gentoo-overlay/sys-boot/vboot-utils/files/vboot-utils-80-musl-fts.patch

--- a/Makefile
+++ b/Makefile
@@ -231,4 +231,7 @@
 ifndef HAVE_MUSL
   CFLAGS += -DHAVE_EXECINFO_H
+# Musl doesn't have fts.h so enable linking to the standalone lib.
+else
+  MUSL_LIBS := -lfts
 endif
 
@@ -1043,5 +1046,5 @@
 
 # FUTIL_LIBS is shared by FUTIL_BIN and TEST_FUTIL_BINS.
-FUTIL_LIBS = ${CRYPTO_LIBS} ${LIBZIP_LIBS}
+FUTIL_LIBS = ${CRYPTO_LIBS} ${LIBZIP_LIBS} ${MUSL_LIBS}
 
 ${FUTIL_BIN}: LDLIBS += ${FUTIL_LIBS}