GL3: build ref_gles3 in addition to ref_gl3

instead of making it a compile-time option, just build both

Makefile

@@ -53,9 +53,6 @@ WITH_OPENAL:=yes
 # or libopenal.so. Not supported on Windows.
 WITH_RPATH:=yes
 
-# if set to yes, use OpenGL ES 3.0 instead of desktop OpenGL 3
-GL3_GLES3:=no
-
 # Enable systemwide installation of game assets.
 WITH_SYSTEMWIDE:=no
 
@@ -303,15 +300,6 @@ endif
 
 # ----------
 
-# Local includes for GLAD.
-ifeq ($(GL3_GLES3),yes)
-GLAD_INCLUDE = -Isrc/client/refresh/gl3/glad-gles3/include
-else
-GLAD_INCLUDE = -Isrc/client/refresh/gl3/glad/include
-endif
-
-# ----------
-
 # Base LDFLAGS. This is just the library path.
 ifeq ($(YQ2_OSTYPE),Linux)
 LDFLAGS ?= -L/usr/lib
@@ -394,12 +382,12 @@ endif
 # ----------
 
 # Phony targets
-.PHONY : all client game icon server ref_gl1 ref_gl3 ref_soft
+.PHONY : all client game icon server ref_gl1 ref_gl3 ref_gles3 ref_soft
 
 # ----------
 
 # Builds everything
-all: config client server game ref_gl1 ref_gl3 ref_soft
+all: config client server game ref_gl1 ref_gl3 ref_gles3 ref_soft
 
 # ----------
 
@@ -413,7 +401,6 @@ config:
 	@echo "WITH_RPATH = $(WITH_RPATH)"
 	@echo "WITH_SYSTEMWIDE = $(WITH_SYSTEMWIDE)"
 	@echo "WITH_SYSTEMDIR = $(WITH_SYSTEMDIR)"
-	@echo "GL3_GLES3 = $(GL3_GLES3)"
 	@echo "============================"
 	@echo ""
 
@@ -626,45 +613,28 @@ ref_gl3:
 	@echo "===> Building ref_gl3.dll"
 	$(MAKE) release/ref_gl3.dll
 
+release/ref_gl3.dll : GLAD_INCLUDE = -Isrc/client/refresh/gl3/glad/include
 release/ref_gl3.dll : LDFLAGS += -shared
 
-ifeq ($(GL3_GLES3),yes)
-# YQ2_GL3_GLES3 is for GLES3, DYQ2_GL3_GLES is for things that are identical
-# in both GLES3 and GLES2 (in case we ever support that)
-release/ref_gl3.dll : CFLAGS += -DYQ2_GL3_GLES3 -DYQ2_GL3_GLES
-endif
-
 else ifeq ($(YQ2_OSTYPE), Darwin)
 
 ref_gl3:
 	@echo "===> Building ref_gl3.dylib"
 	$(MAKE) release/ref_gl3.dylib
 
-
+release/ref_gl3.dylib : GLAD_INCLUDE = -Isrc/client/refresh/gl3/glad/include
 release/ref_gl3.dylib : LDFLAGS += -shared
 
-ifeq ($(GL3_GLES3),yes)
-# YQ2_GL3_GLES3 is for GLES3, DYQ2_GL3_GLES is for things that are identical
-# in both GLES3 and GLES2 (in case we ever support that)
-release/ref_gl3.dylib : CFLAGS += -DYQ2_GL3_GLES3 -DYQ2_GL3_GLES
-endif
-
 else # not Windows or Darwin
 
 ref_gl3:
 	@echo "===> Building ref_gl3.so"
 	$(MAKE) release/ref_gl3.so
 
-
+release/ref_gl3.so : GLAD_INCLUDE = -Isrc/client/refresh/gl3/glad/include
 release/ref_gl3.so : CFLAGS += -fPIC
 release/ref_gl3.so : LDFLAGS += -shared
 
-ifeq ($(GL3_GLES3),yes)
-# YQ2_GL3_GLES3 is for GLES3, DYQ2_GL3_GLES is for things that are identical
-# in both GLES3 and GLES2 (in case we ever support that)
-release/ref_gl3.so : CFLAGS += -DYQ2_GL3_GLES3 -DYQ2_GL3_GLES
-endif
-
 endif # OS specific ref_gl3 stuff
 
