Fix --strict-warnings build of ppc-linux target

[openssl.git] / Configure

diff --git a/Configure b/Configure
index ffc5fe5d33a89bfcbd53c03bc4a1f1e27a3b560a..62c354abf0d8d5503e83561df4f8237db9acf202 100755 (executable)
--- a/Configure
+++ b/Configure
@@ -1407,7 +1407,7 @@ unless ($disabled{asm}) {
     }
 }
 
-my %predefined = compiler_predefined($config{CC});
+my %predefined = compiler_predefined($config{CROSS_COMPILE}.$config{CC});
 
 # Check for makedepend capabilities.
 if (!$disabled{makedepend}) {
@@ -1415,9 +1415,11 @@ if (!$disabled{makedepend}) {
         # For VC- and vms- targets, there's nothing more to do here.  The
         # functionality is hard coded in the corresponding build files for
         # cl (Windows) and CC/DECC (VMS).
-    } elsif ($predefined{__GNUC__} >= 3) {
+    } elsif (($predefined{__GNUC__} // -1) >= 3
+            && !($predefined{__APPLE_CC__} && !$predefined{__clang__})) {
         # We know that GNU C version 3 and up as well as all clang
-        # versions support dependency generation
+        # versions support dependency generation, but Xcode did not
+        # handle $cc -M before clang support (but claims __GNUC__ = 3)
         $config{makedepprog} = "\$(CROSS_COMPILE)$config{CC}";
     } else {
         # In all other cases, we look for 'makedepend', and disable the
@@ -1427,6 +1429,27 @@ if (!$disabled{makedepend}) {
     }
 }
 
+if (!$disabled{asm}) {
+    # probe for -Wa,--noexecstack option...
+    if ($predefined{__clang__}) {
+        # clang has builtin assembler, which doesn't recognize --help,
+        # but it apparently recognizes the option in question on all
+        # supported platforms even when it's meaningless. In other words
+        # probe would fail, but probed option always accepted...
+        push @{$config{cflags}}, "-Wa,--noexecstack", "-Qunused-arguments";
+    } elsif ($^O ne 'VMS') {
+        my $cc = $config{CROSS_COMPILE}.$config{CC};
+        open(PIPE, "$cc -Wa,--help -c -o null.$$.o -x assembler /dev/null 2>&1 |");
+        while(<PIPE>) {
+            if (m/--noexecstack/) {
+                push @{$config{cflags}}, "-Wa,--noexecstack";
+                last;
+            }
+        }
+        close(PIPE);
+        unlink("null.$$.o");
+    }
+}
 
 # Deal with bn_ops ###################################################
 
@@ -1468,11 +1491,6 @@ if (defined($config{api})) {
     push @{$config{defines}}, $apiflag;
 }
 
-if (defined($predefined{__clang__}) && !$disabled{asm}) {
-    push @{$config{cflags}}, "-Qunused-arguments";
-    push @{$config{cxxflags}}, "-Qunused-arguments" if $config{CXX};
-}
-
 if ($strict_warnings)
        {
        my $wopt;
@@ -3052,28 +3070,27 @@ sub run_dofile
 
 sub compiler_predefined {
     state %predefined;
-    my $default_compiler = shift;
+    my $cc = shift;
 
     return () if $^O eq 'VMS';
 
-    die 'compiler_predefined called without a default compiler'
-        unless $default_compiler;
+    die 'compiler_predefined called without a compiler command'
+        unless $cc;
 
-    if (! $predefined{$default_compiler}) {
-        my $cc = "$config{CROSS_COMPILE}$default_compiler";
+    if (! $predefined{$cc}) {
 
-        $predefined{$default_compiler} = {};
+        $predefined{$cc} = {};
 
         # collect compiler pre-defines from gcc or gcc-alike...
         open(PIPE, "$cc -dM -E -x c /dev/null 2>&1 |");
         while (my $l = <PIPE>) {
             $l =~ m/^#define\s+(\w+(?:\(\w+\))?)(?:\s+(.+))?/ or last;
-            $predefined{$default_compiler}->{$1} = $2 // '';
+            $predefined{$cc}->{$1} = $2 // '';
         }
         close(PIPE);
     }
 
-    return %{$predefined{$default_compiler}};
+    return %{$predefined{$cc}};
 }
 
 sub which