sys-apps/texinfo: Apply Flatcar modifications

sdk_container/src/third_party/coreos-overlay/sys-apps/texinfo/README.md

@@ -0,0 +1,5 @@
+We keep this package in overlay, because we need CCACHE_DIR for tool
+build, so we need to modify the configure.ac script and run autoreconf
+again. We also skip building doc, man and js for main build.
+
+There wasn't too much information about the reasons for the changes.

sdk_container/src/third_party/coreos-overlay/sys-apps/texinfo/files/flatcar-modifications.patch

@@ -0,0 +1,26 @@
+diff -ur texinfo-6.8/Makefile.am texinfo-6.8-patched/Makefile.am
+--- texinfo-6.8/Makefile.am	2021-02-16 21:07:41.000000000 +0000
++++ texinfo-6.8-patched/Makefile.am	2021-09-21 11:05:15.495497278 +0000
+@@ -62,9 +62,7 @@
+   SUBDIRS += info
+ endif
+ endif
+-  SUBDIRS += install-info po po_document tp Pod-Simple-Texinfo texindex util \
+-             doc man
+-  SUBDIRS += js
++  SUBDIRS += install-info po po_document tp Pod-Simple-Texinfo texindex util
+ endif
+ 
+ distclean-local:
+diff -ur texinfo-6.8/configure.ac texinfo-6.8-patched/configure.ac
+--- texinfo-6.8/configure.ac	2021-07-03 09:12:42.000000000 +0000
++++ texinfo-6.8-patched/configure.ac	2021-09-21 11:03:11.238623956 +0000
+@@ -192,7 +192,7 @@
+   # env -i gives this build host configure a clean environment;
+   # consequently, we have to re-initialize $PATH.
+   env -i CC="$BUILD_CC" AR="$BUILD_AR" RANLIB="$BUILD_RANLIB" \
+-      PATH="$PATH" \
++      PATH="$PATH" CCACHE_DIR="$CCACHE_DIR" \
+       tools_only=1 \
+     ${confdir}/configure --build=${build} --host=${build} \
+                          --disable-rpath --disable-nls

sdk_container/src/third_party/coreos-overlay/sys-apps/texinfo/texinfo-6.8.ebuild

@@ -7,7 +7,7 @@
 
 EAPI=7
 
-inherit flag-o-matic toolchain-funcs
+inherit autotools flag-o-matic toolchain-funcs
 
 DESCRIPTION="The GNU info program and utilities"
 HOMEPAGE="https://www.gnu.org/software/texinfo/"
@@ -34,6 +34,7 @@ BDEPEND="nls? ( >=sys-devel/gettext-0.19.6 )"
 
 PATCHES=(
 	"${FILESDIR}/${P}-undo-gnulib-nonnul.patch"
+	"${FILESDIR}/flatcar-modifications.patch"
 )
 
 src_prepare() {
@@ -43,6 +44,8 @@ src_prepare() {
 		sed -i -e '1c\#!/usr/bin/env sh' util/texi2dvi util/texi2pdf || die
 		touch doc/{texi2dvi,texi2pdf,pdftexi2dvi}.1
 	fi
+
+	eautoreconf
 }
 
 src_configure() {