Fix udftools in static linking scenarios

index 708fef9ab7..2d3477a51c 100644
@@ -8,5 +8,6 @@ UDFTOOLS_VERSION = 2.0
 UDFTOOLS_SITE = https://github.com/pali/udftools/releases/download/$(UDFTOOLS_VERSION)
 UDFTOOLS_LICENSE = GPL-2.0+
 UDFTOOLS_LICENSE_FILES = COPYING
+UDFTOOLS_DEPENDENCIES = readline
 
 $(eval $(autotools-package))

new file mode 100644
index 0000000000..22b479cd91
@@ -0,0 +1,62 @@
+From 7bbf2046fbcf4416ec226ecb3a2b4c6a5c263298 Mon Sep 17 00:00:00 2001
+From: Thomas Petazzoni <[email protected]>
+Date: Sun, 22 Apr 2018 23:06:28 +0200
+Subject: [PATCH] configure.ac, readline.pc.in: fix Requires.private value
+
+The provided readline.pc.in hardcodes the fact that readline depends
+on the tinfo library. However, different termcap implementation are
+supported beyond tinfo. This commit improves the configure.ac script
+to define a TERMCAP_PKG_CONFIG_LIB variable, which is then used in
+readline.pc.in.
+
+This for example allows the generated readline.pc to properly contain
+"Requires.private: ncurses" when ncurses is used as the termcap
+implementation.
+
+Signed-off-by: Thomas Petazzoni <[email protected]>
+---
+ configure.ac   | 8 ++++++++
+ readline.pc.in | 2 +-
+ 2 files changed, 9 insertions(+), 1 deletion(-)
+
+diff --git a/configure.ac b/configure.ac
+index fd0cec4..9f85f37 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -276,6 +276,13 @@ case "$BUILD_DIR" in
+ *)	;;
+ esac
+ 
++case "$TERMCAP_LIB" in
++-ltinfo)  TERMCAP_PKG_CONFIG_LIB=tinfo ;;
++-lcurses) TERMCAP_PKG_CONFIG_LIB=ncurses ;;
++-lncurses) TERMCAP_PKG_CONFIG_LIB=ncurses ;;
++-ltermcap) TERMCAP_PKG_CONFIG_LIB=termcap ;;
++esac
++
+ AC_SUBST(BUILD_DIR)
+ 
+ AC_SUBST(CFLAGS)
+@@ -292,6 +299,7 @@ AC_SUBST(host_os)
+ AC_SUBST(LIBVERSION)
+ 
+ AC_SUBST(TERMCAP_LIB)
++AC_SUBST(TERMCAP_PKG_CONFIG_LIB)
+ 
+ AC_OUTPUT([Makefile doc/Makefile examples/Makefile shlib/Makefile readline.pc],
+ [
+diff --git a/readline.pc.in b/readline.pc.in
+index fbfca8a..a7f2cf3 100644
+--- a/readline.pc.in
++++ b/readline.pc.in
+@@ -7,6 +7,6 @@ Name: Readline
+ Description: Gnu Readline library for command line editing
+ URL: http://tiswww.cwru.edu/php/chet/readline/rltop.html
+ Version: @LIBVERSION@
+-Requires.private: tinfo
++Requires.private: @TERMCAP_PKG_CONFIG_LIB@
+ Libs: -L${libdir} -lreadline
+ Cflags: -I${includedir}/readline
+-- 
+2.14.3
+

index cc5d4f2920..e00c594697 100644
@@ -7,18 +7,31 @@
 READLINE_VERSION = 7.0
 READLINE_SITE = $(BR2_GNU_MIRROR)/readline
 READLINE_INSTALL_STAGING = YES
-READLINE_DEPENDENCIES = ncurses
-HOST_READLINE_DEPENDENCIES = host-ncurses
+READLINE_DEPENDENCIES = ncurses host-autoconf
+HOST_READLINE_DEPENDENCIES = host-ncurses host-autoconf
 READLINE_CONF_ENV = bash_cv_func_sigsetjmp=yes \
 	bash_cv_wcwidth_broken=no
 READLINE_LICENSE = GPL-3.0+
 READLINE_LICENSE_FILES = COPYING
 
+# readline only uses autoconf, not automake, and therefore the regular
+# AUTORECONF = YES doesn't work.
+define READLINE_AUTOCONF
+	cd $(@D); $(HOST_DIR)/bin/autoconf
+endef
+READLINE_PRE_CONFIGURE_HOOKS += READLINE_AUTOCONF
+HOST_READLINE_PRE_CONFIGURE_HOOKS += READLINE_AUTOCONF
+
 define READLINE_PURGE_EXAMPLES
 	rm -rf $(TARGET_DIR)/usr/share/readline
 endef
 READLINE_POST_INSTALL_TARGET_HOOKS += READLINE_PURGE_EXAMPLES
 
