[newlib-cygwin] Cygwin: testsuite: link cygload with --disable-high-entropy-va

[Jeremy Drake]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=78b17c4d5110664403dee92ec54b2c4b0c68242c

commit 78b17c4d5110664403dee92ec54b2c4b0c68242c
Author: Jeremy Drake <cygwin@jdrake.com>
Date:   Wed Jul 9 11:06:20 2025 -0700

    Cygwin: testsuite: link cygload with --disable-high-entropy-va
    
    This is a mingw program meant to demonstrate loading the Cygwin dll in a
    non-Cygwin process, but the Cygwin dll still initializes the cygheap on
    load in that case.  Without --disable-high-entropy-va, Windows may
    occasionally locate the PEB, TEB, and/or stacks in the address space
    that Cygwin tries to reserve for the cygheap, resulting in a failure.
    
    Fixes: 60675f1a7eb2 ("Cygwin: decouple shared mem regions from Cygwin DLL")
    Signed-off-by: Jeremy Drake <cygwin@jdrake.com>

Diff:
---
 winsup/testsuite/mingw/Makefile.am | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/winsup/testsuite/mingw/Makefile.am b/winsup/testsuite/mingw/Makefile.am
index 25300a15d..775d617ae 100644
--- a/winsup/testsuite/mingw/Makefile.am
+++ b/winsup/testsuite/mingw/Makefile.am
@@ -23,7 +23,7 @@ cygrun_SOURCES = \
 
 cygload_SOURCES = \
 	../winsup.api/cygload.cc
-cygload_LDFLAGS=-static -Wl,-e,cygloadCRTStartup
+cygload_LDFLAGS=-static -Wl,-e,cygloadCRTStartup -Wl,--disable-high-entropy-va
 
 winchild_SOURCES = \
 	../winsup.api/posix_spawn/winchild.c