Merging upstream version 4.99.5.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 174 insertions, 11 deletions

diff --git a/cmake/Modules/FindCRYPTO.cmake b/cmake/Modules/FindCRYPTO.cmake
index 453c651..25846f3 100644
--- a/cmake/Modules/FindCRYPTO.cmake
+++ b/cmake/Modules/FindCRYPTO.cmake
@@ -2,23 +2,186 @@
 # Try to find libcrypto.
 #
 
-# Try to find the header
-find_path(CRYPTO_INCLUDE_DIR openssl/crypto.h)
+#
+# Were we told where to look for libcrypto?
+#
+if(NOT CRYPTO_ROOT)
+  #
+  # No.
+  #
+  # First, try looking for it with pkg-config, if we have it.
+  #
+  find_package(PkgConfig)
+
+  #
+  # Homebrew's pkg-config does not, by default, look for
+  # pkg-config files for packages it has installed.
+  # Furthermore, at least for OpenSSL, they appear to be
+  # dumped in package-specific directories whose paths are
+  # not only package-specific but package-version-specific.
+  #
+  # So the only way to find openssl is to get the value of
+  # PKG_CONFIG_PATH from "brew --env openssl" and add that
+  # to PKG_CONFIG_PATH.  (No, we can't just assume it's under
+  # /usr/local; Homebrew have conveniently chosen to put it
+  # under /opt/homebrew on ARM.)
+  #
+  # That's the nice thing about Homebrew - it makes things easier!
+  # Thanks!
+  #
+  find_program(BREW brew)
+  if(BREW)
+    #
+    # We have Homebrew.
+    # Get the pkg-config directory for openssl.
+    #
+    execute_process(COMMAND "${BREW}" "--env" "--plain" "openssl"
+      RESULT_VARIABLE BREW_RESULT
+      OUTPUT_VARIABLE BREW_OUTPUT
+      OUTPUT_STRIP_TRAILING_WHITESPACE
+    )
+    if(BREW_RESULT EQUAL 0)
+      #
+      # brew --env --plain openssl succeeded.
+      # Split its output into a list, one entry per line.
+      #
+      string(REGEX MATCHALL "[^\n\r]+" BREW_OUTPUT_LINES "${BREW_OUTPUT}")
+
+      #
+      # Find the line that begins with "PKG_CONFIG_PATH: ", and extract
+      # the path following that.
+      #
+      foreach(LINE IN LISTS BREW_OUTPUT_LINES)
+        if(LINE MATCHES "PKG_CONFIG_PATH: \(.*\)")
+          string(REGEX REPLACE "PKG_CONFIG_PATH: \(.*\)"
+              "\\1" OPENSSL_PKGCONFIG_DIR
+              ${LINE})
+        endif()
+      endforeach()
+    endif()
+  endif()
+
+  #
+  # Save the current value of the PKG_CONFIG_PATH environment
+  # variable.
+  #
+  set(SAVE_PKG_CONFIG_PATH $ENV{PKG_CONFIG_PATH})
+
+  #
+  # If we got an additional pkg-config directory from Homebrew, add
+  # it to the PKG_CONFIG_PATH environment variable.
+  #
+  if(OPENSSL_PKGCONFIG_DIR)
+    set(ENV{PKG_CONFIG_PATH} "${OPENSSL_PKGCONFIG_DIR}:$ENV{PKG_CONFIG_PATH}")
+  endif()
+
+  #
+  # Use pkg-config to find libcrypto.
+  #
+  pkg_check_modules(CRYPTO libcrypto)
 
