cmake: Prepare blst dependency (#972)

Configure blst dependency using CMake's ExternalProject.

cmake/blst.cmake

@@ -0,0 +1,43 @@
+include_guard()
+include(ExternalProject)
+
+if(MSVC)
+    set(BLST_BUILD_SCRIPT build.bat)
+elseif(CMAKE_SYSTEM_NAME STREQUAL "Darwin")
+    # Don't pass CC to the script because it doesn't work.
+    set(BLST_BUILD_SCRIPT ./build.sh -mmacosx-version-min=${CMAKE_OSX_DEPLOYMENT_TARGET})
+else()
+    # Pass CC and AR, this supports cross-compilation.
+    # Pass CFLAGS as part of CC (e.g. to pass -m32). Using CFLAGS directly overwrites blst's default.
+    string(JOIN " " BLST_CC ${CMAKE_C_COMPILER} ${CMAKE_C_FLAGS})
+    set(BLST_BUILD_SCRIPT ./build.sh CC='${BLST_CC}' AR='${CMAKE_AR}')
+endif()
+
+ExternalProject_Add(
+    blst
+    EXCLUDE_FROM_ALL TRUE
+    PREFIX ${PROJECT_BINARY_DIR}/deps
+    URL https://github.com/supranational/blst/archive/refs/tags/v0.3.13.tar.gz
+    URL_HASH SHA256=89772cef338e93bc0348ae531462752906e8fa34738e38035308a7931dd2948f
+    DOWNLOAD_NO_PROGRESS TRUE
+    CONFIGURE_COMMAND ""
+    BUILD_COMMAND ${BLST_BUILD_SCRIPT}
+    BUILD_IN_SOURCE TRUE
+    BUILD_BYPRODUCTS "<SOURCE_DIR>/${CMAKE_STATIC_LIBRARY_PREFIX}blst${CMAKE_STATIC_LIBRARY_SUFFIX}"
+    LOG_BUILD TRUE
+    LOG_OUTPUT_ON_FAILURE TRUE
+    INSTALL_COMMAND ""
+)
+ExternalProject_Get_Property(blst SOURCE_DIR)
+
+set(BLST_INCLUDE_DIR ${SOURCE_DIR}/bindings)
+file(MAKE_DIRECTORY ${BLST_INCLUDE_DIR})
+
+add_library(blst::blst STATIC IMPORTED GLOBAL)
+add_dependencies(blst::blst blst)
+set_target_properties(
+    blst::blst PROPERTIES
+    INTERFACE_INCLUDE_DIRECTORIES ${BLST_INCLUDE_DIR}
+    IMPORTED_LOCATION ${SOURCE_DIR}/${CMAKE_STATIC_LIBRARY_PREFIX}blst${CMAKE_STATIC_LIBRARY_SUFFIX}
+)
+

lib/evmone_precompiles/CMakeLists.txt

@@ -2,6 +2,8 @@
 # Copyright 2023 The evmone Authors.
 # SPDX-License-Identifier: Apache-2.0
 
+include(blst)
+
 add_library(evmone_precompiles STATIC)
 add_library(evmone::precompiles ALIAS evmone_precompiles)
 target_link_libraries(evmone_precompiles PUBLIC evmc::evmc_cpp PRIVATE evmone::evmmax)