icedtea6-native: fix native-vsyscall failing

On a Fedora 20 build machine icedtea6-native fails with:
x86_64-linux/icedtea6-native/1.8.11-r5.3/icedtea6-1.8.11/openjdk-ecj/hotspot/src/os/linux/vm/os_linux.cpp:2431:60: error: expression cannot be used as a function
    vgetcpu_t vgetcpu = (vgetcpu_t)VSYSCALL_ADDR(__NR_vgetcpu);
                                                             ^
 make[7]: *** [os_linux.o] Error 1

The patch makes the build succeed. (On an openSUSE 13.1 machine the build succeeds with and without the patch)

2 files changed, 45 insertions, 0 deletions

diff --git a/recipes-core/icedtea/icedtea6-native-1.8.11/icedtea-native-vsyscall.patch b/recipes-core/icedtea/icedtea6-native-1.8.11/icedtea-native-vsyscall.patch
new file mode 100644
index 0000000..936b211
--- /dev/null
+++ b/recipes-core/icedtea/icedtea6-native-1.8.11/icedtea-native-vsyscall.patch
@@ -0,0 +1,43 @@
+Fixes the following compile time error when compiling icedtea6-native-1.8.11-r5.3 on a Fedora 20, x86_64:
+os_linux.cpp: In function 'int sched_getcpu_syscall()':
+os_linux.cpp:2431:60: error: expression cannot be used as a function
+   vgetcpu_t vgetcpu = (vgetcpu_t)VSYSCALL_ADDR(__NR_vgetcpu);
+
+Fix taken from:
+http://hg.openjdk.java.net/jdk6/jdk6/hotspot/rev/9447b2fb6fcf
+
+Signed-off-by: Max Krummenacher <max.oss.09@gmail.com>
+
+--- openjdk/hotspot/src/os/linux/vm/os_linux.cpp.orig   2014-10-15 14:57:39.681794315 +0200
++++ openjdk/hotspot/src/os/linux/vm/os_linux.cpp        2014-10-15 15:41:32.398109645 +0200
+@@ -54,10 +54,6 @@
+ # include <sys/shm.h>
+ # include <link.h>
+ 
+-#if __x86_64__
+-#include <asm/vsyscall.h>
+-#endif
+-
+ #define MAX_PATH    (2 * K)
+ 
+ // for timer info max values which include all bits
+@@ -2427,10 +2423,19 @@
+   int retval = -1;
+ 
+ #if __x86_64__
++// Unfortunately we have to bring all these macros here from vsyscall.h
++// to be able to compile on old linuxes.
++# define __NR_vgetcpu 2
++# define VSYSCALL_START (-10UL << 20)
++# define VSYSCALL_SIZE 1024
++# define VSYSCALL_ADDR(vsyscall_nr) (VSYSCALL_START+VSYSCALL_SIZE*(vsyscall_nr))
+   typedef long (*vgetcpu_t)(unsigned int *cpu, unsigned int *node, unsigned long *tcache);
+   vgetcpu_t vgetcpu = (vgetcpu_t)VSYSCALL_ADDR(__NR_vgetcpu);
+   retval = vgetcpu(&cpu, NULL, NULL);
+ #elif __i386__
++# ifndef SYS_getcpu
++# define SYS_getcpu 318
++# endif
+   retval = syscall(SYS_getcpu, &cpu, NULL, NULL);
+ #endif
+ 
diff --git a/recipes-core/icedtea/icedtea6-native_1.8.11.bb b/recipes-core/icedtea/icedtea6-native_1.8.11.bb
index 8ed3559..f0709f4 100644
--- a/recipes-core/icedtea/icedtea6-native_1.8.11.bb
+++ b/recipes-core/icedtea/icedtea6-native_1.8.11.bb
@@ -47,6 +47,7 @@ ICEDTEA_PATCHES = "\
         file://icedtea-unbreak-float.patch;apply=no \
         file://icedtea-jdk-avoid-cdef-collision.patch;apply=no \
         file://icedtea-hotspot-dont-return-booleans.patch;apply=no \
+        file://icedtea-native-vsyscall.patch;apply=no \
         "
 
 export DISTRIBUTION_PATCHES = "\
@@ -58,6 +59,7 @@ export DISTRIBUTION_PATCHES = "\
         patches/icedtea-unbreak-float.patch \
         patches/icedtea-jdk-avoid-cdef-collision.patch \
         patches/icedtea-hotspot-dont-return-booleans.patch \
+        patches/icedtea-native-vsyscall.patch \
         "
 
 EXTRA_OECONF += " --with-jaxws-drop-zip=${DL_DIR}/jdk6-jaxws-2009_10_27.zip \