Exclude routines from fortification

Since the _FORTIFY_SOURCE feature uses some routines of Glibc, they need to
be excluded from the fortification.

On top of that:
 - some tests explicitly verify that some level of fortification works
   appropriately, we therefore shouldn't modify the level set for them.
 - some objects need to be build with optimization disabled, which
   prevents _FORTIFY_SOURCE to be used for them.

Assembler files that implement architecture specific versions of the
fortified routines were not excluded from _FORTIFY_SOURCE as there is no
C header included that would impact their behavior.

Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/login/Makefile b/login/Makefile
index 13b155d344..74216cbcb2 100644
--- a/login/Makefile
+++ b/login/Makefile
@@ -66,6 +66,12 @@ include ../Rules
 CFLAGS-getpt.c += -fexceptions
 CFLAGS-getlogin_r.c += $(config-cflags-wno-ignored-attributes)
 
+# Exclude fortified routines from being built with _FORTIFY_SOURCE
+routines_no_fortify += \
+  getlogin_r \
+  ptsname_r \
+  # routines_no_fortify
+
 ifeq (yesyes,$(have-fpie)$(build-shared))
 pt_chown-cflags += $(pie-ccflag)
 endif