package/util-linux: don't lie about availability of '%ms' scanf modifier

Use a patch from gentoo which allows building libmount even
if the C library does not supports %ms/%as.

See: https://bugs.gentoo.org/406303

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@33270 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/util-linux/Makefile

@@ -27,9 +27,6 @@ define Package/util-linux/Default
   URL:=http://www.kernel.org/pub/linux/utils/util-linux/
 endef
 
-CONFIGURE_VARS += \
-	scanf_cv_alloc_modifier="ms"
-
 CONFIGURE_ARGS += \
 	--enable-new-mount	\
 	--with-ncurses		\

package/util-linux/patches/001-no-printf-alloc.patch

@@ -0,0 +1,108 @@
+for systems that don't support latest POSIX standard: %as
+
+https://bugs.gentoo.org/406303
+
+--- a/configure.ac
++++ b/configure.ac
+@@ -688,7 +688,6 @@ AC_ARG_ENABLE([libmount],
+ UL_BUILD_INIT([libmount])
+ UL_REQUIRES_LINUX([libmount])
+ UL_REQUIRES_BUILD([libmount], [libblkid])
+-UL_REQUIRES_HAVE([libmount], [scanf_alloc_modifier], [scanf string alloc modifier])
+ AM_CONDITIONAL(BUILD_LIBMOUNT, test "x$build_libmount" = xyes)
+ 
+ AC_SUBST([LIBMOUNT_VERSION])
+--- a/libmount/src/tab_parse.c
++++ b/libmount/src/tab_parse.c
+@@ -22,6 +22,10 @@
+ #include "pathnames.h"
+ #include "strutils.h"
+ 
++#ifndef HAVE_SCANF_MS_MODIFIER
++# define UL_SCNsA "%s"
++#endif
++
+ static inline char *skip_spaces(char *s)
+ {
+ 	assert(s);
+@@ -61,16 +65,31 @@ static int mnt_parse_table_line(struct l
+ 	int rc, n = 0, xrc;
+ 	char *src = NULL, *fstype = NULL, *optstr = NULL;
+ 
++#ifndef HAVE_SCANF_MS_MODIFIER
++	size_t len = strlen(s) + 1;
++	src = malloc(len);
++	fstype = malloc(len);
++	fs->target = malloc(len);
++	optstr = malloc(len);
++#endif
++
+ 	rc = sscanf(s,	UL_SCNsA" "	/* (1) source */
+ 			UL_SCNsA" "	/* (2) target */
+ 			UL_SCNsA" "	/* (3) FS type */
+ 			UL_SCNsA" "	/* (4) options */
+ 			"%n",		/* byte count */
+ 
++#ifdef HAVE_SCANF_MS_MODIFIER
+ 			&src,
+ 			&fs->target,
+ 			&fstype,
+ 			&optstr,
++#else
++			src,
++			fs->target,
++			fstype,
++			optstr,
++#endif
+ 			&n);
+ 	xrc = rc;
+ 
+@@ -136,6 +155,16 @@ static int mnt_parse_mountinfo_line(stru
+ 	unsigned int maj, min;
+ 	char *fstype = NULL, *src = NULL, *p;
+ 
++#ifndef HAVE_SCANF_MS_MODIFIER
++	size_t len = strlen(s) + 1;
++	fs->root = malloc(len);
++	fs->target = malloc(len);
++	fs->vfs_optstr = malloc(len);
++	fs->fs_optstr = malloc(len);
++	fstype = malloc(len);
++	src = malloc(len);
++#endif
++
+ 	rc = sscanf(s,	"%u "		/* (1) id */
+ 			"%u "		/* (2) parent */
+ 			"%u:%u "	/* (3) maj:min */
+@@ -147,9 +176,15 @@ static int mnt_parse_mountinfo_line(stru
+ 			&fs->id,
+ 			&fs->parent,
+ 			&maj, &min,
++#ifdef HAVE_SCANF_MS_MODIFIER
+ 			&fs->root,
+ 			&fs->target,
+ 			&fs->vfs_optstr,
++#else
++			fs->root,
++			fs->target,
++			fs->vfs_optstr,
++#endif
+ 			&end);
+ 
+ 	if (rc >= 7 && end > 0)
+@@ -167,9 +202,15 @@ static int mnt_parse_mountinfo_line(stru
+ 			UL_SCNsA" "	/* (9) source */
+ 			UL_SCNsA,	/* (10) fs options (fs specific) */
+ 
++#ifdef HAVE_SCANF_MS_MODIFIER
+ 			&fstype,
+ 			&src,
+ 			&fs->fs_optstr);
++#else
++			fstype,
++			src,
++			fs->fs_optstr);
++#endif
+ 
+ 	if (rc >= 10) {
+ 		fs->flags |= MNT_FS_KERNEL;