diff -Nuar acpica-unix-20120816.orig/generate/unix/Makefile.config acpica-unix-20120816/generate/unix/Makefile.config
--- acpica-unix-20120816.orig/generate/unix/Makefile.config	2012-08-16 15:51:15.000000000 +0000
+++ acpica-unix-20120816/generate/unix/Makefile.config	2012-09-07 18:31:41.887229126 +0000
@@ -161,9 +161,9 @@
 #YACC=      byacc
 #YFLAGS +=  -v -d
 #
-YACC=       bison
+YACC=       LC_ALL=C bison
 YFLAGS +=   -v -d -y
 
-LEX=        flex
+LEX=        LC_ALL=C flex
 LFLAGS +=   -i -s