http://llvm.org/bugs/show_bug.cgi?id=6711
Summary: atomic builtin test uses C compiler instead of C++
compiler
Product: new-bugs
Version: unspecified
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P
Component: new bugs
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
It uses the C compiler to do the test, and succeeds (atomic builtins
available).
At build time it fails to link with missing symbols for
__sync_val_compare_and_swap_4, because it uses the C++ compiler for linking
(and that is not what configure tested).
This happens if you build with CFLAGS != CXXFLAGS, and CFLAGS sets the target
architecture to something that supports atomic builtins, while CXXFLAGS stays
at the default (i386?) that doesn't support it.
See here for more details:
http://lurker.clamav.net/message/20100326.084547.051ffb52.en.html
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