Davide Gerhard a1c16a67ef
cmake: new build tool
this step unify the builing system for all platforms (windows, linux,
osx and *BSD)

* Requirements:

  - gcc/clang (C/C++ compiler) (in debian build-essential)
  - cmake (in debian cmake)
  - git if you build from source (in debian git)
  - posix threads

** Requirements on *BSD/macOS:

  - portaudio

** Optional Requirements:

  - gpsd (in debian libgps-dev)
  - libhamlib (in debian libhamlib-dev)

** Optional Requirements in Linux

  - udev (in debian libudev-dev)
  - alsa (in debian libasound2-dev)

* Main changes:

  - version is now set only on CMakeLists.txt and automatically used
    on the code
  - cpu flags are auto-discovered in the default build and it works
    on gcc/clang/msvc on x86/x86_64/arm; you can force cpu flags with
    -DFORCE_SSE=1 for example (see CMakeLists.txt on root)
  - use a more "complex" tag on generic.conf to facilitate parsing
    by cmake (not more platform dependent). Now it is %C% or %R% for
    example
  - target `tocalls-symbols` is now called `data-update`
  - created debian/ directory to contains files to use debuild

* Example to build:

mkdir build && cd build
cmake ..
make
make install
make install-conf

then you have the binary files on src/ and in the system directory

* CMake options (see the head of CMakeLists.txt)

  - FORCE_SSE force sse instruction
  - FORCE_SSSE3 force ssse3 instruction
  - FORCE_SSE41 force ssse4.1 instruction
  - OPTIONAL_TEST compile optional test (might be broken)
  - BUILD_TESTING enable tests (ctest framework)
  - CMAKE_INSTALL_PREFIX if you want to change your install path
    prefix

for example:

  cmake .. -DOPTIONAL_TEST=ON
2019-11-09 08:26:33 +01:00

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Files in this directory fill in the gaps missing for some operating systems.
--------------------------------------
These are part of the standard C library for Linux, BSD Unix, and similar operating systems.
They are not present for MS Windows so we need to supply our own copy.
From http://ftp.netbsd.org/pub/pkgsrc/current/pkgsrc/net/tnftp/files/libnetbsd/strsep.c
and other BSD locations.
strsep.c
strcasestr.c
strtok_r.c
--------------------------------------
These are needed for the Linux and Windows versions.
They should be part of the standard C library for OpenBSD, FreeBSD, Mac OS X.
http://ftp.netbsd.org/pub/pkgsrc/current/pkgsrc/net/tnftp/files/libnetbsd/strlcpy.c
http://ftp.netbsd.org/pub/pkgsrc/current/pkgsrc/net/tnftp/files/libnetbsd/strlcat.c
strlcpy.c
strlcat.c