cbfstool: Clean up in preparation for adding new files

This enables more warnings on the cbfstool codebase and fixes the
issues that surface as a result. A memory leak that used to occur
when compressing files with lzma is also found and fixed.
Finally, there are several fixes for the Makefile:
 - Its autodependencies used to be broken because the target for
   the .dependencies file was misnamed; this meant that Make
   didn't know how to rebuild the file, and so would silently
   skip the step of updating it before including it.
 - The ability to build to a custom output directory by defining
   the obj variable had bitrotted.
 - The default value of the obj variable was causing implicit
   rules not to apply when specifying a file as a target without
   providing a custom value for obj.
 - Add a distclean target for removing the .dependencies file.

BUG=chromium:461875
TEST=Build an image with cbfstool both before and after.
BRANCH=None

Change-Id: I951919d63443f2b053c2e67c1ac9872abc0a43ca
Signed-off-by: Sol Boucher <solb@chromium.org>
Original-Commit-Id: 49293443b4e565ca48d284e9a66f80c9c213975d
Original-Change-Id: Ia7350c2c3306905984cfa711d5fc4631f0b43d5b
Original-Signed-off-by: Sol Boucher <solb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/257340
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Original-Reviewed-by: Stefan Reinauer <reinauer@chromium.org>
Reviewed-on: http://review.coreboot.org/9937
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
diff --git a/util/cbfstool/cbfs-mkpayload.c b/util/cbfstool/cbfs-mkpayload.c
index d5bcca0..6eebbef 100644
--- a/util/cbfstool/cbfs-mkpayload.c
+++ b/util/cbfstool/cbfs-mkpayload.c
@@ -67,8 +67,8 @@
 	out->mem_len = xdr_be.get32(&inheader);
 }
 
-int parse_elf_to_payload(const struct buffer *input,
-			 struct buffer *output, uint32_t arch, comp_algo algo)
+int parse_elf_to_payload(const struct buffer *input, struct buffer *output,
+			 comp_algo algo)
 {
 	Elf64_Phdr *phdr;
 	Elf64_Ehdr ehdr;
@@ -87,7 +87,7 @@
 	if (!compress)
 		return -1;
 
-	if (elf_headers(input, arch, &ehdr, &phdr, &shdr) < 0)
+	if (elf_headers(input, &ehdr, &phdr, &shdr) < 0)
 		return -1;
 
 	DEBUG("start: parse_elf_to_payload\n");
@@ -325,7 +325,7 @@
 	while (fh->file_type == FILETYPE_PAD) {
 		unsigned long offset = (fh->size[2] << 16) | (fh->size[1] << 8) | fh->size[0];
 		ERROR("skipping %lu bytes of FV padding\n", offset);
-		fh = (ffs_file_header_t *)(((void*)fh) + offset);
+		fh = (ffs_file_header_t *)(((uintptr_t)fh) + offset);
 	}
 	if (fh->file_type != FILETYPE_SEC) {
 		ERROR("Not a usable UEFI firmware volume.\n");
@@ -337,7 +337,7 @@
 	while (cs->section_type == SECTION_RAW) {
 		unsigned long offset = (cs->size[2] << 16) | (cs->size[1] << 8) | cs->size[0];
 		ERROR("skipping %lu bytes of section padding\n", offset);
-		cs = (common_section_header_t *)(((void*)cs) + offset);
+		cs = (common_section_header_t *)(((uintptr_t)cs) + offset);
 	}
 	if (cs->section_type != SECTION_PE32) {
 		ERROR("Not a usable UEFI firmware volume.\n");
@@ -355,7 +355,7 @@
 	dh_offset = (unsigned long)dh - (unsigned long)input->data;
 	DEBUG("dos header offset = %x\n", dh_offset);
 
-	ch = (coff_header_t *)(((void *)dh)+dh->e_lfanew);
+	ch = (coff_header_t *)(((uintptr_t)dh)+dh->e_lfanew);
 
 	if (ch->machine == MACHINE_TYPE_X86) {
 		pe_opt_header_32_t *ph;