Add target_include_directories to CMakefile (#113)

To tell clients where to find the public include directory,
and attach it to the various library targets.

CMakeLists.txt

@@ -703,6 +703,7 @@ IF(PCRE2_BUILD_PCRE2_8)
       VERSION ${LIBPCRE2_8_VERSION}
       SOVERSION ${LIBPCRE2_8_SOVERSION})
     TARGET_COMPILE_DEFINITIONS(pcre2-8-static PUBLIC PCRE2_STATIC)
+    TARGET_INCLUDE_DIRECTORIES(pcre2-8-static PUBLIC ${PROJECT_BINARY_DIR})
     IF(REQUIRE_PTHREAD)
         TARGET_LINK_LIBRARIES(pcre2-8-static Threads::Threads)
     ENDIF(REQUIRE_PTHREAD)
@@ -716,6 +717,7 @@ IF(PCRE2_BUILD_PCRE2_8)
       SOVERSION ${LIBPCRE2_POSIX_SOVERSION})
     TARGET_LINK_LIBRARIES(pcre2-posix-static pcre2-8-static)
     TARGET_COMPILE_DEFINITIONS(pcre2-posix-static PUBLIC PCRE2_STATIC)
+    TARGET_INCLUDE_DIRECTORIES(pcre2-posix-static PUBLIC ${PROJECT_BINARY_DIR})
     SET(targets ${targets} pcre2-posix-static)
 
     IF(MSVC)
@@ -732,6 +734,7 @@ IF(PCRE2_BUILD_PCRE2_8)
 
   IF(BUILD_SHARED_LIBS)
     ADD_LIBRARY(pcre2-8-shared SHARED ${PCRE2_HEADERS} ${PCRE2_SOURCES} ${PROJECT_BINARY_DIR}/config.h)
+    TARGET_INCLUDE_DIRECTORIES(pcre2-8-shared PUBLIC ${PROJECT_BINARY_DIR})
     SET_TARGET_PROPERTIES(pcre2-8-shared PROPERTIES
       COMPILE_DEFINITIONS PCRE2_CODE_UNIT_WIDTH=8
       MACHO_COMPATIBILITY_VERSION "${LIBPCRE2_8_MACHO_COMPATIBILITY_VERSION}"
@@ -744,6 +747,7 @@ IF(PCRE2_BUILD_PCRE2_8)
     ENDIF(REQUIRE_PTHREAD)
     SET(targets ${targets} pcre2-8-shared)
     ADD_LIBRARY(pcre2-posix-shared SHARED ${PCRE2POSIX_HEADERS} ${PCRE2POSIX_SOURCES})
+    TARGET_INCLUDE_DIRECTORIES(pcre2-posix-shared PUBLIC ${PROJECT_BINARY_DIR})
     SET_TARGET_PROPERTIES(pcre2-posix-shared PROPERTIES
       COMPILE_DEFINITIONS PCRE2_CODE_UNIT_WIDTH=8
       MACHO_COMPATIBILITY_VERSION "${LIBPCRE2_POSIX_MACHO_COMPATIBILITY_VERSION}"
@@ -778,6 +782,7 @@ ENDIF(PCRE2_BUILD_PCRE2_8)
 IF(PCRE2_BUILD_PCRE2_16)
   IF(BUILD_STATIC_LIBS)
     ADD_LIBRARY(pcre2-16-static STATIC ${PCRE2_HEADERS} ${PCRE2_SOURCES} ${PROJECT_BINARY_DIR}/config.h)
+    TARGET_INCLUDE_DIRECTORIES(pcre2-16-static PUBLIC ${PROJECT_BINARY_DIR})
     SET_TARGET_PROPERTIES(pcre2-16-static PROPERTIES
       COMPILE_DEFINITIONS PCRE2_CODE_UNIT_WIDTH=16
       MACHO_COMPATIBILITY_VERSION "${LIBPCRE2_32_MACHO_COMPATIBILITY_VERSION}"
@@ -802,6 +807,7 @@ IF(PCRE2_BUILD_PCRE2_16)
 
   IF(BUILD_SHARED_LIBS)
     ADD_LIBRARY(pcre2-16-shared SHARED ${PCRE2_HEADERS} ${PCRE2_SOURCES} ${PROJECT_BINARY_DIR}/config.h)
+    TARGET_INCLUDE_DIRECTORIES(pcre2-16-shared PUBLIC ${PROJECT_BINARY_DIR})
     SET_TARGET_PROPERTIES(pcre2-16-shared PROPERTIES
       COMPILE_DEFINITIONS PCRE2_CODE_UNIT_WIDTH=16
       MACHO_COMPATIBILITY_VERSION "${LIBPCRE2_32_MACHO_COMPATIBILITY_VERSION}"
@@ -836,6 +842,7 @@ ENDIF(PCRE2_BUILD_PCRE2_16)
 IF(PCRE2_BUILD_PCRE2_32)
   IF(BUILD_STATIC_LIBS)
     ADD_LIBRARY(pcre2-32-static STATIC ${PCRE2_HEADERS} ${PCRE2_SOURCES} ${PROJECT_BINARY_DIR}/config.h)
+    TARGET_INCLUDE_DIRECTORIES(pcre2-32-static PUBLIC ${PROJECT_BINARY_DIR})
     SET_TARGET_PROPERTIES(pcre2-32-static PROPERTIES
       COMPILE_DEFINITIONS PCRE2_CODE_UNIT_WIDTH=32
       MACHO_COMPATIBILITY_VERSION "${LIBPCRE2_32_MACHO_COMPATIBILITY_VERSION}"
@@ -860,6 +867,7 @@ IF(PCRE2_BUILD_PCRE2_32)
 
   IF(BUILD_SHARED_LIBS)
     ADD_LIBRARY(pcre2-32-shared SHARED ${PCRE2_HEADERS} ${PCRE2_SOURCES} ${PROJECT_BINARY_DIR}/config.h)
+    TARGET_INCLUDE_DIRECTORIES(pcre2-32-shared PUBLIC ${PROJECT_BINARY_DIR})
     SET_TARGET_PROPERTIES(pcre2-32-shared PROPERTIES
       COMPILE_DEFINITIONS PCRE2_CODE_UNIT_WIDTH=32
       MACHO_COMPATIBILITY_VERSION "${LIBPCRE2_32_MACHO_COMPATIBILITY_VERSION}"