Initialize n to 0

gcc 9.1.0 fails to compile with -Werror and -O3 because it detects that `n` might be used uninitialize in line `if (n != scheme_version) {` We do know that `n` will be initialized in `if (zget_uptr(file, &n) != 0) {` but gcc doesn't know that unless compiled with LTO.
gongchengra · Sep 26, 2019 · 5e3cfac · 5e3cfac
1 parent ed4b7cf
commit 5e3cfac
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Showing 2 changed files with 4 additions and 1 deletion.
diff --git a/LOG b/LOG
@@ -1759,3 +1759,5 @@
 - used with-object-file to restore accidentally dropped close-port in
   compile-whole-program and compile-whole-library
     compile.ss
+- initialized variable to enable compilation with 9.1.0 at -O3
+    c/scheme.c
diff --git a/c/scheme.c b/c/scheme.c
@@ -572,7 +572,8 @@ static void check_boot_file_state PROTO((const char *who));
 
 static IBOOL find_boot(name, ext, fd, errorp) const char *name, *ext; int fd; IBOOL errorp; {
   char pathbuf[PATH_MAX], buf[PATH_MAX];
-  uptr n; INT c;
+  uptr n = 0;
+  INT c;
   const char *path;
 #ifdef WIN32
   wchar_t *expandedpath;