AppRun.c.patch

--- a/AppRun.c
+++ b/AppRun.c
@@ -164,6 +164,9 @@
     char *old_env;
     size_t length;
     const char *format;
+    checkrt(usr_in_appdir);
+    if (optional_ld_preload)
+        putenv(optional_ld_preload);
 
     /* https://docs.python.org/2/using/cmdline.html#envvar-PYTHONHOME */
     SET_NEW_ENV(new_pythonhome, appdir_s, "PYTHONHOME=%s/usr/", appdir);
@@ -171,8 +174,61 @@
     old_env = getenv("PATH") ?: "";
     SET_NEW_ENV(new_path, appdir_s*5 + strlen(old_env), "PATH=%s/usr/bin/:%s/usr/sbin/:%s/usr/games/:%s/bin/:%s/sbin/:%s", appdir, appdir, appdir, appdir, appdir, old_env);
 
+    int doUseBuiltinSTDCPP = true;
+    // we don't want stdout, only stderr
+    FILE *fp = popen("./optional/checker 2>&1 >/dev/null", "r");
+    if (fp != NULL)
+    {
+        char errorStr[1035];
+        fgets(errorStr, sizeof(errorStr), fp);
+        const char* searchStr = "*libstdc++*version `*' not found (required by";
+        int searchStrI = 0;
+        int errorStrI = 0;
+        int lastWildcard = 0;
+        while (searchStrI < strlen(searchStr))
+        {
+            if (errorStrI >= strlen(errorStr))
+            {
+                doUseBuiltinSTDCPP = false;
+                break;
+            }
+            if (errorStr[errorStrI] == searchStr[searchStrI])
+            {
+                errorStrI++;
+                searchStrI++;
+            }
+            else if (searchStr[searchStrI] == '*')
+            {
+                if (errorStr[errorStrI] == searchStr[searchStrI+1])
+                {
+                    if (lastWildcard == 0)
+                        lastWildcard = searchStrI;
+                    searchStrI++;
+                }
+                else
+                {
+                    errorStrI++;
+                }
+            }
+            else
+            {
+                searchStrI = lastWildcard;
+                lastWildcard = 0;
+            }
+        }
+        
+    }
+    else
+    {
+        doUseBuiltinSTDCPP = false;
+    }
+    
     old_env = getenv("LD_LIBRARY_PATH") ?: "";
     SET_NEW_ENV(new_ld_library_path, appdir_s*10 + strlen(old_env), "LD_LIBRARY_PATH=%s/usr/lib/:%s/usr/lib/i386-linux-gnu/:%s/usr/lib/x86_64-linux-gnu/:%s/usr/lib32/:%s/usr/lib64/:%s/lib/:%s/lib/i386-linux-gnu/:%s/lib/x86_64-linux-gnu/:%s/lib32/:%s/lib64/:%s", appdir, appdir, appdir, appdir, appdir, appdir, appdir, appdir, appdir, appdir, old_env);
+    if (doUseBuiltinSTDCPP)
+    {
+        SET_NEW_ENV(new_ld_library_path, strlen(optional_ld_library_path) + appdir_s*10 + strlen(old_env), "LD_LIBRARY_PATH=%s%s/usr/lib/:%s/usr/lib/i386-linux-gnu/:%s/usr/lib/x86_64-linux-gnu/:%s/usr/lib32/:%s/usr/lib64/:%s/lib/:%s/lib/i386-linux-gnu/:%s/lib/x86_64-linux-gnu/:%s/lib32/:%s/lib64/:%s", optional_ld_library_path, appdir, appdir, appdir, appdir, appdir, appdir, appdir, appdir, appdir, appdir, old_env);
+    }
 
     old_env = getenv("PYTHONPATH") ?: "";
     SET_NEW_ENV(new_pythonpath, appdir_s + strlen(old_env), "PYTHONPATH=%s/usr/share/pyshared/:%s", appdir, old_env);
@@ -201,6 +257,9 @@
     if (ret == -1)
         die("Error executing '%s': %s\n", exe, strerror(error));
 
+    free(optional_ld_library_path);
+    if (optional_ld_preload)
+        free(optional_ld_preload);
     free(line);
     free(desktop_file);
     free(usr_in_appdir);