Merge pull request #3594 from gilles-peskine-arm/fix-compat.sh-with-ubuntu-16.04-gnutls-2.7

Backport 2.7: Fix compat.sh with ubuntu 16.04 gnutls 2.7
diff --git a/ChangeLog.d/e2k-support.txt b/ChangeLog.d/e2k-support.txt
new file mode 100644
index 0000000..023b188
--- /dev/null
+++ b/ChangeLog.d/e2k-support.txt
@@ -0,0 +1,5 @@
+Features
+   * Support building on e2k (Elbrus) architecture: correctly enable
+     -Wformat-signedness, and fix the code that causes signed-one-bit-field
+     and sign-compare warnings. Contributed by makise-homura (Igor Molchanov)
+     <akemi_homura@kurisa.ch>.
diff --git a/ChangeLog.d/stdout-macro.txt b/ChangeLog.d/stdout-macro.txt
new file mode 100644
index 0000000..1c0f985
--- /dev/null
+++ b/ChangeLog.d/stdout-macro.txt
@@ -0,0 +1,4 @@
+Bugfix
+   * Fix bug in redirection of unit test outputs on platforms where stdout is
+     defined as a macro. First reported in #2311 and fix contributed in #3528.
+     Adopted for LTS branch 2.7 in #3600.
diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index 7df109d..ee7a1cf 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -2579,7 +2579,7 @@
             if( ret < 0 )
                 return( ret );
 
-            if ( (size_t)ret > len || ( INT_MAX > SIZE_MAX && ret > SIZE_MAX ) )
+            if ( (size_t)ret > len || ( INT_MAX > SIZE_MAX && ret > (int)SIZE_MAX ) )
             {
                 MBEDTLS_SSL_DEBUG_MSG( 1,
                     ( "f_recv returned %d bytes but only %lu were requested",
@@ -2634,7 +2634,7 @@
         if( ret <= 0 )
             return( ret );
 
-        if( (size_t)ret > ssl->out_left || ( INT_MAX > SIZE_MAX && ret > SIZE_MAX ) )
+        if( (size_t)ret > ssl->out_left || ( INT_MAX > SIZE_MAX && ret > (int)SIZE_MAX ) )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1,
                 ( "f_send returned %d bytes but only %lu bytes were sent",
diff --git a/programs/pkey/dh_genprime.c b/programs/pkey/dh_genprime.c
index e2fe24b..b0a6d77 100644
--- a/programs/pkey/dh_genprime.c
+++ b/programs/pkey/dh_genprime.c
@@ -115,7 +115,7 @@
     {
     usage:
         mbedtls_printf( USAGE );
-        mbedtls_exit( exit_code );
+        goto exit;
     }
 
     for( i = 1; i < argc; i++ )
diff --git a/tests/suites/helpers.function b/tests/suites/helpers.function
index e38df82..d205786 100644
--- a/tests/suites/helpers.function
+++ b/tests/suites/helpers.function
@@ -87,7 +87,7 @@
 /* A compile-time constant with the value 0. If `const_expr` is not a
  * compile-time constant with a nonzero value, cause a compile-time error. */
 #define STATIC_ASSERT_EXPR( const_expr )                                \
-    ( 0 && sizeof( struct { int STATIC_ASSERT : 1 - 2 * ! ( const_expr ); } ) )
+    ( 0 && sizeof( struct { unsigned int STATIC_ASSERT : 1 - 2 * ! ( const_expr ); } ) )
 /* Return the scalar value `value` (possibly promoted). This is a compile-time
  * constant if `value` is. `condition` must be a compile-time constant.
  * If `condition` is false, arrange to cause a compile-time error. */
@@ -172,45 +172,52 @@
 }
 
 #if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
-static int redirect_output( FILE** out_stream, const char* path )
+static int redirect_output( FILE* out_stream, const char* path )
 {
-    int stdout_fd = dup( fileno( *out_stream ) );
+    int out_fd, dup_fd;
+    FILE* path_stream;
 
-    if( stdout_fd == -1 )
+    out_fd = fileno( out_stream );
+    dup_fd = dup( out_fd );
+
+    if( dup_fd == -1 )
     {
-        return -1;
+        return( -1 );
     }
 
-    fflush( *out_stream );
-    fclose( *out_stream );
-    *out_stream = fopen( path, "w" );
-
-    if( *out_stream == NULL )
+    path_stream = fopen( path, "w" );
+    if( path_stream == NULL )
     {
-        close( stdout_fd );
-        return -1;
+        close( dup_fd );
+        return( -1 );
     }
 
-    return stdout_fd;
+    fflush( out_stream );
+    if( dup2( fileno( path_stream ), out_fd ) == -1 )
+    {
+        close( dup_fd );
+        fclose( path_stream );
+        return( -1 );
+    }
+
+    fclose( path_stream );
+    return( dup_fd );
 }
 
-static int restore_output( FILE** out_stream, int old_fd )
+static int restore_output( FILE* out_stream, int dup_fd )
 {
-    fflush( *out_stream );
-    fclose( *out_stream );
+    int out_fd = fileno( out_stream );
 
-    *out_stream = fdopen( old_fd, "w" );
-    if( *out_stream == NULL )
+    fflush( out_stream );
+    if( dup2( dup_fd, out_fd ) == -1 )
     {
-        return -1;
+        close( out_fd );
+        close( dup_fd );
+        return( -1 );
     }
 
-    return 0;
-}
-
-static void close_output( FILE* out_stream )
-{
-    fclose( out_stream );
+    close( dup_fd );
+    return( 0 );
 }
 #endif /* __unix__ || __APPLE__ __MACH__ */
 
diff --git a/tests/suites/main_test.function b/tests/suites/main_test.function
index 9b2fa2b..8a4137b 100644
--- a/tests/suites/main_test.function
+++ b/tests/suites/main_test.function
@@ -434,7 +434,7 @@
                  */
                 if( !option_verbose )
                 {
-                    stdout_fd = redirect_output( &stdout, "/dev/null" );
+                    stdout_fd = redirect_output( stdout, "/dev/null" );
                     if( stdout_fd == -1 )
                     {
                         /* Redirection has failed with no stdout so exit */
@@ -446,7 +446,7 @@
                 ret = dispatch_test( cnt, params );
 
 #if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
-                if( !option_verbose && restore_output( &stdout, stdout_fd ) )
+                if( !option_verbose && restore_output( stdout, stdout_fd ) )
                 {
                         /* Redirection has failed with no stdout so exit */
                         exit( 1 );
@@ -541,10 +541,5 @@
     mbedtls_memory_buffer_alloc_free();
 #endif
 
-#if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
-    if( stdout_fd != -1 )
-        close_output( stdout );
-#endif /* __unix__ || __APPLE__ __MACH__ */
-
     return( total_errors != 0 );
 }