using curl's ext_windows subdirectory to build curl with libressl on windows

3rdParty/curl/CMakeLists.txt

@@ -5,8 +5,13 @@ set(CURL_DEPS_INSTALL ${CMAKE_BINARY_DIR}/deps_curl)
 set(CURL_FOUND 0)
 if (NOT ${CURL_FOUND})
     file(MAKE_DIRECTORY ${CURL_DEPS_INSTALL})
+    if (WIN32)
+        set(EXT_DIR ext_windows)
+    else ()
+        set(EXT_DIR ext)
+    endif ()
     execute_process(
-            COMMAND ${CMAKE_COMMAND} -G ${CMAKE_GENERATOR} -DTOOLCHAIN_FILE=${CMAKE_TOOLCHAIN_FILE} ${CMAKE_CURRENT_SOURCE_DIR}/ext -DCURL_REPO=${CURL_REPO} -DOPENSSL_REPO=${OPENSSL_REPO} -DPLATFORM=${PLATFORM}
+            COMMAND ${CMAKE_COMMAND} -G ${CMAKE_GENERATOR} -DTOOLCHAIN_FILE=${CMAKE_TOOLCHAIN_FILE} ${CMAKE_CURRENT_SOURCE_DIR}/${EXT_DIR} -DCURL_REPO=${CURL_REPO} -DOPENSSL_REPO=${OPENSSL_REPO} -DPLATFORM=${PLATFORM}
             WORKING_DIRECTORY ${CURL_DEPS_INSTALL}
     )
     execute_process(

3rdParty/curl/ext/CMakeLists.txt

@@ -1,41 +1,133 @@
 cmake_minimum_required(VERSION 3.16)
 project(build_curl)
+include(ExternalProject)
 include(FetchContent)
 
-if (NOT DEFINED CURL_MIRROR_LINK)
-    set(CURL_MIRROR_LINK https://curl.se/download/curl-8.8.0.tar.gz)
+if (NOT DEFINED CURL_REPO OR CURL_REPO STREQUAL "")
+    set(CURL_REPO https://github.com/curl/curl.git)
 endif ()
-if (NOT DEFINED LIBRESSL_MIRROR_LINK)
-    set(LIBRESSL_MIRROR_LINK https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-3.9.2.tar.gz)
+if (NOT DEFINED OPENSSL_REPO OR OPENSSL_REPO STREQUAL "")
+    set(OPENSSL_REPO https://github.com/openssl/openssl.git)
 endif ()
 
-set(LIBRESSL_TESTS OFF CACHE BOOL "" FORCE)
-FetchContent_Declare(
-    libressl
-    URL ${LIBRESSL_MIRROR_LINK}
-)
-FetchContent_MakeAvailable(libressl)
+set(OPENSSL_SOURCE_DIR ${CMAKE_BINARY_DIR}/deps_curl/openssl-src)
+set(OPENSSL_INSTALL_DIR ${CMAKE_BINARY_DIR}/INSTALL)
+set(OPENSSL_INCLUDE_DIR ${OPENSSL_INSTALL_DIR}/include)
+set(OPENSSL_TAG OpenSSL_1_1_1n)
+set(OPENSSL_USE_STATIC_LIBS TRUE)
 
-# add_library(OpenSSL::SSL STATIC IMPORTED)
-# set_target_properties(OpenSSL::SSL PROPERTIES
-    # IMPORTED_LOCATION "${libressl_BINARY_DIR}/crypto/libcrypto.a"
-    # INTERFACE_INCLUDE_DIRECTORIES "${libressl_SOURCE_DIR}/include"
-# )
+find_program(PERL_EXECUTABLE perl)
+if (NOT PERL_EXECUTABLE)
+    message(FATAL_ERROR "Perl not found. Please install Perl to configure OpenSSL.")
+endif()
 
-# add_library(OpenSSL::Crypto STATIC IMPORTED)
-# set_target_properties(OpenSSL::Crypto PROPERTIES
-    # IMPORTED_LOCATION "${libressl_BINARY_DIR}/ssl/libssl.a"
-    # INTERFACE_INCLUDE_DIRECTORIES "${libressl_SOURCE_DIR}/include"
-# )
+if (MSVC)
+    set(OPENSSL_PERL_CONFIGURE_COMMAND ${OPENSSL_SOURCE_DIR}/src/openssl/Configure VC-WIN64A)
+    set(OPENSSL_MAKE_COMMAND nmake)
+else ()
+    set(OPENSSL_PERL_CONFIGURE_COMMAND ${OPENSSL_SOURCE_DIR}/src/OpenSSL/config --static -static -fPIC)
+    set(OPENSSL_MAKE_COMMAND make)
+endif ()
 
