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libev: add patch to fix build on SPARCv8

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Due to a mistake in a compile time conditional, SPARCv9 code was being
compiled in libev on a SPARCv8 system. A newly added patch fixes this,
which fixes the following build failure:

  http://autobuild.buildroot.net/results/55d6190b60a08c9bc4d659cf009df52388db676a/

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Thomas Petazzoni 2015-08-08 23:47:23 +02:00
parent c5e96d8935
commit bb9502a7e0
1 changed files with 29 additions and 0 deletions
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29
package/libev/0001-fix-sparcv8-condition.patch Normal file
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@ -0,0 +1,29 @@
Fix SPARCv8 condition
The define provided by the compiler on SPARCv8 is __sparc_v8__ and not
__sparcv8. From a SPARCv8 gcc:
$ sparc-linux-gcc --version
sparc-linux-gcc (Buildroot 2015.08-git-00497-ge110081) 4.9.3
[...]
$ sparc-linux-gcc -dM -E - < /dev/null | grep sparc
#define sparc 1
#define __sparc__ 1
#define __sparc 1
#define __sparc_v8__ 1
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Index: b/ev.c
===================================================================
--- a/ev.c
+++ b/ev.c
@@ -649,7 +649,7 @@
#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
#elif __aarch64__
#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
- #elif (__sparc || __sparc__) && !__sparcv8
+ #elif (__sparc || __sparc__) && !__sparc_v8__
#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")