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-rw-r--r--stdlib/Makefile7
-rw-r--r--stdlib/strfmon.c6
2 files changed, 13 insertions, 0 deletions
diff --git a/stdlib/Makefile b/stdlib/Makefile
index f875087..61c35eb 100644
--- a/stdlib/Makefile
+++ b/stdlib/Makefile
@@ -74,6 +74,13 @@ CFLAGS-bsearch.c = $(exceptions)
CFLAGS-msort.c = $(exceptions)
CFLAGS-qsort.c = $(exceptions)
+include ../Makeconfig
+
+ifneq (,$(filter %REENTRANT, $(defines)))
+CFLAGS-strfmon.c = -D_IO_MTSAFE_IO
+CFLAGS-strfmon_l.c = -D_IO_MTSAFE_IO
+endif
+
include ../Rules
diff --git a/stdlib/strfmon.c b/stdlib/strfmon.c
index eb4d096..e2d0802 100644
--- a/stdlib/strfmon.c
+++ b/stdlib/strfmon.c
@@ -101,6 +101,9 @@ __strfmon_l (char *s, size_t maxsize, __locale_t loc, const char *format, ...)
#endif
#ifdef USE_IN_LIBIO
_IO_strfile f;
+# ifdef _IO_MTSAFE_IO
+ _IO_lock_t lock;
+# endif
#else
FILE f;
#endif
@@ -525,6 +528,9 @@ __strfmon_l (char *s, size_t maxsize, __locale_t loc, const char *format, ...)
/* Print the number. */
#ifdef USE_IN_LIBIO
+# ifdef _IO_MTSAFE_IO
+ f._sbf._f._lock = &lock;
+# endif
_IO_init ((_IO_FILE *) &f, 0);
_IO_JUMPS ((struct _IO_FILE_plus *) &f) = &_IO_str_jumps;
_IO_str_init_static ((_IO_strfile *) &f, dest, (s + maxsize) - dest, dest);