package/ytree: fix musl build

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
[Thomas: improve the patch description, as suggested by Peter
Seiderer]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/ytree/0001-fix-musl.patch

@@ -0,0 +1,26 @@
+Fix musl build
+
+Fixes
+
+  match.c.text+0x9c): undefined reference to `re_comp'
+  match.c.text+0xca): undefined reference to `re_exec'
+
+by forcing to use the 'modern' regex methods implementation instead of
+the obsolete re_comp/re_exec ([1]) one?
+
+[1] http://man7.org/linux/man-pages/man3/re_comp.3.html
+
+Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
+
+diff -uNr ytree-1.99pl2.orig/match.c ytree-1.99pl2/match.c
+--- ytree-1.99pl2.orig/match.c	2019-09-29 12:37:57.000000000 +0200
++++ ytree-1.99pl2/match.c	2019-10-01 19:46:56.193815327 +0200
+@@ -10,7 +10,7 @@
+ #include "ytree.h"
+ 
+ #if defined( sun ) || defined( linux ) || defined( __NeXT__ ) || defined( OSF1 ) ||  defined( __OpenBSD__ ) || defined(__NetBSD__) || defined( __FreeBSD__ ) || defined( __GNU__ )
+-#define HAS_REGEX
++#define HAS_REGCOMP
+ #endif
+ 
+ #ifdef linux

package/ytree/Config.in

@@ -1,13 +1,8 @@
 config BR2_PACKAGE_YTREE
 	bool "ytree"
-	depends on !BR2_TOOLCHAIN_USES_MUSL # re_comp/re_exec
 	depends on BR2_USE_MMU # fork()
 	select BR2_PACKAGE_NCURSES
 	help
 	  Ytree - a (curses-based) file manager similar to DOS Xtree(tm)
 
 	  https://www.han.de/~werner/ytree.html
-
-comment "ytree needs a glibc or uClibc toolchain"
-	depends on BR2_USE_MMU
-	depends on BR2_TOOLCHAIN_USES_MUSL