From e6718fcfcc979cedcdb01294003431519e7785f3 Mon Sep 17 00:00:00 2001 From: gingerBill Date: Wed, 26 Mar 2025 13:09:39 +0000 Subject: Very very rudimentary support for `-target:linux_arm64 -subtarget:android` --- src/linker.cpp | 167 +++++++++++++++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 157 insertions(+), 10 deletions(-) (limited to 'src/linker.cpp') diff --git a/src/linker.cpp b/src/linker.cpp index 1568d049e..5e2720eeb 100644 --- a/src/linker.cpp +++ b/src/linker.cpp @@ -130,6 +130,9 @@ gb_internal i32 linker_stage(LinkerData *gen) { return result; } + bool is_cross_linking = false; + bool is_android = false; + if (build_context.cross_compiling && selected_target_metrics->metrics == &target_essence_amd64) { #if defined(GB_SYSTEM_UNIX) result = system_exec_command_line_app("linker", "x86_64-essence-gcc \"%.*s.o\" -o \"%.*s\" %.*s %.*s", @@ -141,12 +144,22 @@ gb_internal i32 linker_stage(LinkerData *gen) { ); #endif } else if (build_context.cross_compiling && build_context.different_os) { - gb_printf_err("Linking for cross compilation for this platform is not yet supported (%.*s %.*s)\n", - LIT(target_os_names[build_context.metrics.os]), - LIT(target_arch_names[build_context.metrics.arch]) - ); - build_context.keep_object_files = true; + switch (selected_subtarget) { + case Subtarget_Android: + is_cross_linking = true; + is_android = true; + goto try_cross_linking; + default: + gb_printf_err("Linking for cross compilation for this platform is not yet supported (%.*s %.*s)\n", + LIT(target_os_names[build_context.metrics.os]), + LIT(target_arch_names[build_context.metrics.arch]) + ); + build_context.keep_object_files = true; + break; + } } else { +try_cross_linking:; + #if defined(GB_SYSTEM_WINDOWS) bool is_windows = build_context.metrics.os == TargetOs_windows; #else @@ -155,6 +168,7 @@ gb_internal i32 linker_stage(LinkerData *gen) { bool is_osx = build_context.metrics.os == TargetOs_darwin; + if (is_windows) { String section_name = str_lit("msvc-link"); switch (build_context.linker_choice) { @@ -404,6 +418,44 @@ gb_internal i32 linker_stage(LinkerData *gen) { } else { timings_start_section(timings, str_lit("ld-link")); + String ODIN_ANDROID_NDK_PATH = normalize_path(permanent_allocator(), make_string_c(gb_get_env("ODIN_ANDROID_NDK_PATH", permanent_allocator())), NIX_SEPARATOR_STRING); + String ODIN_ANDROID_NDK_TOOLCHAIN_PATH = normalize_path(permanent_allocator(), make_string_c(gb_get_env("ODIN_ANDROID_NDK_TOOLCHAIN_PATH", permanent_allocator())), NIX_SEPARATOR_STRING); + + int ODIN_ANDROID_API_LEVEL = 34; + if (char const *found = gb_get_env("ODIN_ANDROID_API_LEVEL", permanent_allocator())) { + int new_level = atoi(found); + if (new_level >= 34) { + ODIN_ANDROID_API_LEVEL = new_level; + } else { + gb_printf_err("Warning: Invalid ODIN_ANDROID_API_LEVEL '%s', defaulting to %d\n", found, ODIN_ANDROID_API_LEVEL); + } + } + + String ODIN_ANDROID_NDK_TOOLCHAIN_LIB_PATH = {}; + String ODIN_ANDROID_NDK_TOOLCHAIN_LIB_LEVEL_PATH = {}; + String ODIN_ANDROID_NDK_TOOLCHAIN_SYSROOT_PATH = {}; + + if (is_android) { + if (ODIN_ANDROID_NDK_PATH.len == 0) { + gb_printf_err("Error: ODIN_ANDROID_NDK_PATH not set"); + return 1; + } + + if (ODIN_ANDROID_NDK_TOOLCHAIN_PATH.len == 0) { + gb_printf_err("Error: ODIN_ANDROID_NDK_PATH not set"); + return 1; + } + + ODIN_ANDROID_NDK_TOOLCHAIN_LIB_PATH = concatenate_strings(permanent_allocator(), ODIN_ANDROID_NDK_TOOLCHAIN_PATH, str_lit("sysroot/usr/lib/aarch64-linux-android/")); + + char buf[32] = {}; + gb_snprintf(buf, gb_size_of(buf), "%d/", ODIN_ANDROID_API_LEVEL); + ODIN_ANDROID_NDK_TOOLCHAIN_LIB_LEVEL_PATH = concatenate_strings(permanent_allocator(), ODIN_ANDROID_NDK_TOOLCHAIN_LIB_PATH, make_string_c(buf)); + + ODIN_ANDROID_NDK_TOOLCHAIN_SYSROOT_PATH = concatenate_strings(permanent_allocator(), ODIN_ANDROID_NDK_TOOLCHAIN_PATH, str_lit("sysroot/")); + } + + // Link using `clang`, unless overridden by `ODIN_CLANG_PATH` environment variable. const char* clang_path = gb_get_env("ODIN_CLANG_PATH", permanent_allocator()); if (clang_path == NULL) { @@ -412,8 +464,11 @@ gb_internal i32 linker_stage(LinkerData *gen) { // NOTE(vassvik): needs to add the root to the library search paths, so that the full filenames of the library // files can be passed with -l: - gbString lib_str = gb_string_make(heap_allocator(), "-L/"); + gbString lib_str = gb_string_make(heap_allocator(), ""); defer (gb_string_free(lib_str)); + #if !defined(GB_SYSTEM_WINDOWS) + lib_str = gb_string_appendc(lib_str, "-L/ "); + #endif StringSet asm_files = {}; string_set_init(&asm_files, 64); @@ -602,6 +657,74 @@ gb_internal i32 linker_stage(LinkerData *gen) { gbString object_files = gb_string_make(heap_allocator(), ""); defer (gb_string_free(object_files)); + + + if (is_android) { // NOTE(bill): glue code needed for Android + String android_glue_object = {}; + String android_glue_static_lib = {}; + + char hash_buf[64] = {}; + gb_snprintf(hash_buf, gb_size_of(hash_buf), "%p", &hash_buf); + String hash = make_string_c(hash_buf); + + String temp_dir = normalize_path(temporary_allocator(), temporary_directory(temporary_allocator()), NIX_SEPARATOR_STRING); + android_glue_object = concatenate4_strings(temporary_allocator(), temp_dir, str_lit("android_native_app_glue-"), hash, str_lit(".o")); + android_glue_static_lib = concatenate4_strings(permanent_allocator(), temp_dir, str_lit("libandroid_native_app_glue-"), hash, str_lit(".a")); + + gbString glue = gb_string_make(heap_allocator(), clang_path); + defer (gb_string_free(glue)); + + glue = gb_string_append_fmt(glue, " --target=aarch64-linux-android%d ", ODIN_ANDROID_API_LEVEL); + glue = gb_string_appendc(glue, "-c \""); + glue = gb_string_append_length(glue, ODIN_ANDROID_NDK_PATH.text, ODIN_ANDROID_NDK_PATH.len); + glue = gb_string_appendc(glue, "sources/android/native_app_glue/android_native_app_glue.c"); + glue = gb_string_appendc(glue, "\" "); + glue = gb_string_appendc(glue, "-o \""); + glue = gb_string_append_length(glue, android_glue_object.text, android_glue_object.len); + glue = gb_string_appendc(glue, "\" "); + + glue = gb_string_appendc(glue, "\"-I"); + glue = gb_string_append_length(glue, ODIN_ANDROID_NDK_TOOLCHAIN_PATH.text, ODIN_ANDROID_NDK_TOOLCHAIN_PATH.len); + glue = gb_string_appendc(glue, "sysroot/usr/include/"); + glue = gb_string_appendc(glue, "\" "); + + glue = gb_string_appendc(glue, "\"-I"); + glue = gb_string_append_length(glue, ODIN_ANDROID_NDK_TOOLCHAIN_PATH.text, ODIN_ANDROID_NDK_TOOLCHAIN_PATH.len); + glue = gb_string_appendc(glue, "sysroot/usr/include/aarch64-linux-android/"); + glue = gb_string_appendc(glue, "\" "); + + + glue = gb_string_appendc(glue, "-Wno-macro-redefined "); + + result = system_exec_command_line_app("android-native-app-glue-compile", glue); + if (result) { + return result; + } + + gbString ar = gb_string_make_length(heap_allocator(), ODIN_ANDROID_NDK_TOOLCHAIN_PATH.text, ODIN_ANDROID_NDK_TOOLCHAIN_PATH.len); + defer (gb_string_free(ar)); + + ar = gb_string_appendc(ar, "bin/llvm-ar"); + + ar = gb_string_appendc(ar, " rcs "); + + ar = gb_string_appendc(ar, "\""); + ar = gb_string_append_length(ar, android_glue_static_lib.text, android_glue_static_lib.len); + ar = gb_string_appendc(ar, "\" "); + + ar = gb_string_appendc(ar, "\""); + ar = gb_string_append_length(ar, android_glue_object.text, android_glue_object.len); + ar = gb_string_appendc(ar, "\" "); + + result = system_exec_command_line_app("android-native-app-glue-ar", ar); + if (result) { + return result; + } + + object_files = gb_string_append_fmt(object_files, "\"%.