diff -r -u libjpeg-turbo-1.4.2/cdjpeg.c libjpeg-turbo-1.4.2.new/cdjpeg.c
--- libjpeg-turbo-1.4.2/cdjpeg.c	2015-09-21 14:48:32.000000000 -0400
+++ libjpeg-turbo-1.4.2.new/cdjpeg.c	2016-02-20 22:40:57.973194439 -0500
@@ -14,9 +14,10 @@
 #include "cdjpeg.h"             /* Common decls for cjpeg/djpeg applications */
 #include <ctype.h>              /* to declare isupper(), tolower() */
 #ifdef USE_SETMODE
-#include <fcntl.h>              /* to declare setmode()'s parameter macros */
-/* If you have setmode() but not <io.h>, just delete this line: */
-#include <io.h>                 /* to declare setmode() */
+# include <fcntl.h>             /* to declare setmode()'s parameter macros */
+# ifdef HAVE_IO_H
+#   include <io.h>              /* to declare setmode() */
+# endif
 #endif
 
 
diff -r -u libjpeg-turbo-1.4.2/CMakeLists.txt libjpeg-turbo-1.4.2.new/CMakeLists.txt
--- libjpeg-turbo-1.4.2/CMakeLists.txt	2016-02-20 22:54:11.404336104 -0500
+++ libjpeg-turbo-1.4.2.new/CMakeLists.txt	2016-02-20 23:15:04.482449981 -0500
@@ -288,13 +288,28 @@
 endif()
 
 if(WITH_12BIT)
-  set(COMPILE_FLAGS "-DGIF_SUPPORTED -DPPM_SUPPORTED -DUSE_SETMODE")
+  set(COMPILE_FLAGS "-DGIF_SUPPORTED -DPPM_SUPPORTED")
 else()
-  set(COMPILE_FLAGS "-DBMP_SUPPORTED -DGIF_SUPPORTED -DPPM_SUPPORTED -DTARGA_SUPPORTED -DUSE_SETMODE")
+  set(COMPILE_FLAGS "-DBMP_SUPPORTED -DGIF_SUPPORTED -DPPM_SUPPORTED -DTARGA_SUPPORTED")
   set(CJPEG_BMP_SOURCES rdbmp.c rdtarga.c)
   set(DJPEG_BMP_SOURCES wrbmp.c wrtarga.c)
 endif()
 
+include(CheckIncludeFiles)
+check_include_files(io.h HAVE_IO_H)
+if(HAVE_IO_H)
+  set(COMPILE_FLAGS "-DHAVE_IO_H ${COMPILE_FLAGS}")
+  set(SETMODE_HEADERS "fcntl.h;io.h")
+else()
+  set(SETMODE_HEADERS "fcntl.h")
+endif()
+
+include(CheckPrototypeDefinition)
+check_prototype_definition(setmode "int setmode(int fd, int mode)" "0" ${SETMODE_HEADERS} HAVE_SETMODE) 
+if(HAVE_SETMODE)
+  set(COMPILE_FLAGS "-DUSE_SETMODE ${COMPILE_FLAGS}")
+endif()
+
 if(ENABLE_STATIC)
   add_executable(cjpeg-static cjpeg.c cdjpeg.c rdgif.c rdppm.c rdswitch.c
     ${CJPEG_BMP_SOURCES})
@@ -308,7 +323,7 @@
 
   add_executable(jpegtran-static jpegtran.c cdjpeg.c rdswitch.c transupp.c)
   target_link_libraries(jpegtran-static jpeg-static)
-  set_property(TARGET jpegtran-static PROPERTY COMPILE_FLAGS "-DUSE_SETMODE")
+  set_property(TARGET jpegtran-static PROPERTY COMPILE_FLAGS ${COMPILE_FLAGS})
 endif()
 
 add_executable(rdjpgcom rdjpgcom.c)
@@ -825,8 +840,8 @@
   if(ENABLE_STATIC)
     install(TARGETS turbojpeg-static ARCHIVE DESTINATION lib)
     if(NOT ENABLE_SHARED)
-      install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/tjbench-static.exe
-        DESTINATION bin RENAME tjbench.exe)
+      install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/tjbench-static${CMAKE_EXECUTABLE_SUFFIX}
+        DESTINATION bin RENAME tjbench${CMAKE_EXECUTABLE_SUFFIX})
     endif()
   endif()
   install(FILES ${CMAKE_SOURCE_DIR}/turbojpeg.h DESTINATION include)
@@ -835,12 +850,12 @@
 if(ENABLE_STATIC)
   install(TARGETS jpeg-static ARCHIVE DESTINATION lib)
   if(NOT ENABLE_SHARED)
-    install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/cjpeg-static.exe
-      DESTINATION bin RENAME cjpeg.exe)
-    install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/djpeg-static.exe
-      DESTINATION bin RENAME djpeg.exe)
-    install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/jpegtran-static.exe
-      DESTINATION bin RENAME jpegtran.exe)
+    install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/cjpeg-static${CMAKE_EXECUTABLE_SUFFIX}
+      DESTINATION bin RENAME cjpeg${CMAKE_EXECUTABLE_SUFFIX})
+    install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/djpeg-static${CMAKE_EXECUTABLE_SUFFIX}
+      DESTINATION bin RENAME djpeg${CMAKE_EXECUTABLE_SUFFIX})
+    install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/jpegtran-static${CMAKE_EXECUTABLE_SUFFIX}
+      DESTINATION bin RENAME jpegtran${CMAKE_EXECUTABLE_SUFFIX})
   endif()
 endif()
 
diff -r -u libjpeg-turbo-1.4.2/rdjpgcom.c libjpeg-turbo-1.4.2.new/rdjpgcom.c
--- libjpeg-turbo-1.4.2/rdjpgcom.c	2015-09-21 14:48:32.000000000 -0400
+++ libjpeg-turbo-1.4.2.new/rdjpgcom.c	2016-02-20 22:41:41.153502798 -0500
@@ -22,9 +22,10 @@
 #endif
 #include <ctype.h>              /* to declare isupper(), tolower() */
 #ifdef USE_SETMODE
-#include <fcntl.h>              /* to declare setmode()'s parameter macros */
-/* If you have setmode() but not <io.h>, just delete this line: */
-#include <io.h>                 /* to declare setmode() */
+# include <fcntl.h>             /* to declare setmode()'s parameter macros */
+# ifdef HAVE_IO_H
+#   include <io.h>              /* to declare setmode() */
+# endif
 #endif
 
 #ifdef USE_CCOMMAND             /* command-line reader for Macintosh */
diff -r -u libjpeg-turbo-1.4.2/wrjpgcom.c libjpeg-turbo-1.4.2.new/wrjpgcom.c
--- libjpeg-turbo-1.4.2/wrjpgcom.c	2015-09-21 14:48:32.000000000 -0400
+++ libjpeg-turbo-1.4.2.new/wrjpgcom.c	2016-02-20 22:41:20.297353819 -0500
@@ -21,9 +21,10 @@
 #endif
 #include <ctype.h>              /* to declare isupper(), tolower() */
 #ifdef USE_SETMODE
-#include <fcntl.h>              /* to declare setmode()'s parameter macros */
-/* If you have setmode() but not <io.h>, just delete this line: */
-#include <io.h>                 /* to declare setmode() */
+# include <fcntl.h>             /* to declare setmode()'s parameter macros */
+# ifdef HAVE_IO_H
+#   include <io.h>              /* to declare setmode() */
+# endif
 #endif
 
 #ifdef USE_CCOMMAND             /* command-line reader for Macintosh */