Using Neon and OpenCV 1.1 library

MarcoDiVivo87 — Thu, 10 Mar 2011 14:55:43 GMT

Hi !

I'm trying to use Neon on OpenCV 1.1 (not 2.1) library...i added the flag: ' -mfpu=neon ' but i get this error :

my_fobj.cpp:1: error: invalid floating point option: -mfpu=neon

I'm trying to accelerate the find_obj.cpp ...this is my incomplete command line(missing all other library used) :

arm-none-linux-gnueabi-g++ -ggdb -ftree-vectorize -ffast-math -mfpu=neon `pkg-config --cflags opencv` -o `basename $1 .cpp` $1 -L$prefix ...(all other libraries..)

Can anyone help me ? Am I on a wrong way ??

Thanks to everybody!

Re: Using Neon and OpenCV 1.1 library

udragon — Thu, 10 Mar 2011 15:13:41 GMT

Are you using GCC 4.4.4 ?

Re: Using Neon and OpenCV 1.1 library

MarcoDiVivo87 — Thu, 10 Mar 2011 15:33:29 GMT

no... i m using gcc 4.1.2...

/opt/freescale/usr/local/gcc-4.1.2-glibc-2.5-nptl-3/arm-none-linux-gnueabi

Re: Using Neon and OpenCV 1.1 library

MarcoDiVivo87 — Thu, 10 Mar 2011 16:32:51 GMT

i saw the ./config --help ...searching for some flag that enable the neon intrinsic... and this is the result :

Installation directories:
--prefix=PREFIX         install architecture-independent files in PREFIX
            [/usr/local]
--exec-prefix=EPREFIX   install architecture-dependent files in EPREFIX
            [PREFIX]

By default, `make install' will install all the files in
`/usr/local/bin', `/usr/local/lib' etc. You can specify
an installation prefix other than `/usr/local' using `--prefix',
for instance `--prefix=$HOME'.

For better control, use the options below.

Fine tuning of the installation directories:
--bindir=DIR           user executables [EPREFIX/bin]
--sbindir=DIR          system admin executables [EPREFIX/sbin]
--libexecdir=DIR       program executables [EPREFIX/libexec]
--sysconfdir=DIR       read-only single-machine data [PREFIX/etc]
--sharedstatedir=DIR   modifiable architecture-independent data [PREFIX/com]
--localstatedir=DIR    modifiable single-machine data [PREFIX/var]
--libdir=DIR           object code libraries [EPREFIX/lib]
--includedir=DIR       C header files [PREFIX/include]
--oldincludedir=DIR    C header files for non-gcc [/usr/include]
--datarootdir=DIR      read-only arch.-independent data root [PREFIX/share]
--datadir=DIR          read-only architecture-independent data [DATAROOTDIR]
--infodir=DIR          info documentation [DATAROOTDIR/info]
--localedir=DIR        locale-dependent data [DATAROOTDIR/locale]
--mandir=DIR           man documentation [DATAROOTDIR/man]
--docdir=DIR           documentation root [DATAROOTDIR/doc/opencv]
--htmldir=DIR          html documentation [DOCDIR]
--dvidir=DIR           dvi documentation [DOCDIR]
--pdfdir=DIR           pdf documentation [DOCDIR]
--psdir=DIR            ps documentation [DOCDIR]

Program names:
--program-prefix=PREFIX            prepend PREFIX to installed program names
--program-suffix=SUFFIX            append SUFFIX to installed program names
--program-transform-name=PROGRAM   run sed PROGRAM on installed program names

System types:
--build=BUILD     configure for building on BUILD [guessed]
--host=HOST       cross-compile to build programs to run on HOST [BUILD]
--target=TARGET   configure for building compilers for TARGET [HOST]

Optional Features:
--disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
--enable-FEATURE[=ARG] include FEATURE [ARG=yes]
--enable-static[=PKGS] build static libraries [default=no]
--disable-dependency-tracking speeds up one-time build
--enable-dependency-tracking   do not reject slow dependency extractors
--enable-shared[=PKGS] build shared libraries [default=yes]
--enable-fast-install[=PKGS]
                          optimize for fast installation [default=yes]
--disable-libtool-lock avoid locking (might break parallel builds)
--enable-debug          build debug version without optimization [no]
--enable-apps           build demo applications [yes]
--enable-sse2           enable SSE2 intrinsics [yes]
--enable-openmp         enable OpenMP threading [automatic]

Optional Packages:
--with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
--without-PACKAGE       do not use PACKAGE (same as --with-PACKAGE=no)
--with-gnu-ld           assume the C compiler uses GNU ld [default=no]
--with-pic              try to use only PIC/non-PIC objects [default=use
                          both]
--with-tags[=TAGS]      include additional configurations [automatic]
--with-swig             use swig wrapper generator [no]
--with-python           use python for wrapping [yes]
--with-octave           use octave for wrapping [no]
--with-xine             use xine libraries (see LICENSE) [no]
--with-gstreamer        use gstreamer multimedia framework (see LICENSE)
                          [no]
--with-ffmpeg           use ffmpeg libraries (see LICENSE) [automatic]
--with-1394libs         use libraw1394/libdc1394 [automatic]
--with-v4l              use video4linux [automatic]
--with-unicap           use unicap (see LICENSE) [no]
--with-imageio          use ImageIO libraries [automatic]
--with-quicktime        use QuickTime libraries [automatic]
--with-carbon           use Carbon windows [automatic]
--with-gtk              use gtk+ 2.0 windows [automatic]
--with-gthread          use gthread in addition to gtk+ [automatic]

Some influential environment variables:
CXX         C++ compiler command
CXXFLAGS    C++ compiler flags
LDFLAGS     linker flags, e.g. -L<lib dir> if you have libraries in a
              nonstandard directory <lib dir>
LIBS        libraries to pass to the linker, e.g. -l<library>
CPPFLAGS    C/C++/Objective C preprocessor flags, e.g. -I<include dir> if
              you have headers in a nonstandard directory <include dir>
CC          C compiler command
CFLAGS      C compiler flags
CPP         C preprocessor
CXXCPP      C++ preprocessor
F77         Fortran 77 compiler command
FFLAGS      Fortran 77 compiler flags
PYTHON      Python Executable Path
SWIG        Simplified Wrapper and Interface Generator, used for Python
              bindings

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