File openntpd-3.9p1_pie_configure.patch of Package openntpd

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File openntpd-3.9p1_pie_configure.patch of Package openntpd

Index: configure.ac
===================================================================
--- configure.ac.orig
+++ configure.ac
@@ -578,6 +578,35 @@ AC_ARG_ENABLE(strip,
 )
 AC_SUBST(STRIP_OPT)
 
+want_pie="no"
+AC_ARG_ENABLE(pie,
+	[  --enable-pie	 Compile with as PIE.],
+	[
+	AC_MSG_CHECKING([if we can use PIE])
+		if test "x$enableval" = "xyes" ; then
+			want_pie="yes"
+			# try to compile something with pie
+			old_cflags=$CFLAGS
+			# normally we need -Werror here
+			# but atm HAVE_DECL_ASPRINTF is defined twice
+			# and the check breaks with -Werror
+			CFLAGS="-pie -DPIC -fPIC -Werror"
+			AC_TRY_LINK([
+			],, [
+				LIBS="$LIBS -pie"
+				# enforce -fPIC so all objects are compiled with it
+				CFLAGS="$old_cflags -fPIC -DPIC"
+				want_pie=yes
+			], [
+				# restore old CFLAGS
+				CFLAGS="$old_cflags"
+				want_pie=no
+			])
+		fi
+	AC_MSG_RESULT($want_pie)
+	]
+)
+
 AC_ARG_WITH(builtin-arc4random,
 	[  --with-builtin-arc4random Use builtin arc4random rather than OpenSSL's],
 	[ builtin_arc4random=$withval ]

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File openntpd-3.9p1_pie_configure.patch of Package openntpd

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