For the main directory, Makefile.org is significant :-)

Makefile.org

@@ -585,7 +585,7 @@ test:   tests
 
 tests: rehash
 	@(cd test && echo "testing..." && \
-	$(MAKE) CC='${CC}' CFLAG='${CFLAG}' INSTALLTOP='${INSTALLTOP}' PEX_LIBS='${PEX_LIBS}' EX_LIBS='${EX_LIBS}' BN_ASM='${BN_ASM}' DES_ENC='${DES_ENC}' BF_ENC='${BF_ENC}' CAST_ENC='${CAST_ENC}' RC4_ENC='${RC4_ENC}' RC5_ENC='${RC5_ENC}' SDIRS='${SDIRS}' SHA1_ASM_OBJ='${SHA1_ASM_OBJ}' MD5_ASM_OBJ='${MD5_ASM_OBJ}' RMD160_ASM_OBJ='${RMD160_ASM_OBJ}' AR='${AR}' PERL='${PERL}' TESTS='${TESTS}' KRB5_INCLUDES='${KRB5_INCLUDES}' LIBKRB5='${LIBKRB5}' EXE_EXT='${EXE_EXT}' OPENSSL_DEBUG_MEMORY=on tests );
+	$(MAKE) CC='${CC}' PLATFORM='${PLATFORM}' CFLAG='${CFLAG}' SDIRS='$(SDIRS)' INSTALLTOP='${INSTALLTOP}' PEX_LIBS='${PEX_LIBS}' EX_LIBS='${EX_LIBS}' BN_ASM='${BN_ASM}' DES_ENC='${DES_ENC}' BF_ENC='${BF_ENC}' CAST_ENC='${CAST_ENC}' RC4_ENC='${RC4_ENC}' RC5_ENC='${RC5_ENC}' SHA1_ASM_OBJ='${SHA1_ASM_OBJ}' MD5_ASM_OBJ='${MD5_ASM_OBJ}' RMD160_ASM_OBJ='${RMD160_ASM_OBJ}' AR='${AR}' PROCESSOR='${PROCESSOR}' PERL='${PERL}' RANLIB='${RANLIB}' TESTS='${TESTS}' KRB5_INCLUDES='${KRB5_INCLUDES}' LIBKRB5='${LIBKRB5}' EXE_EXT='${EXE_EXT}' SHARED_LIBS='${SHARED_LIBS}' SHLIB_EXT='${SHLIB_EXT}' SHLIB_TARGET='${SHLIB_TARGET}' TESTS='${TESTS}' OPENSSL_DEBUG_MEMORY=on tests );
 	@LD_LIBRARY_PATH="`pwd`"; SHLIB_PATH="`pwd`"; LIBPATH="`pwd`"; \
 		export LD_LIBRARY_PATH SHLIB_PATH LIBPATH; \
 		apps/openssl version -a