-set(CURL_USE_LIBRESSL ON CACHE BOOL "Use LibreSSL instead of OpenSSL" FORCE)
-set(OPENSSL_ROOT_DIR ${libressl_SOURCE_DIR} CACHE PATH "Path to LibreSSL root directory" FORCE)
-set(OPENSSL_CRYPTO_LIBRARY ${libressl_BINARY_DIR}/crypto/libcrypto.a CACHE FILEPATH "Path to LibreSSL crypto library" FORCE)
-set(OPENSSL_SSL_LIBRARY ${libressl_BINARY_DIR}/ssl/libssl.a CACHE FILEPATH "Path to LibreSSL SSL library" FORCE)
-set(OPENSSL_INCLUDE_DIR ${libressl_SOURCE_DIR}/include CACHE PATH "Path to LibreSSL include directory" FORCE)
+set(CURL_GIT_TAG curl-8_8_0)
 
-FetchContent_Declare(
-    curl
-    URL ${CURL_MIRROR_LINK}
-)
-FetchContent_MakeAvailable(curl)
+function(InstallOpenSSL)
+    ExternalProject_Add(
+            OpenSSL
+            PREFIX ${OPENSSL_SOURCE_DIR}
+            GIT_REPOSITORY ${OPENSSL_REPO}
+            GIT_TAG ${OPENSSL_TAG}
+            GIT_SHALLOW TRUE
+            CONFIGURE_COMMAND ${PERL_EXECUTABLE} ${OPENSSL_PERL_CONFIGURE_COMMAND} --prefix=${OPENSSL_INSTALL_DIR} --openssldir=${OPENSSL_INSTALL_DIR} no-shared no-tests
+            BUILD_COMMAND ${OPENSSL_MAKE_COMMAND}
+            INSTALL_COMMAND ${OPENSSL_MAKE_COMMAND} install
+            INSTALL_DIR ${OPENSSL_INSTALL_DIR}
+            USES_TERMINAL_DOWNLOAD TRUE
+            USES_TERMINAL_CONFIGURE TRUE
+            USES_TERMINAL_BUILD TRUE
+            USES_TERMINAL_INSTALL TRUE
+        )
+endfunction()
+
+function(InstallCurl DEPENDENCY_TARGETS OPENSSL_ROOT_DIR)
+    ExternalProject_Add(
+        curl
+        DEPENDS ${DEPENDENCY_TARGETS}
+        GIT_REPOSITORY ${CURL_REPO}
+        GIT_TAG ${CURL_GIT_TAG}
+        GIT_SHALLOW TRUE
+        SOURCE_DIR ${CMAKE_BINARY_DIR}/curl
+        BINARY_DIR ${CMAKE_BINARY_DIR}/curl-build
+        CMAKE_GENERATOR ${CMAKE_GENERATOR}
+        CMAKE_ARGS
+            -DCMAKE_TOOLCHAIN_FILE:FILEPATH=${TOOLCHAIN_FILE}
+            -DCMAKE_BUILD_TYPE:STRING=Release
+            -DCURL_USE_OPENSSL:BOOL=ON
+            -DOPENSSL_ROOT_DIR=${OPENSSL_ROOT_DIR}
+            -DOPENSSL_INCLUDE_DIR=${OPENSSL_INCLUDE_DIR}
+            -DCMAKE_PREFIX_PATH=${CMAKE_BINARY_DIR}/INSTALL
+            -DCMAKE_INSTALL_PREFIX:PATH=${CMAKE_BINARY_DIR}/INSTALL
+        BUILD_COMMAND ${CMAKE_COMMAND} --build ${CMAKE_BINARY_DIR}/curl-build --config Release
+        INSTALL_COMMAND ${CMAKE_COMMAND} --install ${CMAKE_BINARY_DIR}/curl-build --config Release
+        USES_TERMINAL_DOWNLOAD TRUE
+        USES_TERMINAL_CONFIGURE TRUE
+        USES_TERMINAL_BUILD TRUE
+        USES_TERMINAL_INSTALL TRUE
+    )
+endfunction()
+
+if (APPLE)
+    ExternalProject_Add(
+        curl
+        GIT_REPOSITORY ${CURL_REPO}
+        GIT_TAG ${CURL_GIT_TAG}
+        GIT_SHALLOW TRUE
+        SOURCE_DIR ${CMAKE_BINARY_DIR}/curl
+        BINARY_DIR ${CMAKE_BINARY_DIR}/curl-build
+        CMAKE_GENERATOR ${CMAKE_GENERATOR}
+        CMAKE_ARGS
+            -DCMAKE_TOOLCHAIN_FILE:FILEPATH=${TOOLCHAIN_FILE}
+            -DCMAKE_BUILD_TYPE:STRING=Release
+            -DCURL_USE_OPENSSL:BOOL=OFF
+            -DBUILD_SHARED_LIBS:BOOL=OFF
+            -DBUILD_STATIC_LIBS:BOOL=OFF
+            -DBUILD_CURL_EXE:BOOL=OFF
+            -DCMAKE_PREFIX_PATH=${CMAKE_BINARY_DIR}/INSTALL
+            -DCMAKE_INSTALL_PREFIX:PATH=${CMAKE_BINARY_DIR}/INSTALL
+        BUILD_COMMAND ${CMAKE_COMMAND} --build ${CMAKE_BINARY_DIR}/curl-build --config Release
+        INSTALL_COMMAND ${CMAKE_COMMAND} --install ${CMAKE_BINARY_DIR}/curl-build --config Release
+        USES_TERMINAL_DOWNLOAD TRUE
+        USES_TERMINAL_CONFIGURE TRUE
+        USES_TERMINAL_BUILD TRUE
+        USES_TERMINAL_INSTALL TRUE
+    )
+elseif (WIN32)
+
+    set(CURL_DEPDENDENCY_TARGETS "")
+    set(OPENSSL_ROOT_DIR ${OPENSSL_INSTALL_DIR})
+    list(APPEND CMAKE_PREFIX_PATH ${OPENSSL_INSTALL_DIR})
+    
+    find_package(OpenSSL QUIET)
+    if(NOT OpenSSL_FOUND)
+        message("OpenSSL not found. Building OpenSSL from sources...")
+        set(CURL_DEPDENDENCY_TARGETS OpenSSL)
+        InstallOpenSSL()
+    else ()
+        set(CURL_DEPDENDENCY_TARGETS OpenSSL::SSL OpenSSL::Crypto)
+        message("OpenSSL is already built. Root directory is ${OPENSSL_ROOT_DIR}, include directory is ${OPENSSL_INCLUDE_DIR}")
+    endif()
+
+    find_package(CURL QUIET)
+    if (NOT CURL_FOUND)
+        message("CURL not found. Building CURL from sources...")
+        # set(BUILD_SHARED_LIBS OFF) set(BUILD_STATIC_LIBS ON)
+        InstallCurl(${CURL_DEPDENDENCY_TARGETS} ${OPENSSL_ROOT_DIR})
+    else ()
+        message("CURL is already built")
+    endif ()
+else ()
+    InstallOpenSSL()
+    ExternalProject_Get_Property(OpenSSL INSTALL_DIR)
+    set(OPENSSL_ROOT_DIR ${INSTALL_DIR})
+    InstallCurl(OpenSSL ${OPENSSL_ROOT_DIR})
+endif ()

