diff --git a/libretro-build-common.sh b/libretro-build-common.sh
index e65bf9df..d07afad1 100755
--- a/libretro-build-common.sh
+++ b/libretro-build-common.sh
@@ -218,7 +218,7 @@ build_makefile() {
 	fi
 
 	# TODO: Do this better
-	make_cmdline="$make_cmdline platform=\"${core_build_platform:-$FORMAT_COMPILER_TARGET}\""
+	make_cmdline="$make_cmdline platform=\"$core_build_platform\""
 
 	[ -n "$JOBS" ] && make_cmdline="$make_cmdline -j$JOBS"
 
@@ -251,6 +251,8 @@ build_makefile() {
 #
 # $1	Name of the core to build
 libretro_build_core() {
+	local opengl_type
+
 	eval "core_name=\$libretro_${1}_name"
 	[ -z "$core_name" ] && core_name="$1"
 	echo "=== $core_name"
@@ -261,16 +263,36 @@ libretro_build_core() {
 	eval "core_dir=\$libretro_${1}_dir"
 	[ -z "$core_dir" ] && core_dir="libretro-$1"
 
+	eval "core_build_opengl=\$libretro_${1}_build_opengl"
+	if [ -n "$core_build_opengl" ]; then
+		if [[ "$core_build_opengl" = "yes" || "$core_build_opengl" = "optional" ]]; then
+			if [ -n "$BUILD_LIBRETRO_GL" ]; then
+				if [ -n "$ENABLE_GLES" ]; then
+					opengl_type="-gles"
+				else
+					opengl_type="-opengl"
+				fi
+			else
+				if [ "$core_build_opengl" = "yes" ]; then
+					echo "$1 requires OpenGL (which is disabled), skipping..."
+					return 0
+				fi
+			fi
+		else
+			echo "libretro_build_core:Unknown OpenGL setting for $1: \"$core_build_opengl\"."
+			return 1
+		fi
+	fi
+
 	case "$core_build_rule" in
 		build_makefile)
 			eval "core_build_makefile=\$libretro_${1}_build_makefile"
-			eval echo "core_build_makefile=\$libretro_${1}_build_makefile"
-
 			eval "core_build_subdir=\$libretro_${1}_build_subdir"
-			eval echo "core_build_subdir=\$libretro_${1}_build_subdir"
 
+			# TODO: Really, clean this up...
 			eval "core_build_platform=\$libretro_${1}_build_platform"
-			eval echo "core_build_platform=\$libretro_${1}_build_platform"
+			core_build_platform="${core_build_platform:-$FORMAT_COMPILER_TARGET}$opengl_type"
+			eval echo "core_build_platform=\$libretro_${1}_build_platform$opengl_type"
 
 			echo "Building ${1}..."
 			$core_build_rule $1
@@ -326,27 +348,6 @@ build_libretro_emux() {
 	build_save_revision $? "emux"
 }
 
