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Sur d’autres sites (7260)

  • no c compiler found libx264 build [closed]

    24 août 2012, par kerim yucel

    I have been trying to build ffmpeg for Android and I have managed to do so by using roman10's tutorial.

    However, I needed x264 and I enabled libx264 in the configurations but it wasn't able to find the library. A quick internet search led me to the answer that I have to build x264 seperately and include it to ffmpeg config by editing ExternalLibs flags.

    Currently I am using this script to build x264. Everything is fine except the fact that the error saying "No working C compiler is found" pops up. I have updated and installed build-essential and my gcc version is up to date.

    Any help will be appreciated. Thanks a lot.

    P.S. I am using ndk 4 just to make everything compatible with the tutorial link given above. I am running Ubuntu with VirtualBox from Windows 7.

    Edit : I have been trying this tutorial as well, I am getting the same error along with unknown options error for each configuration options.

    Another edit :
    I have tried this code and obtained the following.

    echo 'int main() return 0 ;' > main.c && arm-eabi-gcc main.c || echo $ ?

    /home/mehmet/Android_NDK_r4/build/prebuilt/linux-x86/arm-eabi-4.4.0/bin/../lib/gcc/arm-eabi/4.4.0/../../../../arm-eabi/bin/ld : crt0.o : No such file : No such file or directory collect2 : ld returned
    1 exit status 1

    I have checked the flags as well, flags seem ok or I can't see the faulty line. Above you may find the build script I am using.

    export ARM_ROOT=/home/mehmet/Android_NDK_r4
    export ARM_INC=$ARM_ROOT/build/platforms/android-8/arch-arm/usr/include/
    export ARM_LIB=$ARM_ROOT/build/platforms/android-8/arch-arm/usr/lib/
    export ARM_TOOL=$ARM_ROOT/build/prebuilt/linux-x86/arm-eabi-4.4.0
    export ARM_LIBO=$ARM_TOOL/lib/gcc/arm-eabi/4.4.0
    export PATH=$ARM_TOOL/bin:$PATH
    export PATH=$ARM_TOOL/arm-eabi/bin:$PATH
    export ARM_PRE=arm-eabi
    ./configure --prefix=/sdcard/arm_and \
    --disable-gpac \
    --extra-cflags=" -I$ARM_INC -fPIC -DANDROID -fpic -mthumb-interwork -ffunction-sections -funwind-tables -fstack-prote
    ctor -fno-short-enums -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ -Wno-psabi -march=armv5te -mtu
    ne=xscale -msoft-float -mthumb -Os -fomit-frame-pointer -fno-strict-aliasing -finline-limit=64 -DANDROID -Wa,--noexecstack -
    MMD -MP " \
    --extra-ldflags=" -nostdlib -Bdynamic -Wl,--no-undefined -Wl,-z,noexecstack -Wl,-z,nocopyreloc -Wl,-soname,/system
    /lib/libz.so -Wl,-rpath-link=$ARM_LIB,-dynamic-linker=/system/bin/linker -L$ARM_LIB -nostdlib $ARM_LIB/crtbegin_dynamic.o $ARM_LIB/crtend_android.o -lc -lm -ldl -lgcc " \
    --cross-prefix=${ARM_PRE}- \
    --disable-asm\
    --host=arm-linux \

    Third edit :

    Config.log gives the following.

