Add optional openssl accelerated versions of hash functions, loosely based on

a patch from Elliott Hughes, who said:

[PATCH] Add support for libcrypto for MD5/SHA.

Orders of magnitude faster (for architectures where OpenSSL/BoringSSL
has optimized assembler).

Also adds sha224sum, sha256sum, sha384sum, and sha512sum for folks
building with libcrypto.

The fallback portable C implementations could easily be refactored
to be API-compatible, but I don't know whether they'd stay here or
move to lib/ so I've left that part alone for now.

2 files changed, 5 insertions, 10 deletions

diff --git a/scripts/make.sh b/scripts/make.sh
index 07bf2ac8..50415e55 100755
--- a/scripts/make.sh
+++ b/scripts/make.sh
@@ -103,7 +103,7 @@ then
   # for it.
 
   > generated/optlibs.dat
-  for i in util crypt m resolv selinux smack attr rt
+  for i in util crypt m resolv selinux smack attr rt crypto
   do
     echo "int main(int argc, char *argv[]) {return 0;}" | \
     ${CROSS_COMPILE}${CC} $CFLAGS -xc - -o generated/libprobe -Wl,--as-needed -l$i > /dev/null 2>/dev/null &&
diff --git a/scripts/mkflags.c b/scripts/mkflags.c
index 8b3d0aa3..27fc5172 100644
--- a/scripts/mkflags.c
+++ b/scripts/mkflags.c
@@ -122,7 +122,7 @@ int main(int argc, char *argv[])
 
   for (;;) {
     struct flag *flist, *aflist, *offlist;
-    char *gaps, *mgaps, c;
+    char *mgaps;
     unsigned bit;
 
     *command = *flags = *allflags = 0;
@@ -142,14 +142,9 @@ int main(int argc, char *argv[])
     bit = 0;
     printf("// %s %s %s\n", command, flags, allflags);
     mgaps = mark_gaps(flags, allflags);
-    for (gaps = mgaps; *gaps == 1; gaps++);
-    if (*gaps) c = '"';
-    else {
-      c = ' ';
-      gaps = "0";
-    }
-    printf("#undef OPTSTR_%s\n#define OPTSTR_%s %c%s%c\n",
-            command, command, c, gaps, c);
+    // If command disabled, use allflags for OLDTOY()
+    printf("#undef OPTSTR_%s\n#define OPTSTR_%s \"%s\"\n",
+            command, command, strcmp(flags, " ") ? mgaps : allflags);
     free(mgaps);
 
     flist = digest(flags);