Avro-C: Header file calls out GCC atomic intrinsics, which are missing in some
GCC versions older than 4.5.0
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Key: AVRO-1038
URL: https://issues.apache.org/jira/browse/AVRO-1038
Project: Avro
Issue Type: Bug
Components: c
Affects Versions: 1.6.2
Environment: Linux on an x86 or x86-64 platform with GCC versions
between 4.1.0 and 4.5.0.
Two platforms we tested were:
1. GCC 4.1.2 20080704 (Red Hat 4.1.2-48)
2. GCC 4.4.3 on Mandriva for an i586 target
Reporter: Vivek Nadkarni
Fix For: 1.6.3
This issue was described as Item 2 in AVRO-1033. Splitting it out into a
separate JIRA ticket per Doug's request.
While compiling Avro across several flavors of
Linux, we noticed that the GCC atomic intrinsics
__sync_add_and_fetch() and __sync_sub_and_fetch() were not implemented
for all versions of GCC greater than 4.1.0, causing compile errors.
Specifically, the following two versions of GCC don't appear to
support the GCC atomic intrinsics:
1. GCC 4.1.2 20080704 (Red Hat 4.1.2-48)
2. GCC 4.4.3 on Mandriva for an i586 target
In our local code we have updated the GCC version test in refcount.h
to require versions of GCC greater than 4.5.0, before including the
GCC intrinsics. We might want to do the same in the global Avro
repository.
Cheers,
Vivek Nadkarni
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