[PATCH] termios: fix compilation on mingw

[Eric Blake]

* m4/termios_h.m4 (gl_TERMIOS_H_DEFAULTS): Set default.
(gl_TERMIOS_H): Adjust it on mingw.
* modules/termios (Makefile.am): Substitute new key.
* lib/termios.in.h (includes): Make include_next conditional.
* doc/posix-headers/termios.texi (termios.h): Update
documentation.
Reported by Daniel P. Berrange.

Signed-off-by: Eric Blake <address@hidden>
---

>> The gnulib replacement is doing an include_next<termios.h>  but there
>> is no next one to include.
>Then that's a bug in the gnulib replacement.  I'll probably be able to
>fix that today.

Tested this on a cygwin->mingw cross compile.

 ChangeLog                      |   11 +++++++++++
 doc/posix-headers/termios.texi |    6 +++---
 lib/termios.in.h               |    4 +++-
 m4/termios_h.m4                |    6 ++++++
 modules/termios                |    1 +
 5 files changed, 24 insertions(+), 4 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 9a4ed57..acb1934 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,14 @@
+2010-10-13  Eric Blake  <address@hidden>
+
+       termios: fix compilation on mingw
+       * m4/termios_h.m4 (gl_TERMIOS_H_DEFAULTS): Set default.
+       (gl_TERMIOS_H): Adjust it on mingw.
+       * modules/termios (Makefile.am): Substitute new key.
+       * lib/termios.in.h (includes): Make include_next conditional.
+       * doc/posix-headers/termios.texi (termios.h): Update
+       documentation.
+       Reported by Daniel P. Berrange.
+
 2010-10-13  Jim Meyering  <address@hidden>

        git-version-gen: don't require that .git/ be in the current dir
diff --git a/doc/posix-headers/termios.texi b/doc/posix-headers/termios.texi
index cf9c24b..7f5b670 100644
--- a/doc/posix-headers/termios.texi
+++ b/doc/posix-headers/termios.texi
@@ -7,11 +7,11 @@ termios.h

 Portability problems fixed by Gnulib:
 @itemize
address@hidden
+This header file is missing on some platforms:
+mingw.
 @end itemize

 Portability problems not fixed by Gnulib:
 @itemize
address@hidden
-This header file is missing on some platforms:
-mingw.
 @end itemize
diff --git a/lib/termios.in.h b/lib/termios.in.h
index 5728ab6..10ef3e7 100644
--- a/lib/termios.in.h
+++ b/lib/termios.in.h
@@ -23,7 +23,9 @@
 @PRAGMA_COLUMNS@

 /* The include_next requires a split double-inclusion guard.  */
address@hidden@ @NEXT_TERMIOS_H@
+#if @HAVE_TERMIOS_H@
+# @INCLUDE_NEXT@ @NEXT_TERMIOS_H@
+#endif

 #ifndef _GL_TERMIOS_H
 #define _GL_TERMIOS_H
diff --git a/m4/termios_h.m4 b/m4/termios_h.m4
index d6b3c06..151cc4f 100644
--- a/m4/termios_h.m4
+++ b/m4/termios_h.m4
@@ -12,6 +12,11 @@ AC_DEFUN([gl_TERMIOS_H],

   gl_CHECK_NEXT_HEADERS([termios.h])

+  AC_CHECK_HEADERS_ONCE([termios.h])
+  if test $ac_cv_header_termios_h != yes; then
+    HAVE_TERMIOS_H=0
+  fi
+
   dnl Check for declarations of anything we want to poison if the
   dnl corresponding gnulib module is not in use, and which is not
   dnl guaranteed by C89.
@@ -33,4 +38,5 @@ AC_DEFUN([gl_TERMIOS_H_DEFAULTS],
   GNULIB_TCGETSID=0;      AC_SUBST([GNULIB_TCGETSID])
   dnl Assume proper GNU behavior unless another module says otherwise.
   HAVE_TCGETSID=1;        AC_SUBST([HAVE_TCGETSID])
+  HAVE_TERMIOS_H=1;       AC_SUBST([HAVE_TERMIOS_H])
 ])
diff --git a/modules/termios b/modules/termios
index 2930c1a..8c9ceba 100644
--- a/modules/termios
+++ b/modules/termios
@@ -27,6 +27,7 @@ termios.h: termios.in.h $(CXXDEFS_H) $(WARN_ON_USE_H)
              -e 's|@''NEXT_TERMIOS_H''@|$(NEXT_TERMIOS_H)|g' \
              -e 's|@''GNULIB_TCGETSID''@|$(GNULIB_TCGETSID)|g' \
              -e 's|@''HAVE_TCGETSID''@|$(HAVE_TCGETSID)|g' \
+             -e 's|@''HAVE_TERMIOS_H''@|$(HAVE_TERMIOS_H)|g' \
              -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
              -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
            < $(srcdir)/termios.in.h; \
-- 
1.7.2.3