--- src/3rdparty/libmng/aclocal.m4
+++ src/3rdparty/libmng/aclocal.m4
@@ -1607,7 +1607,7 @@
     # If the export-symbols file already is a .def file (1st line
     # is EXPORTS), use it as is.
     # If DATA tags from a recent dlltool are present, honour them!
-    archive_expsym_cmds='if test "x`head -1 $export_symbols`" = xEXPORTS; then
+    archive_expsym_cmds='if test "x`head -n 1 $export_symbols`" = xEXPORTS; then
 	cp $export_symbols $output_objdir/$soname-def;
       else
 	echo EXPORTS > $output_objdir/$soname-def;
@@ -3546,7 +3546,7 @@
   lt_cv_file_magic_cmd='/usr/bin/file -L'
   case "$host_os" in
   rhapsody* | darwin1.[[012]])
-    lt_cv_file_magic_test_file=`echo /System/Library/Frameworks/System.framework/Versions/*/System | head -1`
+    lt_cv_file_magic_test_file=`echo /System/Library/Frameworks/System.framework/Versions/*/System | head -n 1`
     ;;
   *) # Darwin 1.3 on
     lt_cv_file_magic_test_file='/usr/lib/libSystem.dylib'
--- src/3rdparty/libmng/config.guess
+++ src/3rdparty/libmng/config.guess
@@ -319,7 +319,7 @@
 	echo m68k-sun-sunos${UNAME_RELEASE}
 	exit 0 ;;
     sun*:*:4.2BSD:*)
-	UNAME_RELEASE=`(head -1 /etc/motd | awk '{print substr($5,1,3)}') 2>/dev/null`
+	UNAME_RELEASE=`(head -n 1 /etc/motd | awk '{print substr($5,1,3)}') 2>/dev/null`
 	test "x${UNAME_RELEASE}" = "x" && UNAME_RELEASE=3
 	case "`/bin/arch`" in
 	    sun3)
@@ -506,7 +506,7 @@
 	fi
 	exit 0 ;;
     *:AIX:*:[45])
-	IBM_CPU_ID=`/usr/sbin/lsdev -C -c processor -S available | head -1 | awk '{ print $1 }'`
+	IBM_CPU_ID=`/usr/sbin/lsdev -C -c processor -S available | head -n 1 | awk '{ print $1 }'`
 	if /usr/sbin/lsattr -El ${IBM_CPU_ID} | grep ' POWER' >/dev/null 2>&1; then
 		IBM_ARCH=rs6000
 	else
--- src/3rdparty/libmng/configure
+++ src/3rdparty/libmng/configure
@@ -1956,7 +1956,7 @@
   lt_cv_file_magic_cmd='/usr/bin/file -L'
   case "$host_os" in
   rhapsody* | darwin1.[012])
-    lt_cv_file_magic_test_file=`echo /System/Library/Frameworks/System.framework/Versions/*/System | head -1`
+    lt_cv_file_magic_test_file=`echo /System/Library/Frameworks/System.framework/Versions/*/System | head -n 1`
     ;;
   *) # Darwin 1.3 on
     lt_cv_file_magic_test_file='/usr/lib/libSystem.dylib'
@@ -3433,7 +3433,7 @@
     # If the export-symbols file already is a .def file (1st line
     # is EXPORTS), use it as is.
     # If DATA tags from a recent dlltool are present, honour them!
-    archive_expsym_cmds='if test "x`head -1 $export_symbols`" = xEXPORTS; then
+    archive_expsym_cmds='if test "x`head -n 1 $export_symbols`" = xEXPORTS; then
 	cp $export_symbols $output_objdir/$soname-def;
       else
 	echo EXPORTS > $output_objdir/$soname-def;