#
#openssl
#
#See http://developer.covenanteyes.com/building-openssl-for-visual-studio/
#and https://cmake.org/Bug/view.php?id=13251
#for how to build openssl for Windows.
#
#To build openssl on Windows:
#
# - Requires perl 5.30 in order to configure.
# - Set up the toolchain environment prior to compilation by either
#   64 bit build: C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\vcvarsall x86_amd64
#   or
#   32 bit build: C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\vcvarsall x86
#
#The option BUILD_SHARED_LIBS controls the type of library built.
#

if (WIN32)
#Define an empty openssl project. Building under WIN32 is a retrofitted kludge
#we have yet to deal with.
#Requires perl version 5.30
ExternalProject_Add (
  openssl
  BUILD_IN_SOURCE 1
  DOWNLOAD_COMMAND ""
  CONFIGURE_COMMAND ""
  BUILD_COMMAND ""
  INSTALL_COMMAND "oops"
)
endif (WIN32)

if (UNIX)
#Requires perl 5.30
ExternalProject_Add (
  openssl
  PREFIX ${CMAKE_INSTALL_PREFIX}
  BUILD_IN_SOURCE 1 #We will install directly from the source, so no build directory is needed
  URL https://github.com/openssl/openssl/archive/refs/tags/OpenSSL_1_1_1m.zip
  URL_MD5 5fba669822402e35121f5a3db360fcc0
  CONFIGURE_COMMAND ./config --prefix=<INSTALL_DIR>
  BUILD_COMMAND make
  INSTALL_COMMAND make install
)
endif (UNIX)