    x264 configure script
    Command line options: "--prefix=/sdcard/arm_and" "--disable-gpac" "--extra-cflags=" "-I/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/include/" "-fPIC" "-DANDROID" "-fpic" "-mthumb-interwork" "-ffunction-sections" "-funwind-tables" "-fstack-prote" "ctor" "-fno-short-enums" "-D__ARM_ARCH_5__" "-D__ARM_ARCH_5T__" "-D__ARM_ARCH_5E__" "-D__ARM_ARCH_5TE__" "-Wno-psabi" "-march=armv5te" "-mtu" "ne=xscale" "-msoft-float" "-mthumb" "-Os" "-fomit-frame-pointer" "-fno-strict-aliasing" "-finline-limit=64" "-DANDROID" "-Wa,--noexecstack" "-" "MMD" "-MP" "--extra-ldflags=" "-nostdlib" "-Bdynamic" "-Wl,--no-undefined" "-Wl,-z,noexecstack" "-Wl,-z,nocopyreloc" "-Wl,-soname,/system" "/lib/libz.so" "-Wl,-rpath-link=/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib/,-dynamic-linker=/system/bin/linker" "-L/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib/" "-nostdlib" "/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib//crtbegin_dynamic.o" "/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib//crtend_android.o" "-lc" "-lm" "-ldl" "-lgcc" "--cross-prefix=arm-eabi-" "--disable-asm" "--host=arm-linux"

       checking whether arm-eabi-gcc works... no
       Failed commandline was:
       --------------------------------------------------
       arm-eabi-gcc conftest.c -Wall -I. -I$(SRCPATH) -I/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/include/ -fPIC -DANDROID -fpic -mthumb-interwork -ffunction-sections -funwind-tables -fstack-prote
       ctor -fno-short-enums -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ -Wno-psabi -march=armv5te -mtu
       ne=xscale -msoft-float -mthumb -Os -fomit-frame-pointer -fno-strict-aliasing -finline-limit=64 -DANDROID -Wa,--noexecstack -
       MMD -MP -nostdlib -Bdynamic -Wl,--no-undefined -Wl,-z,noexecstack -Wl,-z,nocopyreloc -Wl,-soname,/system
       /lib/libz.so -Wl,-rpath-link=/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib/,-dynamic-linker=/system/bin/linker -L/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib/ -nostdlib /home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib//crtbegin_dynamic.o /home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib//crtend_android.o -lc -lm -ldl -lgcc -lm -o conftest
       arm-eabi-gcc: ctor: No such file or directory
       arm-eabi-gcc: ne=xscale: No such file or directory
       arm-eabi-gcc: MMD: No such file or directory
       arm-eabi-gcc: /lib/libz.so: No such file or directory
       cc1: error: unrecognized command line option "-mtu"
       cc1: error: unrecognized command line option "-fstack-prote"
       cc1: error: to generate dependencies you must specify either -M or -MM
       arm-eabi-gcc: -E or -x required when input is from standard input
       --------------------------------------------------
       Failed program was:
       --------------------------------------------------
       int main () { return 0; }
       --------------------------------------------------
       DIED: No working C compiler found.

    Last edit
    Problem solved. It was just a mistake related to typos. It works well now.

  • no c compiler found libx264 build [closed]

    24 août 2012, par kerim yucel

    I have been trying to build ffmpeg for Android and I have managed to do so by using roman10's tutorial.

    However, I needed x264 and I enabled libx264 in the configurations but it wasn't able to find the library. A quick internet search led me to the answer that I have to build x264 seperately and include it to ffmpeg config by editing ExternalLibs flags.

    Currently I am using this script to build x264. Everything is fine except the fact that the error saying "No working C compiler is found" pops up. I have updated and installed build-essential and my gcc version is up to date.

    Any help will be appreciated. Thanks a lot.

    P.S. I am using ndk 4 just to make everything compatible with the tutorial link given above. I am running Ubuntu with VirtualBox from Windows 7.

    Edit : I have been trying this tutorial as well, I am getting the same error along with unknown options error for each configuration options.

    Another edit :
    I have tried this code and obtained the following.

    echo 'int main() return 0 ;' > main.c && arm-eabi-gcc main.c || echo $ ?

