Use bc's "print" feature whenever it is available,

not just on certain platforms.

crypto/bn/bntest.c

@@ -109,11 +109,9 @@ static const char rnd_seed[] = "string to make the random number generator think
 static void message(BIO *out, char *m)
 	{
 	fprintf(stderr, "test %s\n", m);
-#if defined(linux) || defined(__FreeBSD__) /* can we use GNU bc features? */
 	BIO_puts(out, "print \"test ");
 	BIO_puts(out, m);
 	BIO_puts(out, "\\n\"\n");
-#endif
 	}
 
 int main(int argc, char *argv[])

test/Makefile.ssl

@@ -195,12 +195,8 @@ test_bn:
 	@echo starting big number library test, could take a while...
 	@./$(BNTEST) >tmp.bntest
 	@echo quit >>tmp.bntest
-	@if sh ./bctest; then \
-	    echo "running bc"; \
-	    bc tmp.bntest 2>&1 | $(PERL) -e 'while (<STDIN>) {if (/^test (.*)/) {print STDERR "\nverify $$1";} elsif (!/^0$$/) {die "\nFailed! bc: $$_";} print STDERR "."; $$i++;} print STDERR "\n$$i tests passed\n"'; \
-	else \
-	    echo "skipping bc-based verification"; \
-	fi
+	@echo "running bc"
+	@<tmp.bntest sh -c "`sh ./bctest`" 2>&1 | $(PERL) -e '$$i=0; while (<STDIN>) {if (/^test (.*)/) {print STDERR "\nverify $$1";} elsif (!/^0$$/) {die "\nFailed! bc: $$_";} print STDERR "."; $$i++;} print STDERR "\n$$i tests passed\n"'
 	@echo 'test a^b%c implementations'
 	./$(EXPTEST)
 

test/bctest

@@ -4,6 +4,11 @@
 # is installed.
 # ('make test_bn' should not try to run 'bc' if it does not exist or if
 # it is the broken SunOS 5.[78] bc, which fails the following test.)
+#
+# If 'bc' works, we also test if it knows the 'print' command.
+#
+# In any case, output an appropriate command line for running (or not
+# running) bc.
 
 if [ 0 != "`bc <<\EOF
 obase=16
@@ -22,7 +27,18 @@ b=DCE91E7D120B983EA9A104B5A96D634DD644C37657B1C7860B45E6838999B3DCE5A555583C6\
 EOF`" ]
 then
   echo "bc does not work.  Consider installing GNU bc." >&2
+  echo "cat >/dev/null"
   exit 1
 else
+  # bc works, good.
+  # Now check if it knows the 'print' command.
+  if [ "OK" = "`bc 2>/dev/null <<\EOF
+print \"OK\"
+EOF`" ]
+  then
+    echo "bc"
+  else
+    echo "sed 's/print.*//' | bc"
+  fi
   exit 0
 fi