Upstream merge

# python binary file should be is exec path.

option( USE_FP_LIB_TABLE "Use the new footprint library table implementation. ( default OFF)" )

option( BUILD_GITHUB_PLUGIN "Build the GITHUB_PLUGIN for pcbnew." OFF )

    check_symbol_exists(strcasecmp "strings.h" HAVE_STRCASECMP)

    check_symbol_exists(strncasecmp "string.h" HAVE_STRNCASECMP)

    check_symbol_exists(strncasecmp "strings.h" HAVE_STRNCASECMP)

    check_symbol_exists( strtok_r "string.h" HAVE_STRTOKR )

    # Some platforms define malloc and free in malloc.h instead of stdlib.h.

    check_symbol_exists(malloc "stdlib.h" MALLOC_IN_STDLIB_H)

    # CMakes check_cxx_symbol_exists() doesn't work for templates so we must create a

    # small program to verify isinf() exists in cmath.

    check_cxx_source_compiles( "#include <cmath>\nusing namespace std;\nint main(int argc, char** argv)\n{\n  (void)argv;\n  isinf(1.0);  (void)argc;\n  return 0;\n}\n"  HAVE_CMATH_ISINF )

    check_cxx_source_compiles( "#include <cmath>\nint main(int argc, char** argv)\n{\n  (void)argv;\n  std::isinf(1.0);  (void)argc;\n  return 0;\n}\n"  HAVE_CMATH_ISINF )

    #check_symbol_exists(clock_gettime "time.h" HAVE_CLOCK_GETTIME) non-standard library, does not work

    check_library_exists(rt clock_gettime "" HAVE_CLOCK_GETTIME)

#cmakedefine HAVE_STRNCASECMP

#cmakedefine HAVE_STRTOKR       // spelled odly to differ from wx's similar test

// Handle platform differences in math.h

#cmakedefine HAVE_MATH_H

/// The legacy file format revision of the *.brd file created by this build

#define LEGACY_BOARD_FILE_VERSION 2

/// Definition to compile with Pcbnew footprint library table implementation.

#cmakedefine USE_FP_LIB_TABLE

/// The install prefix defined in CMAKE_INSTALL_PREFIX.

#define DEFAULT_INSTALL_PATH               "@CMAKE_INSTALL_PREFIX"

    size should the user have selected a font size of 13 points.

Quoting:

    Filenames and paths should be emphasized with <> angle brackets.  Anything

    else should be emphasized with single quotes ''.  e.g.:

    <filename.kicad_pcb>

    <longpath/subdir>

    Filenames, paths or other text should be with single quotes ''.  e.g.:

    'filename.kicad_pcb'

    'longpath/subdir'

    'FOOTPRINTNAME'

    'anything else'

    Often text strings like this end up in panels which use HTML rendering, and this

    can happen in the future.  Previously used angle brackets only cause grief there.

    selcolor.cpp

    string.cpp

    trigo.cpp

    utf8.cpp

    wildcards_and_files_ext.cpp

    worksheet.cpp

    wxwineda.cpp

    zoom.cpp

    )

if( NOT HAVE_STRTOKR )

    set( COMMON_SRCS ${COMMON_SRCS} strtok_r.c )

endif()

enable_language(C CXX ASM)

set_source_files_properties(system/fcontext.s PROPERTIES COMPILE_FLAGS "-x assembler-with-cpp")