In preparation for ASLR [1] support add WITH_PIE to support building with -fPIE.

This is currently an opt-in build flag. Once ASLR support is ready and stable
it should changed to opt-out and be enabled by default along with ASLR.

Each application Makefile uses opt-out to ensure that ASLR will be enabled by
default in new directories when the system is compiled with PIE/ASLR. [2]

Mark known build failures as NO_PIE for now.

The only known runtime failure was rtld.

[1] http://www.bsdcan.org/2014/schedule/events/452.en.html
Submitted by:		Shawn Webb <lattera@gmail.com>
Discussed between:	des@ and Shawn Webb [2]

3 files changed, 6 insertions, 0 deletions

diff --git a/gnu/usr.bin/gdb/gdb/Makefile b/gnu/usr.bin/gdb/gdb/Makefile
index 15eb2eb8f537..23a30729de05 100644
--- a/gnu/usr.bin/gdb/gdb/Makefile
+++ b/gnu/usr.bin/gdb/gdb/Makefile
@@ -14,5 +14,7 @@ LDFLAGS+= -Wl,-E
 DPADD=	${GDBLIBS} ${BULIBS} ${LIBM} ${LIBREADLINE} ${LIBTERMCAP} ${LIBGNUREGEX}
 LDADD=	${GDBLIBS} ${BULIBS} -lm -lreadline -ltermcap -lgnuregex
 
+NO_PIE=	yes
+
 .include <bsd.prog.mk>
 CFLAGS+=	-DDEBUGDIR=\"${DEBUGDIR}\"
diff --git a/gnu/usr.bin/gdb/gdbtui/Makefile b/gnu/usr.bin/gdb/gdbtui/Makefile
index 94dbb4babd52..d3651b488421 100644
--- a/gnu/usr.bin/gdb/gdbtui/Makefile
+++ b/gnu/usr.bin/gdb/gdbtui/Makefile
@@ -15,4 +15,6 @@ LDFLAGS+= -Wl,-E
 DPADD=	${GDBLIBS} ${BULIBS} ${LIBM} ${LIBREADLINE} ${LIBTERMCAP} ${LIBGNUREGEX}
 LDADD=	${GDBLIBS} ${BULIBS} -lm -lreadline -ltermcap -lgnuregex
 
+NO_PIE=	yes
+
 .include <bsd.prog.mk>
diff --git a/gnu/usr.bin/gdb/kgdb/Makefile b/gnu/usr.bin/gdb/kgdb/Makefile
index 30cbf3ca1f9f..9543ad0d3f42 100644
--- a/gnu/usr.bin/gdb/kgdb/Makefile
+++ b/gnu/usr.bin/gdb/kgdb/Makefile
@@ -17,4 +17,6 @@ LDADD=	${GDBLIBS} ${BULIBS} -lkvm${GDB_SUFFIX} -lm -lreadline -ltermcap \
 CFLAGS+= -Wl,-export-dynamic
 .endif
 
+NO_PIE=	yes
+
 .include <bsd.prog.mk>