    /home/mehmet/Android_NDK_r4/build/prebuilt/linux-x86/arm-eabi-4.4.0/bin/../lib/gcc/arm-eabi/4.4.0/../../../../arm-eabi/bin/ld : crt0.o : No such file : No such file or directory collect2 : ld returned
    1 exit status 1

    I have checked the flags as well, flags seem ok or I can't see the faulty line. Above you may find the build script I am using.

    export ARM_ROOT=/home/mehmet/Android_NDK_r4
    export ARM_INC=$ARM_ROOT/build/platforms/android-8/arch-arm/usr/include/
    export ARM_LIB=$ARM_ROOT/build/platforms/android-8/arch-arm/usr/lib/
    export ARM_TOOL=$ARM_ROOT/build/prebuilt/linux-x86/arm-eabi-4.4.0
    export ARM_LIBO=$ARM_TOOL/lib/gcc/arm-eabi/4.4.0
    export PATH=$ARM_TOOL/bin:$PATH
    export PATH=$ARM_TOOL/arm-eabi/bin:$PATH
    export ARM_PRE=arm-eabi
    ./configure --prefix=/sdcard/arm_and \
    --disable-gpac \
    --extra-cflags=" -I$ARM_INC -fPIC -DANDROID -fpic -mthumb-interwork -ffunction-sections -funwind-tables -fstack-prote
    ctor -fno-short-enums -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ -Wno-psabi -march=armv5te -mtu
    ne=xscale -msoft-float -mthumb -Os -fomit-frame-pointer -fno-strict-aliasing -finline-limit=64 -DANDROID -Wa,--noexecstack -
    MMD -MP " \
    --extra-ldflags=" -nostdlib -Bdynamic -Wl,--no-undefined -Wl,-z,noexecstack -Wl,-z,nocopyreloc -Wl,-soname,/system
    /lib/libz.so -Wl,-rpath-link=$ARM_LIB,-dynamic-linker=/system/bin/linker -L$ARM_LIB -nostdlib $ARM_LIB/crtbegin_dynamic.o $ARM_LIB/crtend_android.o -lc -lm -ldl -lgcc " \
    --cross-prefix=${ARM_PRE}- \
    --disable-asm\
    --host=arm-linux \

    Third edit :

    Config.log gives the following.

    x264 configure script
    Command line options: "--prefix=/sdcard/arm_and" "--disable-gpac" "--extra-cflags=" "-I/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/include/" "-fPIC" "-DANDROID" "-fpic" "-mthumb-interwork" "-ffunction-sections" "-funwind-tables" "-fstack-prote" "ctor" "-fno-short-enums" "-D__ARM_ARCH_5__" "-D__ARM_ARCH_5T__" "-D__ARM_ARCH_5E__" "-D__ARM_ARCH_5TE__" "-Wno-psabi" "-march=armv5te" "-mtu" "ne=xscale" "-msoft-float" "-mthumb" "-Os" "-fomit-frame-pointer" "-fno-strict-aliasing" "-finline-limit=64" "-DANDROID" "-Wa,--noexecstack" "-" "MMD" "-MP" "--extra-ldflags=" "-nostdlib" "-Bdynamic" "-Wl,--no-undefined" "-Wl,-z,noexecstack" "-Wl,-z,nocopyreloc" "-Wl,-soname,/system" "/lib/libz.so" "-Wl,-rpath-link=/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib/,-dynamic-linker=/system/bin/linker" "-L/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib/" "-nostdlib" "/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib//crtbegin_dynamic.o" "/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib//crtend_android.o" "-lc" "-lm" "-ldl" "-lgcc" "--cross-prefix=arm-eabi-" "--disable-asm" "--host=arm-linux"

