package/pinentry: add pinentry-fltk

pinentry-fltk has been added in version 1.1.0 with
https://github.com/gpg/pinentry/commit/6c45eed62214b44fcc11e642b19df7b6ca0da0bd

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/pinentry/Config.in

@@ -15,6 +15,19 @@ menuconfig BR2_PACKAGE_PINENTRY
 
 if BR2_PACKAGE_PINENTRY
 
+config BR2_PACKAGE_PINENTRY_FLTK
+	bool "pinentry-fltk"
+	depends on BR2_USE_MMU # fltk
+	depends on BR2_INSTALL_LIBSTDCPP # fltk
+	depends on BR2_PACKAGE_XORG7 # fltk
+	select BR2_PACKAGE_FLTK
+	help
+	  The pinentry-fltk tool
+
+comment "pinentry-fltk needs X and a toolchain w/ C++"
+	depends on BR2_USE_MMU
+	depends on !BR2_PACKAGE_XORG7 || !BR2_INSTALL_LIBSTDCPP
+
 config BR2_PACKAGE_PINENTRY_NCURSES
 	bool "pinentry-ncurses"
 	select BR2_PACKAGE_NCURSES

package/pinentry/pinentry.mk

@@ -36,6 +36,15 @@ else
 PINENTRY_CONF_OPTS += --disable-libsecret
 endif
 
+# pinentry-fltk backend
+ifeq ($(BR2_PACKAGE_PINENTRY_FLTK),y)
+PINENTRY_CONF_ENV += ac_cv_path_FLTK_CONFIG=$(STAGING_DIR)/usr/bin/fltk-config
+PINENTRY_CONF_OPTS += --enable-pinentry-fltk
+PINENTRY_DEPENDENCIES += fltk
+else
+PINENTRY_CONF_OPTS += --disable-pinentry-fltk
+endif
+
 # pinentry-ncurses backend
 ifeq ($(BR2_PACKAGE_PINENTRY_NCURSES),y)
 PINENTRY_CONF_OPTS += --enable-ncurses --with-ncurses-include-dir=none