Partial support for wasi-sdk

CMakeLists.txt

@@ -8,8 +8,19 @@ project(
   LANGUAGES C CXX)
 set(CMAKE_CXX_STANDARD 20)
 
+include(CMakePushCheckState)
+include(CheckCXXCompilerFlag)
+include(CheckIncludeFileCXX)
+include(CheckCXXSourceCompiles)
+
 set(DEFAULT_BUILD_TYPE "Release")
 
+if(EMSCRIPTEN OR CMAKE_SYSTEM_NAME STREQUAL WASI)
+  set(WASM ON)
+else()
+  set(WASM OFF)
+endif()
+
 if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
   message(
     STATUS
@@ -23,7 +34,24 @@ if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
 endif()
 
 add_compile_options(-fdata-sections -ffunction-sections -Wswitch-enum
-                    -Werror=switch-enum)
+                    -Werror=switch-enum -fPIC)
+add_link_options(-pie)
+
+set(full_relro_flags "LINKER:-z,relro,-z,now,-z,noexecstack")
+cmake_push_check_state()
+list(APPEND CMAKE_REQUIRED_LINK_OPTIONS ${full_relro_flags})
+check_cxx_source_compiles("int main(){}" HAS_FULL_RELRO FAIL_REGEX "warning:")
+if(HAS_FULL_RELRO)
+  add_link_options(${full_relro_flags})
+endif()
+cmake_pop_check_state()
+
+set(version_script_flags LINKER:--version-script=${CMAKE_SOURCE_DIR}/linker.map)
+cmake_push_check_state()
+list(APPEND CMAKE_REQUIRED_LINK_OPTIONS ${version_script_flags})
+check_cxx_source_compiles("int main(){}" HAS_VERSION_SCRIPT FAIL_REGEX
+                          "warning:")
+cmake_pop_check_state()
 
 option(USE_SIMD_FALLBACK
        "Use fallback implementations of functions that use SIMD" OFF)
@@ -46,12 +74,10 @@ if(EMSCRIPTEN)
   add_link_options(-s ALLOW_MEMORY_GROWTH)
 endif()
 
-include(CheckIncludeFileCXX)
-include(CMakePushCheckState)
-
 if(NOT USE_SIMD_FALLBACK)
-  if(EMSCRIPTEN)
-    # https://emscripten.org/docs/porting/simd.html#using-simd-with-webassembly
+  check_include_file_cxx("wasm_simd128.h" HAS_WASM_SIMD)
+  if(HAS_WASM_SIMD)
+    add_compile_definitions(HAS_WASM_SIMD)
     add_compile_options(-msimd128)
   endif()
 
@@ -73,7 +99,7 @@ endif()
 set(CMAKE_CXX_IMPLICIT_LINK_LIBRARIES "")
 
 add_library(${PROJECT_NAME}_object OBJECT ConflictSet.cpp)
-target_compile_options(${PROJECT_NAME}_object PRIVATE -fPIC -fno-exceptions
+target_compile_options(${PROJECT_NAME}_object PRIVATE -fno-exceptions
                                                       -fvisibility=hidden)
 target_include_directories(${PROJECT_NAME}_object
                            PRIVATE ${CMAKE_SOURCE_DIR}/include)
@@ -86,11 +112,9 @@ if(NOT CMAKE_BUILD_TYPE STREQUAL Debug)
   set_target_properties(${PROJECT_NAME} PROPERTIES LINKER_LANGUAGE C)
 endif()
 
-if(NOT APPLE)
-  target_link_options(
-    ${PROJECT_NAME} PRIVATE
-    LINKER:--version-script=${CMAKE_SOURCE_DIR}/linker.map
-    LINKER:-z,relro,-z,now,-z,noexecstack)
+if(HAS_VERSION_SCRIPT)
+  target_link_options(${PROJECT_NAME} PRIVATE
+                      LINKER:--version-script=${CMAKE_SOURCE_DIR}/linker.map)
 endif()
 
 add_library(${PROJECT_NAME}-static STATIC
@@ -99,15 +123,14 @@ if(NOT CMAKE_BUILD_TYPE STREQUAL Debug)
   set_target_properties(${PROJECT_NAME}-static PROPERTIES LINKER_LANGUAGE C)
 endif()
 