       checking whether arm-eabi-gcc works... no
       Failed commandline was:
       --------------------------------------------------
       arm-eabi-gcc conftest.c -Wall -I. -I$(SRCPATH) -I/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/include/ -fPIC -DANDROID -fpic -mthumb-interwork -ffunction-sections -funwind-tables -fstack-prote
       ctor -fno-short-enums -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ -Wno-psabi -march=armv5te -mtu
       ne=xscale -msoft-float -mthumb -Os -fomit-frame-pointer -fno-strict-aliasing -finline-limit=64 -DANDROID -Wa,--noexecstack -
       MMD -MP -nostdlib -Bdynamic -Wl,--no-undefined -Wl,-z,noexecstack -Wl,-z,nocopyreloc -Wl,-soname,/system
       /lib/libz.so -Wl,-rpath-link=/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib/,-dynamic-linker=/system/bin/linker -L/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib/ -nostdlib /home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib//crtbegin_dynamic.o /home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib//crtend_android.o -lc -lm -ldl -lgcc -lm -o conftest
       arm-eabi-gcc: ctor: No such file or directory
       arm-eabi-gcc: ne=xscale: No such file or directory
       arm-eabi-gcc: MMD: No such file or directory
       arm-eabi-gcc: /lib/libz.so: No such file or directory
       cc1: error: unrecognized command line option "-mtu"
       cc1: error: unrecognized command line option "-fstack-prote"
       cc1: error: to generate dependencies you must specify either -M or -MM
       arm-eabi-gcc: -E or -x required when input is from standard input
       --------------------------------------------------
       Failed program was:
       --------------------------------------------------
       int main () { return 0; }
       --------------------------------------------------
       DIED: No working C compiler found.

    Last edit
    Problem solved. It was just a mistake related to typos. It works well now.

  • android ffmpeg compilation error

    28 août 2012, par swapnil adsure

    hey guys i am going to share my script and error please help me to solve it
    i want to compile ffmpeg on android

    '# !/bin/bash
    # Author : Dmitry Dzakhov (based on Guo Mingyu's script)

    # Creating conf.sh in ffmpeg directory
    NDK=~/android-ndk
    PLATFORM=$NDK/platforms/android-14/arch-arm
    PREBUILT=$NDK/toolchains/arm-linux-androideabi-4.4.3/prebuilt/darwin-x86
    output="conf.sh"

    [ -f conf.sh ] && echo "Old $output has been removed."
    echo '#!/bin/bash' > $output
    echo "PREBUILT=$PREBUILT" >> $output
    echo "PLATFORM=$PLATFORM" >> $output
    echo './configure --target-os=linux \
       --prefix=./android/armv7-a \
       --enable-cross-compile \
       --extra-libs="-lgcc" \
       --arch=arm \
       --cc=$PREBUILT/bin/arm-linux-androideabi-gcc \
       --cross-prefix=$PREBUILT/bin/arm-linux-androideabi- \
       --nm=$PREBUILT/bin/arm-linux-androideabi-nm \
       --sysroot=$PLATFORM \
       --extra-cflags=" -O3 -fpic -DANDROID -DHAVE_SYS_UIO_H=1 -Dipv6mr_interface=ipv6mr_ifindex -fasm -Wno-psabi -fno-short-enums -fno-strict-aliasing -finline-limit=300 -mfloat-abi=softfp -mfpu=neon -marm -march=armv7-a -mtune=cortex-a8 " \
       --disable-shared \
       --enable-static \
       --extra-ldflags="-Wl,-rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -nostdlib -lc -lm -ldl -llog" \
       --enable-parsers \
       --enable-encoders \
       --enable-decoders \
       --enable-muxers \
       --enable-demuxers \
       --enable-swscale \
       --enable-swscale-alpha \
       --disable-ffplay \
       --disable-ffprobe \
       --enable-ffserver \
       --enable-network \
       --enable-indevs \
       --disable-bsfs \
       --enable-filters \
       --enable-avfilter \
       --enable-protocols \
       --disable-asm \
       --enable-neon' >> $output

    # start configure
    sudo chmod +x $output
    echo "configuring..."
    ./$output || (echo configure failed && exit 1)

    # modify the config.h
    echo "modifying the config.h..."
    sed -i "s/#define restrict restrict/#define restrict/g" config.h

    # remove static functions in libavutil/libm.h
    echo "removing static functions in libavutil/libm.h..."
    sed -i "/static/,/}/d" libavutil/libm.h

