diff --git a/buildSrc/linux.gradle b/buildSrc/linux.gradle
index 6ff94418..beb20522 100644
--- a/buildSrc/linux.gradle
+++ b/buildSrc/linux.gradle
@@ -43,8 +43,11 @@ LINUX.library = { name -> return "lib${name}.so" as String }
 def commonFlags = [
         "-fno-strict-aliasing", "-fPIC", "-fno-omit-frame-pointer", // optimization flags
         "-fstack-protector",
+        "-Wno-error=cast-function-type",
         "-Wextra", "-Wall", "-Wformat-security", "-Wno-unused", "-Wno-parentheses", "-Werror=implicit-function-declaration", "-Werror=trampolines"] // warning flags
 
+commonFlags.addAll(System.getenv("CFLAGS").trim().split(" "))
+
 if (!IS_64) {
     commonFlags += "-m32"
 }
@@ -60,6 +63,8 @@ def linkFlags = ["-static-libgcc", "-static-libstdc++", "-shared", commonFlags,
                  "-z", "relro",
                  "-Wl,--gc-sections"].flatten()
 
+linkFlags.addAll(System.getenv("LDFLAGS").trim().split(" "))
+
 if (IS_DEBUG_NATIVE) {
     linkFlags += "-g"
 }
@@ -222,7 +227,7 @@ FileTree ft_gtk = fileTree("${project(":graphics").projectDir}/src/main/native-g
 LINUX.glass.glass = [:]
 LINUX.glass.glass.nativeSource = ft_gtk_launcher.getFiles()
 LINUX.glass.glass.compiler = compiler
-LINUX.glass.glass.ccFlags = [ccFlags, gtk2CCFlags,  "-Werror"].flatten()
+LINUX.glass.glass.ccFlags = [ccFlags, gtk2CCFlags].flatten()
 LINUX.glass.glass.linker = linker
 LINUX.glass.glass.linkFlags = [linkFlags, "-lX11", "-ldl" ].flatten()
 LINUX.glass.glass.lib = "glass"
@@ -230,7 +235,7 @@ LINUX.glass.glass.lib = "glass"
 LINUX.glass.glassgtk2 = [:]
 LINUX.glass.glassgtk2.nativeSource =  ft_gtk.getFiles()
 LINUX.glass.glassgtk2.compiler = compiler
-LINUX.glass.glassgtk2.ccFlags = [ccFlags, gtk2CCFlags, "-Werror"].flatten()
+LINUX.glass.glassgtk2.ccFlags = [ccFlags, gtk2CCFlags].flatten()
 LINUX.glass.glassgtk2.linker = linker
 LINUX.glass.glassgtk2.linkFlags = [linkFlags, gtk2LinkFlags ].flatten()
 LINUX.glass.glassgtk2.lib = "glassgtk2"
@@ -238,7 +243,7 @@ LINUX.glass.glassgtk2.lib = "glassgtk2"
 LINUX.glass.glassgtk3 = [:]
 LINUX.glass.glassgtk3.nativeSource =  ft_gtk.getFiles()
 LINUX.glass.glassgtk3.compiler = compiler
-LINUX.glass.glassgtk3.ccFlags = [ccFlags, gtk3CCFlags, "-Werror"].flatten()
+LINUX.glass.glassgtk3.ccFlags = [ccFlags, gtk3CCFlags].flatten()
 LINUX.glass.glassgtk3.linker = linker
 LINUX.glass.glassgtk3.linkFlags = [linkFlags, gtk3LinkFlags ].flatten()
 LINUX.glass.glassgtk3.lib = "glassgtk3"
@@ -273,7 +278,7 @@ LINUX.iio.nativeSource = [
 LINUX.iio.compiler = compiler
 LINUX.iio.ccFlags = [ccFlags].flatten()
 LINUX.iio.linker = linker
-LINUX.iio.linkFlags = [linkFlags].flatten()
+LINUX.iio.linkFlags = [linkFlags, "-ljpeg"].flatten()
 LINUX.iio.lib = "javafx_iio"
 
 LINUX.prismES2 = [:]
diff --git a/modules/javafx.media/src/main/native/gstreamer/projects/linux/avplugin/Makefile b/modules/javafx.media/src/main/native/gstreamer/projects/linux/avplugin/Makefile
index 682f1da8..d256ab5e 100644
--- a/modules/javafx.media/src/main/native/gstreamer/projects/linux/avplugin/Makefile
+++ b/modules/javafx.media/src/main/native/gstreamer/projects/linux/avplugin/Makefile
@@ -17,7 +17,7 @@ TARGET = $(BUILD_DIR)/lib$(BASE_NAME).so
 OBJBASE_DIR = $(BUILD_DIR)/obj/plugins/avplugin
 endif
 
