Move INLINE macro into config.h. That's really where it belongs anyhow, since it is used only internally, and putting it in jconfig.h was causing problems with DevIL.

ChangeLog.txt

@@ -19,6 +19,11 @@ and pixel formats (TurboJPEG API), which allow applications to specify that,
 when decompressing to a 4-component RGB buffer, the unused byte should be set
 to 0xFF so that it can be interpreted as an opaque alpha channel.
 
+[5] Fixed regression issue whereby DevIL failed to build against libjpeg-turbo
+because libjpeg-turbo's distributed version of jconfig.h contained an INLINE
+macro, which conflicted with a similar macro in DevIL.  This macro is used only
+internally when building libjpeg-turbo, so it was moved into config.h.
+
 
 1.1.90 (1.2 beta1)
 ==================

jccolor.c

@@ -14,6 +14,7 @@
 #include "jinclude.h"
 #include "jpeglib.h"
 #include "jsimd.h"
+#include "config.h"
 
 
 /* Private subobject */

jconfig.h.in

@@ -30,9 +30,6 @@
 /* Compiler does not support pointers to unspecified structures. */
 #undef INCOMPLETE_TYPES_BROKEN
 
-/* How to obtain function inlining. */
-#undef INLINE
-
 /* Compiler has <strings.h> rather than standard <string.h>. */
 #undef NEED_BSD_STRINGS
 

jdcolor.c

@@ -14,6 +14,7 @@
 #include "jinclude.h"
 #include "jpeglib.h"
 #include "jsimd.h"
+#include "config.h"
 
 
 /* Private subobject */

jdmerge.c

@@ -38,6 +38,7 @@
 #include "jinclude.h"
 #include "jpeglib.h"
 #include "jsimd.h"
+#include "config.h"
 
 #ifdef UPSAMPLE_MERGING_SUPPORTED
 

win/config.h.in

@@ -1,3 +1,13 @@
 #define VERSION "@VERSION@"
 #define BUILD "@BUILD@"
 #define PACKAGE_NAME "@CMAKE_PROJECT_NAME@"
+
+#ifndef INLINE
+#if defined(__GNUC__)
+#define INLINE __attribute__((always_inline))
+#elif defined(_MSC_VER)
+#define INLINE __forceinline
+#else
+#define INLINE
+#endif
+#endif

win/jconfig.h.in

@@ -33,16 +33,6 @@ typedef signed int INT32;
 #endif
 #define XMD_H                   /* prevent jmorecfg.h from redefining it */
 
-#ifndef INLINE
-#if defined(__GNUC__)
-#define INLINE __attribute__((always_inline))
-#elif defined(_MSC_VER)
-#define INLINE __forceinline
-#else
-#define INLINE
-#endif
-#endif
-
 #ifdef JPEG_INTERNALS
 
 #undef RIGHT_SHIFT_IS_UNSIGNED