diff --git a/Makefile b/Makefile
index efb6d46..ea9dd3d 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 VERSION = 1
 PATCHLEVEL = 24
-SUBLEVEL = 0
+SUBLEVEL = 1
 EXTRAVERSION =
 NAME = Unnamed
 
diff --git a/coreutils/sort.c b/coreutils/sort.c
index 36f0254..c2e8bb8 100644
--- a/coreutils/sort.c
+++ b/coreutils/sort.c
@@ -106,7 +106,9 @@
 
 static char *get_key(char *str, struct sort_key *key, int flags)
 {
-	int start = 0, end = 0, len, j;
+	int start = start; /* for compiler */
+	int end;
+	int len, j;
 	unsigned i;
 
 	/* Special case whole string, so we don't have to make a copy */
@@ -123,12 +125,15 @@
 			end = len;
 		/* Loop through fields */
 		else {
+			unsigned char ch = 0;
+
 			end = 0;
 			for (i = 1; i < key->range[2*j] + j; i++) {
 				if (key_separator) {
 					/* Skip body of key and separator */
-					while (str[end]) {
-						if (str[end++] == key_separator)
+					while ((ch = str[end]) != '\0') {
+							end++;
+						if (ch == key_separator)
 							break;
 					}
 				} else {
@@ -136,7 +141,7 @@
 					while (isspace(str[end]))
 						end++;
 					/* Skip body of key */
-					while (str[end]) {
+					while (str[end] != '\0') {
 						if (isspace(str[end]))
 							break;
 						end++;
@@ -144,8 +149,13 @@
 				}
 			}
 			/* Remove last delim: "abc:def:" => "abc:def" */
-			if (key_separator && j && end != 0)
+			if (j && ch) {
+				//if (str[end-1] != key_separator)
+				//  bb_error_msg(_and_die("BUG! "
+				//  "str[start:%d,end:%d]:'%.*s'",
+				//  start, end, (int)(end-start), &str[start]);
 				end--;
+			}
 		}
 		if (!j) start = end;
 	}
diff --git a/networking/ftpd.c b/networking/ftpd.c
index 7735b72..8345ae6 100644
--- a/networking/ftpd.c
+++ b/networking/ftpd.c
@@ -1223,11 +1223,26 @@
 #endif
 	argv += optind;
 	if (argv[0]) {
+		const char *basedir = argv[0];
 #if !BB_MMU
 		G.root_fd = xopen("/", O_RDONLY | O_DIRECTORY);
 		close_on_exec_on(G.root_fd);
 #endif
-		xchroot(argv[0]);
+		if (chroot(basedir) == 0)
+			basedir = "/";
+#if !BB_MMU
+		else {
+			close(G.root_fd);
+			G.root_fd = -1;
+		}
+#endif
+		/*
+		 * If chroot failed, assume that we aren't root,
+		 * and at least chdir to the specified DIR
+		 * (older versions were dying with error message).
+		 * If chroot worked, move current dir to new "/":
+		 */
+		xchdir(basedir);
 	}
 
 #if ENABLE_FEATURE_FTP_AUTHENTICATION
diff --git a/networking/httpd.c b/networking/httpd.c
index 00169c3..ed15fd8 100644
--- a/networking/httpd.c
+++ b/networking/httpd.c
@@ -967,19 +967,30 @@
 	}
 #endif
 	if (responseNum == HTTP_MOVED_TEMPORARILY) {
-		len += sprintf(iobuf + len, "Location: %s/%s%s\r\n",
+		/* Responding to "GET /dir" with
+		 * "HTTP/1.0 302 Found" "Location: /dir/"
+		 * - IOW, asking them to repeat with a slash.
+		 * Here, overflow IS possible, can't use sprintf:
+		 * mkdir test
+		 * python -c 'print("get /test?" + ("x" * 8192))' | busybox httpd -i -h .
+		 */
+		len += snprintf(iobuf + len, IOBUF_SIZE-3 - len,
+				"Location: %s/%s%s\r\n",
 				found_moved_temporarily,
 				(g_query ? "?" : ""),
 				(g_query ? g_query : ""));
+		if (len > IOBUF_SIZE-3)
+			len = IOBUF_SIZE-3;
 	}
 
 #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
 	if (error_page && access(error_page, R_OK) == 0) {
-		strcat(iobuf, "\r\n");
-		len += 2;
-
-		if (DEBUG)
+		iobuf[len++] = '\r';
+		iobuf[len++] = '\n';
+		if (DEBUG) {
+			iobuf[len] = '\0';
 			fprintf(stderr, "headers: '%s'\n", iobuf);
+		}
 		full_write(STDOUT_FILENO, iobuf, len);
 		if (DEBUG)
 			fprintf(stderr, "writing error page: '%s'\n", error_page);
@@ -1021,8 +1032,10 @@
 				responseNum, responseString,
 				responseNum, responseString, infoString);
 	}
-	if (DEBUG)
+	if (DEBUG) {
+		iobuf[len] = '\0';
 		fprintf(stderr, "headers: '%s'\n", iobuf);
+	}
 	if (full_write(STDOUT_FILENO, iobuf, len) != len) {
 		if (verbose > 1)
 			bb_perror_msg("error");
diff --git a/scripts/trylink b/scripts/trylink
index 48c487b..357aa62 100755
--- a/scripts/trylink
+++ b/scripts/trylink
@@ -47,18 +47,22 @@
 
