From cbfe13d5f0de6e2a3deab2ba0dacda8c952476ab Mon Sep 17 00:00:00 2001
From: Robbie Harwood <[email protected]>
Date: Tue, 23 Aug 2016 16:45:26 -0400
Subject: [PATCH] [downstream] Adjust build configuration

Build binaries in this package as RELRO PIEs, libraries as partial RELRO,
and install shared libraries with the execute bit set on them.  Prune out
the -L/usr/lib* and PIE flags where they might leak out and affect
apps which just want to link with the libraries. FIXME: needs to check and
not just assume that the compiler supports using these flags.

Last-updated: krb5-1.15-beta1
---
 src/build-tools/krb5-config.in | 7 +++++++
 src/config/pre.in              | 2 +-
 src/config/shlib.conf          | 5 +++--
 3 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/src/build-tools/krb5-config.in b/src/build-tools/krb5-config.in
index c17cb5eb5..1891dea99 100755
--- a/src/build-tools/krb5-config.in
+++ b/src/build-tools/krb5-config.in
@@ -226,6 +226,13 @@ if test -n "$do_libs"; then
 	    -e 's#\$(PTHREAD_CFLAGS)#'"$PTHREAD_CFLAGS"'#' \
 	    -e 's#\$(CFLAGS)##'`
 
+    if test `dirname $libdir` = /usr ; then
+        lib_flags=`echo $lib_flags | sed -e "s#-L$libdir##" -e "s#$RPATH_FLAG$libdir##"`
+    fi
+    lib_flags=`echo $lib_flags | sed -e "s#-fPIE##g" -e "s#-pie##g"`
+    lib_flags=`echo $lib_flags | sed -e "s#-Wl,-z,relro##g"`
+    lib_flags=`echo $lib_flags | sed -e "s#-Wl,-z,now##g"`
+
     if test $library = 'kdb'; then
 	lib_flags="$lib_flags -lkdb5 $KDB5_DB_LIB"
 	library=krb5
diff --git a/src/config/pre.in b/src/config/pre.in
index 917357df9..a8540ae2a 100644
--- a/src/config/pre.in
+++ b/src/config/pre.in
@@ -185,7 +185,7 @@ INSTALL_PROGRAM=@INSTALL_PROGRAM@ $(INSTALL_STRIP)
 INSTALL_SCRIPT=@INSTALL_PROGRAM@
 INSTALL_DATA=@INSTALL_DATA@
 INSTALL_SHLIB=@INSTALL_SHLIB@
-INSTALL_SETUID=$(INSTALL) $(INSTALL_STRIP) -m 4755 -o root
+INSTALL_SETUID=$(INSTALL) $(INSTALL_STRIP) -m 4755
 ## This is needed because autoconf will sometimes define @exec_prefix@ to be
 ## ${prefix}.
 prefix=@prefix@
diff --git a/src/config/shlib.conf b/src/config/shlib.conf
index 3e4af6c02..2b20c3fda 100644
--- a/src/config/shlib.conf
+++ b/src/config/shlib.conf
@@ -423,7 +423,7 @@ mips-*-netbsd*)
 	# Linux ld doesn't default to stuffing the SONAME field...
 	# Use objdump -x to examine the fields of the library
 	# UNDEF_CHECK is suppressed by --enable-asan
-	LDCOMBINE='$(CC) -shared -fPIC -Wl,-h,$(LIBPREFIX)$(LIBBASE)$(SHLIBSEXT) $(UNDEF_CHECK)'
+	LDCOMBINE='$(CC) -shared -fPIC $(LDFLAGS) -Wl,-h,$(LIBPREFIX)$(LIBBASE)$(SHLIBSEXT) $(UNDEF_CHECK)  -Wl,-z,relro -Wl,--warn-shared-textrel'
 	UNDEF_CHECK='-Wl,--no-undefined'
 	# $(EXPORT_CHECK) runs export-check.pl when in maintainer mode.
 	LDCOMBINE_TAIL='-Wl,--version-script binutils.versions $(EXPORT_CHECK)'
@@ -435,7 +435,8 @@ mips-*-netbsd*)
 	SHLIB_EXPFLAGS='$(SHLIB_RPATH_FLAGS) $(SHLIB_DIRS) $(SHLIB_EXPLIBS)'
 	PROFFLAGS=-pg
 	PROG_RPATH_FLAGS='$(RPATH_FLAG)$(PROG_RPATH)'
-	CC_LINK_SHARED='$(CC) $(PROG_LIBPATH) $(PROG_RPATH_FLAGS) $(CFLAGS) $(LDFLAGS)'
+	CC_LINK_SHARED='$(CC) $(LDFLAGS) $(PROG_LIBPATH) $(PROG_RPATH_FLAGS) $(CFLAGS) -pie -Wl,-z,relro -Wl,-z,now'
+	INSTALL_SHLIB='${INSTALL} -m755'
 	CC_LINK_STATIC='$(CC) $(PROG_LIBPATH) $(CFLAGS) $(LDFLAGS)'
 	CXX_LINK_SHARED='$(CXX) $(PROG_LIBPATH) $(PROG_RPATH_FLAGS) $(CXXFLAGS) $(LDFLAGS)'
 	CXX_LINK_STATIC='$(CXX) $(PROG_LIBPATH) $(CXXFLAGS) $(LDFLAGS)'