-if(NOT EMSCRIPTEN
-   AND NOT APPLE
-   AND CMAKE_OBJCOPY)
+if(CMAKE_OBJCOPY)
   add_custom_command(
     TARGET conflict-set-static
     POST_BUILD
     COMMAND
       ${CMAKE_OBJCOPY} --keep-global-symbols=${CMAKE_SOURCE_DIR}/symbols.txt
-      $<TARGET_FILE:${PROJECT_NAME}-static>)
+      $<TARGET_FILE:${PROJECT_NAME}-static> || echo
+      "Proceeding with all symbols global in static library")
 endif()
 
 set(TEST_FLAGS -Wall -Wextra -Wunreachable-code -Wpedantic -UNDEBUG)
@@ -116,16 +139,17 @@ include(CTest)
 
 if(BUILD_TESTING)
 
-  # corpus tests, which are test
+  # corpus tests, which are tests curated by libfuzzer. The goal is to get broad
+  # coverage with a small number of tests.
 
   file(GLOB CORPUS_TESTS ${CMAKE_SOURCE_DIR}/corpus/*)
 
   # extra testing that relies on shared libraries, which aren't available with
-  # emscripten
-  if(NOT EMSCRIPTEN)
+  # wasm
+  if(NOT WASM)
     # Shared library version of FoundationDB's skip list implementation
     add_library(skip_list SHARED SkipList.cpp)
-    target_compile_options(skip_list PRIVATE -fPIC -fno-exceptions
+    target_compile_options(skip_list PRIVATE -fno-exceptions
                                              -fvisibility=hidden)
     target_include_directories(skip_list PUBLIC ${CMAKE_SOURCE_DIR}/include)
     set_target_properties(skip_list PROPERTIES LIBRARY_OUTPUT_DIRECTORY
@@ -138,7 +162,7 @@ if(BUILD_TESTING)
     # Shared library version of a std::unordered_map-based conflict set (point
     # queries only)
     add_library(hash_table SHARED HashTable.cpp)
-    target_compile_options(hash_table PRIVATE -fPIC -fno-exceptions
+    target_compile_options(hash_table PRIVATE -fno-exceptions
                                               -fvisibility=hidden)
     target_include_directories(hash_table PUBLIC ${CMAKE_SOURCE_DIR}/include)
     set_target_properties(
@@ -186,7 +210,7 @@ if(BUILD_TESTING)
     endif()
   endif()
 
-  # fuzz/whitebox tests
+  # whitebox tests
   add_executable(fuzz_driver ConflictSet.cpp FuzzTestDriver.cpp)
   target_compile_options(fuzz_driver PRIVATE ${TEST_FLAGS})
   if(NOT CMAKE_CROSSCOMPILING)
@@ -224,10 +248,11 @@ if(BUILD_TESTING)
     add_test(NAME conflict_set_blackbox_${hash} COMMAND driver ${TEST})
   endforeach()
 
+  # scripted tests. Written manually to fill in anything libfuzzer couldn't
+  # find.
   add_executable(script_test ScriptTest.cpp)
   target_compile_options(script_test PRIVATE ${TEST_FLAGS})
   target_link_libraries(script_test PRIVATE ${PROJECT_NAME})
-
   file(GLOB SCRIPT_TESTS ${CMAKE_SOURCE_DIR}/script_tests/*)
   foreach(TEST ${SCRIPT_TESTS})
     get_filename_component(name ${TEST} NAME)
@@ -261,7 +286,8 @@ if(BUILD_TESTING)
                         PROPERTIES CXX_STANDARD_REQUIRED ON)
   add_test(NAME conflict_set_cxx_api_test COMMAND conflict_set_cxx_api_test)
 
-  if(NOT EMSCRIPTEN
+  # symbol visibility tests
+  if(NOT WASM
      AND NOT APPLE
      AND NOT CMAKE_BUILD_TYPE STREQUAL Debug)
     add_test(
@@ -276,15 +302,14 @@ if(BUILD_TESTING)
   endif()
 
   # bench
-
   add_executable(conflict_set_bench Bench.cpp)
   target_link_libraries(conflict_set_bench PRIVATE ${PROJECT_NAME})
   set_target_properties(conflict_set_bench PROPERTIES SKIP_BUILD_RPATH ON)
-
   add_executable(real_data_bench RealDataBench.cpp)
   target_link_libraries(real_data_bench PRIVATE ${PROJECT_NAME})
   set_target_properties(real_data_bench PROPERTIES SKIP_BUILD_RPATH ON)
 endif()
+
 # packaging
 
 set(CPACK_PACKAGE_CONTACT andrew@weaselab.dev)