Fix builds on FreeBSD

Without this patch the cmake config assume that every UNIX system that
is not APPLE is automatically a linux system. This however causes
problems on FreeBSD and properly on other BSD systems.

We now explicitly check if the CMAKE_SYSTEM_NAME is set to Linux.

CMakeLists.txt

@@ -158,7 +158,7 @@ ENDIF(NOT WIN32)
 
 INCLUDE(LibnfcDrivers)
 
-IF(UNIX AND NOT APPLE)
+IF(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
  IF(I2C_REQUIRED)
  # Inspired from http:https://cmake.3232098.n2.nabble.com/RFC-cmake-analog-to-AC-SEARCH-LIBS-td7585423.html
  INCLUDE (CheckFunctionExists)
@@ -172,7 +172,7 @@ IF(UNIX AND NOT APPLE)
  ENDIF (HAVE_CLOCK_GETTIME_IN_RT)
  ENDIF (NOT HAVE_CLOCK_GETTIME)
  ENDIF(I2C_REQUIRED)
-ENDIF(UNIX AND NOT APPLE)
+ ENDIF(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
 
 IF(PCSC_INCLUDE_DIRS)
  INCLUDE_DIRECTORIES(${PCSC_INCLUDE_DIRS})

cmake/modules/LibnfcDrivers.cmake

@@ -3,13 +3,13 @@ SET(LIBNFC_DRIVER_ACR122_PCSC OFF CACHE BOOL "Enable ACR122 support (Depends on
 SET(LIBNFC_DRIVER_ACR122_USB ON CACHE BOOL "Enable ACR122 support (Direct USB connection)")
 SET(LIBNFC_DRIVER_ACR122S ON CACHE BOOL "Enable ACR122S support (Use serial port)")
 SET(LIBNFC_DRIVER_ARYGON ON CACHE BOOL "Enable ARYGON support (Use serial port)")
-IF(UNIX AND NOT APPLE)
+IF(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
  SET(LIBNFC_DRIVER_PN532_I2C ON CACHE BOOL "Enable PN532 I2C support (Use I2C bus)")
  SET(LIBNFC_DRIVER_PN532_SPI ON CACHE BOOL "Enable PN532 SPI support (Use SPI bus)")
-ELSE(UNIX AND NOT APPLE)
+ELSE(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
  SET(LIBNFC_DRIVER_PN532_I2C OFF CACHE BOOL "Enable PN532 I2C support (Use I2C bus)")
  SET(LIBNFC_DRIVER_PN532_SPI OFF CACHE BOOL "Enable PN532 SPI support (Use SPI bus)")
-ENDIF(UNIX AND NOT APPLE)
+ENDIF(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
 SET(LIBNFC_DRIVER_PN532_UART ON CACHE BOOL "Enable PN532 UART support (Use serial port)")
 SET(LIBNFC_DRIVER_PN53X_USB ON CACHE BOOL "Enable PN531 and PN531 USB support (Depends on libusb)")
 

libnfc/CMakeLists.txt

@@ -29,23 +29,23 @@ IF(UART_REQUIRED)
 ENDIF(UART_REQUIRED)
 
 IF(I2C_REQUIRED)
- IF(UNIX AND NOT APPLE)
+ IF(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
  LIST(APPEND BUSES_SOURCES buses/i2c)
- ELSE(UNIX AND NOT APPLE)
+ ELSE(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
  # Only Linux is supported at the moment
  #LIST(APPEND BUSES_SOURCES ../contrib/win32/libnfc/buses/i2c)
  MESSAGE( FATAL_ERROR "I2C is only (yet) supported in Linux!" )
- ENDIF(UNIX AND NOT APPLE)
+ ENDIF(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
 ENDIF(I2C_REQUIRED)
 
 IF(SPI_REQUIRED)
- IF(UNIX AND NOT APPLE)
+ IF(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
  LIST(APPEND BUSES_SOURCES buses/spi)
- ELSE(UNIX AND NOT APPLE)
+ ELSE(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
  # Only Linux is supported at the moment
  #LIST(APPEND BUSES_SOURCES ../contrib/win32/libnfc/buses/spi)
  MESSAGE( FATAL_ERROR "SPI is only (yet) supported in Linux!" )
- ENDIF(UNIX AND NOT APPLE)
+ ENDIF(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
 ENDIF(SPI_REQUIRED)
 
 INCLUDE_DIRECTORIES(${CMAKE_CURRENT_SOURCE_DIR}/buses)