work around gcc 4.8's generation of self-referential mem* functions at -O3
diff --git a/configure b/configure
index 87207b6..1d73472 100755
--- a/configure
+++ b/configure
@@ -104,6 +104,7 @@
CFLAGS_C99FSE=
CFLAGS_AUTO=
+CFLAGS_MEMOPS=
LDFLAGS_AUTO=
OPTIMIZE_GLOBS=
prefix=/usr/local/musl
@@ -236,6 +237,14 @@
|| { test "$ARCH" = i386 && tryflag CFLAGS_C99FSE -ffloat-store ; }
tryflag CFLAGS_C99FSE -frounding-math
+#
+# Check for options that may be needed to prevent the compiler from
+# generating self-referential versions of memcpy,, memmove, memcmp,
+# and memset. Really, we should add a check to determine if this
+# option is sufficient, and if not, add a macro to cripple these
+# functions with volatile...
+#
+tryflag CFLAGS_MEMOPS -fno-tree-loop-distribute-patterns
#
# If debugging is explicitly enabled, don't auto-enable optimizations
@@ -403,6 +412,7 @@
CC = $CC
CFLAGS= $CFLAGS_AUTO $CFLAGS
CFLAGS_C99FSE = $CFLAGS_C99FSE
+CFLAGS_MEMOPS = $CFLAGS_MEMOPS
CPPFLAGS = $CPPFLAGS
LDFLAGS = $LDFLAGS_AUTO $LDFLAGS
CROSS_COMPILE = $CROSS_COMPILE