[PATCH v2] provide Windows/MSVC lcore macros

[Tyler Retzlaff <roretzla@linux.microsoft.com>]

Provide MSVC compatible macros RTE_DEFINE_PER_LCORE and
RTE_DECLARE_PER_LCORE that expand appropriately for Windows/MSVC

NOTICE:

It is intentional that devtools/checkpatches.pl generates an error
about parenthesis to allow comparison with clang/gcc versions of
these macros which also do not have the parenthesis.

```
ERROR:COMPLEX_MACRO: Macros with complex values should be enclosed in parenthesis
#31: FILE: lib/eal/include/rte_per_lcore.h:42:
+#define RTE_DEFINE_PER_LCORE(type, name)                       \
+       __declspec(thread) typeof(type) per_lcore_##name

ERROR:COMPLEX_MACRO: Macros with complex values should be enclosed in parenthesis
#34: FILE: lib/eal/include/rte_per_lcore.h:45:
+#define RTE_DECLARE_PER_LCORE(type, name)                      \
+       extern __declspec(thread) typeof(type) per_lcore_##name
```

v2:
    * invert macro test for msvc #ifndef -> #ifdef

Tyler Retzlaff (1):
  eal: provide per lcore macros for MSVC

 lib/eal/include/rte_per_lcore.h | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

-- 
1.8.3.1