Fix multilib issue like jconfig.h (#1264675)

Signed-off-by: Petr Hracek <phracek@redhat.com>

libjpeg-turbo.spec

@@ -1,6 +1,6 @@
 Name:           libjpeg-turbo
 Version:        1.4.1
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        A MMX/SSE2 accelerated library for manipulating JPEG image files
 License:        IJG
 URL:            http://sourceforge.net/projects/libjpeg-turbo
@@ -84,6 +84,44 @@ find %{buildroot} -name "*.la" -delete
 # Fix perms
 chmod -x README-turbo.txt
 
+# multilib header hack
+# we only apply this to known Red Hat multilib arches, per bug #1264675
+case `uname -i` in
+  i386 | ppc | s390 | sparc )
+    wordsize="32"
+    ;;
+  x86_64 | ppc64 | s390x | sparc64 )
+    wordsize="64"
+    ;;
+  *)
+    wordsize=""
+    ;;
+esac
+
+if test -n "$wordsize"
+then
+  mv $RPM_BUILD_ROOT%{_includedir}/jconfig.h \
+     $RPM_BUILD_ROOT%{_includedir}/jconfig-$wordsize.h
+
+  cat >$RPM_BUILD_ROOT%{_includedir}/jconfig.h <<EOF
+#ifndef JCONFIG_H_MULTILIB
+#define JCONFIG_H_MULTILIB
+
+#include <bits/wordsize.h>
+
+#if __WORDSIZE == 32
+# include "jconfig-32.h"
+#elif __WORDSIZE == 64
+# include "jconfig-64.h"
+#else
+# error "unexpected value for __WORDSIZE macro"
+#endif
+
+#endif
+EOF
+
+fi
+
 %check
 make test %{?_smp_mflags}
 
@@ -99,7 +137,7 @@ make test %{?_smp_mflags}
 
 %files devel
 %doc coderules.txt jconfig.txt libjpeg.txt structure.txt example.c
-%{_includedir}/jconfig.h
+%{_includedir}/jconfig*
 %{_includedir}/jerror.h
 %{_includedir}/jmorecfg.h
 %{_includedir}/jpegint.h
@@ -127,6 +165,9 @@ make test %{?_smp_mflags}
 %{_libdir}/libturbojpeg.so
 
 %changelog
+* Thu Oct 08 2015 Petr Hracek <phracek@redhat.com> - 1.4.1-2
+- Fix multilib issue like jconfig.h (#1264675)
+
 * Tue Jun 16 2015 Peter Robinson <pbrobinson@fedoraproject.org> 1.4.1-1
 - new upstream version 1.4.1
 - nasm available on all arches