 build/ref_gl3/%.o: %.c
@@ -674,6 +644,61 @@ build/ref_gl3/%.o: %.c
 
 # ----------
 
+# The OpenGL ES 3.0 renderer lib
+
+ifeq ($(YQ2_OSTYPE), Windows)
+
+ref_gles3:
+	@echo "===> Building ref_gles3.dll"
+	$(MAKE) release/ref_gles3.dll
+
+release/ref_gles3.dll : GLAD_INCLUDE = -Isrc/client/refresh/gl3/glad-gles3/include
+
+# YQ2_GL3_GLES3 is for GLES3, DYQ2_GL3_GLES is for things that are identical
+# in both GLES3 and GLES2 (in case we ever support that)
+release/ref_gles3.dll : CFLAGS += -DYQ2_GL3_GLES3 -DYQ2_GL3_GLES
+
+release/ref_gles3.dll : LDFLAGS += -shared
+
+else ifeq ($(YQ2_OSTYPE), Darwin)
+
+ref_gles3:
+	@echo "===> Building ref_gles3.dylib"
+	$(MAKE) release/ref_gles3.dylib
+
+release/ref_gles3.dylib : GLAD_INCLUDE = -Isrc/client/refresh/gl3/glad-gles3/include
+
+# YQ2_GL3_GLES3 is for GLES3, DYQ2_GL3_GLES is for things that are identical
+# in both GLES3 and GLES2 (in case we ever support that)
+release/ref_gles3.dylib : CFLAGS += -DYQ2_GL3_GLES3 -DYQ2_GL3_GLES
+
+release/ref_gles3.dylib : LDFLAGS += -shared
+
+else # not Windows or Darwin
+
+ref_gles3:
+	@echo "===> Building ref_gles3.so"
+	$(MAKE) release/ref_gles3.so
+
+release/ref_gles3.so : GLAD_INCLUDE = -Isrc/client/refresh/gl3/glad-gles3/include
+
+# YQ2_GL3_GLES3 is for GLES3, DYQ2_GL3_GLES is for things that are identical
+# in both GLES3 and GLES2 (in case we ever support that)
+release/ref_gles3.so : CFLAGS += -DYQ2_GL3_GLES3 -DYQ2_GL3_GLES -fPIC
+
+release/ref_gles3.so : LDFLAGS += -shared
+
+GLAD_INCLUDE = -Isrc/client/refresh/gl3/glad-gles3/include
+
+endif # OS specific ref_gl3 stuff
+
+build/ref_gles3/%.o: %.c
+	@echo "===> CC $<"
+	${Q}mkdir -p $(@D)
+	${Q}$(CC) -c $(CFLAGS) $(SDLCFLAGS) $(INCLUDE) $(GLAD_INCLUDE) -o $@ $<
+
+# ----------
+
 # The soft renderer lib
 
 ifeq ($(YQ2_OSTYPE), Windows)
@@ -948,13 +973,11 @@ REFGL3_OBJS_ := \
 	src/common/shared/shared.o \
 	src/common/md4.o
 
-ifeq ($(GL3_GLES3),yes)
+REFGL3_OBJS_GLADE_ := \
-REFGL3_OBJS_ += \
-	src/client/refresh/gl3/glad-gles3/src/glad.o
-else # desktop GL3 (not ES)
-REFGL3_OBJS_ += \
 	src/client/refresh/gl3/glad/src/glad.o
-endif
+
+REFGL3_OBJS_GLADEES_ := \
+	src/client/refresh/gl3/glad-gles3/src/glad.o
 
 ifeq ($(YQ2_OSTYPE), Windows)
 REFGL3_OBJS_ += \
@@ -1056,6 +1079,9 @@ endif
 CLIENT_OBJS = $(patsubst %,build/client/%,$(CLIENT_OBJS_))
 REFGL1_OBJS = $(patsubst %,build/ref_gl1/%,$(REFGL1_OBJS_))
 REFGL3_OBJS = $(patsubst %,build/ref_gl3/%,$(REFGL3_OBJS_))
+REFGL3_OBJS += $(patsubst %,build/ref_gl3/%,$(REFGL3_OBJS_GLADE_))
+REFGLES3_OBJS = $(patsubst %,build/ref_gles3/%,$(REFGL3_OBJS_))
+REFGLES3_OBJS += $(patsubst %,build/ref_gles3/%,$(REFGL3_OBJS_GLADEES_))
 REFSOFT_OBJS = $(patsubst %,build/ref_soft/%,$(REFSOFT_OBJS_))
 SERVER_OBJS = $(patsubst %,build/server/%,$(SERVER_OBJS_))
 GAME_OBJS = $(patsubst %,build/baseq2/%,$(GAME_OBJS_))
@@ -1067,6 +1093,7 @@ CLIENT_DEPS= $(CLIENT_OBJS:.o=.d)
 GAME_DEPS= $(GAME_OBJS:.o=.d)
 REFGL1_DEPS= $(REFGL1_OBJS:.o=.d)
 REFGL3_DEPS= $(REFGL3_OBJS:.o=.d)
+REFGLES3_DEPS= $(REFGLES3_OBJS:.o=.d)
 REFSOFT_DEPS= $(REFSOFT_OBJS:.o=.d)
 SERVER_DEPS= $(SERVER_OBJS:.o=.d)
 
@@ -1075,6 +1102,7 @@ SERVER_DEPS= $(SERVER_OBJS:.o=.d)
 -include $(GAME_DEPS)
 -include $(REFGL1_DEPS)
 -include $(REFGL3_DEPS)
+-include $(REFGLES3_DEPS)
 -include $(SERVER_DEPS)
 
 # ----------
@@ -1138,6 +1166,22 @@ release/ref_gl3.so : $(REFGL3_OBJS)
 	${Q}$(CC) $(LDFLAGS) $(REFGL3_OBJS) $(LDLIBS) $(SDLLDFLAGS) -o $@
 endif
 
+# release/ref_gles3.so
+ifeq ($(YQ2_OSTYPE), Windows)
+release/ref_gles3.dll : $(REFGLES3_OBJS)
+	@echo "===> LD $@"
+	${Q}$(CC) $(LDFLAGS) $(REFGLES3_OBJS) $(LDLIBS) $(DLL_SDLLDFLAGS) -o $@
+	$(Q)strip $@
+else ifeq ($(YQ2_OSTYPE), Darwin)
+release/ref_gles3.dylib : $(REFGLES3_OBJS)
+	@echo "===> LD $@"
+	${Q}$(CC) $(LDFLAGS) $(REFGLES3_OBJS) $(LDLIBS) $(SDLLDFLAGS) -o $@
+else
+release/ref_gles3.so : $(REFGLES3_OBJS)
+	@echo "===> LD $@"
+	${Q}$(CC) $(LDFLAGS) $(REFGLES3_OBJS) $(LDLIBS) $(SDLLDFLAGS) -o $@
+endif
+
 # release/ref_soft.so
 ifeq ($(YQ2_OSTYPE), Windows)
 release/ref_soft.dll : $(REFSOFT_OBJS)