sntp/libopts/m4/libopts.m4: allow override shell with POSIX_SHELL
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Pull in fix from upstream AutoGen [1] to accept POSIX_SHELL from the
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environment during the configure step.
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[1] http://git.savannah.gnu.org/cgit/autogen.git/commit/?id=db064b9a252f3ef3d8db25411ea0edb0ff8ea758
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Signed-off-by: James Byrne <james.byrne@origamienergy.com>
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diff --git a/sntp/libopts/m4/libopts.m4 b/sntp/libopts/m4/libopts.m4
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--- a/sntp/libopts/m4/libopts.m4
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+++ b/sntp/libopts/m4/libopts.m4
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@@ -114,6 +114,7 @@
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AC_PROG_SED
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[while :
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do
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+ test -x "$POSIX_SHELL" && break
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POSIX_SHELL=`which bash`
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test -x "$POSIX_SHELL" && break
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POSIX_SHELL=`which dash`
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