-CFLAGS = -fPIC                   \
+CFLAGS := -fPIC                   \
          -Wformat                \
          -Wextra                 \
          -Wformat-security       \
@@ -30,13 +30,8 @@ CFLAGS = -fPIC                   \
          -DLINUX                 \
          -DGST_DISABLE_LOADSAVE  \
          -DGSTREAMER_LITE \
-         -ffunction-sections -fdata-sections
-
-ifeq ($(BUILD_TYPE), Release)
-    CFLAGS += -Os
-else
-    CFLAGS += -g -Wall
-endif
+         -ffunction-sections -fdata-sections \
+         ${CFLAGS}
 
 PACKAGES_INCLUDES := $(shell pkg-config --cflags glib-2.0)
 PACKAGES_LIBS     := $(shell pkg-config --libs glib-2.0 gobject-2.0)
@@ -47,11 +42,12 @@ INCLUDES= -I../../../plugins                          \
           -I../../../gstreamer-lite/gstreamer/libs    \
           $(PACKAGES_INCLUDES)
 
-LDFLAGS = -L$(BUILD_DIR)    \
+LDFLAGS := -L$(BUILD_DIR)    \
           -lgstreamer-lite  \
            $(PACKAGES_LIBS) \
           -z relro          \
-          -static-libgcc -static-libstdc++ -Wl,--gc-sections
+          -static-libgcc -static-libstdc++ -Wl,--gc-sections \
+          ${LDFLAGS}
 
 ifneq ($(strip $(LIBAV_DIR)),)
 INCLUDES += -I$(LIBAV_DIR)/include
diff --git a/modules/javafx.media/src/main/native/gstreamer/projects/linux/fxplugins/Makefile b/modules/javafx.media/src/main/native/gstreamer/projects/linux/fxplugins/Makefile
index c2cd04d2..66c3c6d3 100644
--- a/modules/javafx.media/src/main/native/gstreamer/projects/linux/fxplugins/Makefile
+++ b/modules/javafx.media/src/main/native/gstreamer/projects/linux/fxplugins/Makefile
@@ -14,7 +14,7 @@ DIRLIST = progressbuffer       \
 
 TARGET = $(BUILD_DIR)/lib$(BASE_NAME).so
 
-CFLAGS = -fPIC                   \
+CFLAGS := -fPIC                   \
          -Wformat                \
          -Wextra                 \
          -Wformat-security       \
@@ -31,14 +31,8 @@ CFLAGS = -fPIC                   \
          -DGST_DISABLE_LOADSAVE  \
          -DGST_DISABLE_GST_DEBUG \
          -DGSTREAMER_LITE \
-         -ffunction-sections -fdata-sections
-
-ifeq ($(BUILD_TYPE), Release)
-    CFLAGS += -Os
-else
-    CFLAGS += -g -Wall
-endif
-
+         -ffunction-sections -fdata-sections \
+         ${CFLAGS}
 
 INCLUDES = -I$(SRCBASE_DIR) \
 	   $(addprefix -I$(SRCBASE_DIR)/,$(DIRLIST)) \
@@ -48,9 +42,10 @@ INCLUDES = -I$(SRCBASE_DIR) \
 PACKAGES_INCLUDES := $(shell pkg-config --cflags glib-2.0)
 PACKAGES_LIBS := $(shell pkg-config --libs glib-2.0 gobject-2.0)
 
-LDFLAGS = -L$(BUILD_DIR) -lgstreamer-lite $(PACKAGES_LIBS) \
+LDFLAGS := -L$(BUILD_DIR) -lgstreamer-lite $(PACKAGES_LIBS) \
           -z relro \
-          -static-libgcc -static-libstdc++ -Wl,--gc-sections
+          -static-libgcc -static-libstdc++ -Wl,--gc-sections \
+          ${LDFLAGS}
 
 ifeq ($(ARCH), x32)
     CFLAGS += -m32
diff --git a/modules/javafx.media/src/main/native/gstreamer/projects/linux/gstreamer-lite/Makefile b/modules/javafx.media/src/main/native/gstreamer/projects/linux/gstreamer-lite/Makefile
index 379e14ed..84855238 100644
--- a/modules/javafx.media/src/main/native/gstreamer/projects/linux/gstreamer-lite/Makefile
+++ b/modules/javafx.media/src/main/native/gstreamer/projects/linux/gstreamer-lite/Makefile
@@ -37,7 +37,7 @@ DIRLIST = gstreamer/gst \
 
