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Re: [Qemu-devel] [PATCH V3] vl.c && linux-user/main.c : removed **envp f


From: Yoni Bettan
Subject: Re: [Qemu-devel] [PATCH V3] vl.c && linux-user/main.c : removed **envp from main() arguments
Date: Tue, 19 Dec 2017 15:05:28 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.5.0



On 12/19/2017 12:21 PM, Laurent Vivier wrote:
Le 19/12/2017 à 11:11, Yoni Bettan a écrit :
it was added on 2008 902b3d5c39 when introduced cache-utils.[ch]

since then cache-utils.[ch] were removed but **envp was left
behind.

By the way "to be portable it is best to write main to take two
arguments, and use the value of environ" according to
https://www.gnu.org/software/libc/manual/html_node/Program-\
       Arguments.html#Program-Arguments

Signed-off-by: Yoni Bettan <address@hidden>
---

V2 -> V3:
since ui/cocoa.c rename main() is using qemu_main() ,because it uses it
     inside its main() function, the function qemu_main() can't be removed
V1 -> V2:

     removed the ui/cocoa.c renaming of main() function since i thought that we
     no longer need qemu_main()


  include/qemu-common.h | 2 +-
  linux-user/main.c     | 2 +-
  ui/cocoa.m            | 5 ++---
  vl.c                  | 7 +++----
  4 files changed, 7 insertions(+), 9 deletions(-)

...
diff --git a/vl.c b/vl.c
index fc8bd9372f..ea17cc34f6 100644
--- a/vl.c
+++ b/vl.c
@@ -35,10 +35,10 @@
  #ifdef CONFIG_SDL
  #if defined(__APPLE__) || defined(main)
  #include <SDL.h>
-int qemu_main(int argc, char **argv, char **envp);
+int qemu_main(int argc, char **argv);
  int main(int argc, char **argv)
  {
-    return qemu_main(argc, argv, NULL);
+    return qemu_main(argc, argv);
  }
  #undef main
  #define main qemu_main

I'm really sorry, but I really think we can remove this part.

Can you please show what exact lines you think can be removed?
If you meant that the entire part can be removed then how can
we rename main to qemu_main (in the CONFIG_COCA part) if qemu_main is not defined?

Thanks,
Yoni

This does not break the call of qemu_main from COCOA because we keep:

      48 #ifdef CONFIG_COCOA
      49 #undef main
      50 #define main qemu_main
      51 #endif /* CONFIG_COCOA */

Thanks,
Laurent




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