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SET(WITH_PCRE "auto" CACHE STRING
"Which pcre to use (possible values are 'bundled', 'system', or 'auto')")
MACRO (CHECK_PCRE)
IF(WITH_PCRE STREQUAL "system" OR WITH_PCRE STREQUAL "auto")
CHECK_LIBRARY_EXISTS(pcre pcre_stack_guard "" HAVE_PCRE)
ENDIF()
IF(NOT HAVE_PCRE OR WITH_PCRE STREQUAL "bundled")
IF (WITH_PCRE STREQUAL "system")
MESSAGE(FATAL_ERROR "system pcre is not found or unusable")
ENDIF()
SET(PCRE_INCLUDES ${CMAKE_BINARY_DIR}/pcre ${CMAKE_SOURCE_DIR}/pcre)
ADD_SUBDIRECTORY(pcre)
ENDIF()
ENDMACRO()
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