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-rw-r--r--gcc/config/i386/win32.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/gcc/config/i386/win32.h b/gcc/config/i386/win32.h
index a8b6904cdb0..f6cc4516648 100644
--- a/gcc/config/i386/win32.h
+++ b/gcc/config/i386/win32.h
@@ -71,7 +71,7 @@ Boston, MA 02111-1307, USA. */
#undef CPP_SPEC
#define CPP_SPEC "%(cpp_cpu) %{posix:-D_POSIX_SOURCE} \
%{!mcygwin:-iwithprefixbefore include/mingw32 -D__MINGW32__} \
- %{mcygwin:-D__CYGWIN32__}"
+ %{mcygwin:-D__CYGWIN32__ -D__CYGWIN__}"
/* We have to dynamic link to get to the system DLLs. All of libc, libm and
the Unix stuff is in cygwin.dll. The import library is called