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INCLUDE (CheckCSourceRuns)
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(pcre2-8 pcre2_match_8 "" HAVE_PCRE2)
ENDIF()
IF(NOT HAVE_PCRE2 OR WITH_PCRE STREQUAL "bundled")
IF (WITH_PCRE STREQUAL "system")
MESSAGE(FATAL_ERROR "system pcre2-8 library is not found or unusable")
ENDIF()
SET(PCRE_INCLUDES ${CMAKE_BINARY_DIR}/pcre2 ${CMAKE_SOURCE_DIR}/pcre2
${CMAKE_BINARY_DIR}/pcre2/src ${CMAKE_SOURCE_DIR}/pcre2/src)
SET(PCRE2_BUILD_TESTS OFF CACHE BOOL "Disable tests.")
SET(PCRE2_BUILD_PCRE2GREP OFF CACHE BOOL "Disable pcre2grep")
ADD_SUBDIRECTORY(pcre2)
ENDIF()
ENDMACRO()
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