dnl Check for PCSC presence (if required)
dnl On success, HAVE_PCSC is set to 1 and PKG_CONFIG_REQUIRES is filled when
dnl libpcsclite is found using pkg-config

AC_DEFUN([LIBNFC_CHECK_PCSC],
[
  if test "x$pcsc_required" = "xyes"; then
    case "$host" in
      *darwin*)
        AC_MSG_CHECKING(for PC/SC)
        libpcsclite_LIBS="-Wl,-framework,PCSC"
        libpcsclite_CFLAGS="-I/System/Library/Frameworks/PCSC.framework/Headers"
        AC_MSG_RESULT(yes: darwin PC/SC framework)
      ;;
      *)
        PKG_CHECK_MODULES([libpcsclite], [libpcsclite], [HAVE_PCSC=1], [HAVE_PCSC=0])
        if test x"$HAVE_PCSC" = "x0" ; then
          AC_MSG_ERROR([libpcsclite is mandatory.])
        fi
        if test x"$PKG_CONFIG_REQUIRES" != x""; then
          PKG_CONFIG_REQUIRES="$PKG_CONFIG_REQUIRES,"
        fi
        PKG_CONFIG_REQUIRES="$PKG_CONFIG_REQUIRES libpcsclite"
      ;;
    esac
    AC_SUBST(libpcsclite_LIBS)
    AC_SUBST(libpcsclite_CFLAGS)
  fi
])