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• Questions about empty cmake FIND macros

  12 mai 2014, par Ken Li

  I have a macro that looks like this

  MACRO(FFMPEG_FIND varname shortname headername)
  
      MESSAGE(STATUS "FFMPEG_${varname}_LIBRARIES: ${FFMPEG_${varname}_LIBRARIES}")
  
      MESSAGE(STATUS "FFMPEG_${varname}_INCLUDE_DIRS: ${FFMPEG_${varname}_INCLUDE_DIRS}")
  
  ENDMACRO(FFMPEG_FIND)

  which is called like this :

  FFMPEG_FIND(LIBAVFORMAT avformat avformat.h)
  
  FFMPEG_FIND(LIBAVDEVICE avdevice avdevice.h)
  
  FFMPEG_FIND(LIBAVCODEC  avcodec  avcodec.h)
  
  FFMPEG_FIND(LIBAVUTIL   avutil   avutil.h)
  
  FFMPEG_FIND(LIBSWSCALE  swscale  swscale.h)  # not sure about the header to look for here.

  Which will give us the output of

  -- FFMPEG_LIBAVFORMAT_LIBRARIES: F:/Dev/Lib/ffmpeg-20140507-git-4cdea92-win32-de
  
  v/lib/avformat.lib
  
  -- FFMPEG_LIBAVFORMAT_INCLUDE_DIRS: F:/Dev/Lib/ffmpeg-2.2.1
  
  -- FFMPEG_LIBAVDEVICE_LIBRARIES: F:/Dev/Lib/ffmpeg-20140507-git-4cdea92-win32-de
  
  v/lib/avdevice.lib
  
  -- FFMPEG_LIBAVDEVICE_INCLUDE_DIRS: F:/Dev/Lib/ffmpeg-2.2.1
  
  -- FFMPEG_LIBAVCODEC_LIBRARIES: F:/Dev/Lib/ffmpeg-20140507-git-4cdea92-win32-dev
  
  /lib/avcodec.lib
  
  -- FFMPEG_LIBAVCODEC_INCLUDE_DIRS: F:/Dev/Lib/ffmpeg-2.2.1
  
  -- FFMPEG_LIBAVUTIL_LIBRARIES: F:/Dev/Lib/ffmpeg-20140507-git-4cdea92-win32-dev/
  
  lib/avutil.lib
  
  -- FFMPEG_LIBAVUTIL_INCLUDE_DIRS: F:/Dev/Lib/ffmpeg-2.2.1
  
  -- FFMPEG_LIBSWSCALE_LIBRARIES: F:/Dev/Lib/ffmpeg-20140507-git-4cdea92-win32-dev
  
  /lib/swscale.lib
  
  -- FFMPEG_LIBSWSCALE_INCLUDE_DIRS: F:/Dev/Lib/ffmpeg-2.2.1
  
  -- Configuring done
  
  -- Generating done

  My first question is how is cmake even finding the libraries on my hard drive while the FIND macro is essentially empty. The more important question being, why is INCLUDE_DIRS set to F:/Dev/Lib/ffmpeg-2.2.1 which is a path that doesn’t even exist (there is no ffmpeg-2.2.1 folder in F :/Dev/Lib), as it should be pointing to F:/Dev/Lib/ffmpeg-20140507-git-4cdea92-win32-dev/include

• java.lang.UnsatisfiedLinkError couldn't find "libavcore.so"runtime error

  12 décembre 2017, par Shivani Vasundhara

  I am using FFmpegExample and have included pre compiled .so files.There are only 2 CPU structure .so files. "armeabi" and "armeabi-v7a".I already added below code in build.gradle file of app module.It didn’t worked for me.

   ndk {
  
          abiFilters "armeabi","armeabi-v7a"
  
      }

  I am getting this error message :

  

• compile librtmp for android error : cannot find -ldl collect2 : error : ld returned 1 exit status

  6 mai 2014, par hosein

  I have problem on comple librtmp for android using :
  https://github.com/OnlyInAmerica/FFmpeg-Android

  ./build_librtmp_for_android.sh

  /home/user/loc_app/android-ndk-r9d/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.8/../../../../arm-linux-androideabi/bin/ld: error: cannot open crtbegin_so.o: No such file or directory
  
  /home/user/loc_app/android-ndk-r9d/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.8/../../../../arm-linux-androideabi/bin/ld: error: cannot open crtend_so.o: No such file or directory
  
  /home/user/loc_app/android-ndk-r9d/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.8/../../../../arm-linux-androideabi/bin/ld: error: cannot find -lssl
  
