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Message-ID: <4533BF1A.5080806@drv.nu>
Date: Mon, 16 Oct 2006 13:19:22 -0400
From: Daniel Verkamp <daniel AT drv DOT nu>
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To: djgpp-workers AT delorie DOT com
Subject: Global constructor order patch
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Reply-To: djgpp-workers AT delorie DOT com

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Attached is a patch for DJGPP to execute constructors in LIFO order, to 
match other platforms, like MinGW (gccmain.c) and gcc on Linux 
(libgcc.c/crtstuff.c).  On those platforms, the __CTOR_LIST__ is always 
processed backwards.  Destructor order as implemented in DJGPP now is 
correct (FIFO).

The fix is by Andre Victor (av1ctor AT yahoo DOT com DOT br) of the FreeBASIC 
project - we stumbled across this problem while working on runtime 
initialization problems (the FB runtime's constructor must run before 
any user constructors).

Thanks,
-- Daniel Verkamp <daniel AT drv DOT nu>


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--- crt0/_main.c.orig	2006-10-16 13:15:38.250000000 -0400
+++ crt0/_main.c	2006-10-16 12:22:37.000000000 -0400
@@ -14,6 +14,9 @@
   if (been_there_done_that == __bss_count)
     return;
   been_there_done_that = __bss_count;
-  for (i=0; i<djgpp_last_ctor-djgpp_first_ctor; i++)
+  
+  /* fixed: the global constructors should be called in LIFO order, see libgcc2.c or crtstuff.c */
+  
+  for (i=(djgpp_last_ctor-djgpp_first_ctor)-1; i>=0; i--)
     djgpp_first_ctor[i]();
 }

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