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-rw-r--r--configure.in8
1 files changed, 8 insertions, 0 deletions
diff --git a/configure.in b/configure.in
index e7d4ecbb39..239e7fd874 100644
--- a/configure.in
+++ b/configure.in
@@ -40,6 +40,11 @@ AC_ARG_WITH(weak-symbols, dnl
   --with-weak-symbols	  if weak symbols are available in as and ld,
 	    weak=$withval, weak=no)
 
+AC_ARG_ENABLE(libio, dnl
+[  --enable-libio          build in GNU libio instead of GNU stdio],
+ 	      stdio=libio, stdio=stdio)
+AC_SUBST(stdio)
+
 dnl Arguments to enable or disable building the shared, profiled, and
 dnl -fomit-frame-pointer libraries.
 AC_ARG_ENABLE(shared, dnl
@@ -485,6 +490,9 @@ fi
 AC_SUBST(profile)
 AC_SUBST(omitfp)
 
+if test $stdio = libio; then
+  AC_DEFINE(USE_IN_LIBIO)
+fi
 
 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
   config_makefile=