This patch fixes two issues with LINK_SPEC on Cygwin targets:
1) --tsaware makes sense only for EXEs, not DLLs.
2) Under WoW64 (32-bit Cygwin on 64-bit Windows), Cygwin applications
can access up to 4 GiB of address space (for DLLs, Cygwin heap, mmap()s,
etc.) if they are linked with --large-address-aware. Because of how
Cygwin implements fork(), the ability to use this extra space is a huge
benefit. This flag too is only for EXEs, not DLLs.
Patch attached.
--
Yaakov Selkowitz
Associate Software Engineer, ARM
Red Hat, Inc.
2014-08-12 Yaakov Selkowitz <yselk...@redhat.com>
* config/i386/cygwin.h (LINK_SPEC): Pass --tsaware flag only
when building executables, not DLLs. Add --large-address-aware
under the same conditions.
* config/i386/cygwin-w64.h (LINK_SPEC): Pass --tsaware flag only
when building executables, not DLLs. Add --large-address-aware
under the same conditions when using -m32.
Index: gcc/config/i386/cygwin-w64.h
===================================================================
--- gcc/config/i386/cygwin-w64.h (revision 213759)
+++ gcc/config/i386/cygwin-w64.h (working copy)
@@ -66,7 +66,8 @@
%{static:-Bstatic} %{!static:-Bdynamic} \
%{shared|mdll: " SUB_LINK_ENTRY " --enable-auto-image-base} \
%(shared_libgcc_undefs) \
- --dll-search-prefix=cyg -tsaware"
+ --dll-search-prefix=cyg \
+ %{!shared: %{!mdll: %{" SPEC_32 ":--large-address-aware} --tsaware}}"
/* Cygwin64 will have a 64-bit long type. */
#undef LONG_TYPE_SIZE
Index: gcc/config/i386/cygwin.h
===================================================================
--- gcc/config/i386/cygwin.h (revision 213759)
+++ gcc/config/i386/cygwin.h (working copy)
@@ -120,7 +120,8 @@
%{shared: --shared} %{mdll:--dll} \
%{static:-Bstatic} %{!static:-Bdynamic} \
%{shared|mdll: --enable-auto-image-base -e __cygwin_dll_entry@12} \
- --dll-search-prefix=cyg -tsaware"
+ --dll-search-prefix=cyg \
+ %{!shared: %{!mdll: --large-address-aware --tsaware}}"
/* Binutils does not handle weak symbols from dlls correctly. For now,
do not use them unnecessarily in gthr-posix.h. */
