Fix compilation on Windows

libraw/CMakeLists.txt

@@ -97,7 +97,6 @@ IF(JPEG_FOUND)
 
     TRY_COMPILE(_jpeglib_version_compile_result ${CMAKE_BINARY_DIR} ${_jpeglib_version_source_file}
                 CMAKE_FLAGS "${_jpeglib_version_include_dirs}"
-                COMPILE_OUTPUT_VARIABLE _jpeglib_version_compile_output_var
                )
     IF(_jpeglib_version_compile_result)
         MESSAGE(STATUS "Identified libjpeg version less than 80 (too low)")
@@ -109,7 +108,6 @@ MACRO_LOG_FEATURE(JPEG_FOUND "libjpeg" "JPEG image format support" "http://www.i
 
 # Flag to use libjpeg with LibRaw DNG lossy codec
 IF(JPEG_FOUND)
-    ADD_DEFINITIONS(-DUSE_JPEG)
     ADD_DEFINITIONS(-DUSE_JPEG8)
     INCLUDE_DIRECTORIES(${JPEG_INCLUDE_DIR})
 ENDIF()

libraw/internal/dcraw_common.cpp

@@ -5829,8 +5829,8 @@ void CLASS parse_ciff (int offset, int length)
       thumb_length = len;
     }
     if (type == 0x1818) {
-      shutter = pow (2, -int_to_float((get4(),get4())));
-      aperture = pow (2, int_to_float(get4())/2);
+      shutter = pow (2, (double)(-int_to_float((get4(),get4()))));
+      aperture = pow (2, (double)(int_to_float(get4())/2));
     }
     if (type == 0x102a) {
       iso_speed = pow (2, (get4(),get2())/32.0 - 4) * 50;

libraw/src/libraw_datastream.cpp

 #ifdef WIN32
+#include <math.h>
 #ifdef __MINGW32__
     #define _WIN32_WINNT 0x0500
     #include <stdexcept>