[Mesa-dev] [PATCH 4/7] svga: Limit svga message capability to newer compilers

[Brian Paul]

From: Sinclair Yeh <syeh at vmware.com>

The assembly code used by the SVGA message feature doesn't
build properly with older compilers, so limit it to only
gcc 5.3.0 and newer.

Also modified the stubs to avoid "unused variable" warnings.

Reviewed-by: Charmaine Lee <charmainel at vmware.com>
Reviewed-by: Brian Paul <brianp at vmware.com>
---
 src/gallium/drivers/svga/svga_msg.c | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/src/gallium/drivers/svga/svga_msg.c b/src/gallium/drivers/svga/svga_msg.c
index 3bbe89f..e3f72b6 100755
--- a/src/gallium/drivers/svga/svga_msg.c
+++ b/src/gallium/drivers/svga/svga_msg.c
@@ -57,7 +57,7 @@
 #define HIGH_WORD(X) ((X & 0xFFFF0000) >> 16)
 
 
-#if defined(PIPE_CC_GCC)
+#if defined(PIPE_CC_GCC) && (PIPE_CC_GCC_VERSION > 502)
 
 /**
  * Hypervisor-specific bi-directional communication channel.  Should never
@@ -241,15 +241,25 @@ typedef uint32_t VMW_REG;
 
 #define VMW_PORT(cmd, in_bx, in_si, in_di, \
          port_num, magic,                  \
-         ax, bx, cx, dx, si, di)
+         ax, bx, cx, dx, si, di)           \
+         (void) in_bx;                     \
+         (void) ax; (void) bx; (void) cx;  \
+         (void) dx; (void) si; (void) di;
 
 #define VMW_PORT_HB_OUT(cmd, in_cx, in_si, in_di, \
          port_num, magic, bp,                     \
-         ax, bx, cx, dx, si, di)
+         ax, bx, cx, dx, si, di)                  \
+         (void) in_cx; (void) bp;                 \
+         (void) ax; (void) bx; (void) cx;         \
+         (void) dx; (void) si; (void) di;
+			
 
 #define VMW_PORT_HB_IN(cmd, in_cx, in_si, in_di,  \
          port_num, magic, bp,                     \
-         ax, bx, cx, dx, si, di)
+         ax, bx, cx, dx, si, di)                  \
+         (void) bp;                               \
+         (void) ax; (void) bx; (void) cx;         \
+         (void) dx; (void) si; (void) di;
 
 #endif /* #if PIPE_CC_GCC */
 
-- 
1.9.1