--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,33 @@
 2010-10-12  Gary V. Vaughan  <gary@gnu.org>
 
+	add _HEADERS primaries to Makefile.am snippets for installable headers
+	* modules/alloca-opt, modules/arg-nonnull, modules/argz,
+	modules/arpa_inet, modules/byteswap, modules/c++defs, modules/ctype,
+	modules/dirent, modules/errno, modules/fcntl-h, modules/float,
+	modules/fnmatch, modules/getopt-posix, modules/glob, modules/iconv-h,
+	modules/iconv_open, modules/inttypes, modules/langinfo,
+	modules/link-warning, modules/locale, modules/math, modules/netdb,
+	modules/netinet_in, modules/poll-h, modules/pthread, modules/pty,
+	modules/sched, modules/search, modules/selinux-h, modules/signal,
+	modules/spawn, modules/stdarg, modules/stdbool, modules/stddef,
+	modules/stdint, modules/stdio, modules/stdlib, modules/string,
+	modules/strings, modules/sys_file, modules/sys_ioctl,
+	modules/sys_select, modules/sys_socket, modules/sys_stat,
+	modules/sys_time, modules/sys_times, modules/sys_utsname,
+	modules/sys_wait, modules/sysexits, modules/termios, modules/time,
+	modules/unistd, modules/unitypes, modules/unused-parameter,
+	modules/warn-on-use, modules/wchar, modules/wctype (Makefile.am):
+	Add nodist_include_HEADERS, nobase_nodist_include_HEADERS and
+	EXTRA_HEADERS declarations for potentially installable header files.
+	* gnulib-tool: Initialize nodist_include_HEADERS,
+	nobase_nodist_include_HEADERS and EXTRA_HEADERS to prime for new
+	`.*_HEADERS +=' declarations.
+	(func_emit_lib_Makefile_am): Edit away new nodist_include_HEADERS,
+	nobase_nodist_include_HEADERS and EXTRA_HEADERS declarations by
+	default, reverting the Makefile.am snippets above to their original
+	condition prior to this change *unless* the gnulib library is being
+	installed.
+
 	New module `libposix'.
 	* modules/libposix: New module to facilitate an installable
 	library of posix modules.

--- a/gnulib-tool
+++ b/gnulib-tool
@@ -2872,6 +2872,8 @@
   echo
   if test -z "$makefile_name"; then
     echo "SUBDIRS ="
+    echo "nodist_include_HEADERS ="
+    echo "nobase_nodist_include_HEADERS ="
     echo "noinst_HEADERS ="
     echo "noinst_LIBRARIES ="
     echo "noinst_LTLIBRARIES ="
@@ -2881,6 +2883,7 @@
       echo "pkgdata_DATA ="
     fi
     echo "EXTRA_DIST ="
+    echo "EXTRA_HEADERS ="
     echo "BUILT_SOURCES ="
     echo "SUFFIXES ="
   fi
@@ -2920,11 +2923,18 @@
           && test -f "$sourcebase/Makefile.am" \
           && LC_ALL=C grep "^[a-zA-Z0-9_]*_${perhapsLT}LIBRARIES *+\{0,1\}= *$libname\\.$libext\$" "$sourcebase/Makefile.am" > /dev/null; \
         }; then
+    # Install associated header files, per module Makefile.am snippets.
+    sed_transform_HEADERS_primaries="$sed_noop"
     # One of the snippets or the user's Makefile.am already specifies an
     # installation location for the library. Don't confuse automake by saying
     # it should not be installed.
     :
   else
+    # Don't install header files when generated library is not installed.
+    sed_transform_HEADERS_primaries="\
+        /^\(nobase_\)\{0,1\}nodist_include_HEADERS *=.*$/d
+        /^EXTRA_HEADERS *=.*$/d
+    "
     # By default, the generated library should not be installed.
     echo "noinst_${perhapsLT}LIBRARIES += $libname.$libext"
   fi
@@ -2956,7 +2966,8 @@
     echo
   fi
   cat "$tmp"/allsnippets \
-    | sed -e 's|\$(top_srcdir)/build-aux/|$(top_srcdir)/'"$auxdir"'/|g'
+    | sed -e 's|\$(top_srcdir)/build-aux/|$(top_srcdir)/'"$auxdir"'/|g' \
+          -e "$sed_transform_HEADERS_primaries"
   echo
   echo "mostlyclean-local: mostlyclean-generic"
   echo "	@for dir in '' \$(MOSTLYCLEANDIRS); do \\"
@@ -3170,6 +3181,8 @@
   if ! $for_test; then
     echo "check_PROGRAMS ="
   fi
+  echo "nodist_include_HEADERS ="
+  echo "nobase_nodist_include_HEADERS ="
   echo "noinst_HEADERS ="
   echo "noinst_LIBRARIES ="
   if $use_libtests; then
@@ -3185,6 +3198,7 @@
     echo "pkgdata_DATA ="
   fi
   echo "EXTRA_DIST ="
+  echo "EXTRA_HEADERS ="
   echo "BUILT_SOURCES ="
   echo "SUFFIXES ="
   echo "MOSTLYCLEANFILES = core *.stackdump"

