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Debian is apparently offended that pcre2-posix implements POSIX API, thus it renames all posix-compatible symbols in libpcre2-posix to have the PCRE2 prefix. But Debian doesn't do anything to pcre2posix.h header, so any unaware application will get POSIX compatible type names and function prototypes from pcre2, but actual symbols will come from libc. To remedy this enormous incongruity we have to redefine POSIX-compatible function names in pcre2posix to match Debian's hack.
72 lines
2.7 KiB
CMake
72 lines
2.7 KiB
CMake
INCLUDE (CheckCSourceRuns)
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INCLUDE (ExternalProject)
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SET(WITH_PCRE "auto" CACHE STRING
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"Which pcre to use (possible values are 'bundled', 'system', or 'auto')")
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MACRO(BUNDLE_PCRE2)
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SET(dir "${CMAKE_BINARY_DIR}/extra/pcre2")
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SET(PCRE_INCLUDES ${dir}/src/pcre2-build ${dir}/src/pcre2/src)
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SET(byproducts)
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FOREACH(lib pcre2-posix pcre2-8)
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ADD_LIBRARY(${lib} STATIC IMPORTED GLOBAL)
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ADD_DEPENDENCIES(${lib} pcre2)
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SET(file ${dir}/src/pcre2-build/${CMAKE_CFG_INTDIR}/${CMAKE_STATIC_LIBRARY_PREFIX}${lib}${CMAKE_STATIC_LIBRARY_SUFFIX})
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IF(WIN32)
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# Debug libary name.
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# Same condition as in pcre2 CMakeLists.txt that adds "d"
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SET(file_d ${dir}/src/pcre2-build/${CMAKE_CFG_INTDIR}/${CMAKE_STATIC_LIBRARY_PREFIX}${lib}d${CMAKE_STATIC_LIBRARY_SUFFIX})
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SET_TARGET_PROPERTIES(${lib} PROPERTIES IMPORTED_LOCATION_DEBUG ${file_d})
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ELSE()
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SET(file_d)
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ENDIF()
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SET(byproducts ${byproducts} BUILD_BYPRODUCTS ${file} ${file_d})
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SET_TARGET_PROPERTIES(${lib} PROPERTIES IMPORTED_LOCATION ${file})
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ENDFOREACH()
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FOREACH(v "" "_DEBUG" "_RELWITHDEBINFO" "_RELEASE" "_MINZISEREL")
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STRING(REPLACE "/WX" "" pcre2_flags${v} "${CMAKE_C_FLAGS${v}}")
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IF(MSVC)
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# Suppress a warning
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STRING(APPEND pcre2_flags${v} " /wd4244 " )
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ENDIF()
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ENDFOREACH()
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ExternalProject_Add(
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pcre2
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PREFIX "${dir}"
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URL "https://ftp.pcre.org/pub/pcre/pcre2-10.34.zip"
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URL_MD5 fdb10dba7f3be43730966bebdd3755ef
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INSTALL_COMMAND ""
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CMAKE_ARGS
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"-DPCRE2_BUILD_TESTS=OFF"
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"-DPCRE2_BUILD_PCRE2GREP=OFF"
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"-DBUILD_SHARED_LIBS=OFF"
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"-DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}"
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"-DCMAKE_C_FLAGS=${pcre2_flags} ${PIC_FLAG}"
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"-DCMAKE_C_FLAGS_DEBUG=${pcre2_flags_DEBUG}"
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"-DCMAKE_C_FLAGS_RELWITHDEBINFO=${pcre2_flags_RELWITHDEBINFO}"
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"-DCMAKE_C_FLAGS_RELEASE=${pcre2_flags_RELEASE}"
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"-DCMAKE_C_FLAGS_MINSIZEREL=${pcre2_flags_MINSIZEREL}"
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"-DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}"
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${byproducts}
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)
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SET_TARGET_PROPERTIES(pcre2 PROPERTIES EXCLUDE_FROM_ALL TRUE)
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ENDMACRO()
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MACRO (CHECK_PCRE)
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IF(WITH_PCRE STREQUAL "system" OR WITH_PCRE STREQUAL "auto")
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CHECK_LIBRARY_EXISTS(pcre2-8 pcre2_match_8 "" HAVE_PCRE2)
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ENDIF()
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IF(NOT HAVE_PCRE2 OR WITH_PCRE STREQUAL "bundled")
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IF (WITH_PCRE STREQUAL "system")
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MESSAGE(FATAL_ERROR "system pcre2-8 library is not found or unusable")
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ENDIF()
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BUNDLE_PCRE2()
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ELSE()
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CHECK_LIBRARY_EXISTS(pcre2-posix PCRE2regcomp "" NEEDS_PCRE2_DEBIAN_HACK)
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IF(NEEDS_PCRE2_DEBIAN_HACK)
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SET(PCRE2_DEBIAN_HACK "-Dregcomp=PCRE2regcomp -Dregexec=PCRE2regexec -Dregerror=PCRE2regerror -Dregfree=PCRE2regfree")
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ENDIF()
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ENDIF()
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ENDMACRO()
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