From b98727318b474b63927f99557ddaed4da4ce7fc5 Mon Sep 17 00:00:00 2001
From: David Gonzalez Martin <davidgmbb@gmail.com>
Date: Thu, 29 May 2025 21:53:37 -0600
Subject: [PATCH] Link LLVM bindings

---
 src/compiler.bbb | 37 ++++++++++++++++++++++++++++++
 src/compiler.cpp | 58 ++++++++++++++++++++++++++++++++++++------------
 2 files changed, 81 insertions(+), 14 deletions(-)

diff --git a/src/compiler.bbb b/src/compiler.bbb
index 2aa9a77..1a608c1 100644
--- a/src/compiler.bbb
+++ b/src/compiler.bbb
@@ -832,6 +832,42 @@ LLVMIntrinsicIndex = enum
     va_copy,
 }
 
+[extern] LLVMInitializeX86TargetInfo = fn [cc(c)] () void;
+[extern] LLVMInitializeX86Target = fn [cc(c)] () void;
+[extern] LLVMInitializeX86TargetMC = fn [cc(c)] () void;
+[extern] LLVMInitializeX86AsmPrinter = fn [cc(c)] () void;
+[extern] LLVMInitializeX86AsmParser = fn [cc(c)] () void;
+[extern] LLVMInitializeX86Disassembler = fn [cc(c)] () void;
+
+[extern] llvm_default_target_triple = fn [cc(c)] () []u8;
+[extern] llvm_host_cpu_name = fn [cc(c)] () []u8;
+[extern] llvm_host_cpu_features = fn [cc(c)] () []u8;
+
+host_triple: []u8 = zero;
+host_cpu_model: []u8 = zero;
+host_cpu_features: []u8 = zero;
+
+llvm_targets_initialized: u1 = 0;
+
+llvm_initialize_targets = fn () void
+{
+    if (!llvm_targets_initialized)
+    {
+        LLVMInitializeX86TargetInfo();
+        LLVMInitializeX86Target();
+        LLVMInitializeX86TargetMC();
+        LLVMInitializeX86AsmPrinter();
+        LLVMInitializeX86AsmParser();
+        LLVMInitializeX86Disassembler();
+
+        host_triple = llvm_default_target_triple();
+        host_cpu_model = llvm_host_cpu_name();
+        host_cpu_features = llvm_host_cpu_features();
+
+        llvm_targets_initialized = 1;
+    }
+}
+
 [extern] LLVMContextCreate = fn [cc(c)] () &LLVMContext;
 
 ModuleLLVM = struct
@@ -2614,6 +2650,7 @@ parse = fn (module: &Module) void
 
 emit = fn (module: &Module) void
 {
+    llvm_initialize_targets();
     >context = LLVMContextCreate();
 }
 
diff --git a/src/compiler.cpp b/src/compiler.cpp
index 241d9d9..83e7881 100644
--- a/src/compiler.cpp
+++ b/src/compiler.cpp
@@ -179,9 +179,8 @@ fn String compile_file(Arena* arena, Compile options)
     };
     Slice<String> object_slice = array_to_slice(objects);
 
-    String c_abi_libraries[] = {
-        string_literal("build/libc_abi.a"),
-    };
+    String c_abi_library = string_literal("build/libc_abi.a");
+    String llvm_bindings_library = string_literal("build/libllvm_bindings.a");
     Slice<String> library_names = {};
     Slice<String> library_paths = {};
     String library_buffer[256];
@@ -199,6 +198,7 @@ fn String compile_file(Arena* arena, Compile options)
         builder.add(arena, arena_join_string(arena, array_to_slice(llvm_config_parts)));
         builder.add("--libdir");
         builder.add("--libs");
+        builder.add("--system-libs");
         auto arguments = builder.flush();
         auto llvm_config = os_execute(arena, arguments, environment, {
             .policies = { ExecuteStandardStreamPolicy::pipe, ExecuteStandardStreamPolicy::ignore },
@@ -226,43 +226,73 @@ fn String compile_file(Arena* arena, Compile options)
         {
             report_error();
         }
-        if (line != stream.length - 1)
-        {
-            report_error();
-        }
 
-        auto library_list = stream(0, line);
+        auto llvm_library_stream = stream(0, line);
+
+        stream = stream(line + 1);
+
         u64 library_count = 0;
 
         while (1)
         {
-            auto space = string_first_character(library_list, ' ');
+            auto space = string_first_character(llvm_library_stream, ' ');
             if (space == string_no_match)
             {
-                auto library_argument = library_list(2);
+                auto library_argument = llvm_library_stream;
+                library_buffer[library_count] = library_argument(2);
+                library_count += 1;
+                break;
+            }
+
+            // Omit the first two characters: "-l"
+            auto library_argument = llvm_library_stream(2, space);
+            library_buffer[library_count] = library_argument;
+            library_count += 1;
+            llvm_library_stream = llvm_library_stream(space + 1);
+        }
+
+        line = string_first_character(stream, '\n');
+        if (line == string_no_match)
+        {
+            report_error();
+        }
+        assert(line == stream.length - 1);
+        auto system_library_stream = stream(0, line);
+
+        while (1)
+        {
+            auto space = string_first_character(system_library_stream, ' ');
+            if (space == string_no_match)
+            {
+                auto library_argument = system_library_stream(2);
                 library_buffer[library_count] = library_argument;
                 library_count += 1;
                 break;
             }
+
             // Omit the first two characters: "-l"
-            auto library_argument = library_list(2, space);
+            auto library_argument = system_library_stream(2, space);
             library_buffer[library_count] = library_argument;
             library_count += 1;
-            library_list = library_list(space + 1);
+            system_library_stream = system_library_stream(space + 1);
         }
 
         library_buffer[library_count] = string_literal("gcc");
         library_count += 1;
         library_buffer[library_count] = string_literal("gcc_s");
         library_count += 1;
-        library_buffer[library_count] = string_literal("m");
+
+        library_buffer[library_count] = string_literal("lldCommon");
+        library_count += 1;
+        library_buffer[library_count] = string_literal("lldELF");
         library_count += 1;
 
         library_names = { library_buffer, library_count };
+        library_paths = { &llvm_bindings_library, 1 };
     }
     else if (base_name.equal(string_literal("c_abi")))
     {
-        library_paths = array_to_slice(c_abi_libraries);
+        library_paths = { &c_abi_library, 1 };
     }
 
     compile(arena, {