--- a/modules/alloca-opt
+++ b/modules/alloca-opt
@@ -13,6 +13,9 @@
 gl_FUNC_ALLOCA
 
 Makefile.am:
+nodist_include_HEADERS += $(ALLOCA_H)
+EXTRA_HEADERS += alloca.h
+
 BUILT_SOURCES += $(ALLOCA_H)
 
 # We need the following in order to create <alloca.h> when the system

--- a/modules/arg-nonnull
+++ b/modules/arg-nonnull
@@ -12,6 +12,8 @@
 configure.ac:
 
 Makefile.am:
+nodist_include_HEADERS += arg-nonnull.h
+
 # The BUILT_SOURCES created by this Makefile snippet are not used via #include
 # statements but through direct file reference. Therefore this snippet must be
 # present in all Makefile.am that need it. This is ensured by the applicability

--- a/modules/argz
+++ b/modules/argz
@@ -18,6 +18,9 @@
 gl_FUNC_ARGZ
 
 Makefile.am:
+nodist_include_HEADERS += $(ARGZ_H)
+EXTRA_HEADERS += argz.h
+
 BUILT_SOURCES += $(ARGZ_H)
 
 # We need the following in order to create <argz.h> when the system

--- a/modules/arpa_inet
+++ b/modules/arpa_inet
@@ -16,6 +16,8 @@
 AC_PROG_MKDIR_P
 
 Makefile.am:
+nobase_nodist_include_HEADERS += arpa/inet.h
+
 BUILT_SOURCES += arpa/inet.h
 
 # We need the following in order to create <arpa/inet.h> when the system

--- a/modules/byteswap
+++ b/modules/byteswap
@@ -11,6 +11,9 @@
 gl_BYTESWAP
 
 Makefile.am:
+nodist_include_HEADERS += $(BYTESWAP_H)
+EXTRA_HEADERS += byteswap.h
+
 BUILT_SOURCES += $(BYTESWAP_H)
 
 # We need the following in order to create <byteswap.h> when the system

--- a/modules/c++defs
+++ b/modules/c++defs
@@ -12,6 +12,8 @@
 configure.ac:
 
 Makefile.am:
+nodist_include_HEADERS += c++defs.h
+
 # The BUILT_SOURCES created by this Makefile snippet are not used via #include
 # statements but through direct file reference. Therefore this snippet must be
 # present in all Makefile.am that need it. This is ensured by the applicability

--- a/modules/ctype
+++ b/modules/ctype
@@ -14,6 +14,8 @@
 gl_CTYPE_H
 
 Makefile.am:
+nodist_include_HEADERS += ctype.h
+
 BUILT_SOURCES += ctype.h
 
 # We need the following in order to create <ctype.h> when the system

--- a/modules/dirent
+++ b/modules/dirent
@@ -16,6 +16,8 @@
 gl_DIRENT_H
 
 Makefile.am:
+nodist_include_HEADERS += dirent.h
+
 BUILT_SOURCES += dirent.h
 
 # We need the following in order to create <dirent.h> when the system

--- a/modules/errno
+++ b/modules/errno
@@ -12,6 +12,9 @@
 gl_HEADER_ERRNO_H
 
 Makefile.am:
+nodist_include_HEADERS += $(ERRNO_H)
+EXTRA_HEADERS += errno.h
+
 BUILT_SOURCES += $(ERRNO_H)
 
