From 64d0960244a219526fc100b17f4ecd26223df496 Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Mon, 6 Apr 2020 19:13:36 -0400
Subject: [PATCH] zig cc: recognize a few more linker options

 * `--major-image-version`
 * `--minor-image-version`
 * `--stack`
---
 src/all_types.hpp |  1 +
 src/codegen.cpp   |  1 +
 src/link.cpp      |  6 ++++--
 src/main.cpp      | 23 +++++++++++++++++++++++
 4 files changed, 29 insertions(+), 2 deletions(-)

diff --git a/src/all_types.hpp b/src/all_types.hpp
index 9b22279b91..650dcfd0c7 100644
--- a/src/all_types.hpp
+++ b/src/all_types.hpp
@@ -2259,6 +2259,7 @@ struct CodeGen {
     size_t version_minor;
     size_t version_patch;
     const char *linker_script;
+    size_t stack_size_override;
 
     BuildMode build_mode;
     OutType out_type;
diff --git a/src/codegen.cpp b/src/codegen.cpp
index a2cd5fafc0..7de26e0b6d 100644
--- a/src/codegen.cpp
+++ b/src/codegen.cpp
@@ -10597,6 +10597,7 @@ static Error check_cache(CodeGen *g, Buf *manifest_dir, Buf *digest) {
     cache_int(ch, g->linker_allow_shlib_undefined);
     cache_bool(ch, g->linker_z_nodelete);
     cache_bool(ch, g->linker_z_defs);
+    cache_usize(ch, g->stack_size_override);
 
     // gen_c_objects appends objects to g->link_objects which we want to include in the hash
     gen_c_objects(g);
diff --git a/src/link.cpp b/src/link.cpp
index 4ee8915e55..439b76a756 100644
--- a/src/link.cpp
+++ b/src/link.cpp
@@ -1840,7 +1840,8 @@ static void construct_linker_job_elf(LinkJob *lj) {
 
     if (g->out_type == OutTypeExe) {
         lj->args.append("-z");
-        lj->args.append("stack-size=16777216"); // default to 16 MiB
+        size_t stack_size = (g->stack_size_override == 0) ? 16777216 : g->stack_size_override;
+        lj->args.append(buf_ptr(buf_sprintf("stack-size=%" ZIG_PRI_usize, stack_size)));
     }
 
     if (g->linker_script) {
@@ -2479,7 +2480,8 @@ static void construct_linker_job_coff(LinkJob *lj) {
 
     if (g->out_type == OutTypeExe) {
         // TODO compile time stack upper bound detection
-        lj->args.append("-STACK:16777216");
+        size_t stack_size = (g->stack_size_override == 0) ? 16777216 : g->stack_size_override;
+        lj->args.append(buf_ptr(buf_sprintf("-STACK:%" ZIG_PRI_usize, stack_size)));
     }
 
     coff_append_machine_arg(g, &lj->args);
diff --git a/src/main.cpp b/src/main.cpp
index a2d7577a74..8805382f37 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -453,6 +453,7 @@ static int main0(int argc, char **argv) {
     OptionalBool linker_allow_shlib_undefined = OptionalBoolNull;
     bool linker_z_nodelete = false;
     bool linker_z_defs = false;
+    size_t stack_size_override = 0;
 
     ZigList<const char *> llvm_argv = {0};
     llvm_argv.append("zig (LLVM option parsing)");
@@ -848,6 +849,27 @@ static int main0(int argc, char **argv) {
                 } else {
                     fprintf(stderr, "warning: unsupported linker arg: -z %s\n", buf_ptr(z_arg));
                 }
+            } else if (buf_eql_str(arg, "--major-image-version")) {
+                i += 1;
+                if (i >= linker_args.length) {
+                    fprintf(stderr, "expected linker arg after '%s'\n", buf_ptr(arg));
+                    return EXIT_FAILURE;
+                }
+                ver_major = atoi(buf_ptr(linker_args.at(i)));
+            } else if (buf_eql_str(arg, "--minor-image-version")) {
+                i += 1;
+                if (i >= linker_args.length) {
+                    fprintf(stderr, "expected linker arg after '%s'\n", buf_ptr(arg));
+                    return EXIT_FAILURE;
+                }
+                ver_minor = atoi(buf_ptr(linker_args.at(i)));
+            } else if (buf_eql_str(arg, "--stack")) {
+                i += 1;
+                if (i >= linker_args.length) {
+                    fprintf(stderr, "expected linker arg after '%s'\n", buf_ptr(arg));
+                    return EXIT_FAILURE;
+                }
+                stack_size_override = atoi(buf_ptr(linker_args.at(i)));
             } else {
                 fprintf(stderr, "warning: unsupported linker arg: %s\n", buf_ptr(arg));
             }
@@ -1573,6 +1595,7 @@ static int main0(int argc, char **argv) {
             g->linker_allow_shlib_undefined = linker_allow_shlib_undefined;
             g->linker_z_nodelete = linker_z_nodelete;
             g->linker_z_defs = linker_z_defs;
+            g->stack_size_override = stack_size_override;
 
             if (override_soname) {
                 g->override_soname = buf_create_from_str(override_soname);