By default, install the libraries into /opt/libjpeg-turbo/lib32 on any 32-bit system, not just x86, and into /opt/libjpeg-turbo/lib64 on any 64-bit system, not just x86-64. In particular, this addresses an issue with building TurboVNC and VirtualGL on ARM systems.

ChangeLog.txt

@@ -11,6 +11,16 @@ MIPS platforms.  This speeds up the compression of full-color JPEGs by 6-17%
 on such platforms and decompression by 3-5%.
 
 
+1.3.1
+=====
+
+[1] On Un*x systems, 'make install' now installs the libjpeg-turbo libraries
+into /opt/libjpeg-turbo/lib32 by default on any 32-bit system, not just x86,
+and into /opt/libjpeg-turbo/lib64 by default on any 64-bit system, not just
+x86-64.  You can override this by overriding either the 'prefix' or 'libdir'
+configure variables.
+
+
 1.3.0
 =====
 

configure.ac

@@ -52,14 +52,12 @@ if test "x${libdir}" = 'x${exec_prefix}/lib' -o "x${libdir}" = 'x${prefix}/lib';
       darwin*)
         ;;
       *)
-        case "$host_cpu" in
-          x86_64 | amd64)
-            libdir='${exec_prefix}/lib64'
-            ;;
-          i*86 | x86 | ia32)
-            libdir='${exec_prefix}/lib32'
-            ;;
-        esac
+        AC_CHECK_SIZEOF(long)
+        if test "${ac_cv_sizeof_long}" = "8"; then
+          libdir='${exec_prefix}/lib64'
+        elif test "${ac_cv_sizeof_long}" = "4"; then
+          libdir='${exec_prefix}/lib32'
+        fi
         ;;
     esac
   fi