 # We need the following in order to create <errno.h> when the system

--- a/modules/fcntl-h
+++ b/modules/fcntl-h
@@ -18,6 +18,8 @@
 gl_FCNTL_H
 
 Makefile.am:
+nodist_include_HEADERS += fcntl.h
+
 BUILT_SOURCES += fcntl.h
 
 # We need the following in order to create <fcntl.h> when the system

--- a/modules/float
+++ b/modules/float
@@ -12,6 +12,9 @@
 gl_FLOAT_H
 
 Makefile.am:
+nodist_include_HEADERS += $(FLOAT_H)
+EXTRA_HEADERS += float.h
+
 BUILT_SOURCES += $(FLOAT_H)
 
 # We need the following in order to create <float.h> when the system

--- a/modules/fnmatch
+++ b/modules/fnmatch
@@ -24,6 +24,9 @@
 gl_FUNC_FNMATCH_POSIX
 
 Makefile.am:
+nodist_include_HEADERS += $(FNMATCH_H)
+EXTRA_HEADERS += fnmatch.h
+
 BUILT_SOURCES += $(FNMATCH_H)
 
 # We need the following in order to create <fnmatch.h> when the system

--- a/modules/getopt-posix
+++ b/modules/getopt-posix
@@ -19,6 +19,9 @@
 gl_FUNC_GETOPT_POSIX
 
 Makefile.am:
+nodist_include_HEADERS += $(GETOPT_H)
+EXTRA_HEADERS += getopt.h
+
 BUILT_SOURCES += $(GETOPT_H)
 
 # We need the following in order to create <getopt.h> when the system

--- a/modules/glob
+++ b/modules/glob
@@ -30,6 +30,9 @@
 gl_GLOB
 
 Makefile.am:
+nodist_include_HEADERS += $(GLOB_H)
+EXTRA_HEADERS += glob.h
+
 BUILT_SOURCES += $(GLOB_H)
 
 # We need the following in order to create <glob.h> when the system

--- a/modules/iconv-h
+++ b/modules/iconv-h
@@ -15,6 +15,9 @@
 gl_ICONV_H
 
 Makefile.am:
+nodist_include_HEADERS += $(ICONV_H)
+EXTRA_HEADERS += iconv.h
+
 BUILT_SOURCES += $(ICONV_H)
 
 # We need the following in order to create <iconv.h> when the system

--- a/modules/iconv_open
+++ b/modules/iconv_open
@@ -22,6 +22,7 @@
 
 Makefile.am:
 iconv_headers = iconv_open-aix.h iconv_open-hpux.h iconv_open-irix.h iconv_open-osf.h iconv_open-solaris.h
+nodist_include_HEADERS += $(iconv_headers)
 
 iconv_open-aix.h: iconv_open-aix.gperf
 	$(GPERF) -m 10 $(srcdir)/iconv_open-aix.gperf > $(srcdir)/iconv_open-aix.h-t

--- a/modules/inttypes
+++ b/modules/inttypes
@@ -17,6 +17,8 @@
 gl_INTTYPES_H
 
 Makefile.am:
+nodist_include_HEADERS += inttypes.h
+
 BUILT_SOURCES += inttypes.h
 
 # We need the following in order to create <inttypes.h> when the system

--- a/modules/langinfo
+++ b/modules/langinfo
@@ -15,6 +15,8 @@
 gl_LANGINFO_H
 
 Makefile.am:
+nodist_include_HEADERS += langinfo.h
+
 BUILT_SOURCES += langinfo.h
 
 # We need the following in order to create an empty placeholder for

--- a/modules/link-warning
+++ b/modules/link-warning
@@ -12,6 +12,8 @@
 configure.ac:
 
 Makefile.am:
+nodist_include_HEADERS += link-warning.h
+
 # The BUILT_SOURCES created by this Makefile snippet are not used via #include
 # statements but through direct file reference. Therefore this snippet must be
 # present in all Makefile.am that need it. This is ensured by the applicability

