[DVDnav-discuss] r1191 - trunk/libdvdread/configure2

[rathann]

Author: rathann
Date: Fri Mar  5 22:16:01 2010
New Revision: 1191

Log:
Detect arch endianness. src/bswap.h depends on WORD_BIGENDIAN being
defined on big-endian arch to select appropriate macros. configure2
did not produce that definition in config.h, so the code ended up
being incorrect on ppc and other big-endian arches.

Approved by Nico.

Modified:
   trunk/libdvdread/configure2

Modified: trunk/libdvdread/configure2
==============================================================================
--- trunk/libdvdread/configure2	Thu Mar  4 20:14:17 2010	(r1190)
+++ trunk/libdvdread/configure2	Fri Mar  5 22:16:01 2010	(r1191)
@@ -108,6 +108,19 @@ case $targetos in
   ;;
 esac
 
+echo -n "Checking if we're big-endian... "
+bigendian=no
+TMPD=`mktemp -d`
+TMPC=$TMPD/endian.c
+TMPO=$TMPD/endian.o
+cat > $TMPC <<EOF
+unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
+EOF
+$cc $optimizations $cflags -c -o $TMPO $TMPC
+od -A n -t x1 $TMPO | grep -q '42 *49 *47 *45' && bigendian=yes
+rm -rf $TMPD
+echo "$bigendian"
+
 cat > config.mak << EOF
 # Automatically generated by configure, do not edit
 PREFIX=$PREFIX
@@ -136,6 +149,7 @@ cat > config.h << EOF
 /* Automatically generated by configure, do not edit */
 #include "version.h"
 EOF
+test "$bigendian" == "yes" && echo "#define WORDS_BIGENDIAN" || echo "#undef WORDS_BIGENDIAN" >> config.h
 
 # build tree in object directory if source path is different from current one
 if test "$source_path_used" != "no"; then