nixpkgs/pkgs/development/compilers/gcc/no-sys-dirs-riscv.patch

--- a/gcc/config/riscv/linux.h
+++ b/gcc/config/riscv/linux.h
@@ -69,8 +69,4 @@
 
 #define TARGET_ASM_FILE_END file_end_indicate_exec_stack
 
-#define STARTFILE_PREFIX_SPEC 			\
-   "/lib" XLEN_SPEC "/" ABI_SPEC "/ "		\
-   "/usr/lib" XLEN_SPEC "/" ABI_SPEC "/ "	\
-   "/lib/ "					\
-   "/usr/lib/ "
+#define STARTFILE_PREFIX_SPEC ""