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These changes are required to correctly detect epoll support with XL compilers.

References PR #2788 and PR #2792 from master

 * The AC_LANG_PROGRAM macro adds the `main()` so it is erroneous
   to add it to the test program.
 * This was detected with the XL compilers which will fail to
   build the program in this situation. The GNU compiler does not
   error out or warn, but successfully compiles the program.

Signed-off-by: Joshua Hursey <jhursey@us.ibm.com>
(cherry picked from commit 029964a)
Signed-off-by: Joshua Hursey <jhursey@us.ibm.com>
 * Similar to commit open-mpi@029964a
   This removes an extra `int main` during configure.

Signed-off-by: Joshua Hursey <jhursey@us.ibm.com>
(cherry picked from commit 72ac812)
Signed-off-by: Joshua Hursey <jhursey@us.ibm.com>
@jjhursey jjhursey added the bug label Jan 24, 2017
@jjhursey jjhursey added this to the v1.10.6 milestone Jan 24, 2017
@jjhursey jjhursey requested a review from rhc54 January 24, 2017 14:37
@jjhursey jjhursey modified the milestones: v2.0.2, v1.10.6 Jan 24, 2017
@jsquyres jsquyres merged commit f9d80fa into open-mpi:v2.0.x Jan 24, 2017
@jjhursey jjhursey deleted the fix/v2.0.x/libevent-conf branch January 26, 2017 20:53
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5 participants