Require GCC 4.8 for DISTRHO_DEPRECATED

Signed-off-by: falkTX <falktx@falktx.com>

.github/workflows/example-plugins.yml

@@ -83,7 +83,7 @@ jobs:
       run: |
         sudo dpkg --add-architecture i386
         sudo apt-get update -qq
-        sudo apt-get install -yq g++-multilib libasound2-dev:i386 libgl1-mesa-dev:i386 liblo-dev:i386 libpulse-dev:i386
+        sudo apt-get install -yq g++-multilib libasound2-dev:i386 libcairo2-dev:i386 libgl1-mesa-dev:i386 liblo-dev:i386 libpulse-dev:i386
     - name: Build linux x86
       env:
         CFLAGS: -m32

dgl/Makefile

@@ -14,7 +14,10 @@ BUILD_CXX_FLAGS += -Isrc/pugl-upstream/include
 LINK_FLAGS      += $(DGL_LIBS)
 
 # TODO fix these after pugl-upstream is done
-BUILD_CXX_FLAGS += -Wno-attributes -Wno-extra -Wno-missing-field-initializers -Wno-narrowing
+BUILD_CXX_FLAGS += -Wno-attributes -Wno-extra -Wno-missing-field-initializers
+ifneq ($(MACOS),true)
+BUILD_CXX_FLAGS += -Wno-narrowing
+endif
 
 # ifneq ($(MACOS_OLD),true)
 # needed by sofd right now, fix later

distrho/src/DistrhoDefines.h

@@ -72,7 +72,7 @@
 #endif
 
 /* Define DISTRHO_DEPRECATED */
-#if defined(__GNUC__)
+#if defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__) >= 480
 # define DISTRHO_DEPRECATED __attribute__((deprecated))
 #elif defined(_MSC_VER)
 # define DISTRHO_DEPRECATED [[deprecated]] /* Note: __declspec(deprecated) it not applicable to enum members */
@@ -83,7 +83,7 @@
 /* Define DISTRHO_DEPRECATED_BY */
 #if defined(__clang__) && defined(DISTRHO_PROPER_CPP11_SUPPORT)
 # define DISTRHO_DEPRECATED_BY(other) __attribute__((deprecated("", other)))
-#elif defined(__GNUC__)
+#elif defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__) >= 480
 # define DISTRHO_DEPRECATED_BY(other) __attribute__((deprecated("Use " other)))
 #else
 # define DISTRHO_DEPRECATED_BY(other) DISTRHO_DEPRECATED