Merge pull request #508 from Wuerfel21/W21-fix-warning-ci

Fix "no_warnings" CI check

Author: totalspectrum

.github/workflows/build_n_test.yml

@@ -49,7 +49,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: make
-        run: make "OPT=-Werror"
+        run: make "OPT=-O2 -Werror"
 
   test_offline:
     runs-on: ubuntu-24.04

mcpp/mcpp_system.c

@@ -333,7 +333,9 @@ void    do_options(
     set_cplus_dir = TRUE;
 
     /* Get current directory for -I option and #pragma once */
-    (void)getcwd( cur_work_dir, PATHMAX);
+    if (!getcwd( cur_work_dir, PATHMAX)) {
+        cfatal("Bug: getcwd returned NULL. (%s)",strerror(errno),0,NULL);
+    }
 #if SYS_FAMILY == SYS_WIN
     bsl2sl( cur_work_dir);
 #endif
@@ -914,7 +916,9 @@ char *NormalizePath(const char *path)
     if (is_full_path(path)) {
         return strdup(path);
     }
-    (void)getcwd(curpath, PATHMAX);
+    if (!getcwd( curpath, PATHMAX)) {
+        cfatal("Bug: getcwd returned NULL. (%s)",strerror(errno),0,NULL);
+    }
     return norm_path(curpath, path, FALSE, FALSE);
 }