See Gentoo bug 917114 for my downstream report with build log included.
[r13894] broke parallel build by using the incorrect variable in a dependency.
I suggest the following change to /trunk/sdcc/Makefile.in:
-sdcc-libs: ${SDCC_SDBINUTILS}
+sdcc-libs: ${SDCC_BINUTILS}
Thanks!
Fixed in [r14420].
Related
Commit: [r14420]