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llvm-mirror/test/Object/archive-update.test
Chandler Carruth c53cd157aa The archive update test has a subtle race condition in it: if the test
is executed within the same second as the inputs for the test are
checked out from the source tree, it will fail to update due to being
below the resolution of the 'mtime' test used.

Now, this may seem improbably to you... ok, maybe *really* improbable,
but consider a system which does distributed execution of tests by
shipping their inputs to another machine and runs them. That might cause
the mtime to be quite recent during the test run. ;]

Instead, create two files directly in the test (allowing all platforms
to see the problem) and add either a use of the 'touch' command that
forces one mtime to some time quite a bit in the past, or it sleeps for
just over a second to be outside of the precision window.

llvm-svn: 186282
2013-07-14 10:46:51 +00:00

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Test the 'u' option of llvm-ar
REQUIRES: shell
RUN: cd %T
RUN: rm -f %t.a
Create a file named evenlen that is newer than the evenlen on the source dir.
RUN: mkdir -p %t.older
RUN: echo older > %t.older/evenlen
Either the shell supports the 'touch' command with a flag to manually set the
mtime or we sleep for over a second so that the mtime is definitely observable.
RUN: touch -m -t 200001010000 %t.older/evenlen || sleep 1.1
RUN: mkdir -p %t.newer
RUN: echo newer > %t.newer/evenlen
RUN: touch %t.newer/evenlen
Create an achive with the newest file
RUN: llvm-ar r %t.a %t.newer/evenlen
RUN: llvm-ar p %t.a | FileCheck --check-prefix=NEWER %s
Check that without the 'u' option the member is replaced with an older file.
RUN: llvm-ar r %t.a %t.older/evenlen
RUN: llvm-ar p %t.a | FileCheck --check-prefix=OLDER %s
Check that with the 'u' option the member is replaced with a newer file.
RUN: llvm-ar ru %t.a %t.newer/evenlen
RUN: llvm-ar p %t.a | FileCheck --check-prefix=NEWER %s
Check that with the 'u' option the member is not replaced with an older file.
RUN: llvm-ar ru %t.a %t.older/evenlen
RUN: llvm-ar p %t.a | FileCheck --check-prefix=NEWER %s
NEWER: newer
OLDER: older