Add code to return early in CMakeLists to prevent being included again.
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@ -1,4 +1,9 @@
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cmake_minimum_required(VERSION 2.7)
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if(TARGET lex)
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return()
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endif(TARGET lex)
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project(liblex)
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add_library(lex STATIC src/pattern.c src/pairmap.c src/eval.c)
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