3rdParty/curl/ext_windows/CMakeLists.txt

@@ -0,0 +1,29 @@
+cmake_minimum_required(VERSION 3.16)
+project(build_curl)
+include(FetchContent)
+
+if (NOT DEFINED CURL_MIRROR_LINK)
+    set(CURL_MIRROR_LINK https://curl.se/download/curl-8.8.0.tar.gz)
+endif ()
+if (NOT DEFINED LIBRESSL_MIRROR_LINK)
+    set(LIBRESSL_MIRROR_LINK https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-3.9.2.tar.gz)
+endif ()
+
+set(LIBRESSL_TESTS OFF CACHE BOOL "" FORCE)
+FetchContent_Declare(
+    libressl
+    URL ${LIBRESSL_MIRROR_LINK}
+)
+FetchContent_MakeAvailable(libressl)
+
+set(CURL_USE_LIBRESSL ON CACHE BOOL "Use LibreSSL instead of OpenSSL" FORCE)
+set(OPENSSL_ROOT_DIR ${libressl_SOURCE_DIR} CACHE PATH "Path to LibreSSL root directory" FORCE)
+set(OPENSSL_CRYPTO_LIBRARY ${libressl_BINARY_DIR}/crypto/libcrypto.a CACHE FILEPATH "Path to LibreSSL crypto library" FORCE)
+set(OPENSSL_SSL_LIBRARY ${libressl_BINARY_DIR}/ssl/libssl.a CACHE FILEPATH "Path to LibreSSL SSL library" FORCE)
+set(OPENSSL_INCLUDE_DIR ${libressl_SOURCE_DIR}/include CACHE PATH "Path to LibreSSL include directory" FORCE)
+
+FetchContent_Declare(
+    curl
+    URL ${CURL_MIRROR_LINK}
+)
+FetchContent_MakeAvailable(curl)