--- a/modules/locale
+++ b/modules/locale
@@ -17,6 +17,8 @@
 gl_LOCALE_H
 
 Makefile.am:
+nodist_include_HEADERS += locale.h
+
 BUILT_SOURCES += locale.h
 
 # We need the following in order to create <locale.h> when the system

--- a/modules/math
+++ b/modules/math
@@ -15,6 +15,8 @@
 gl_MATH_H
 
 Makefile.am:
+nodist_include_HEADERS += math.h
+
 BUILT_SOURCES += math.h
 
 # We need the following in order to create <math.h> when the system

--- a/modules/netdb
+++ b/modules/netdb
@@ -16,6 +16,8 @@
 gl_HEADER_NETDB
 
 Makefile.am:
+nodist_include_HEADERS += netdb.h
+
 BUILT_SOURCES += netdb.h
 
 # We need the following in order to create <netdb.h> when the system

--- a/modules/netinet_in
+++ b/modules/netinet_in
@@ -14,6 +14,9 @@
 AC_PROG_MKDIR_P
 
 Makefile.am:
+nobase_nodist_include_HEADERS += $(NETINET_IN_H)
+EXTRA_HEADERS += netinet/in.h
+
 BUILT_SOURCES += $(NETINET_IN_H)
 
 # We need the following in order to create <netinet/in.h> when the system

--- a/modules/poll-h
+++ b/modules/poll-h
@@ -15,6 +15,8 @@
 gl_POLL_H
 
 Makefile.am:
+nodist_include_HEADERS += poll.h
+
 BUILT_SOURCES += poll.h
 
 # We need the following in order to create <poll.h> when the system

--- a/modules/pthread
+++ b/modules/pthread
@@ -13,6 +13,9 @@
 gl_PTHREAD_CHECK
 
 Makefile.am:
+nodist_include_HEADERS += $(PTHREAD_H)
+EXTRA_HEADERS += pthread.h
+
 BUILT_SOURCES += $(PTHREAD_H)
 
 # We need the following in order to create <pthread.h> when the system

--- a/modules/pty
+++ b/modules/pty
@@ -14,6 +14,8 @@
 gl_PTY_H
 
 Makefile.am:
+nodist_include_HEADERS += pty.h
+
 BUILT_SOURCES += pty.h
 
 # We need the following in order to create <pty.h> when the system

--- a/modules/sched
+++ b/modules/sched
@@ -12,6 +12,9 @@
 gl_SCHED_H
 
 Makefile.am:
+nodist_include_HEADERS += $(SCHED_H)
+EXTRA_HEADERS += sched.h
+
 BUILT_SOURCES += $(SCHED_H)
 
 # We need the following in order to create a replacement for <sched.h> when

--- a/modules/search
+++ b/modules/search
@@ -15,6 +15,8 @@
 gl_SEARCH_H
 
 Makefile.am:
+nodist_include_HEADERS += search.h
+
 BUILT_SOURCES += search.h
 
 # We need the following in order to create <search.h> when the system

--- a/modules/selinux-h
+++ b/modules/selinux-h
@@ -18,6 +18,8 @@
 AC_REQUIRE([AC_C_INLINE])
 
 Makefile.am:
+nobase_nodist_include_HEADERS += selinux/selinux.h
+
 lib_SOURCES += se-context.in.h se-selinux.in.h
 
 BUILT_SOURCES += selinux/selinux.h

--- a/modules/signal
+++ b/modules/signal
@@ -15,6 +15,8 @@
 gl_SIGNAL_H
 
 Makefile.am:
+nodist_include_HEADERS += signal.h
+
 BUILT_SOURCES += signal.h
 
 # We need the following in order to create <signal.h> when the system

--- a/modules/spawn
+++ b/modules/spawn
@@ -16,6 +16,8 @@
 gl_SPAWN_H
 
 Makefile.am:
+nodist_include_HEADERS += spawn.h
+
 BUILT_SOURCES += spawn.h
 
 # We need the following in order to create a replacement for <spawn.h> when

--- a/modules/stdarg
+++ b/modules/stdarg
@@ -19,6 +19,9 @@
 gl_STDARG_H
 
 Makefile.am:
+nodist_include_HEADERS += $(STDARG_H)
+EXTRA_HEADERS += stdarg.h
+
 BUILT_SOURCES += $(STDARG_H)
 
 # We need the following in order to create <stdarg.h> when the system

--- a/modules/stdbool
+++ b/modules/stdbool
@@ -12,6 +12,9 @@
 AM_STDBOOL_H
 
 Makefile.am:
+nodist_include_HEADERS += $(STDBOOL_H)
+EXTRA_HEADERS += stdbool.h
+
 BUILT_SOURCES += $(STDBOOL_H)
 
