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-rw-r--r--sysdeps/mach/hurd/configure.in3
1 files changed, 3 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/configure.in b/sysdeps/mach/hurd/configure.in
index d9ebba5f4b..29bb7e07b9 100644
--- a/sysdeps/mach/hurd/configure.in
+++ b/sysdeps/mach/hurd/configure.in
@@ -1,6 +1,9 @@
 sinclude(./aclocal.m4)dnl Autoconf lossage.
 GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
 
+# GNU libc on the Hurd is always reentrant.
+DEFINES="$DEFINES -D_LIBC_REENTRANT"
+
 # Don't bother trying to generate any glue code to be compatible with the
 # existing system library, because we are the only system library.
 inhibit_glue=yes