Cygwin: disable high-entropy VA for ldh

If ldd is run against a DLL which links to the Cygwin DLL, ldh will end up loading the Cygwin DLL dynamically, much like cygcheck or strace. Addresses: https://cygwin.com/pipermail/cygwin/2024-May/255991.html Fixes: 60675f1 ("Cygwin: decouple shared mem regions from Cygwin DLL") Reviewed-by: Ken Brown <[email protected]>, Takashi Yano <[email protected]> Signed-off-by: Jeremy Drake <[email protected]>
RTEMS · Jun 2, 2024 · 84dff09 · 84dff09
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diff --git a/winsup/cygwin/release/3.5.4 b/winsup/cygwin/release/3.5.4
@@ -12,3 +12,6 @@ Fixes:
 - Fix regression of pthread::once() introduced in 3.5.0 (i.e., the race
   issue regarding destroying mutex).
   Addresses: https://cygwin.com/pipermail/cygwin/2024-May/255987.html
+
+- Fix a problem that ldd command against cygwin DLLs sometimes hangs.
+  Addresses: https://cygwin.com/pipermail/cygwin/2024-May/255991.html
diff --git a/winsup/utils/mingw/Makefile.am b/winsup/utils/mingw/Makefile.am
@@ -38,6 +38,7 @@ cygcheck_LDADD = -lz -lwininet -lshlwapi -lpsapi -lntdll
 cygwin_console_helper_SOURCES = cygwin-console-helper.cc
 
 ldh_SOURCES = ldh.cc
+ldh_LDFLAGS = ${AM_LDFLAGS} -Wl,--disable-high-entropy-va
 
 strace_SOURCES = \
 	path.cc \