 # We need the following in order to create <stdbool.h> when the system

--- a/modules/stddef
+++ b/modules/stddef
@@ -13,6 +13,9 @@
 gl_STDDEF_H
 
 Makefile.am:
+nodist_include_HEADERS += $(STDDEF_H)
+EXTRA_HEADERS += stddef.h
+
 BUILT_SOURCES += $(STDDEF_H)
 
 # We need the following in order to create <stddef.h> when the system

--- a/modules/stdint
+++ b/modules/stdint
@@ -20,6 +20,9 @@
 gl_STDINT_H
 
 Makefile.am:
+nodist_include_HEADERS += $(STDINT_H)
+EXTRA_HEADERS += stdint.h
+
 BUILT_SOURCES += $(STDINT_H)
 
 # We need the following in order to create <stdint.h> when the system

--- a/modules/stdio
+++ b/modules/stdio
@@ -19,6 +19,8 @@
 gl_STDIO_H
 
 Makefile.am:
+nodist_include_HEADERS += stdio.h
+
 BUILT_SOURCES += stdio.h
 
 # We need the following in order to create <stdio.h> when the system

--- a/modules/stdlib
+++ b/modules/stdlib
@@ -18,6 +18,8 @@
 gl_STDLIB_H
 
 Makefile.am:
+nodist_include_HEADERS += stdlib.h
+
 BUILT_SOURCES += stdlib.h
 
 # We need the following in order to create <stdlib.h> when the system

--- a/modules/string
+++ b/modules/string
@@ -17,6 +17,8 @@
 gl_HEADER_STRING_H
 
 Makefile.am:
+nodist_include_HEADERS += string.h
+
 BUILT_SOURCES += string.h
 
 # We need the following in order to create <string.h> when the system

--- a/modules/strings
+++ b/modules/strings
@@ -14,6 +14,8 @@
 gl_HEADER_STRINGS_H
 
 Makefile.am:
+nodist_include_HEADERS += strings.h
+
 BUILT_SOURCES += strings.h
 
 # We need the following in order to create <strings.h> when the system

--- a/modules/sys_file
+++ b/modules/sys_file
@@ -14,6 +14,8 @@
 AC_PROG_MKDIR_P
 
 Makefile.am:
+nobase_nodist_include_HEADERS += sys/file.h
+
 BUILT_SOURCES += sys/file.h
 
 # We need the following in order to create <sys/file.h> when the system

--- a/modules/sys_ioctl
+++ b/modules/sys_ioctl
@@ -16,6 +16,8 @@
 AC_PROG_MKDIR_P
 
 Makefile.am:
+nobase_nodist_include_HEADERS += sys/ioctl.h
+
 BUILT_SOURCES += sys/ioctl.h
 
 # We need the following in order to create <sys/ioctl.h> when the system

--- a/modules/sys_select
+++ b/modules/sys_select
@@ -17,6 +17,8 @@
 AC_PROG_MKDIR_P
 
 Makefile.am:
+nobase_nodist_include_HEADERS += sys/select.h
+
 BUILT_SOURCES += sys/select.h
 
 # We need the following in order to create <sys/select.h> when the system

--- a/modules/sys_socket
+++ b/modules/sys_socket
@@ -20,6 +20,8 @@
 AC_PROG_MKDIR_P
 
 Makefile.am:
+nobase_nodist_include_HEADERS += sys/socket.h
+
 BUILT_SOURCES += sys/socket.h
 
 # We need the following in order to create <sys/socket.h> when the system

--- a/modules/sys_stat
+++ b/modules/sys_stat
@@ -18,6 +18,8 @@
 AC_PROG_MKDIR_P
 
 Makefile.am:
+nobase_nodist_include_HEADERS += sys/stat.h
+
 BUILT_SOURCES += sys/stat.h
 
 # We need the following in order to create <sys/stat.h> when the system

--- a/modules/sys_time
+++ b/modules/sys_time
@@ -16,6 +16,8 @@
 AC_PROG_MKDIR_P
 
 Makefile.am:
+nobase_nodist_include_HEADERS += sys/time.h
+
 BUILT_SOURCES += sys/time.h
 
