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Sur d’autres sites (8852)
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clang++ : error : linker command failed with exit code 1 (use -v to see invocation) in cpp with ffmpeg
6 avril 2020, par Pradeep Simbaclang++: error: linker command failed with exit code 1 (use -v to see invocation)



I saw this link and link2. But, it not done.



My jni folder :






Android.mk file



LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_C_INCLUDES += ./include
LOCAL_MODULE := native-lib
LOCAL_CFLAGS := -DSTDC_HEADERS -std=c99
LOCAL_CFLAGS := -Wno-pointer-sign
LOCAL_ARM_MODE := arm
APP_OPTIM := release
LOCAL_SRC_FILES := \
./native-lib.cpp
LOCAL_LDLIBS := -llog
include $(BUILD_SHARED_LIBRARY)



native-lib.cpp file



#include 
#include <string>

extern "C"
{
#include "libavcodec/avcodec.h"
#include "libavformat/avformat.h"
#include "libavutil/opt.h"
}

extern "C" JNIEXPORT jstring JNICALL
Java_com_example_m_MainActivity_stringFromJNI(
JNIEnv* env,
jobject /* this */) {
std::string hello = "Hello from C++";
av_register_all();
return env->NewStringUTF(hello.c_str());
}
</string>


When I build ndk this error occurs.



D:\Github\n>ndk-build
Android NDK: APP_PLATFORM not set. Defaulting to minimum supported version android-16.
[arm64-v8a] Compile++ : native-lib <= native-lib.cpp
[arm64-v8a] SharedLibrary : libnative-lib.so
./obj/local/arm64-v8a/objs/native-lib/./libmp3lame/native-lib.o: In function `Java_com_example_m_MainActivity_stringFromJNI':
D:\Github\n/jni/./libmp3lame/native-lib.cpp:16: undefined reference to `av_register_all'
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [D:/install/sdk/ndk/21.0.6113669/build//../build/core/build-binary.mk:725: obj/local/arm64-v8a/libnative-lib.so] Error 1

D:\Github\n>ndk-build -v
GNU Make 4.2.1
Built for x86_64-w64-mingw32
Copyright (C) 1988-2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later /gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

D:\Github\n>



why it comes like this
native-lib.cpp:16: undefined reference av_register_all?


I added all the required libs in my jni folder but, why this error and this
native-lib.cpp:16: undefined reference av_register_allcomes ?
How can I solve this ?

-
clang++ : error : linker command failed with exit code 1 (use -v to see invocation) [duplicate]
1er avril 2020, par Pradeep SimbaWhen I build ndk with ffmpeg it occurs error.






Android.mk file



LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_C_INCLUDES += ./include
LOCAL_MODULE := native-lib
LOCAL_CFLAGS := -DSTDC_HEADERS -std=c99
LOCAL_CFLAGS := -Wno-pointer-sign
LOCAL_ARM_MODE := arm
APP_OPTIM := release
LOCAL_SRC_FILES := \
./native-lib.cpp
LOCAL_LDLIBS := -llog
include $(BUILD_SHARED_LIBRARY)



native-lib.cpp file



#include 
#include <string>

extern "C"
{
#include "libavcodec/avcodec.h"
#include "libavformat/avformat.h"
#include "libavutil/opt.h"
}

extern "C" JNIEXPORT jstring JNICALL
Java_com_example_m_MainActivity_stringFromJNI(
 JNIEnv* env,
 jobject /* this */) {
std::string hello = "Hello from C++";
av_register_all();
return env->NewStringUTF(hello.c_str());
}
</string>


When I build ndk this error occurs.






D:\Github\n>ndk-build
Android NDK: APP_PLATFORM not set. Defaulting to minimum supported version android-16.
[arm64-v8a] Compile++ : native-lib <= native-lib.cpp
[arm64-v8a] SharedLibrary : libnative-lib.so
./obj/local/arm64-v8a/objs/native-lib/./libmp3lame/native-lib.o: In function `Java_com_example_m_MainActivity_stringFromJNI':
D:\Github\n/jni/./libmp3lame/native-lib.cpp:16: undefined reference to `av_register_all'
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [D:/install/sdk/ndk/21.0.6113669/build//../build/core/build-binary.mk:725: obj/local/arm64-v8a/libnative-lib.so] Error 1

D:\Github\n>ndk-build -v
GNU Make 4.2.1
Built for x86_64-w64-mingw32
Copyright (C) 1988-2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later /gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

D:\Github\n>



why it comes like this
native-lib.cpp:16: undefined reference av_register_all?


I added all the required libs in my jni folder . but, why this error and this native-lib.cpp:16 : undefined reference av_register_all comes ?



How can I solve this ?


-
avformat/utils : make av_url_split search for hashmark as well to separate hostname
3 février 2020, par Marton Balintavformat/utils : make av_url_split search for hashmark as well to separate hostname
RFC 3986 states that the generic syntax uses the slash ("/"), question mark
(" ?"), and number sign ("#") characters to delimit components that are
significant to the generic parser's hierarchical interpretation of an
identifier.Signed-off-by : Marton Balint <cus@passwd.hu>
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