  /home/user/loc_app/android-ndk-r9d/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.8/../../../../arm-linux-androideabi/bin/ld: error: cannot find -lcrypto
  
  /home/user/loc_app/android-ndk-r9d/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.8/../../../../arm-linux-androideabi/bin/ld: error: cannot find -lz
  
  /home/user/loc_app/android-ndk-r9d/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.8/../../../../arm-linux-androideabi/bin/ld: error: cannot find -lc
  
  /home/user/loc_app/android-ndk-r9d/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.8/../../../../arm-linux-androideabi/bin/ld: error: cannot find -ldl
  
  collect2: error: ld returned 1 exit status
  
  make: *** [librtmp.so.1] Error 1

  here is build_librtmp_for_android.sh :

  #!/bin/bash
  
  NDK=/home/user/loc_app/android-ndk-r9
  
  #/home/user/loc_app/android-ndk-r9/platforms/android-19/arch-arm
  
  SYSROOT=$NDK/platforms/android-18/arch-arm
  
  #platforms/android-19/arch-arm/
  
  TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64
  
  #/home/user/loc_app/android-ndk-r9/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64
  
  OPENSSL_DIR=/home/user/libs/openssl-android-master/
  
  # Note: Change the above variables for your system.
  
  function build_one
  
  {
  
      set -e
  
      make clean
  
      ln -s ${SYSROOT}usr/lib/crtbegin_so.o
  
      ln -s ${SYSROOT}usr/lib/crtend_so.o
  
      export XLDFLAGS="$ADDI_LDFLAGS -L${OPENSSL_DIR}libs/armeabi -L${SYSROOT}usr/lib "
  
      export CROSS_COMPILE=$TOOLCHAIN/bin/arm-linux-androideabi-
  
      export XCFLAGS="${ADDI_CFLAGS} -I${OPENSSL_DIR}include -isysroot ${SYSROOT}"
  
      export INC="-I${SYSROOT}"
  
      make prefix=\"${PREFIX}\" OPT= install 
  
  }
  
  CPU=arm
  
  PREFIX=$(pwd)/android/$CPU 
  
  ADDI_CFLAGS="-marm"
  
  build_one

  OS : Fedora 64bit

  EDIT 1 : that seems to Makefile so i added it here

  VERSION=v2.4
  
  
  
  prefix=/usr/local
  
  
  
  incdir=$(prefix)/include/librtmp
  
  bindir=$(prefix)/bin
  
  libdir=$(prefix)/lib
  
  mandir=$(prefix)/man
  
  BINDIR=$(DESTDIR)$(bindir)
  
  INCDIR=$(DESTDIR)$(incdir)
  
  LIBDIR=$(DESTDIR)$(libdir)
  
  MANDIR=$(DESTDIR)$(mandir)
  
  
  
  CC=$(CROSS_COMPILE)gcc
  
  LD=$(CROSS_COMPILE)ld
  
  AR=$(CROSS_COMPILE)ar
  
  
  
  SYS=posix
  
  CRYPTO=OPENSSL
  
  #CRYPTO=GNUTLS
  
  DEF_POLARSSL=-DUSE_POLARSSL
  
  DEF_OPENSSL=-DUSE_OPENSSL
  
  DEF_GNUTLS=-DUSE_GNUTLS
  
  DEF_=-DNO_CRYPTO
  
  REQ_GNUTLS=gnutls,hogweed,nettle
  
  REQ_OPENSSL=libssl,libcrypto
  
  PUB_GNUTLS=-lgmp
  
  LIBZ=-lz
  
  LIBS_posix=
  
  LIBS_darwin=
  
  LIBS_mingw=-lws2_32 -lwinmm -lgdi32
  
  LIB_GNUTLS=-lgnutls -lhogweed -lnettle -lgmp $(LIBZ) 
  
  LIB_OPENSSL=-lssl -lcrypto $(LIBZ)
  
  LIB_POLARSSL=-lpolarssl $(LIBZ)
  
  PRIVATE_LIBS=$(LIBS_$(SYS))
  
  CRYPTO_LIB=$(LIB_$(CRYPTO)) $(PRIVATE_LIBS)
  
  CRYPTO_REQ=$(REQ_$(CRYPTO))
  
  CRYPTO_DEF=$(DEF_$(CRYPTO))
  
  PUBLIC_LIBS=$(PUB_$(CRYPTO))
  
  
  
  SO_VERSION=1
  
  SOX_posix=so
  
  SOX_darwin=dylib
  
  SOX_mingw=dll
  
  SOX=$(SOX_$(SYS))
  
