From 5b076e4c227cc3d15f823244d728b21acd30aaa4 Mon Sep 17 00:00:00 2001
From: Klaus Aehlig <klaus.aehlig@huawei.com>
Date: Wed, 19 Jun 2024 15:49:11 +0200
Subject: stage-0/gcc: separate gcc.real from wrapping and use compiled wrapper

---
 etc/patches/wrapper.c | 93 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 etc/patches/wrapper.c

(limited to 'etc/patches')

diff --git a/etc/patches/wrapper.c b/etc/patches/wrapper.c
new file mode 100644
index 0000000..ca4f4b1
--- /dev/null
+++ b/etc/patches/wrapper.c
@@ -0,0 +1,93 @@
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+int main(int argc, char** argv) {
+#include "toolname.h"
+#include "link_args.h"
+  char *s, *path, *newpath, *prgdir, *cwd, **newargv, *tool;
+  size_t size, s_s, s_cwd, s_prgdir, s_path, s_toolname;
+  int i;
+
+  for (link_args_c =0; link_args[link_args_c] != NULL; link_args_c++) {}
+
+  if ((prgdir=strdup(argv[0])) == NULL) {
+    return 66;
+  }
+  s = strrchr(prgdir, '/');
+  if (s == NULL) {
+    prgdir = getenv("CC_REAL_DIRECTORY");
+    if (prgdir == NULL) {
+      prgdir = ".";
+    }
+  } else {
+    *s = '\0';
+  }
+
+  if (*prgdir != '/') {
+    /* called by non-absolute path, need to prefix with cwd */
+    for (size = 1024;; size *= 2) {
+      if ((cwd=(char*)malloc(size)) == NULL) {
+        return 66;
+      }
+      if (getcwd(cwd, size) != NULL) {
+        break;
+      }
+      if (errno != ERANGE) {
+        return 66;
+      }
+    }
+    s = prgdir;
+    s_s = strlen(s);
+    s_cwd = strlen(cwd);
+
+    if ((prgdir=(char*)malloc(s_cwd + 1 + s_s + 1))==NULL) {
+      return 66;
+    }
+    strcpy(prgdir, cwd);
+    strcpy(&prgdir[s_cwd], "/");
+    strcpy(&prgdir[s_cwd+1], s);
+  }
+
+  /* prgdir is now our best guess for the directory argv[0] is located in */
+  path = getenv("PATH");
+  if (path == NULL) {
+    path = prgdir;
+  } else {
+    s_path = strlen(path);
+    s_prgdir = strlen(prgdir);
+    if ((newpath=(char*)malloc(s_prgdir + 1 + s_path + 1)) == NULL) {
+      return 66;
+    }
+    strcpy(newpath, prgdir);
+    strcpy(&newpath[s_prgdir], ":");
+    strcpy(&newpath[s_prgdir+1], path);
+    path = newpath;
+  }
+  setenv("PATH", path, 1);
+
+  if ((newargv=(char**)malloc((argc + link_args_c + 1)*sizeof(char*)))==NULL) {
+    return 66;
+  }
+  for (i=0; i<argc; i++) {
+    newargv[i] = argv[i];
+  }
+  for (i=0; i < link_args_c; i++) {
+    newargv[argc+i] = link_args[i];
+  }
+  newargv[argc+link_args_c] = NULL;
+
+  s_prgdir = strlen(prgdir);
+  s_toolname = strlen(toolname);
+  if ((tool=(char*)malloc(s_prgdir+1+s_toolname+1))==NULL) {
+    return 66;
+  }
+  strcpy(tool, prgdir);
+  strcpy(&tool[s_prgdir], "/");
+  strcpy(&tool[s_prgdir+1], toolname);
+
+  execv(tool, newargv);
+
+  return 65; /* exec failed */
+}
-- 
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