 check_cc() {
     local tempname="$(mktemp)"
+    local r
+    echo "int main(int argc,char**argv){return argv?argc:0;}" >"$tempname".c
     # Can use "-o /dev/null", but older gcc tend to *unlink it* on failure! :(
-    # "-xc": C language. "/dev/null" is an empty source file.
-    if $CC $CPPFLAGS $CFLAGS $1 -shared -xc /dev/null -o "$tempname".o >/dev/null 2>&1; then
-	echo "$1";
-    else
-	echo "$2";
-    fi
-    rm -f "$tempname" "$tempname".o
+    # Was using "-xc /dev/null", but we need a valid C program.
+    # "eval" may be needed if CFLAGS can contain
+    # '... -D"BB_VER=KBUILD_STR(1.N.M)" ...'
+    # and we need shell to process quotes!
+    $CC $CFLAGS $1 "$tempname".c -o "$tempname" >/dev/null 2>&1
+    r=$?
+    rm -f "$tempname" "$tempname".c "$tempname".o
+    return $r
 }
 
 check_libc_is_glibc() {
     local tempname="$(mktemp)"
+    local r
     echo "\
 	#include <stdlib.h>
 	/* Apparently uclibc defines __GLIBC__ (compat trick?). Oh well. */
@@ -66,12 +70,10 @@
 	syntax error here
 	#endif
 	" >"$tempname".c
-    if $CC $CPPFLAGS $CFLAGS "$tempname".c -c -o "$tempname".o >/dev/null 2>&1; then
-	echo "$2";
-    else
-	echo "$1";
-    fi
-    rm -f "$tempname" "$tempname".[co]
+    ! $CC $CFLAGS "$tempname".c -c -o "$tempname".o >/dev/null 2>&1
+    r=$?
+    rm -f "$tempname" "$tempname".c "$tempname".o
+    return $r
 }
 
 EXE="$1"
@@ -83,32 +85,41 @@
 LDLIBS="$7"
 
 # The --sort-section option is not supported by older versions of ld
-SORT_SECTION=`check_cc "-Wl,--sort-section,alignment" ""`
+SORT_SECTION="-Wl,--sort-section,alignment"
+if ! check_cc "-Wl,--sort-section,alignment"; then
+    echo "Your linker does not support --sort-section,alignment"
+    SORT_SECTION=""
+fi
 
 START_GROUP="-Wl,--start-group"
 END_GROUP="-Wl,--end-group"
 INFO_OPTS="-Wl,--warn-common -Wl,-Map,$EXE.map -Wl,--verbose"
 
 # gold may not support --sort-common (yet)
-SORT_COMMON=`check_cc "-Wl,--sort-common" ""`
+SORT_COMMON="-Wl,--sort-common"
+if ! check_cc "-Wl,--sort-common"; then
+    echo "Your linker does not support --sort-common"
+    SORT_COMMON=""
+fi
 
 # Static linking against glibc produces buggy executables
 # (glibc does not cope well with ld --gc-sections).
 # See sources.redhat.com/bugzilla/show_bug.cgi?id=3400
 # Note that glibc is unsuitable for static linking anyway.
 # We are removing -Wl,--gc-sections from link command line.
-GC_SECTIONS=`(
-. ./.config
-if test x"$CONFIG_STATIC" = x"y"; then
-    check_libc_is_glibc "" "-Wl,--gc-sections"
-else
-    echo "-Wl,--gc-sections"
+GC_SECTIONS="-Wl,--gc-sections"
+if (. ./.config && test x"$CONFIG_STATIC" = x"y") then
+    if check_libc_is_glibc; then
+	echo "Static linking against glibc, can't use --gc-sections"
+#	GC_SECTIONS=""
+    fi
 fi
-)`
-
 # The --gc-sections option is not supported by older versions of ld
 if test -n "$GC_SECTIONS"; then
-    GC_SECTIONS=`check_cc "$GC_SECTIONS" ""`
+    if ! check_cc "$GC_SECTIONS"; then
+	echo "Your linker does not support $GC_SECTIONS"
+	GC_SECTIONS=""
+    fi
 fi
 
 # Sanitize lib list (dups, extra spaces etc)
diff --git a/testsuite/sort.tests b/testsuite/sort.tests
index c4b2234..39c7af7 100755
--- a/testsuite/sort.tests
+++ b/testsuite/sort.tests
@@ -106,6 +106,42 @@
 a:b
 " ""
 
+testing "glibc build sort" "sort -t. -k 1,1 -k 2n,2n -k 3 input" "\
+GLIBC_2.1
+GLIBC_2.1.1
+GLIBC_2.2
+GLIBC_2.2.1
+GLIBC_2.10
+GLIBC_2.20
+GLIBC_2.21
+" "\
+GLIBC_2.21
+GLIBC_2.1.1
+GLIBC_2.2.1
+GLIBC_2.2
+GLIBC_2.20
+GLIBC_2.10
+GLIBC_2.1
+" ""
+
+testing "glibc build sort unique" "sort -u -t. -k 1,1 -k 2n,2n -k 3 input" "\
+GLIBC_2.1
+GLIBC_2.1.1
+GLIBC_2.2
+GLIBC_2.2.1
+GLIBC_2.10
+GLIBC_2.20
+GLIBC_2.21
+" "\
+GLIBC_2.10
+GLIBC_2.2.1
+GLIBC_2.1.1
+GLIBC_2.20
+GLIBC_2.2
+GLIBC_2.1
+GLIBC_2.21
+" ""
+
 testing "sort -u should consider field only when discarding" "sort -u -k2 input" "\
 a c
 " "\