fix Altivec detection

pixman-0.11.4-altivec.patch

@@ -0,0 +1,63 @@
+--- pixman-0.11.4/pixman/pixman-pict.c~	2008-06-09 06:56:34.000000000 +0100
++++ pixman-0.11.4/pixman/pixman-pict.c	2008-06-17 18:38:34.000000000 +0100
+@@ -1920,7 +1920,59 @@ pixman_bool_t pixman_have_vmx (void) {
+     return have_vmx;
+ }
+ 
+-#else
++#elif defined (__linux__)
++#include <sys/types.h>
++#include <sys/stat.h>
++#include <fcntl.h>
++#include <unistd.h>
++#include <stdio.h>
++#include <linux/auxvec.h>
++#include <asm/cputable.h>
++
++pixman_bool_t pixman_have_vmx (void)
++{
++    if (!initialized) {
++	char fname[64];
++	unsigned long buf[64];
++	ssize_t count = 0;
++	pid_t pid;
++	int fd, i;
++
++	pid = getpid();
++	snprintf(fname, sizeof(fname)-1, "/proc/%d/auxv", pid);
++
++	fd = open(fname, O_RDONLY);
++	if (fd >= 0) {
++	    for (i = 0; i <= (count / sizeof(unsigned long)); i += 2) {
++		/* Read more if buf is empty... */
++		if (i == (count / sizeof(unsigned long))) {
++		    count = read(fd, buf, sizeof(buf));
++		    if (count <= 0)
++			break;
++		    i = 0;
++		}
++		
++		if (buf[i] == AT_HWCAP) {
++		    have_vmx = !!(buf[i+1] & PPC_FEATURE_HAS_ALTIVEC);
++		    initialized = 1;
++		    break;
++		} else if (buf[i] == AT_NULL) {
++		    break;
++		}
++	    }
++	    close(fd);
++	}
++    }
++    if (!initialized) {
++	/* Something went wrong. Assume 'no' rather than playing 
++	   fragile tricks with catching SIGILL. */
++	have_vmx = FALSE;
++	initialized = 1;
++    }
++       
++    return have_vmx;
++}
++#else /* !__APPLE__ && !__linux__ */
+ #include <signal.h>
+ 
+ static void vmx_test(int sig, siginfo_t *si, void *unused) {

pixman.spec

@@ -3,7 +3,7 @@
 
 Name:           pixman
 Version:        0.11.4
-Release:        2%{?dist}
+Release:        3%{?dist}
 Summary:        Pixel manipulation library
 
 Group:          System Environment/Libraries
@@ -17,6 +17,7 @@ Source1:	make-pixman-snapshot.sh
 BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 
 Patch0:		leakfix.patch
+Patch1:		pixman-0.11.4-altivec.patch
 
 # BuildRequires:  automake autoconf libtool pkgconfig
 
@@ -35,6 +36,7 @@ Development library for pixman.
 %prep
 %setup -q
 %patch0 -p1 -b .leakfix
+%patch1 -p1 -b .altivec
 
 %build
 %configure --disable-static
@@ -64,6 +66,9 @@ rm -rf $RPM_BUILD_ROOT
 %{_libdir}/pkgconfig/pixman-1.pc
 
 %changelog
+* Tue Jun 17 2008 David Woodhouse <dwmw2@infradead.org> 0.11.4-3
+- Fix Altivec detection breakage (#451831)
+
 * Fri Jun 13 2008 Soren Sandmann <sandmann@redhat.com> 0.11.4-2
 - Plug bad leak (cherrypicked from master)