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http://pkgs.fedoraproject.org/gitweb/?p=libvisual.git;a=tree
--- libvisual/lv_cpu.c
+++ libvisual/lv_cpu.c
@@ -50,8 +50,19 @@
#endif
#if defined(VISUAL_OS_LINUX)
+#if defined(VISUAL_ARCH_POWERPC)
+#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>
+#else /* VISUAL_ARCH_POWERPC */
#include <signal.h>
#endif
+#endif
#if defined(VISUAL_OS_WIN32)
#include <windows.h>
@@ -154,6 +165,46 @@ static void check_os_altivec_support( vo
if (err == 0)
if (has_vu != 0)
__lv_cpu_caps.hasAltiVec = 1;
+#elif defined (VISUAL_OS_LINUX)
+ static int available = -1;
+ int new_avail = 0;
+ char fname[64];
+ unsigned long buf[64];
+ ssize_t count;
+ pid_t pid;
+ int fd, i;
+
+ if (available != -1)
+ return;
+
+ pid = getpid();
+ snprintf(fname, sizeof(fname)-1, "/proc/%d/auxv", pid);
+
+ fd = open(fname, O_RDONLY);
+ if (fd < 0)
+ goto out;
+more:
+ count = read(fd, buf, sizeof(buf));
+ if (count < 0)
+ goto out_close;
+
+ for (i=0; i < (count / sizeof(unsigned long)); i += 2) {
+ if (buf[i] == AT_HWCAP) {
+ new_avail = !!(buf[i+1] & PPC_FEATURE_HAS_ALTIVEC);
+ goto out_close;
+ } else if (buf[i] == AT_NULL) {
+ goto out_close;
+ }
+ }
+
+ if (count == sizeof(buf))
+ goto more;
+out_close:
+ close(fd);
+out:
+ available = new_avail;
+ if (available)
+ __lv_cpu_caps.hasAltiVec = 1;
#else /* !VISUAL_OS_DARWIN */
/* no Darwin, do it the brute-force way */
/* this is borrowed from the libmpeg2 library */
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