LibGit2: use OpenSSL

Also, disable linking to mbedTLS

Co-authored-by: Mosè Giordano <giordano@users.noreply.github.com>

L/LibGit2/build_tarballs.jl

@@ -17,10 +17,18 @@ BUILD_FLAGS=(
     -DCMAKE_BUILD_TYPE=Release
     -DUSE_THREADS=ON
     -DUSE_BUNDLED_ZLIB=ON
+    -DUSE_HTTPS=OpenSSL
+    -DUSE_SHA1=CollisionDetection
     -DUSE_SSH=ON
     -DBUILD_CLI=OFF
     "-DCMAKE_INSTALL_PREFIX=${prefix}"
     "-DCMAKE_TOOLCHAIN_FILE="${CMAKE_TARGET_TOOLCHAIN}""
+    # Make sure we don't link to mbedTLS:
+    # <https://github.com/JuliaPackaging/Yggdrasil/pull/8377#issuecomment-2027370830>.
+    # TODO: this hack can be removed when we'll link to a newer version of libssh2 which
+    # doesn't link to mbedTLS.
+    -DLIBSSH2_LDFLAGS="-L${libdir};-lssh2"
+    -DLIBSSH2_LIBRARIES="ssh2"
 )
 
 if [[ ${bb_full_target} == *-sanitize+memory* ]]; then
@@ -37,9 +45,11 @@ if [[ ${target} == *-mingw* ]]; then
 
     # For some reason, CMake fails to find libssh2 using pkg-config.
     BUILD_FLAGS+=(-Dssh2_RESOLVED=${bindir}/libssh2.dll)
-elif [[ ${target} == *linux* ]] || [[ ${target} == *freebsd* ]]; then
-    # If we're on Linux or FreeBSD, explicitly ask for mbedTLS instead of OpenSSL
-    BUILD_FLAGS+=(-DUSE_HTTPS=mbedTLS -DUSE_SHA1=CollisionDetection -DCMAKE_INSTALL_RPATH="\$ORIGIN")
+fi
+
+# Necessary for cmake to find openssl on Windows
+if [[ ${target} == x86_64-*-mingw* ]]; then
+    export OPENSSL_ROOT_DIR=${prefix}/lib64
 fi
 
 mkdir build && cd build
@@ -63,8 +73,8 @@ llvm_version = v"13.0.1"
 
 # Dependencies that must be installed before this package can be built
 dependencies = [
-    Dependency("MbedTLS_jll"; compat="~2.28.0"),
     Dependency("LibSSH2_jll"; compat="1.11.0"),
+    Dependency("OpenSSL_jll"; compat="3.0.8"),
     BuildDependency(PackageSpec(name="LLVMCompilerRT_jll", uuid="4e17d02c-6bf5-513e-be62-445f41c75a11", version=llvm_version);
                     platforms=filter(p -> sanitize(p)=="memory", platforms)),
 ]