-# Try to find the library
-find_library(CRYPTO_LIBRARY crypto)
+  #
+  # Revert the change to PKG_CONFIG_PATH.
+  #
+  set(ENV{PKG_CONFIG_PATH} "${SAVE_PKG_CONFIG_PATH}")
+
+  #
+  # Did pkg-config find it?
+  #
+  if(CRYPTO_FOUND)
+    #
+    # This "helpfully" supplies CRYPTO_LIBRARIES as a bunch of
+    # library names - not paths - and CRYPTO_LIBRARY_DIRS as
+    # a bunch of directories.
+    #
+    # CMake *really* doesn't like the notion of specifying "here are
+    # the directories in which to look for libraries" except in
+    # find_library() calls; it *really* prefers using full paths to
+    # library files, rather than library names.
+    #
+    # Find the libraries and add their full paths.
+    #
+    set(CRYPTO_LIBRARY_FULLPATHS)
+    foreach(_lib IN LISTS CRYPTO_LIBRARIES)
+      #
+      # Try to find this library, so we get its full path.
+      #
+      find_library(_libfullpath ${_lib} HINTS ${CRYPTO_LIBRARY_DIRS})
+      list(APPEND CRYPTO_LIBRARY_FULLPATHS ${_libfullpath})
+    endforeach()
+    set(CRYPTO_LIBRARIES "${CRYPTO_LIBRARY_FULLPATHS}")
+  else()
+    #
+    # No.  If we have Homebrew installed, see if it's in Homebrew.
+    #
+    if(BREW)
+      #
+      # The brew man page lies when it speaks of
+      # $BREW --prefix --installed <formula>
+      # outputting nothing.  In Homebrew 3.3.16,
+      # it produces output regardless of whether
+      # the formula is installed or not, so we
+      # send the standard output and error to
+      # the bit bucket.
+      #
+      # libcrypto isn't a formula, openssl is a formula.
+      #
+      execute_process(COMMAND "${BREW}" "--prefix" "--installed" "openssl"
+        RESULT_VARIABLE BREW_RESULT
+        OUTPUT_QUIET
+      )
+      if(BREW_RESULT EQUAL 0)
+        #
+        # Yes.  Get the include directory and library
+        # directory.  (No, we can't just assume it's
+        # under /usr/local; Homebrew have conveniently
+        # chosen to put it under /opt/homebrew on ARM.)
+        #
+        execute_process(COMMAND "${BREW}" "--prefix" "openssl"
+          RESULT_VARIABLE BREW_RESULT
+          OUTPUT_VARIABLE OPENSSL_PATH
+          OUTPUT_STRIP_TRAILING_WHITESPACE
+        )
+        set(CRYPTO_INCLUDE_DIRS "${OPENSSL_PATH}/include")
+
+        #
+        # Search for the libcrypto library under lib.
+        #
+        find_library(CRYPTO_LIBRARIES crypto
+            PATHS "${OPENSSL_PATH}/lib"
+            NO_DEFAULT_PATH)
+      endif()
+    endif()
+  endif()
+endif()
+
+#
+# Have we found it with pkg-config or Homebrew?
+#
+if(NOT CRYPTO_INCLUDE_DIRS)
+  #
+  # No.
+  # Try to find the openss/evp.h header.
+  # We search for that header to make sure that it's installed (if
+  # it's just a shared library for the benefit of existing
+  # programs, that's not useful).
+  #
+  find_path(CRYPTO_INCLUDE_DIRS openssl/evp.h)
+
+  #
+  # Try to find the library.
+  #
+  find_library(CRYPTO_LIBRARIES crypto)
+endif()
 
 include(FindPackageHandleStandardArgs)
 find_package_handle_standard_args(CRYPTO
   DEFAULT_MSG
-  CRYPTO_INCLUDE_DIR
-  CRYPTO_LIBRARY
+  CRYPTO_INCLUDE_DIRS
+  CRYPTO_LIBRARIES
 )
 
 mark_as_advanced(
-  CRYPTO_INCLUDE_DIR
-  CRYPTO_LIBRARY
+  CRYPTO_INCLUDE_DIRS
+  CRYPTO_LIBRARIES
 )
-
-set(CRYPTO_INCLUDE_DIRS ${CRYPTO_INCLUDE_DIR})
-set(CRYPTO_LIBRARIES ${CRYPTO_LIBRARY})