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m4: import patch from OpenBSD

Description

m4: import patch from OpenBSD

Use waitpid()/EINTR idiom for the specific pid, rather than generic wait()

Patch by: deraadt@

Obtained from: OpenBSD

Details

Provenance
baptAuthored on
Parents
rS352066: Import from OpenBSD a patch which eliminates the link with -ly or -ly
Branches
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Tags
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