    # modify Makefiles
    echo "modifying Makefiles..."
    sed -i "/include \$(SUBDIR)..\/subdir.mak/d" libavcodec/Makefile
    sed -i "/include \$(SUBDIR)..\/config.mak/d" libavcodec/Makefile
    sed -i "/include \$(SUBDIR)..\/subdir.mak/d" libavfilter/Makefile
    sed -i "/include \$(SUBDIR)..\/config.mak/d" libavfilter/Makefile
    sed -i "/include \$(SUBDIR)..\/subdir.mak/d" libavformat/Makefile
    sed -i "/include \$(SUBDIR)..\/config.mak/d" libavformat/Makefile
    sed -i "/include \$(SUBDIR)..\/subdir.mak/d" libavutil/Makefile
    sed -i "/include \$(SUBDIR)..\/config.mak/d" libavutil/Makefile
    sed -i "/include \$(SUBDIR)..\/subdir.mak/d" libpostproc/Makefile
    sed -i "/include \$(SUBDIR)..\/config.mak/d" libpostproc/Makefile
    sed -i "/include \$(SUBDIR)..\/subdir.mak/d" libswscale/Makefile
    sed -i "/include \$(SUBDIR)..\/config.mak/d" libswscale/Makefile

    # generate av.mk in ffmpeg
    echo "generating av.mk in ffmpeg..."
    echo '# LOCAL_PATH is one of libavutil, libavcodec, libavformat, or libswscale

    #include $(LOCAL_PATH)/../config-$(TARGET_ARCH).mak
    include $(LOCAL_PATH)/../config.mak

    OBJS :=
    OBJS-yes :=
    MMX-OBJS-yes :=
    include $(LOCAL_PATH)/Makefile

    # collect objects
    OBJS-$(HAVE_MMX) += $(MMX-OBJS-yes)
    OBJS += $(OBJS-yes)

    FFNAME := lib$(NAME)
    FFLIBS := $(foreach,NAME,$(FFLIBS),lib$(NAME))
    FFCFLAGS  = -DHAVE_AV_CONFIG_H -Wno-sign-compare -Wno-switch -Wno-pointer-sign
    FFCFLAGS += -DTARGET_CONFIG=\"config-$(TARGET_ARCH).h\"

    ALL_S_FILES := $(wildcard $(LOCAL_PATH)/$(TARGET_ARCH)/*.S)
    ALL_S_FILES := $(addprefix $(TARGET_ARCH)/, $(notdir $(ALL_S_FILES)))

    ifneq ($(ALL_S_FILES),)
    ALL_S_OBJS := $(patsubst %.S,%.o,$(ALL_S_FILES))
    C_OBJS := $(filter-out $(ALL_S_OBJS),$(OBJS))
    S_OBJS := $(filter $(ALL_S_OBJS),$(OBJS))
    else
    C_OBJS := $(OBJS)
    S_OBJS :=
    endif

    C_FILES := $(patsubst %.o,%.c,$(C_OBJS))
    S_FILES := $(patsubst %.o,%.S,$(S_OBJS))

    FFFILES := $(sort $(S_FILES)) $(sort $(C_FILES))' > av.mk

    echo 'include $(all-subdir-makefiles)' > ../Android.mk

    echo 'LOCAL_PATH := $(call my-dir)
    include $(CLEAR_VARS)
    LOCAL_STATIC_LIBRARIES := libavformat libavcodec libavutil libpostproc libswscale
    LOCAL_MODULE := ffmpeg
    include $(BUILD_SHARED_LIBRARY)
    include $(call all-makefiles-under,$(LOCAL_PATH))' > Android.mk

    echo 'LOCAL_PATH := $(call my-dir)
    include $(CLEAR_VARS)
    include $(LOCAL_PATH)/../av.mk
    LOCAL_SRC_FILES := $(FFFILES)
    LOCAL_C_INCLUDES :=        \
       $(LOCAL_PATH)        \
       $(LOCAL_PATH)/..
    LOCAL_CFLAGS += $(FFCFLAGS)
    LOCAL_CFLAGS += -include "string.h" -Dipv6mr_interface=ipv6mr_ifindex
    LOCAL_LDLIBS := -lz
    LOCAL_STATIC_LIBRARIES := $(FFLIBS)
    LOCAL_MODULE := $(FFNAME)
    include $(BUILD_STATIC_LIBRARY)' > libavformat/Android.mk

