<AWT Dev> splashscreen.so is missing pnggccrd.c

Martin Buchholz martinrb at google.com
Wed Aug 27 15:23:36 PDT 2008


Thanks for your patience; you were entirely right,
it was indeed necessary to define PNG_NO_MMX_CODE.
Since pnggccrd.c is never compiled, and it contains the MMX code,
the only correct thing appears to be to define this macro unconditionally.
The obvious patch follows (tested on 32-bit Ubuntu Linux with
very recent gcc toolchain)

(Has anyone actually tested png splashscreen images on 32 or 64-bit Linux?)

# HG changeset patch
# User martin
# Date 1219875308 25200
# Node ID 86b160e4bc1aae927aa71dfd712bb2365ebc0e1c
# Parent  1267605489211c6c162bb246f653759e933bd06e
6613927: Compilation of splashscreen png library failed on Ubuntu 7.04 (64bit)
Summary: Define -DPNG_NO_MMX_CODE unconditionally, not just on 64-bit Linux
Reviewed-by: anthony

diff --git a/make/sun/splashscreen/Makefile b/make/sun/splashscreen/Makefile
--- a/make/sun/splashscreen/Makefile
+++ b/make/sun/splashscreen/Makefile
@@ -85,13 +85,6 @@
 CPPFLAGS += -I$(PLATFORM_SRC)/native/$(PKGDIR)/splashscreen
 CPPFLAGS += -I$(SHARE_SRC)/native/$(PKGDIR)/image/jpeg

-ifeq ($(PLATFORM), linux)
-  ifeq ($(ARCH_DATA_MODEL), 64)
-    # 64-bit gcc has problems compiling MMX instructions.
-    # Google it for more details. Possibly the newer versions of
-    # the PNG-library and/or the new compiler will not need this
-    # option in the future.
-  endif
+# Shun the less than portable MMX assembly code in pnggccrd.c.
+# Newer versions of the PNG-library may not need this option.


On Wed, Aug 27, 2008 at 5:48 AM, Anthony Petrov <Anthony.Petrov at sun.com> wrote:
> Hi Martin,
> On 08/25/2008 08:17 PM Martin Buchholz wrote:
>> Thanks for the link, but...
>> - The fix for 6613927 is applied in my workspace
> And it gets activated when building on a 64-bit system only. Could you
> please take a look at the make/sun/splashscreen/Makefile file and make sure
> it defines the "CPPFLAGS += -DPNG_NO_MMX_CODE" in every case. It is really
> very interesting if this will resolve the issue. Thank you in advance.

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