[games] Fix building the games on Linux by adding missing libs

games/drturtle/makefile

@@ -112,8 +112,10 @@ ifeq ($(PLATFORM),PLATFORM_DESKTOP)
         # libraries for Debian GNU/Linux desktop compiling
         # requires the following packages:
         # libglfw3-dev libopenal-dev libglew-dev libegl1-mesa-dev
-        LIBS = -lraylib -lglfw -lGLEW -lGL -lopenal
-    endif
+        LIBS = -lraylib -lglfw3 -lGLEW -lGL -lopenal -lm -pthread -ldl
+        # on XWindow could require also below libraries, just uncomment
+        #LIBS += -lX11 -lXrandr -lXinerama -lXi -lXxf86vm -lXcursor
+    else
     ifeq ($(PLATFORM_OS),OSX)
     	# libraries for OS X 10.9 desktop compiling
         # requires the following packages:
@@ -124,6 +126,7 @@ ifeq ($(PLATFORM),PLATFORM_DESKTOP)
         # NOTE: GLFW3 and OpenAL Soft libraries should be installed
         LIBS = -lraylib -lglfw3 -lglew32 -lopengl32 -lopenal32 -lgdi32
     endif
+    endif
 endif
 ifeq ($(PLATFORM),PLATFORM_RPI)
     # libraries for Raspberry Pi compiling

games/just_do/makefile

@@ -117,8 +117,10 @@ ifeq ($(PLATFORM),PLATFORM_DESKTOP)
         # libraries for Debian GNU/Linux desktop compiling
         # requires the following packages:
         # libglfw3-dev libopenal-dev libglew-dev libegl1-mesa-dev
-        LIBS = -lraylib -lglfw -lGLEW -lGL -lopenal
-    endif
+        LIBS = -lraylib -lglfw3 -lGLEW -lGL -lopenal -lm -pthread -ldl
+        # on XWindow could require also below libraries, just uncomment
+        #LIBS += -lX11 -lXrandr -lXinerama -lXi -lXxf86vm -lXcursor
+    else
     ifeq ($(PLATFORM_OS),OSX)
     	# libraries for OS X 10.9 desktop compiling
         # requires the following packages:
@@ -129,6 +131,7 @@ ifeq ($(PLATFORM),PLATFORM_DESKTOP)
         # NOTE: GLFW3 and OpenAL Soft libraries should be installed
         LIBS = -lraylib -lglfw3 -lglew32 -lopengl32 -lopenal32 -lgdi32
     endif
+    endif
 endif
 ifeq ($(PLATFORM),PLATFORM_RPI)
     # libraries for Raspberry Pi compiling

games/raylib_demo/makefile

@@ -117,7 +117,7 @@ ifeq ($(PLATFORM),PLATFORM_DESKTOP)
         # libraries for Debian GNU/Linux desktop compiling
         # requires the following packages:
         # libglfw3-dev libopenal-dev libglew-dev libegl1-mesa-dev
-        LIBS = -lraylib -lglfw3 -lGLEW -lGL -lopenal -lm -pthread
+        LIBS = -lraylib -lglfw3 -lGLEW -lGL -lopenal -lm -pthread -ldl
         # on XWindow could require also below libraries, just uncomment
         #LIBS += -lX11 -lXrandr -lXinerama -lXi -lXxf86vm -lXcursor
     else

games/skully_escape/makefile

@@ -114,8 +114,10 @@ ifeq ($(PLATFORM),PLATFORM_DESKTOP)
         # libraries for Debian GNU/Linux desktop compiling
         # requires the following packages:
         # libglfw3-dev libopenal-dev libglew-dev libegl1-mesa-dev
-        LIBS = -lraylib -lglfw -lGLEW -lGL -lopenal
-    endif
+        LIBS = -lraylib -lglfw3 -lGLEW -lGL -lopenal -lm -pthread -ldl
+        # on XWindow could require also below libraries, just uncomment
+        #LIBS += -lX11 -lXrandr -lXinerama -lXi -lXxf86vm -lXcursor
+    else
     ifeq ($(PLATFORM_OS),OSX)
     	# libraries for OS X 10.9 desktop compiling
         # requires the following packages:
@@ -126,6 +128,7 @@ ifeq ($(PLATFORM),PLATFORM_DESKTOP)
         # NOTE: GLFW3 and OpenAL Soft libraries should be installed
         LIBS = -lraylib -lglfw3 -lglew32 -lopengl32 -lopenal32 -lgdi32
     endif
+    endif
 endif
 ifeq ($(PLATFORM),PLATFORM_RPI)
     # libraries for Raspberry Pi compiling