New relocation-generating program (#1016)

* Update makefiles

* git subrepo clone git@github.com:EllipticEllipsis/fado.git tools/fado

subrepo:
  subdir:   "tools/fado"
  merged:   "46c4d751a"
upstream:
  origin:   "git@github.com:EllipticEllipsis/fado.git"
  branch:   "master"
  commit:   "46c4d751a"
git-subrepo:
  version:  "0.4.3"
  origin:   "https://github.com/ingydotnet/git-subrepo.git"
  commit:   "2f68596"

* git subrepo pull tools/fado

subrepo:
  subdir:   "tools/fado"
  merged:   "88114ebce"
upstream:
  origin:   "git@github.com:EllipticEllipsis/fado.git"
  branch:   "master"
  commit:   "88114ebce"
git-subrepo:
  version:  "0.4.3"
  origin:   "https://github.com/ingydotnet/git-subrepo.git"
  commit:   "2f68596"

* A few ideas for computing dependencies

* Remove reserved identifiers from spec.h and util.h
and add required headers

* Fix a couple more headers

* Program for reloc prerequisites

* git subrepo pull tools/fado

subrepo:
  subdir:   "tools/fado"
  merged:   "36a905f72"
upstream:
  origin:   "git@github.com:EllipticEllipsis/fado.git"
  branch:   "master"
  commit:   "36a905f72"
git-subrepo:
  version:  "0.4.3"
  origin:   "https://github.com/ingydotnet/git-subrepo.git"
  commit:   "2f68596"

* Update makefile to make dependency files and use overlay's name

* git subrepo pull tools/fado

subrepo:
  subdir:   "tools/fado"
  merged:   "43c339a59"
upstream:
  origin:   "git@github.com:EllipticEllipsis/fado.git"
  branch:   "master"
  commit:   "43c339a59"
git-subrepo:
  version:  "0.4.3"
  origin:   "https://github.com/ingydotnet/git-subrepo.git"
  commit:   "2f68596"

* Change awk to grep, delete ZAPD files, gitignore elf

* Delete all the cfg files

* Fix memory leaks

* Rename and add coloured errors

* Makefile tweaks
- preprocess spec before grep
- split order prerequisites via phony target to reduce dependency edges
- remove `resources` target
- remove separate overlays targets
- use `$(SPEC)` throughout
- change to using filenames of relocs for overlay names via `$*`
- Rearrange targets to better reflect their categories

* Update gitignore

* Review

* Add a check for the reloc file name

* get_segment_by_name

* get_stmt_id_by_stmt_name

* Cleaning up

* algorithm change

* function rename

* Fix typos

Co-authored-by: angie <angheloalf95@gmail.com>

tools/util.c

@@ -12,18 +12,18 @@ void util_fatal_error(const char *msgfmt, ...)
 {
     va_list args;
 
-    fputs("error: ", stderr);
+    fputs(ERRMSG_START, stderr);
 
     va_start(args, msgfmt);
     vfprintf(stderr, msgfmt, args);
     va_end(args);
 
-    fputc('\n', stderr);
+    fputs(ERRMSG_END "\n", stderr);
 
     exit(1);
 }
 
-// reads a whole file into memory, and returns a pointer to the data
+// reads a whole file into memory, and returns a malloc'd pointer to the data.
 void *util_read_whole_file(const char *filename, size_t *pSize)
 {
     FILE *file = fopen(filename, "rb");