在VLC中集成OpenMP

我想讓OpenMP與VLC（Android版本）一起工作，但沒有成功。在VLC中集成OpenMP

所建議的谷歌，我已將此添加到Android.mk（/ VLC-的Android/libvlc/JNI）文件：

LOCAL_CFLAGS += -fopenmp 
LOCAL_LDFLAGS += -fopenmp

但我不斷收到：

error: undefined reference to 'omp_set_num_threads' 
error: undefined reference to 'omp_get_thread_num' 
error: undefined reference to 'omp_get_num_threads'

我不知道是否有人可以幫助我克服這個錯誤。

Android.mk：

LOCAL_PATH := $(call my-dir) 

include $(CLEAR_VARS) 
LOCAL_MODULE := libvlc 
ARCH=$(APP_ABI) 
LOCAL_SRC_FILES += libvlcjni-modules.c libvlcjni-symbols.c dummy.cpp 
LOCAL_LDFLAGS := -L$(VLC_CONTRIB)/lib 
LOCAL_LDLIBS := \ 
    $(VLC_MODULES) \ 
    $(VLC_BUILD_DIR)/lib/.libs/libvlc.a \ 
    $(VLC_BUILD_DIR)/src/.libs/libvlccore.a \ 
    $(VLC_BUILD_DIR)/compat/.libs/libcompat.a \ 
    $(VLC_CONTRIB_LDFLAGS) \ 
    -ldl -lz -lm -llog \ 
    -lliveMedia -lUsageEnvironment -lBasicUsageEnvironment -lgroupsock \ 
    -la52 -ljpeg \ 
    -lavcodec -lebml \ 
    -llua \ 
    -lgcrypt -lgpg-error \ 
    $(VLC_LDFLAGS) 

include $(BUILD_SHARED_LIBRARY) 

include $(CLEAR_VARS) 
LOCAL_MODULE := libvlcjni 

LOCAL_SRC_FILES := libvlcjni.c 
LOCAL_SRC_FILES += libvlcjni-mediaplayer.c 
LOCAL_SRC_FILES += libvlcjni-vlcobject.c 
LOCAL_SRC_FILES += libvlcjni-media.c libvlcjni-medialist.c libvlcjni-mediadiscoverer.c 
LOCAL_SRC_FILES += libvlcjni-dialog.c 
LOCAL_SRC_FILES += thumbnailer.c 
LOCAL_SRC_FILES += std_logger.c 

LOCAL_LDLIBS := -llog 
LOCAL_C_INCLUDES := $(VLC_SRC_DIR)/include 

ARCH=$(APP_ABI) 

LOCAL_CFLAGS := -std=c11 
ifeq ($(ARCH), armeabi-v7a) 
    LOCAL_CFLAGS += -DHAVE_ARMEABI_V7A 
endif 

LOCAL_SHARED_LIBRARIES:= libvlc 

include $(BUILD_SHARED_LIBRARY)

來源

2017-06-12 RonTLV

W hich編譯器（版本）？你在哪個操作系統中編譯？ –

操作系統是Ubuntu 16.04，我將make文件添加到我的文章中。謝謝。 – RonTLV

我在發佈的makefile中看不到'LOCAL_LDFLAGS + = -fopenmp'，與'LOCAL_CFLAGS + = -fopenmp'一樣，只有分配（'：='）比想要的更好？ – purplepsycho

對於未來的用戶，我設法通過增加解決這個問題：

LOCAL_CFLAGS := -std=c99 -fopenmp

和-lgomp到LOCAL_LDLIBS：

LOCAL_LDLIBS := \ 
    $(VLC_MODULES) \ 
    $(VLC_BUILD_DIR)/lib/.libs/libvlc.a \ 
    $(VLC_BUILD_DIR)/src/.libs/libvlccore.a \ 
    $(VLC_BUILD_DIR)/compat/.libs/libcompat.a \ 
    $(VLC_CONTRIB_LDFLAGS) \ 
    -ldl -lz -lm -llog \ 
    -lliveMedia -lUsageEnvironment -lBasicUsageEnvironment -lgroupsock \ 
    -la52 -ljpeg \ 
    -lavcodec -lebml \ 
    -llua -lgomp \ 
    -lgcrypt -lgpg-error \ 
    $(VLC_LDFLAGS)

參考：OpenMP library specification

來源

2017-06-14 10:17:54 RonTLV

在VLC中集成OpenMP

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