From 12f8f043b75a66d5e6ed13fc7819559f938dad2d Mon Sep 17 00:00:00 2001
From: Tom Tromey <tromey@redhat.com>
Date: Tue, 10 Jun 1997 21:44:33 +0000
Subject: [PATCH] cygwin fix

---
 ChangeLog    |  4 ++++
 m4/cygwin.m4 | 24 +++++++++++++++++-------
 2 files changed, 21 insertions(+), 7 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index d42aca99..a3edfb3d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Tue Jun 10 11:04:16 1997  Tom Tromey  <tromey@cygnus.com>
+
+	* m4/cygwin.m4: Examine output of compiler to see if .exe needed.
+
 Sun Jun  1 13:16:05 1997  Tom Tromey  <tromey@cygnus.com>
 
 	* automake.in (handle_built_sources): Handle PRE_BUILT_SOURCES.
diff --git a/m4/cygwin.m4 b/m4/cygwin.m4
index 0c635f36..00e8fb11 100644
--- a/m4/cygwin.m4
+++ b/m4/cygwin.m4
@@ -3,12 +3,22 @@
 # Otherwise set it to "".
 
 dnl AM_CYGWIN32()
+dnl You might think we can do this by checking for a cygwin32-specific
+dnl cpp define.  We can't, because cross-compilers that target
+dnl cygwin32 don't use the .exe suffix.  I don't know why.
 AC_DEFUN(AM_CYGWIN32,
-[AC_MSG_CHECKING(for Cygwin32 environment)
-AC_EGREP_CPP(lose, [
-#ifdef __CYGWIN32__
-lose
-#endif], [EXEEXT=.exe
-AC_MSG_RESULT(yes)], [EXEEXT=
-AC_MSG_RESULT(no)])
+[AC_CACHE_CHECK(for Cygwin32 environment, am_cv_cygwin32,
+[cat > conftest.$ac_ext << 'EOF'
+int main () {
+/* Nothing.  */
+return 0; }
+EOF
+if AC_TRY_EVAL(ac_link) && test -s conftest.exe; then
+   am_cv_cygwin32=yes
+else
+   am_cv_cygwin32=no
+fi
+rm -f conftest*])
+EXEEXT=
+test "$am_cv_cygwin32" = yes && EXEEXT=.exe
 AC_SUBST(EXEEXT)])
-- 
2.43.5