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-rw-r--r--configure.in1
-rw-r--r--gc.c6
2 files changed, 7 insertions, 0 deletions
diff --git a/configure.in b/configure.in
index ab0cea9905..923843fe6f 100644
--- a/configure.in
+++ b/configure.in
@@ -1009,6 +1009,7 @@ main()
ac_cv_type_struct_timeval=yes
ac_cv_func_clock_gettime=yes
ac_cv_func_clock_getres=yes
+ ac_cv_func_malloc_usable_size=no
AC_CHECK_TYPE([NET_LUID], [], [],
[@%:@include <windows.h>
@%:@include <iphlpapi.h>])
diff --git a/gc.c b/gc.c
index c15b19c44f..9963cdec52 100644
--- a/gc.c
+++ b/gc.c
@@ -35,6 +35,12 @@
# define __has_feature(x) 0
#endif
+#ifndef HAVE_MALLOC_USABLE_SIZE
+# ifdef _WIN32
+# define malloc_usable_size(a) _msize(a)
+# endif
+#endif
+
#if /* is ASAN enabled? */ \
__has_feature(address_sanitizer) /* Clang */ || \
defined(__SANITIZE_ADDRESS__) /* GCC 4.8.x */