MDEV-33091 pcre2 headers aren't found on Solaris

use pkg-config to find pcre2, if possible

rename PCRE_INCLUDES to use PKG_CHECK_MODULES naming, PCRE_INCLUDE_DIRS

client/CMakeLists.txt

@@ -16,7 +16,7 @@
 
 INCLUDE_DIRECTORIES(
   ${CMAKE_SOURCE_DIR}/include
-  ${PCRE_INCLUDES}
+  ${PCRE_INCLUDE_DIRS}
   ${CMAKE_SOURCE_DIR}/mysys_ssl
   ${ZLIB_INCLUDE_DIR}
   ${SSL_INCLUDE_DIRS}

cmake/pcre.cmake

-INCLUDE (CheckCSourceRuns)
 INCLUDE (ExternalProject)
 
 SET(WITH_PCRE "auto" CACHE STRING
@@ -6,7 +5,8 @@ SET(WITH_PCRE "auto" CACHE STRING
 
 MACRO(BUNDLE_PCRE2)
   SET(dir "${CMAKE_BINARY_DIR}/extra/pcre2")
-  SET(PCRE_INCLUDES ${dir}/src/pcre2-build ${dir}/src/pcre2/src)
+  SET(PCRE_INCLUDE_DIRS ${dir}/src/pcre2-build ${dir}/src/pcre2/src)
+  MESSAGE(STATUS "Will download and bundle pcre2")
   SET(byproducts)
   FOREACH(lib pcre2-posix pcre2-8)
     ADD_LIBRARY(${lib} STATIC IMPORTED GLOBAL)
@@ -76,18 +76,26 @@ 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")
+  IF (NOT TARGET pcre2 AND NOT PCRE_FOUND)
+    IF(WITH_PCRE STREQUAL "system" OR WITH_PCRE STREQUAL "auto")
+      FIND_PACKAGE(PkgConfig QUIET)
+      PKG_CHECK_MODULES(PCRE libpcre2-8)
+      # in case pkg-config or libpcre2-8.pc is not installed:
+      IF(NOT PCRE_FOUND)
+        UNSET(PCRE_FOUND CACHE)
+        CHECK_LIBRARY_EXISTS(pcre2-8 pcre2_match_8 "" PCRE_FOUND)
+      ENDIF()
     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")
+    IF(NOT PCRE_FOUND 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()
   ENDIF()
 ENDMACRO()

cmake/plugin.cmake

@@ -44,7 +44,7 @@ MACRO(MYSQL_ADD_PLUGIN)
   # Add common include directories
   INCLUDE_DIRECTORIES(${CMAKE_SOURCE_DIR}/include 
                     ${CMAKE_SOURCE_DIR}/sql
-                    ${PCRE_INCLUDES}
+                    ${PCRE_INCLUDE_DIRS}
                     ${SSL_INCLUDE_DIRS}
                     ${ZLIB_INCLUDE_DIR})
 

extra/mariabackup/CMakeLists.txt

@@ -36,7 +36,7 @@ INCLUDE_DIRECTORIES(
   )
 
 IF(NOT HAVE_SYSTEM_REGEX)
-  INCLUDE_DIRECTORIES(${PCRE_INCLUDES})
+  INCLUDE_DIRECTORIES(${PCRE_INCLUDE_DIRS})
   ADD_DEFINITIONS(${PCRE2_DEBIAN_HACK})
 ENDIF()
 

libmysqld/CMakeLists.txt

@@ -23,7 +23,7 @@ ${CMAKE_SOURCE_DIR}/libmysqld
 ${CMAKE_SOURCE_DIR}/sql
 ${CMAKE_SOURCE_DIR}/tpool
 ${CMAKE_BINARY_DIR}/sql 
-${PCRE_INCLUDES}
+${PCRE_INCLUDE_DIRS}
 ${ZLIB_INCLUDE_DIR}
 ${SSL_INCLUDE_DIRS}
 ${SSL_INTERNAL_INCLUDE_DIRS}

libmysqld/examples/CMakeLists.txt

@@ -15,7 +15,7 @@
 
 INCLUDE_DIRECTORIES(${CMAKE_SOURCE_DIR}/include
                     ${CMAKE_SOURCE_DIR}/libmysqld/include
-                    ${PCRE_INCLUDES}
+                    ${PCRE_INCLUDE_DIRS}
                     ${CMAKE_SOURCE_DIR}/sql
                     ${MY_READLINE_INCLUDE_DIR}
                     )

plugin/feedback/CMakeLists.txt

 INCLUDE_DIRECTORIES(${CMAKE_SOURCE_DIR}/sql
-                    ${PCRE_INCLUDES}
+                    ${PCRE_INCLUDE_DIRS}
                     ${SSL_INCLUDE_DIRS})
 
 SET(FEEDBACK_SOURCES feedback.cc sender_thread.cc

plugin/qc_info/CMakeLists.txt

 INCLUDE_DIRECTORIES(${CMAKE_SOURCE_DIR}/sql
-                    ${PCRE_INCLUDES})
+                    ${PCRE_INCLUDE_DIRS})
 
 MYSQL_ADD_PLUGIN(QUERY_CACHE_INFO qc_info.cc RECOMPILE_FOR_EMBEDDED)

sql/CMakeLists.txt

@@ -52,7 +52,7 @@ ENDIF()
 INCLUDE_DIRECTORIES(
 ${CMAKE_SOURCE_DIR}/include
 ${CMAKE_SOURCE_DIR}/sql
-${PCRE_INCLUDES}
+${PCRE_INCLUDE_DIRS}
 ${ZLIB_INCLUDE_DIR}
 ${SSL_INCLUDE_DIRS}
 ${CMAKE_BINARY_DIR}/sql

storage/perfschema/CMakeLists.txt

@@ -24,7 +24,7 @@ INCLUDE_DIRECTORIES(${CMAKE_SOURCE_DIR}/include
                     ${CMAKE_SOURCE_DIR}/sql
                     ${CMAKE_BINARY_DIR}/sql
                     ${CMAKE_CURRENT_BINARY_DIR}
-                    ${PCRE_INCLUDES}
+                    ${PCRE_INCLUDE_DIRS}
                     ${SSL_INCLUDE_DIRS})
 
 ADD_DEFINITIONS(-DMYSQL_SERVER)

storage/perfschema/unittest/CMakeLists.txt

@@ -22,7 +22,7 @@
 
 INCLUDE_DIRECTORIES(${CMAKE_SOURCE_DIR}/include
                     ${CMAKE_SOURCE_DIR}/include/mysql
-                    ${PCRE_INCLUDES}
+                    ${PCRE_INCLUDE_DIRS}
                     ${CMAKE_SOURCE_DIR}/sql
                     ${SSL_INCLUDE_DIRS}
                     ${CMAKE_SOURCE_DIR}/unittest/mytap

unittest/embedded/CMakeLists.txt

 
 INCLUDE_DIRECTORIES(${CMAKE_SOURCE_DIR}/include
                     ${CMAKE_SOURCE_DIR}/libmysqld/include
-                    ${PCRE_INCLUDES}
+                    ${PCRE_INCLUDE_DIRS}
                     ${CMAKE_SOURCE_DIR}/sql
                     ${MY_READLINE_INCLUDE_DIR}
                     )