From 87a91b25e50eb2e64e6bfee72875844f4e6bf34e Mon Sep 17 00:00:00 2001
From: Christoffer Lerno <christoffer@aegik.com>
Date: Sat, 15 May 2021 03:20:41 +0200
Subject: [PATCH] Add --version and -V

---
 src/build/build_options.c   | 28 ++++++++++++++++++++++++----
 src/build/build_options.h   |  2 ++
 src/compiler/llvm_codegen.c |  3 ++-
 src/compiler/target.c       |  2 +-
 src/main.c                  |  3 +--
 5 files changed, 30 insertions(+), 8 deletions(-)

diff --git a/src/build/build_options.c b/src/build/build_options.c
index ffe586bd5..16b9c291e 100644
--- a/src/build/build_options.c
+++ b/src/build/build_options.c
@@ -10,16 +10,15 @@
 #include <stdbool.h>
 #include <string.h>
 #include <utils/lib.h>
-
-
-
-
+#include "../utils/whereami.h"
 
 
 static int arg_index;
 static int arg_count;
 static const char** args;
 static const char* current_arg;
+extern const char* llvm_version;
+extern const char* llvm_target;
 
 char *arch_os_target[ARCH_OS_TARGET_LAST + 1] = {
 		[X86_FREEBSD] = "x86_freebsd",
@@ -69,6 +68,7 @@ static void usage(void)
 	OUTPUT("  --template <template> - Use a different template: \"lib\", \"staticlib\" or a path.");
 	OUTPUT("  --about               - Prints a short description of C3.");
 	OUTPUT("  --symtab <value>      - Sets the preferred symtab size.");
+	OUTPUT("  -V --version          - Print version information.");
 	OUTPUT("  -E                    - Lex only.");
 	OUTPUT("  -P                    - Only parse and output the AST as S-expressions.");
 	OUTPUT("  -O0                   - Optimizations off.");
@@ -248,10 +248,25 @@ static void print_all_targets(void)
 	}
 }
 
+static void print_version(void)
+{
+	OUTPUT("C3 Compiler Version:   Pre-alpha %s", COMPILER_VERSION);
+	OUTPUT("Installed directory:   %s", find_executable_path());
+	OUTPUT("LLVM version:          %s", llvm_version);
+	OUTPUT("LLVM default target:   %s", llvm_target);
+}
+
 static void parse_option(BuildOptions *options)
 {
 	switch (current_arg[1])
 	{
+		case 'V':
+			if (match_shortopt("V"))
+			{
+				print_version();
+				exit(EXIT_SUCCESS);
+			}
+			break;
 		case 'g':
 			if (match_shortopt("gline-tables-only"))
 			{
@@ -352,6 +367,11 @@ static void parse_option(BuildOptions *options)
 			options->compile_option = COMPILE_LEX_PARSE_ONLY;
 			return;
 		case '-':
+			if (match_longopt("version"))
+			{
+				print_version();
+				exit(EXIT_SUCCESS);
+			}
 			if (match_longopt("about"))
 			{
 				OUTPUT("The C3 Compiler");
diff --git a/src/build/build_options.h b/src/build/build_options.h
index 9103c84ac..87040e75f 100644
--- a/src/build/build_options.h
+++ b/src/build/build_options.h
@@ -9,6 +9,8 @@
 #define MAX_LIB_DIRS 1024
 #define MAX_FILES 2048
 
+#define COMPILER_VERSION "A218"
+
 typedef enum
 {
 	COMMAND_MISSING = 0,
diff --git a/src/compiler/llvm_codegen.c b/src/compiler/llvm_codegen.c
index f8d187098..8d5064546 100644
--- a/src/compiler/llvm_codegen.c
+++ b/src/compiler/llvm_codegen.c
@@ -4,7 +4,8 @@
 
 #include "llvm_codegen_internal.h"
 
-
+const char* llvm_version = LLVM_VERSION_STRING;
+const char* llvm_target = LLVM_DEFAULT_TARGET_TRIPLE;
 
 static void diagnostics_handler(LLVMDiagnosticInfoRef ref, void *context)
 {
diff --git a/src/compiler/target.c b/src/compiler/target.c
index 463544262..13bb756d5 100644
--- a/src/compiler/target.c
+++ b/src/compiler/target.c
@@ -1083,7 +1083,7 @@ void target_setup(BuildTarget *target)
 
 	if (target->arch_os_target == ARCH_OS_TARGET_DEFAULT)
 	{
-		platform_target.target_triple = LLVMGetDefaultTargetTriple();
+		platform_target.target_triple = LLVM_DEFAULT_TARGET_TRIPLE;
 	}
 	else
 	{
diff --git a/src/main.c b/src/main.c
index 346cef970..67ef41b95 100644
--- a/src/main.c
+++ b/src/main.c
@@ -5,7 +5,6 @@
 #include "compiler_tests/tests.h"
 #include "utils/lib.h"
 
-static int version = 102;
 int main(int argc, const char *argv[])
 {
 	// First setup memory
@@ -13,7 +12,7 @@ int main(int argc, const char *argv[])
 
 
 
-	DEBUG_LOG("Version: %d", version);
+	DEBUG_LOG("Version: %s", COMPILER_VERSION);
 
 
 	// Parse arguments.