+define READLINE_INSTALL_PC_FILE
+	$(INSTALL) -D -m 644 $(@D)/readline.pc $(STAGING_DIR)/usr/lib/pkgconfig/readline.pc
+endef
+READLINE_POST_INSTALL_STAGING_HOOKS += READLINE_INSTALL_PC_FILE
+
 define READLINE_INSTALL_INPUTRC
 	$(INSTALL) -D -m 644 package/readline/inputrc $(TARGET_DIR)/etc/inputrc
 endef

new file mode 100644
index 0000000000..f73db99ca2
@@ -0,0 +1,60 @@
+From bdacf0101fea1dad2c89996b27cb4b9caee9109c Mon Sep 17 00:00:00 2001
+From: Thomas Petazzoni <[email protected]>
+Date: Sun, 22 Apr 2018 22:28:09 +0200
+Subject: [PATCH] configure.ac: detect readline via pkg-config when possible
+
+pkg-config automatically handles static linking situations, where for
+example readline is linked against ncurses, and therefore -lncurses
+needs to be passed in addition to -lreadline.
+
+This proposal uses pkg-config when available. If pkg-config is not
+found, or readline is not found via pkg-config, we fallback to the
+existing AC_CHECK_LIB(). This AC_CHECK_LIB() test is modified to set
+READLINE_LIBS, like PKG_CHECK_MODULES() does. The Makefile.am
+consequently uses READLINE_LIBS instead of hardcoding -lreadline.
+
+Signed-off-by: Thomas Petazzoni <[email protected]>
+---
+ configure.ac      | 14 ++++++++++++--
+ wrudf/Makefile.am |  2 +-
+ 2 files changed, 13 insertions(+), 3 deletions(-)
+
+diff --git a/configure.ac b/configure.ac
+index 95fbba3..62b1caa 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -9,8 +9,18 @@ AC_PROG_CC
+ AC_DISABLE_SHARED
+ AM_PROG_LIBTOOL
+ 
+-dnl Checks for libraries.
+-AC_CHECK_LIB(readline, readline, [ ], AC_MSG_ERROR([cannot find -lreadline.]))
++PKG_PROG_PKG_CONFIG
++
++dnl Checks for libraries, by using pkg-config when available
++if test -n "${PKG_CONFIG}" ; then
++  PKG_CHECK_MODULES([READLINE], [readline], [readline_found=yes], [readline_found=no])
++fi
++
++if test "${readline_found}" != "yes" ; then
++  AC_CHECK_LIB(readline, readline,
++               [AC_SUBST([READLINE_LIBS], [-lreadline])],
++               AC_MSG_ERROR([cannot find -lreadline.]))
++fi
+ 
+ dnl Checks for header files.
+ AC_HEADER_STDC
+diff --git a/wrudf/Makefile.am b/wrudf/Makefile.am
+index fe1c269..e3ab85b 100644
+--- a/wrudf/Makefile.am
++++ b/wrudf/Makefile.am
+@@ -1,5 +1,5 @@
+ bin_PROGRAMS = wrudf
+-wrudf_LDADD = $(top_builddir)/libudffs/libudffs.la -lreadline
++wrudf_LDADD = $(top_builddir)/libudffs/libudffs.la $(READLINE_LIBS)
+ wrudf_SOURCES = wrudf.c wrudf-cmnd.c wrudf-desc.c wrudf-cdrw.c wrudf-cdr.c ide-pc.c wrudf.h ide-pc.h ../include/ecma_167.h ../include/osta_udf.h ../include/bswap.h
+ 
+ AM_CPPFLAGS = -I$(top_srcdir)/include -D_GNU_SOURCE -DDEBUG
+-- 
+2.14.3
+

index 2d3477a51c..e5bf59137e 100644
@@ -8,6 +8,7 @@ UDFTOOLS_VERSION = 2.0
 UDFTOOLS_SITE = https://github.com/pali/udftools/releases/download/$(UDFTOOLS_VERSION)
 UDFTOOLS_LICENSE = GPL-2.0+
 UDFTOOLS_LICENSE_FILES = COPYING
-UDFTOOLS_DEPENDENCIES = readline
+UDFTOOLS_AUTORECONF = YES
+UDFTOOLS_DEPENDENCIES = readline host-pkgconf
 
 $(eval $(autotools-package))