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configure.ac: guard $CFLAGS with "" in tests
Fixes ./configure error: ../mc/configure: line 42709: test: too many arguments Signed-off-by: Sergei Trofimovich <slyfox@inbox.ru>
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@ -517,7 +517,7 @@ MC_CHECK_CFLAGS
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CFLAGS_OPTS=""
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if test x$CFLAGS = x; then
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if test "x$CFLAGS" = "x"; then
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CFLAGS_OPTS=" -O2 "
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fi
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