[pkgsrc/trunk]: pkgsrc Optionally detect whether the compiler supports "-fsta...

[schmonz <schmonz%pkgsrc.org@localhost>]

details:   https://anonhg.NetBSD.org/pkgsrc/rev/78fb8d0c8220
branches:  trunk
changeset: 387001:78fb8d0c8220
user:      schmonz <schmonz%pkgsrc.org@localhost>
date:      Mon Nov 05 19:26:38 2018 +0000

description:
Optionally detect whether the compiler supports "-fstack-protector-strong".
If not, set _OPSYS_SUPPORTS_SSP=no during bootstrap and in mk.conf.

Do SSP detection on "SunOS", and let mk/platform/SunOS.mk's default
"yes" be overridden in mk.conf.

No change to generated mk.conf on NetBSD 8 or CentOS 6. Fixes bootstrap
on Tribblix.

diffstat:

 bootstrap/bootstrap  |  31 ++++++++++++++++++++++++++++++-
 mk/platform/SunOS.mk |   4 ++--
 2 files changed, 32 insertions(+), 3 deletions(-)

diffs (86 lines):

diff -r d2c0ac93d03d -r 78fb8d0c8220 bootstrap/bootstrap
--- a/bootstrap/bootstrap       Mon Nov 05 19:01:21 2018 +0000
+++ b/bootstrap/bootstrap       Mon Nov 05 19:26:38 2018 +0000
@@ -1,6 +1,6 @@
 #! /bin/sh
 
-# $NetBSD: bootstrap,v 1.256 2018/10/30 15:22:53 sevan Exp $
+# $NetBSD: bootstrap,v 1.257 2018/11/05 19:26:38 schmonz Exp $
 #
 # Copyright (c) 2001-2011 Alistair Crooks <agc%NetBSD.org@localhost>
 # All rights reserved.
@@ -841,6 +841,7 @@
        whoamiprog="${idprog} -un"
        machine_arch=`uname -p | sed -e 's/i86pc/i386/'`
        check_compiler=yes
+       check_ssp=yes
        ;;
 UnixWare)
        root_group=sys
@@ -991,6 +992,27 @@
        fi
 fi
 
+has_ssp_support() {
+       _compiler=cc
+       if [ "$compiler" != "" ]; then
+               _compiler="$compiler"
+       fi
+
+       mkdir_p_early ${wrkdir}/tmp
+       echo 'int main(void){return 0;}' > ${wrkdir}/tmp/ssp.c
+       ${_compiler} -fstack-protector-strong -o ${wrkdir}/tmp/ssp ${wrkdir}/tmp/ssp.c >/dev/null 2>&1
+
+       if [ $? -eq 0 ]; then
+               echo yes
+       else
+               echo no
+       fi
+}
+
+if [ "$has_ssp" = "" ] && [ x"$check_ssp" = x"yes" ]; then
+       has_ssp=`has_ssp_support`
+fi
+
 mkdir_p_early ${wrkdir}/bin
 
 # build install-sh
@@ -1025,6 +1047,9 @@
 PKG_DBDIR=$pkgdbdir; export PKG_DBDIR
 LOCALBASE=$prefix; export LOCALBASE
 VARBASE=$varbase; export VARBASE
+if [ x"$has_ssp" = x"no" ] && [ x"$check_ssp" = x"yes" ]; then
+_OPSYS_SUPPORTS_SSP=no; export _OPSYS_SUPPORTS_SSP
+fi
 
 # set up an example mk.conf file
 TARGET_MKCONF=${wrkdir}/mk.conf.example
@@ -1072,6 +1097,10 @@
 fi
 echo "" >> ${TARGET_MKCONF}
 
+if [ x"$has_ssp" = x"no" ] && [ x"$check_ssp" = x"yes" ]; then
+       echo "_OPSYS_SUPPORTS_SSP=      no" >> ${TARGET_MKCONF}
+fi
+
 # enable unprivileged builds if not root
 if [ "$unprivileged" = "yes" ]; then
        echo "UNPRIVILEGED=             yes" >> ${TARGET_MKCONF}
diff -r d2c0ac93d03d -r 78fb8d0c8220 mk/platform/SunOS.mk
--- a/mk/platform/SunOS.mk      Mon Nov 05 19:01:21 2018 +0000
+++ b/mk/platform/SunOS.mk      Mon Nov 05 19:26:38 2018 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: SunOS.mk,v 1.77 2017/10/10 13:57:23 jperkin Exp $
+# $NetBSD: SunOS.mk,v 1.78 2018/11/05 19:26:38 schmonz Exp $
 #
 # Variable definitions for the SunOS/Solaris operating system.
 
@@ -131,7 +131,7 @@
 _OPSYS_SUPPORTS_FORTIFY=yes
 
 # support stack protection (with GCC)
-_OPSYS_SUPPORTS_SSP=   yes
+_OPSYS_SUPPORTS_SSP?=  yes
 
 _OPSYS_CAN_CHECK_SHLIBS=       yes # requires readelf