 TARGET = $(BUILD_DIR)/lib$(BASE_NAME).so
 
-CFLAGS =-fPIC                   \
+CFLAGS :=-fPIC                   \
         -Wformat                \
         -Wextra                 \
         -Wformat-security       \
@@ -52,13 +52,8 @@ CFLAGS =-fPIC                   \
         -DLINUX                 \
         -DGST_DISABLE_GST_DEBUG \
         -DGST_DISABLE_LOADSAVE  \
-        -ffunction-sections -fdata-sections
-
-ifeq ($(BUILD_TYPE), Release)
-    CFLAGS += -Os
-else
-    CFLAGS += -g -Wall
-endif
+        -ffunction-sections -fdata-sections \
+        ${CFLAGS}
 
 INCLUDES = -I$(BASE_DIR)/plugins                          \
 	   -I$(SRCBASE_DIR)/projects/build/linux/common   \
@@ -76,9 +71,10 @@ INCLUDES = -I$(BASE_DIR)/plugins                          \
 PACKAGES_INCLUDES := $(shell pkg-config --cflags alsa glib-2.0)
 PACKAGES_LIBS := $(shell pkg-config --libs alsa glib-2.0 gobject-2.0 gmodule-2.0 gthread-2.0)
 
-LDFLAGS = -L$(BUILD_DIR) -lm $(PACKAGES_LIBS) \
+LDFLAGS := -L$(BUILD_DIR) -lm $(PACKAGES_LIBS) \
           -z relro \
-          -static-libgcc -static-libstdc++ -Wl,--gc-sections
+          -static-libgcc -static-libstdc++ -Wl,--gc-sections \
+          ${LDFLAGS}
 
 ifeq ($(ARCH), x32)
     CFLAGS += -m32
diff --git a/modules/javafx.media/src/main/native/jfxmedia/projects/linux/Makefile b/modules/javafx.media/src/main/native/jfxmedia/projects/linux/Makefile
index e8e08277..5c5ec7e2 100644
--- a/modules/javafx.media/src/main/native/jfxmedia/projects/linux/Makefile
+++ b/modules/javafx.media/src/main/native/jfxmedia/projects/linux/Makefile
@@ -17,7 +17,7 @@ DIRLIST = jni                \
 
 TARGET = $(BUILD_DIR)/lib$(BASE_NAME).so
 
-CFLAGS = -DTARGET_OS_LINUX=1     \
+CFLAGS := -DTARGET_OS_LINUX=1     \
          -D_GNU_SOURCE           \
          -DGST_REMOVE_DEPRECATED \
          -DGST_DISABLE_GST_DEBUG \
@@ -26,7 +26,8 @@ CFLAGS = -DTARGET_OS_LINUX=1     \
          -DHAVE_CONFIG_H         \
          -DJFXMEDIA_JNI_EXPORTS  \
          -DLINUX                 \
-         -ffunction-sections -fdata-sections
+         -ffunction-sections -fdata-sections \
+         ${CFLAGS}
 
 CPPFLAGS = -fno-rtti -ffunction-sections -fdata-sections
 
@@ -57,21 +58,16 @@ ifdef HOST_COMPILE
 	           -I$(GSTREAMER_LITE_DIR)/gstreamer/libs \
 		  $(PACKAGES_INCLUDES)
 
-	LDFLAGS = -Wl,-rpath,\$$ORIGIN -L$(BUILD_DIR) -lgstreamer-lite $(PACKAGES_LIBS) \
+	LDFLAGS := -Wl,-rpath,\$$ORIGIN -L$(BUILD_DIR) -lgstreamer-lite $(PACKAGES_LIBS) \
             -z relro \
-            -static-libgcc -static-libstdc++ -Wl,--gc-sections
+            -static-libgcc -static-libstdc++ -Wl,--gc-sections \
+            ${LDFLAGS}
 else
 	CFLAGS += $(EXTRA_CFLAGS)
 	INCLUDES = $(BASE_INCLUDES)
 	LDFLAGS = -Wl,-rpath,\$$ORIGIN -L$(BUILD_DIR) $(EXTRA_LDFLAGS)
 endif
 
-ifeq ($(BUILD_TYPE), Release)
-	CFLAGS += -Os
-else
-	CFLAGS += -g -Wall -D_DEBUG
-endif
-
 ifeq ($(ARCH), x32)
     CFLAGS += -m32
     LDFLAGS += -m32