  SO_posix=.$(SOX).$(SO_VERSION)
  
  SO_darwin=.$(SO_VERSION).$(SOX)
  
  SO_mingw=-$(SO_VERSION).$(SOX)
  
  SO_EXT=$(SO_$(SYS))
  
  
  
  SODIR_posix=$(LIBDIR)
  
  SODIR_darwin=$(LIBDIR)
  
  SODIR_mingw=$(BINDIR)
  
  SODIR=$(SODIR_$(SYS))
  
  
  
  SO_LDFLAGS_posix=-shared -Wl,-soname,$@
  
  SO_LDFLAGS_darwin=-dynamiclib -twolevel_namespace -undefined dynamic_lookup \
  
      -fno-common -headerpad_max_install_names -install_name $(libdir)/$@
  
  SO_LDFLAGS_mingw=-shared -Wl,--out-implib,librtmp.dll.a
  
  SO_LDFLAGS=$(SO_LDFLAGS_$(SYS))
  
  
  
  INSTALL_IMPLIB_posix=
  
  INSTALL_IMPLIB_darwin=
  
  INSTALL_IMPLIB_mingw=cp librtmp.dll.a $(LIBDIR)
  
  INSTALL_IMPLIB=$(INSTALL_IMPLIB_$(SYS))
  
  
  
  SHARED=yes
  
  SODEF_yes=-fPIC
  
  SOLIB_yes=librtmp$(SO_EXT)
  
  SOINST_yes=install_so
  
  SO_DEF=$(SODEF_$(SHARED))
  
  SO_LIB=$(SOLIB_$(SHARED))
  
  SO_INST=$(SOINST_$(SHARED))
  
  
  
  DEF=-DRTMPDUMP_VERSION=\"$(VERSION)\" $(CRYPTO_DEF) $(XDEF)
  
  OPT=-O2
  
  CFLAGS=-Wall $(XCFLAGS) $(INC) $(DEF) $(OPT) $(SO_DEF) 
  
  LDFLAGS=$(XLDFLAGS)
  
  
  
  
  
  OBJS=rtmp.o log.o amf.o hashswf.o parseurl.o
  
  
  
  all:    librtmp.a $(SO_LIB)
  
  
  
  clean:
  
      rm -f *.o *.a *.$(SOX) *$(SO_EXT) librtmp.pc
  
  
  
  librtmp.a: $(OBJS)
  
      $(AR) rs $@ $?
  
  
  
  librtmp$(SO_EXT): $(OBJS)
  
      $(CC) $(SO_LDFLAGS) $(LDFLAGS) -o $@ $^ $> $(CRYPTO_LIB)
  
      ln -sf $@ librtmp.$(SOX)
  
  
  
  log.o: log.c log.h Makefile
  
  rtmp.o: rtmp.c rtmp.h rtmp_sys.h handshake.h dh.h log.h amf.h Makefile
  
  amf.o: amf.c amf.h bytes.h log.h Makefile
  
  hashswf.o: hashswf.c http.h rtmp.h rtmp_sys.h Makefile
  
  parseurl.o: parseurl.c rtmp.h rtmp_sys.h log.h Makefile
  
  
  
  librtmp.pc: librtmp.pc.in Makefile
  
      sed -e "s;@prefix@;$(prefix);" -e "s;@libdir@;$(libdir);" \
  
          -e "s;@VERSION@;$(VERSION);" \
  
          -e "s;@CRYPTO_REQ@;$(CRYPTO_REQ);" \
  
          -e "s;@PUBLIC_LIBS@;$(PUBLIC_LIBS);" \
  
          -e "s;@PRIVATE_LIBS@;$(PRIVATE_LIBS);" librtmp.pc.in > $@
  
  
  
  install:    install_base $(SO_INST)
  
  
  
  install_base:   librtmp.a librtmp.pc
  
      -mkdir -p $(INCDIR) $(LIBDIR)/pkgconfig $(MANDIR)/man3 $(SODIR)
  
      cp amf.h http.h log.h rtmp.h $(INCDIR)
  
      cp librtmp.a $(LIBDIR)
  
      cp librtmp.pc $(LIBDIR)/pkgconfig
  
      cp librtmp.3 $(MANDIR)/man3
  
  
  
  install_so: librtmp$(SO_EXT)
  
      cp librtmp$(SO_EXT) $(SODIR)
  
      $(INSTALL_IMPLIB)
  
      cd $(SODIR); ln -sf librtmp$(SO_EXT) librtmp.$(SOX)