 # We need the following in order to create <sys/time.h> when the system

--- a/modules/sys_times
+++ b/modules/sys_times
@@ -15,6 +15,8 @@
 AC_PROG_MKDIR_P
 
 Makefile.am:
+nobase_nodist_include_HEADERS += sys/times.h
+
 BUILT_SOURCES += sys/times.h
 
 # We need the following in order to create <sys/times.h> when the system

--- a/modules/sys_utsname
+++ b/modules/sys_utsname
@@ -15,6 +15,8 @@
 AC_PROG_MKDIR_P
 
 Makefile.am:
+nobase_nodist_include_HEADERS += sys/utsname.h
+
 BUILT_SOURCES += sys/utsname.h
 
 # We need the following in order to create <sys/utsname.h> when the system

--- a/modules/sys_wait
+++ b/modules/sys_wait
@@ -15,6 +15,8 @@
 AC_PROG_MKDIR_P
 
 Makefile.am:
+nobase_nodist_include_HEADERS += sys/wait.h
+
 BUILT_SOURCES += sys/wait.h
 
 # We need the following in order to create <sys/wait.h> when the system

--- a/modules/sysexits
+++ b/modules/sysexits
@@ -12,6 +12,9 @@
 gl_SYSEXITS
 
 Makefile.am:
+nodist_include_HEADERS += $(SYSEXITS_H)
+EXTRA_HEADERS += sysexits.h
+
 BUILT_SOURCES += $(SYSEXITS_H)
 
 # We need the following in order to create <sysexits.h> when the system

--- a/modules/termios
+++ b/modules/termios
@@ -14,6 +14,8 @@
 gl_TERMIOS_H
 
 Makefile.am:
+nodist_include_HEADERS += termios.h
+
 BUILT_SOURCES += termios.h
 
 # We need the following in order to create <termios.h> when the system

--- a/modules/time
+++ b/modules/time
@@ -17,6 +17,8 @@
 gl_HEADER_TIME_H
 
 Makefile.am:
+nodist_include_HEADERS += time.h
+
 BUILT_SOURCES += time.h
 
 # We need the following in order to create <time.h> when the system

--- a/modules/unistd
+++ b/modules/unistd
@@ -16,6 +16,8 @@
 gl_UNISTD_H
 
 Makefile.am:
+nodist_include_HEADERS += unistd.h
+
 BUILT_SOURCES += unistd.h
 
 # We need the following in order to create an empty placeholder for

--- a/modules/unitypes
+++ b/modules/unitypes
@@ -12,6 +12,9 @@
 gl_LIBUNISTRING_LIBHEADER([0.9], [unitypes.h])
 
 Makefile.am:
+nodist_include_HEADERS += $(LIBUNISTRING_UNITYPES_H)
+EXTRA_HEADERS += unitypes.h
+
 BUILT_SOURCES += $(LIBUNISTRING_UNITYPES_H)
 
 unitypes.h: unitypes.in.h

--- a/modules/unused-parameter
+++ b/modules/unused-parameter
@@ -12,6 +12,8 @@
 configure.ac:
 
 Makefile.am:
+nodist_include_HEADERS += unused-parameter.h
+
 # The BUILT_SOURCES created by this Makefile snippet are not used via #include
 # statements but through direct file reference. Therefore this snippet must be
 # present in all Makefile.am that need it. This is ensured by the applicability

--- a/modules/warn-on-use
+++ b/modules/warn-on-use
@@ -13,6 +13,8 @@
 configure.ac:
 
 Makefile.am:
+nodist_include_HEADERS += warn-on-use.h
+
 BUILT_SOURCES += warn-on-use.h
 # The warn-on-use.h that gets inserted into generated .h files is the same as
 # build-aux/warn-on-use.h, except that it has the copyright header cut off.

--- a/modules/wchar
+++ b/modules/wchar
@@ -17,6 +17,8 @@
 gl_WCHAR_H
 
 Makefile.am:
+nodist_include_HEADERS += wchar.h
+
 BUILT_SOURCES += wchar.h
 
 # We need the following in order to create <wchar.h> when the system

--- a/modules/wctype
+++ b/modules/wctype
@@ -15,6 +15,8 @@
 gl_WCTYPE_H
 
 Makefile.am:
+nodist_include_HEADERS += wctype.h
+
 BUILT_SOURCES += wctype.h
 
 # We need the following in order to create <wctype.h> when the system