Fix build on MacOS.

Reviewed-by: Andy Polyakov

Configurations/10-main.conf

@@ -641,14 +641,7 @@
     "linux-x86_64-clang" => {
         inherit_from     => [ "linux-x86_64" ],
         cc               => "clang",
-        # TODO(openssl-team): fix problems and investigate if (at least) the
-        # following warnings can also be enabled:
-        # -Wconditional-uninitialized, -Wswitch-enum, -Wunused-macros,
-        # -Wmissing-field-initializers, -Wmissing-variable-declarations,
-        # -Wincompatible-pointer-types-discards-qualifiers, -Wcast-align,
-        # -Wunreachable-code -Wunused-parameter -Wlanguage-extension-token
-        # -Wextended-offsetof
-        cflags           => "-m64 -DL_ENDIAN -Wall -Wextra $clang_disabled_warnings -Qunused-arguments",
+        cflags           => "-m64 -DL_ENDIAN -Wall -Wextra -Qunused-arguments",
     },
     "linux-x32" => {
         inherit_from     => [ "linux-generic32", asm("x86_64_asm") ],

Configure

@@ -112,7 +112,15 @@ my $usage="Usage: Configure [no-<cipher> ...] [enable-<cipher> ...] [experimenta
 
 my $gcc_devteam_warn = "-Wall -pedantic -DPEDANTIC -Wno-long-long -Wsign-compare -Wmissing-prototypes -Wshadow -Wformat -Wtype-limits -Werror -DCRYPTO_MDEBUG_ALL -DCRYPTO_MDEBUG_ABORT -DREF_CHECK -DDEBUG_UNUSED";
 
-my $clang_disabled_warnings = "-Wno-unused-parameter -Wno-missing-field-initializers -Wno-language-extension-token -Wno-extended-offsetof";
+# These are used in addition to $gcc_devteam_warn when the compiler is clang.
+# TODO(openssl-team): fix problems and investigate if (at least) the
+# following warnings can also be enabled: -Wconditional-uninitialized,
+# -Wswitch-enum, -Wunused-macros, -Wmissing-field-initializers,
+# -Wmissing-variable-declarations,
+# -Wincompatible-pointer-types-discards-qualifiers, -Wcast-align,
+# -Wunreachable-code -Wunused-parameter -Wlanguage-extension-token
+# -Wextended-offsetof
+my $clang_devteam_warn = "-Wno-unused-parameter -Wno-missing-field-initializers -Wno-language-extension-token -Wno-extended-offsetof";
 
 my $strict_warnings = 0;
 
@@ -1726,12 +1734,21 @@ if ($shlib_version_number =~ /(^[0-9]*)\.([0-9\.]*)/)
 
 if ($strict_warnings)
 	{
+	my $ecc = $cc;
+	$ecc = "clang" if `$cc --version 2>&1` =~ /clang/;
 	my $wopt;
-	die "ERROR --strict-warnings requires gcc or clang" unless ($cc =~ /gcc$/ or $cc =~ /clang$/);
+	die "ERROR --strict-warnings requires gcc or clang" unless ($ecc =~ /gcc$/ or $ecc =~ /clang$/);
 	foreach $wopt (split /\s+/, $gcc_devteam_warn)
 		{
 		$cflags .= " $wopt" unless ($cflags =~ /$wopt/)
 		}
+	if ($ecc eq "clang")
+		{
+		foreach $wopt (split /\s+/, $clang_devteam_warn)
+			{
+			$cflags .= " $wopt" unless ($cflags =~ /$wopt/)
+			}
+		}
 	}
 
 open(IN,"<Makefile.org") || die "unable to read Makefile.org:$!\n";

config

@@ -518,10 +518,12 @@ case "$GUESSOS" in
 	ISA64=`(sysctl -n hw.optional.x86_64) 2>/dev/null`
 	if [ "$ISA64" = "1" -a -z "$KERNEL_BITS" ]; then
 	    echo "WARNING! If you wish to build 64-bit library, then you have to"
-	    echo "         invoke './Configure darwin64-x86_64-cc' *manually*."
+	    echo "         invoke './Configure darwin64-x86_64-cc $options' *manually*."
 	    if [ "$TEST" = "false" -a -t 1 ]; then
 	      echo "         You have about 5 seconds to press Ctrl-C to abort."
-	      (trap "stty `stty -g`" 2 0; stty -icanon min 0 time 50; read waste) <&1
+	      # The stty technique used elsewhere doesn't work on
+	      # MacOS. At least, right now on this Mac.
+	      sleep 5
 	    fi
 	fi
 	if [ "$ISA64" = "1" -a "$KERNEL_BITS" = "64" ]; then