-build_libretro_ffmpeg() {
-	if check_opengl; then
-		build_libretro_generic_makefile "ffmpeg" "libretro" "Makefile" $FORMAT_COMPILER_TARGET
-		reset_compiler_targets
-	fi
-}
-
-build_libretro_3dengine() {
-	if check_opengl; then
-		build_libretro_generic_makefile "3dengine" "." "Makefile" $FORMAT_COMPILER_TARGET
-		reset_compiler_targets
-	fi
-}
-
-build_libretro_ppsspp() {
-	if check_opengl; then
-		build_libretro_generic_makefile "ppsspp" "libretro" "Makefile" $FORMAT_COMPILER_TARGET
-		reset_compiler_targets
-	fi
-}
-
 build_libretro_mame_modern() {
 	build_dir="$WORKDIR/libretro-mame"
 	if [ -d "$build_dir" ]; then
@@ -599,6 +600,9 @@ create_dist_dir
 build_libretro_2048() {
 	libretro_build_core 2048
 }
+build_libretro_3dengine() {
+	libretro_build_core 3dengine
+}
 build_libretro_4do() {
 	libretro_build_core 4do
 }
@@ -653,6 +657,9 @@ build_libretro_fb_alpha() {
 build_libretro_fceumm() {
 	libretro_build_core fceumm
 }
+build_libretro_ffmpeg() {
+	libretro_build_core ffmpeg
+}
 build_libretro_fmsx() {
 	libretro_build_core fmsx
 }
@@ -698,6 +705,9 @@ build_libretro_pcsx_rearmed() {
 build_libretro_picodrive() {
 	libretro_build_core picodrive
 }
+build_libretro_ppsspp() {
+	libretro_build_core ppsspp
+}
 build_libretro_prboom() {
 	libretro_build_core prboom
 }
diff --git a/libretro-build.sh b/libretro-build.sh
index ebc7fe46..c73d582a 100755
--- a/libretro-build.sh
+++ b/libretro-build.sh
@@ -165,12 +165,12 @@ else
 	libretro_build_core dinothawr
 	libretro_build_core virtualjaguar
 	build_libretro_mupen64
-	build_libretro_3dengine
+	libretro_build_core 3dengine
 	if [ $FORMAT_COMPILER_TARGET != "ios" ]; then
 		# These don't currently build on iOS
 		build_libretro_bnes
-		build_libretro_ffmpeg
-		build_libretro_ppsspp
+		build_libretro_core ffmpeg
+		build_libretro_core ppsspp
 	fi
 	libretro_build_core o2em
 	libretro_build_core hatari
diff --git a/rules.d/core-rules.sh b/rules.d/core-rules.sh
index ff9c10c9..0c2d1e59 100644
--- a/rules.d/core-rules.sh
+++ b/rules.d/core-rules.sh
@@ -158,7 +158,8 @@ libretro_mame_git_url="https://github.com/libretro/mame.git"
 
 libretro_ffmpeg_name="FFmpeg"
 libretro_ffmpeg_git_url="https://github.com/libretro/FFmpeg.git"
-# NEED OPENGL CHECK: ffmpeg
+libretro_ffmpeg_build_subdir="libretro"
+libretro_ffmpeg_build_opengl="optional"
 
 libretro_bsnes_cplusplus98_name="bsnes C++98 (v0.85)"
 libretro_bsnes_cplusplus98_git_url="https://github.com/libretro/bsnes-libretro-cplusplus98.git"
@@ -191,7 +192,7 @@ libretro_uae_git_url="https://github.com/libretro/libretro-uae.git"
 
 libretro_3dengine_name="3DEngine"
 libretro_3dengine_git_url="https://github.com/libretro/libretro-3dengine.git"
-# NEED OPENGL CHECK: 3dengine
+libretro_3dengine_build_opengl=yes
 
 libretro_remotejoy_name="RemoteJoy"
 libretro_remotejoy_git_url="https://github.com/libretro/libretro-remotejoy.git"
@@ -214,7 +215,8 @@ libretro_vecx_build_makefile="Makefile.libretro"
 libretro_ppsspp_name="PPSSPP"
 libretro_ppsspp_git_url="https://github.com/libretro/ppsspp.git"
 libretro_ppsspp_git_submodules="yes"
-# NEED OPENGL CHECK: ppsspp
+libretro_ppsspp_build_subdir="libretro"
+libretro_ppsspp_build_opengl="yes"
 
 libretro_prosystem_name="ProSystem"
 libretro_prosystem_git_url="https://github.com/libretro/prosystem-libretro.git"
@@ -291,6 +293,9 @@ libretro_fuse_build_platform="$FORMAT_COMPILER_TARGET_ALT"
 # build_platform			Set to override the default platform
 #								(e.g., $FORMAT_COMPILER_TARGET_ALT)
 #
+# build_opengl				Set to "optional" to use OpenGL/GLES if available
+#								Set to "yes" if the core requires it
+#
 # Example:
 #
 #	libretro_dinothawr_git_url="https://github.com/libretro/Dinothawr.git"