1 files changed, 94 insertions, 0 deletions
diff --git a/cmake/pcre.cmake b/cmake/pcre.cmake
new file mode 100644
index 00000000..65dc2ae2
--- /dev/null
+++ b/cmake/pcre.cmake
@@ -0,0 +1,94 @@
+INCLUDE (CheckCSourceRuns)
+INCLUDE (ExternalProject)
+
+SET(WITH_PCRE "auto" CACHE STRING
+   "Which pcre to use (possible values are 'bundled', 'system', or 'auto')")
+
+MACRO(BUNDLE_PCRE2)
+  SET(dir "${CMAKE_BINARY_DIR}/extra/pcre2")
+  SET(PCRE_INCLUDES ${dir}/src/pcre2-build ${dir}/src/pcre2/src)
+  SET(byproducts)
+  FOREACH(lib pcre2-posix pcre2-8)
+    ADD_LIBRARY(${lib} STATIC IMPORTED GLOBAL)
+    ADD_DEPENDENCIES(${lib} pcre2)
+
+    GET_PROPERTY(MULTICONFIG GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+    IF(MULTICONFIG)
+      SET(intdir "${CMAKE_CFG_INTDIR}/")
+    ELSE()
+      SET(intdir)
+    ENDIF()
+
+    # PCRE names static libraries differently depending on platform.
+    # On Windows, but not elsewhere, it adds "-static" to the library name,
+    # or "-staticd".
+    IF(WIN32)
+      SET(PCRE_STATIC "-static")
+    ELSE()
+      SET(PCRE_STATIC "")
+    ENDIF()
+
+    SET(file ${dir}/src/pcre2-build/${intdir}${CMAKE_STATIC_LIBRARY_PREFIX}${lib}${PCRE_STATIC}${CMAKE_STATIC_LIBRARY_SUFFIX})
+
+    IF(WIN32)
+      # Debug libary name.
+      # Same condition as in pcre2 CMakeLists.txt that adds "d"
+      SET(file_d ${dir}/src/pcre2-build/${intdir}${CMAKE_STATIC_LIBRARY_PREFIX}${lib}${PCRE_STATIC}d${CMAKE_STATIC_LIBRARY_SUFFIX})
+      SET_TARGET_PROPERTIES(${lib} PROPERTIES IMPORTED_LOCATION_DEBUG ${file_d})
+    ELSE()
+      SET(file_d)
+    ENDIF()
+    SET(byproducts ${byproducts} BUILD_BYPRODUCTS ${file} ${file_d})
+    SET_TARGET_PROPERTIES(${lib} PROPERTIES IMPORTED_LOCATION ${file})
+  ENDFOREACH()
+  FOREACH(v "" "_DEBUG" "_RELWITHDEBINFO" "_RELEASE" "_MINSIZEREL")
+    STRING(REPLACE "/WX" "" pcre2_flags${v} "${CMAKE_C_FLAGS${v}}")
+    SET(pcre2_flags${v} "${pcre2_flags${v}} -std=c99 ")
+    IF(MSVC)
+      # Suppress a warning
+      STRING(APPEND pcre2_flags${v} " /wd4244 " )
+      # Disable asan support
+      STRING(REPLACE "-fsanitize=address" "" pcre2_flags${v} "${CMAKE_C_FLAGS${v}}")
+    ENDIF()
+  ENDFOREACH()
+  ExternalProject_Add(
+    pcre2
+    PREFIX   "${dir}"
+    URL "https://github.com/PCRE2Project/pcre2/releases/download/pcre2-10.42/pcre2-10.42.zip"
+    URL_MD5 fe90992fbfb03f854bd9f344074f49eb
+    INSTALL_COMMAND ""
+    CMAKE_ARGS
+      "-DCMAKE_WARN_DEPRECATED=FALSE"
+      "-DPCRE2_BUILD_TESTS=OFF"
+      "-DPCRE2_BUILD_PCRE2GREP=OFF"
+      "-DBUILD_SHARED_LIBS=OFF"
+      "-DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}"
+      "-DCMAKE_C_FLAGS=${pcre2_flags} ${PIC_FLAG}"
+      "-DCMAKE_C_FLAGS_DEBUG=${pcre2_flags_DEBUG}"
+      "-DCMAKE_C_FLAGS_RELWITHDEBINFO=${pcre2_flags_RELWITHDEBINFO}"
+      "-DCMAKE_C_FLAGS_RELEASE=${pcre2_flags_RELEASE}"
+      "-DCMAKE_C_FLAGS_MINSIZEREL=${pcre2_flags_MINSIZEREL}"
+      "-DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}"
+      ${stdlibs}
+      ${byproducts}
+  )
+SET_TARGET_PROPERTIES(pcre2 PROPERTIES EXCLUDE_FROM_ALL TRUE)
+ENDMACRO()
+
+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()
+    BUNDLE_PCRE2()
+  ELSE()
+    CHECK_LIBRARY_EXISTS(pcre2-posix PCRE2regcomp "" NEEDS_PCRE2_DEBIAN_HACK)
+    IF(NEEDS_PCRE2_DEBIAN_HACK)
+      SET(PCRE2_DEBIAN_HACK "-Dregcomp=PCRE2regcomp -Dregexec=PCRE2regexec -Dregerror=PCRE2regerror -Dregfree=PCRE2regfree")
+    ENDIF()
+  ENDIF()
+ENDMACRO()
+