fix(build): update Ubuntu version in workflow and remove deprecated C++ ABI flags for Linux builds

Author: Gioee

.github/workflows/main.yml

@@ -15,7 +15,7 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - os: ubuntu-latest
+          - os: ubuntu-22.04
             arch: x86_64
             name: linux
             make: LLAMA="-DGGML_NATIVE=OFF -DGGML_VULKAN=ON -DGGML_OPENCL=ON -DGGML_LLAMAFILE=ON" WHISPER="-DGGML_VULKAN=ON -DGGML_OPENCL=ON -DGGML_LLAMAFILE=ON"

Makefile

@@ -253,12 +253,9 @@ else ifeq ($(PLATFORM),isim)
 else # linux
 	TARGET := $(DIST_DIR)/ai.so
 	LDFLAGS += -shared
-	# Use older C++ ABI for better compatibility
-	CFLAGS += -D_GLIBCXX_USE_CXX11_ABI=0
-	LLAMA_OPTIONS += -DGGML_OPENMP=OFF -DCMAKE_POSITION_INDEPENDENT_CODE=ON -DCMAKE_CXX_FLAGS="-D_GLIBCXX_USE_CXX11_ABI=0"
-	WHISPER_OPTIONS += -DGGML_OPENMP=OFF -DCMAKE_POSITION_INDEPENDENT_CODE=ON -DCMAKE_CXX_FLAGS="-D_GLIBCXX_USE_CXX11_ABI=0"
-	MINIAUDIO_OPTIONS += -DCMAKE_CXX_FLAGS="-D_GLIBCXX_USE_CXX11_ABI=0"
 	MINIAUDIO_LDFLAGS += -lpthread -lm
+	LLAMA_OPTIONS += -DGGML_OPENMP=OFF -DCMAKE_POSITION_INDEPENDENT_CODE=ON
+	WHISPER_OPTIONS += -DGGML_OPENMP=OFF -DCMAKE_POSITION_INDEPENDENT_CODE=ON
 	STRIP = strip --strip-unneeded $@
 endif