Fix the build system.

The improvements are:

- use most of the default "Makefile" for standard packaging;
- also use the default ".gitignore" with for the derived assets;
- don't impose so many $CFLAGS on the user.  GCC still needs to be given
  the `-ffreestanding` flag explicitly for us to get a good binary;
- stop using ad-hoc tools/* scripts, and avoid the code-generation
  anti-pattern overall on the build.  Some of the generated files were
  checked-in, and some were removed;
- remove empty files;
- use POSIX make(1) over gmake;
- add fuzz targets;
- partial "install" and "uninstall" targets;
- complete "clean" target.

The shortcomings are:
- only working on x86_64.  More platforms coming soon;
- code is still messy: way too many warnings, GNU/BSD specific
  extensions, inline assembly, and all kinds of unportable code;
- still only works with GCC and GCC-like compilers, and completly fails
  with tcc(1) and cproc(1);
- the `deps.mk` file is being maintained manually.  As I work on the
  source files I'll finish automating its generation with `mkdeps.sh`;
- still seems to be coupled with Linux;
- still is missing tests setup;
- still uses `#include <$NAME.h>` instead of the correct
  `#include "$NAME.h"` form.

The generated libgrovel.a did match the previous lib/libc.a 100%.

1 files changed, 0 insertions, 26 deletions

diff --git a/tools/add-cfi.common.awk b/tools/add-cfi.common.awk
deleted file mode 100644
index 04482d43..00000000
--- a/tools/add-cfi.common.awk
+++ /dev/null
@@ -1,26 +0,0 @@
-function hex2int(str,   i) {
-  str = tolower(str)
-
-  for (i = 1; i <= 16; i++) {
-    char = substr("0123456789abcdef", i, 1)
-    lookup[char] = i-1
-  }
-
-  result = 0
-  for (i = 1; i <= length(str); i++) {
-    result = result * 16
-    char   = substr(str, i, 1)
-    result = result + lookup[char]
-  }
-  return result
-}
-
-function parse_const(str) {
-  sign = sub(/^-/, "", str)
-  hex  = sub(/^0x/, "", str)
-  if (hex)
-    n = hex2int(str)
-  else
-    n = str+0
-  return sign ? -n : n
-}