    echo 'LOCAL_PATH := $(call my-dir)
    include $(CLEAR_VARS)
    include $(LOCAL_PATH)/../av.mk
    LOCAL_SRC_FILES := $(FFFILES)
    LOCAL_C_INCLUDES :=        \
       $(LOCAL_PATH)        \
       $(LOCAL_PATH)/..
    LOCAL_CFLAGS += $(FFCFLAGS)
    LOCAL_CFLAGS += -std=c99
    LOCAL_LDLIBS := -lz
    LOCAL_STATIC_LIBRARIES := $(FFLIBS)
    LOCAL_MODULE := $(FFNAME)
    include $(BUILD_STATIC_LIBRARY)' > libavcodec/Android.mk

    echo 'LOCAL_PATH := $(call my-dir)
    include $(CLEAR_VARS)
    include $(LOCAL_PATH)/../av.mk
    LOCAL_SRC_FILES := $(FFFILES)
    LOCAL_C_INCLUDES :=        \
       $(LOCAL_PATH)        \
       $(LOCAL_PATH)/..
    LOCAL_CFLAGS += $(FFCFLAGS)
    LOCAL_STATIC_LIBRARIES := $(FFLIBS)
    LOCAL_MODULE := $(FFNAME)
    include $(BUILD_STATIC_LIBRARY)' > libavfilter/Android.mk

    echo 'LOCAL_PATH := $(call my-dir)
    include $(CLEAR_VARS)
    include $(LOCAL_PATH)/../av.mk
    LOCAL_SRC_FILES := $(FFFILES)
    LOCAL_C_INCLUDES :=        \
       $(LOCAL_PATH)        \
       $(LOCAL_PATH)/..
    LOCAL_CFLAGS += $(FFCFLAGS)
    LOCAL_STATIC_LIBRARIES := $(FFLIBS)
    LOCAL_MODULE := $(FFNAME)
    include $(BUILD_STATIC_LIBRARY)' > libavutil/Android.mk

    echo 'LOCAL_PATH := $(call my-dir)
    include $(CLEAR_VARS)
    include $(LOCAL_PATH)/../av.mk
    LOCAL_SRC_FILES := $(FFFILES)
    LOCAL_C_INCLUDES :=        \
       $(LOCAL_PATH)        \
       $(LOCAL_PATH)/..
    LOCAL_CFLAGS += $(FFCFLAGS)
    LOCAL_STATIC_LIBRARIES := $(FFLIBS)
    LOCAL_MODULE := $(FFNAME)
    include $(BUILD_STATIC_LIBRARY)' > libpostproc/Android.mk

    echo 'LOCAL_PATH := $(call my-dir)
    include $(CLEAR_VARS)
    include $(LOCAL_PATH)/../av.mk
    LOCAL_SRC_FILES := $(FFFILES)
    LOCAL_C_INCLUDES :=        \
       $(LOCAL_PATH)        \
       $(LOCAL_PATH)/..
    LOCAL_CFLAGS += $(FFCFLAGS)
    LOCAL_STATIC_LIBRARIES := $(FFLIBS)
    LOCAL_MODULE := $(FFNAME)
    include $(BUILD_STATIC_LIBRARY)' > libswscale/Android.mk

    # start build!
    echo "start ndk-building..."
    cd ../..
    $NDK/ndk-build
    # Change previous line to "$NDK/ndk-build V=1" if you'll get errors. This will give some more information.'

    and here is the error i got

    WARNING : /Users/swapnil/android-ndk/toolchains/arm-linux-androideabi-4.4.3/prebuilt/darwin-x86/bin/arm-linux-androideabi-pkg-config not found, library detection may fail.
    WARNING : Compiler does not indicate floating-point ABI, guessing soft.
    modifying the config.h