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-rw-r--r--boehm-gc/configure.in3
1 files changed, 3 insertions, 0 deletions
diff --git a/boehm-gc/configure.in b/boehm-gc/configure.in
index 9da2040..95e9d7c 100644
--- a/boehm-gc/configure.in
+++ b/boehm-gc/configure.in
@@ -116,6 +116,9 @@ case "$THREADS" in
win32)
AC_DEFINE(GC_WIN32_THREADS)
AC_DEFINE(NO_GETENV)
+ if test $enable_shared = yes; then
+ AC_DEFINE(GC_DLL)
+ fi
;;
decosf1 | irix | mach | os2 | solaris | dce | vxworks)
AC_MSG_ERROR(thread package $THREADS not yet supported)