From ba8d71f4478bff4d76bbc2f5fbda60ec1f7a7739 Mon Sep 17 00:00:00 2001
From: Mike Frysinger <vapier@gentoo.org>
Date: Tue, 21 Feb 2017 17:04:35 -0500
Subject: [PATCH] add support for gnulib

On a system with up-to-date GNU tools, this does not change
the size of nano's binary.

We start off with importing only a few modules, although we
don't yet delete the fallback logic for them.
---
 .gitignore      |  8 ++++++++
 Makefile.am     |  2 +-
 autogen.sh      | 26 ++++++++++++++++++++++++++
 configure.ac    |  7 +++++++
 m4/Makefile.am  |  1 +
 src/Makefile.am |  5 +++--
 6 files changed, 46 insertions(+), 3 deletions(-)

diff --git a/.gitignore b/.gitignore
index 89c53d02..40da99e5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,6 +16,7 @@ core
 /ABOUT-NLS
 /INSTALL
 /aclocal.m4
+/ar-lib
 /autom4te.cache
 /compile
 /config.cache
@@ -68,6 +69,13 @@ core
 /m4/wint_t.m4
 /m4/xsize.m4
 
+# gnulib entries
+/gnulib/
+/lib/
+/m4/.gitignore
+/m4/gnulib-cache.m4
+/snippet/
+
 /nano.spec
 /src/nano
 /src/revision.h
diff --git a/Makefile.am b/Makefile.am
index 48d587e5..1971a117 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,6 +1,6 @@
 AUTOMAKE_OPTIONS = gnu no-dependencies
 
-SUBDIRS = doc m4 po src
+SUBDIRS = doc lib m4 po src
 
 if USE_COLOR
 SUBDIRS += syntax
diff --git a/autogen.sh b/autogen.sh
index 54007223..cfe70582 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -1,4 +1,30 @@
 #!/bin/sh
 # Generate configure & friends for GIT users.
 
+gnulib_url="git://git.sv.gnu.org/gnulib.git"
+gnulib_hash="4084b3a1094372b960ce4a97634e08f4538c8bdd"
+
+modules="
+	strcase
+	strcasestr-simple
+	strnlen
+"
+
+# Make sure the local gnulib git repo is up-to-date.
+if [ ! -d "gnulib" ]; then
+	git clone --depth=123 ${gnulib_url}
+fi
+cd gnulib >/dev/null || exit 1
+curr_hash=$(git log -1 --format=%H)
+if [ "${gnulib_hash}" != "${curr_hash}" ]; then
+	git pull
+	git checkout -f ${gnulib_hash}
+fi
+cd .. >/dev/null || exit 1
+
+rm -rf lib
+./gnulib/gnulib-tool \
+	--import \
+	${modules}
+
 autoreconf -f -i -s
diff --git a/configure.ac b/configure.ac
index d9db2faf..9379450d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -26,10 +26,16 @@ dnl Make sure the ONCE macros are available.
 
 AC_PREREQ([2.69])
 
+dnl Lie about gnulib features we don't use to speed up & shrink down.
+
+gl_cv_func_printf_infinite_long_double=yes
+
 dnl Checks for programs.
 
 AC_GNU_SOURCE
 AC_PROG_CC
+gl_EARLY
+gl_INIT
 AC_PROG_LN_S
 AC_ISC_POSIX
 AC_SYS_LARGEFILE
@@ -747,6 +753,7 @@ AC_CONFIG_FILES([
 Makefile
 doc/Makefile
 doc/sample.nanorc
+lib/Makefile
 m4/Makefile
 po/Makefile.in
 src/Makefile
diff --git a/m4/Makefile.am b/m4/Makefile.am
index 1d565640..b9a37af7 100644
--- a/m4/Makefile.am
+++ b/m4/Makefile.am
@@ -8,6 +8,7 @@ EXTRA_DIST = \
 	glib-2.0.m4 \
 	glibc21.m4 \
 	glibc2.m4 \
+	gnulib-cache.m4 \
 	iconv.m4 \
 	intdiv0.m4 \
 	intldir.m4 \
diff --git a/src/Makefile.am b/src/Makefile.am
index 22baa16f..f3f0609b 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1,4 +1,5 @@
-AM_CPPFLAGS = -DLOCALEDIR=\"$(localedir)\" -DSYSCONFDIR=\"$(sysconfdir)\"
+AM_CPPFLAGS = -DLOCALEDIR=\"$(localedir)\" -DSYSCONFDIR=\"$(sysconfdir)\" \
+	-I$(top_builddir)/lib -I$(top_srcdir)/lib
 
 CLEANFILES = revision.h
 
@@ -37,7 +38,7 @@ nano_SOURCES =	browser.c \
 		utils.c \
 		winio.c 
 
-nano_LDADD = @GLIB_LIBS@ @LIBINTL@
+nano_LDADD = @GLIB_LIBS@ @LIBINTL@ $(top_builddir)/lib/libgnu.a
 
 install-exec-hook:
 	cd $(DESTDIR)$(bindir) && rm -f rnano && $(LN_S) nano rnano