/Linaro 4.6.4-6ubuntu2) 4.6.4
         - os: linux
           addons:
@@ -39,9 +41,11 @@ matrix:
               - p7zip-full
               - gcc-4.7
           compiler: gcc-4.7
+          env: GCC47=1
           #gcc-4.7
         - os: linux
           compiler: gcc
+          env: GCC48=1
           #gcc (Ubuntu 4.8.4-2ubuntu1~14.04) 4.8.4
         - os: linux
           addons:
@@ -56,6 +60,7 @@ matrix:
               - p7zip-full
               - gcc-4.8
           compiler: gcc-4.8
+          env: GCC48=1
           #gcc-4.8 (Ubuntu 4.8.5-2ubuntu1~14.04.1) 4.8.5
         - os: linux
           addons:
@@ -70,7 +75,7 @@ matrix:
               - p7zip-full
               - gcc-7
           compiler: gcc-7
-          env: WFLAGS="-Wno-tautological-compare -Wno-error=implicit-fallthrough -Wno-implicit-fallthrough"
+          env: WFLAGS="-Wno-tautological-compare -Wno-error=implicit-fallthrough -Wno-implicit-fallthrough" GCC72=1
           #gcc-7 (Ubuntu 7.2.0-1ubuntu1~14.04) 7.2.0 20170802
         - os: linux
           addons:
@@ -85,7 +90,7 @@ matrix:
               - p7zip-full
               - gcc-8
           compiler: gcc-8
-          env: WFLAGS="-Wno-tautological-compare -Wno-error=implicit-fallthrough -Wno-implicit-fallthrough -Wno-error=format-overflow"
+          env: WFLAGS="-Wno-tautological-compare -Wno-error=implicit-fallthrough -Wno-implicit-fallthrough -Wno-error=format-overflow" GCC81=1
           #gcc-8 (Ubuntu 7.2.0-1ubuntu1~14.04) 8.1.0
         - os: linux
           compiler: clang
diff --git a/src/Makefile.cfg b/src/Makefile.cfg
index 9e624cc7..a0398154 100644
--- a/src/Makefile.cfg
+++ b/src/Makefile.cfg
@@ -7,6 +7,10 @@
 # and other things
 #
 
+ifdef GCC81
+GCC80=1
+endif
+
 ifdef GCC80
 GCC72=1
 endif
@@ -116,6 +120,7 @@ WFLAGS+=-Wfloat-equal
 #WFLAGS+=-Wtraditional
 ifdef VCHELP
  WFLAGS+=-Wdeclaration-after-statement
+ WFLAGS+=-Wno-error=declaration-after-statement
 endif
  WFLAGS+=-Wundef
 ifndef GCC295
@@ -189,12 +194,6 @@ ifdef GCC46
 WFLAGS+=-Wno-suggest-attribute=noreturn
 endif
 
-ifndef MINGW
-ifdef GCC45
-WFLAGS+=-Wunsuffixed-float-constants
-endif
-endif
-
 ifdef NOLDWARNING
 LDFLAGS+=-Wl,--as-needed
 endif
@@ -208,6 +207,9 @@ WFLAGS+=$(OLDWFLAGS)
 ifdef GCC43
  #WFLAGS+=-Wno-error=clobbered
 endif
+ifdef GCC44
+ WFLAGS+=-Wno-error=array-bounds
+endif
 ifdef GCC46
  WFLAGS+=-Wno-error=suggest-attribute=noreturn
 endif
diff --git a/src/d_clisrv.c b/src/d_clisrv.c
index 2529b05d..a0f9f40a 100644
--- a/src/d_clisrv.c
+++ b/src/d_clisrv.c
@@ -2415,6 +2415,8 @@ static void CL_RemovePlayer(INT32 playernum, INT32 reason)
 
 #ifdef HAVE_BLUA
 	LUAh_PlayerQuit(&players[playernum], reason); // Lua hook for player quitting
+#else
+	(void)reason;
 #endif
 
 	// Reset player data
diff --git a/src/w_wad.c b/src/w_wad.c
index b5aa95fa..4f014208 100644
--- a/src/w_wad.c
+++ b/src/w_wad.c
@@ -185,6 +185,7 @@ FILE *W_OpenWadFile(const char **filename, boolean useerrors)
 static inline void W_LoadDehackedLumpsPK3(UINT16 wadnum)
 {
 	UINT16 posStart, posEnd;
+#ifdef HAVE_BLUA
 	posStart = W_CheckNumForFolderStartPK3("Lua/", wadnum, 0);
 	if (posStart != INT16_MAX)
 	{
@@ -193,6 +194,7 @@ static inline void W_LoadDehackedLumpsPK3(UINT16 wadnum)
 		for (; posStart < posEnd; posStart++)
 			LUA_LoadLump(wadnum, posStart);
 	}
+#endif
 	posStart = W_CheckNumForFolderStartPK3("SOC/", wadnum, 0);
 	if (posStart != INT16_MAX)
 	{
@@ -792,9 +794,11 @@ UINT16 W_InitFile(const char *filename)
 		CONS_Printf(M_GetText("Loading SOC from %s\n"), wadfile->filename);
 		DEH_LoadDehackedLumpPwad(numwadfiles - 1, 0);
 		break;
+#ifdef HAVE_BLUA
 	case RET_LUA:
 		LUA_LoadLump(numwadfiles - 1, 0);
 		break;
+#endif
 	default:
 		break;
 	}