*s\" ", LIT(android_glue_static_lib)); + } + + for (String object_path : gen->output_object_paths) { object_files = gb_string_append_fmt(object_files, "\"%.*s\" ", LIT(object_path)); } @@ -654,6 +777,7 @@ gb_internal i32 linker_stage(LinkerData *gen) { if (build_context.metrics.os != TargetOs_openbsd && build_context.metrics.os != TargetOs_haiku && build_context.metrics.arch != TargetArch_riscv64 + && !is_android ) { // OpenBSD and Haiku default to PIE executable. do not pass -no-pie for it. link_settings = gb_string_appendc(link_settings, "-no-pie "); @@ -687,30 +811,53 @@ gb_internal i32 linker_stage(LinkerData *gen) { } } + if (is_android) { + GB_ASSERT(ODIN_ANDROID_NDK_TOOLCHAIN_LIB_PATH.len != 0); + GB_ASSERT(ODIN_ANDROID_NDK_TOOLCHAIN_LIB_LEVEL_PATH.len != 0); + GB_ASSERT(ODIN_ANDROID_NDK_TOOLCHAIN_SYSROOT_PATH.len != 0); + + platform_lib_str = gb_string_appendc(platform_lib_str, "\"-L"); + platform_lib_str = gb_string_append_length(platform_lib_str, ODIN_ANDROID_NDK_TOOLCHAIN_LIB_LEVEL_PATH.text, ODIN_ANDROID_NDK_TOOLCHAIN_LIB_LEVEL_PATH.len); + platform_lib_str = gb_string_appendc(platform_lib_str, "\" "); + + platform_lib_str = gb_string_appendc(platform_lib_str, "\"--sysroot="); + platform_lib_str = gb_string_append_length(platform_lib_str, ODIN_ANDROID_NDK_TOOLCHAIN_SYSROOT_PATH.text, ODIN_ANDROID_NDK_TOOLCHAIN_SYSROOT_PATH.len); + platform_lib_str = gb_string_appendc(platform_lib_str, "\" "); + + link_settings = gb_string_appendc(link_settings, "-u ANativeActivity_onCreate "); + } + if (!build_context.no_rpath) { // Set the rpath to the $ORIGIN/@loader_path (the path of the executable), // so that dynamic libraries are looked for at that path. if (build_context.metrics.os == TargetOs_darwin) { link_settings = gb_string_appendc(link_settings, "-Wl,-rpath,@loader_path "); } else { - link_settings = gb_string_appendc(link_settings, "-Wl,-rpath,\\$ORIGIN "); + if (is_android) { + // ignore + } else { + link_settings = gb_string_appendc(link_settings, "-Wl,-rpath,\\$ORIGIN "); + } } } if (!build_context.no_crt) { - platform_lib_str = gb_string_appendc(platform_lib_str, "-lm "); + lib_str = gb_string_appendc(lib_str, "-lm "); if (build_context.metrics.os == TargetOs_darwin) { // NOTE: adding this causes a warning about duplicate libraries, I think it is // automatically assumed/added by clang when you don't do `-nostdlib`. - // platform_lib_str = gb_string_appendc(platform_lib_str, "-lSystem "); + // lib_str = gb_string_appendc(lib_str, "-lSystem "); } else { - platform_lib_str = gb_string_appendc(platform_lib_str, "-lc "); + lib_str = gb_string_appendc(lib_str, "-lc "); } } gbString link_command_line = gb_string_make(heap_allocator(), clang_path); defer (gb_string_free(link_command_line)); + if (is_android) { + link_command_line = gb_string_append_fmt(link_command_line, " --target=aarch64-linux-android%d ", ODIN_ANDROID_API_LEVEL); + } link_command_line = gb_string_appendc(link_command_line, " -Wno-unused-command-line-argument "); link_command_line = gb_string_appendc(link_command_line, object_files); link_command_line = gb_string_append_fmt(link_command_line, " -o \"%.*s\" ", LIT(output_filename)); 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