cmake: add libpsl support

Fixes #8865
Closes #8867

CMake/FindLibPSL.cmake

@@ -0,0 +1,43 @@
+#***************************************************************************
+#                                  _   _ ____  _
+#  Project                     ___| | | |  _ \| |
+#                             / __| | | | |_) | |
+#                            | (__| |_| |  _ <| |___
+#                             \___|\___/|_| \_\_____|
+#
+# Copyright (C) 1998 - 2022, Daniel Stenberg, <daniel@haxx.se>, et al.
+#
+# This software is licensed as described in the file COPYING, which
+# you should have received as part of this distribution. The terms
+# are also available at https://curl.se/docs/copyright.html.
+#
+# You may opt to use, copy, modify, merge, publish, distribute and/or sell
+# copies of the Software, and permit persons to whom the Software is
+# furnished to do so, under the terms of the COPYING file.
+#
+# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+# KIND, either express or implied.
+#
+###########################################################################
+# - Try to find the libpsl library
+# Once done this will define
+#
+# LIBPSL_FOUND - system has the libpsl library
+# LIBPSL_INCLUDE_DIR - the libpsl include directory
+# LIBPSL_LIBRARY - the libpsl library name
+
+find_path(LIBPSL_INCLUDE_DIR libpsl.h)
+
+find_library(LIBPSL_LIBRARY NAMES psl libpsl)
+
+if(LIBPSL_INCLUDE_DIR)
+  file(STRINGS "${LIBPSL_INCLUDE_DIR}/libpsl.h" libpsl_version_str REGEX "^#define[\t ]+PSL_VERSION[\t ]+\"(.*)\"")
+  string(REGEX REPLACE "^.*\"([^\"]+)\"" "\\1"  LIBPSL_VERSION "${libpsl_version_str}")
+endif()
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(LibPSL
+    REQUIRED_VARS LIBPSL_LIBRARY LIBPSL_INCLUDE_DIR
+    VERSION_VAR LIBPSL_VERSION)
+
+mark_as_advanced(LIBPSL_INCLUDE_DIR LIBPSL_LIBRARY)

CMakeLists.txt

@@ -742,6 +742,31 @@ if(CURL_ZSTD)
   endif()
 endif()
 
+#libpsl
+option(CURL_USE_LIBPSL "Use libPSL" ON)
+mark_as_advanced(CURL_USE_LIBPSL)
+set(USE_LIBPSL OFF)
+set(HAVE_LIBPSL OFF)
+set(HAVE_LIBSPSL_H OFF)
+
+if(CURL_USE_LIBPSL)
+  find_package(LibPSL)
+  if(LIBPSL_FOUND)
+    list(APPEND CURL_LIBS ${LIBPSL_LIBRARY})
+    set(CMAKE_REQUIRED_LIBRARIES ${LIBPSL_LIBRARY})
+    list(APPEND CMAKE_REQUIRED_INCLUDES "${LIBPSL_INCLUDE_DIR}")
+    include_directories("${LIBPSL_INCLUDE_DIR}")
+    set(HAVE_LIBPSL ON)
+    set(USE_LIBPSL ON)
+
+    # find_package has already found the headers
+    set(HAVE_LIBPSL_H ON)
+    set(CURL_INCLUDES ${CURL_INCLUDES} "${LIBPSL_INCLUDE_DIR}/libpsl.h")
+    set(CURL_TEST_DEFINES "${CURL_TEST_DEFINES} -DHAVE_LIBPSL_H")
+    unset(CMAKE_REQUIRED_LIBRARIES)
+  endif()
+endif()
+
 #libSSH2
 option(CURL_USE_LIBSSH2 "Use libSSH2" ON)
 mark_as_advanced(CURL_USE_LIBSSH2)

Makefile.am

@@ -34,6 +34,7 @@ CMAKE_DIST =                                    \
  CMake/FindBrotli.cmake                         \
  CMake/FindCARES.cmake                          \
  CMake/FindGSS.cmake                            \
+ CMake/FindLibPSL.cmake                         \
  CMake/FindLibSSH2.cmake                        \
  CMake/FindMbedTLS.cmake                        \
  CMake/FindMSH3.cmake                           \

lib/curl_config.h.cmake

@@ -383,6 +383,12 @@
 /* Define to 1 if you have the `socket' library (-lsocket). */
 #cmakedefine HAVE_LIBSOCKET 1
 
+/* Define to 1 if you have the `psl' library (-lpsl). */
+#cmakedefine HAVE_LIBPSL 1
+
+/* Define to 1 if you have the <libpsl.h> header file. */
+#cmakedefine HAVE_LIBPSL_H 1
+
 /* Define to 1 if you have the `ssh2' library (-lssh2). */
 #cmakedefine HAVE_LIBSSH2 1
 
@@ -915,6 +921,9 @@ ${SIZEOF_TIME_T_CODE}
 /* if libSSH2 is in use */
 #cmakedefine USE_LIBSSH2 1
 
+/* if libPSL is in use */
+#cmakedefine USE_LIBPSL 1
+
 /* If you want to build curl with the built-in manual */
 #cmakedefine USE_MANUAL 1