[tor-bugs] #5665 [Obfsproxy]: obfsproxy: "warning: -fPIC ignored for target (all code is position independent)" when compilign on Windows

Tor Bug Tracker & Wiki torproject-admin at torproject.org
Wed Apr 25 09:52:34 UTC 2012


#5665: obfsproxy: "warning: -fPIC ignored for target (all code is position
independent)" when compilign on Windows
-----------------------+----------------------------------------------------
 Reporter:  asn        |          Owner:  asn         
     Type:  defect     |         Status:  needs_review
 Priority:  normal     |      Milestone:              
Component:  Obfsproxy  |        Version:              
 Keywords:             |         Parent:              
   Points:             |   Actualpoints:              
-----------------------+----------------------------------------------------

Comment(by Sebastian):

 hrm. Here's another idea:

 {{{

 diff --git a/m4/ax_build_hardening.m4 b/m4/ax_build_hardening.m4
 index 590a00d..ad06fcc 100644
 --- a/m4/ax_build_hardening.m4
 +++ b/m4/ax_build_hardening.m4
 @@ -46,18 +46,19 @@ AC_DEFUN_ONCE([AX_ENABLE_HARDENING], [

  ### Compiler Hardening ###
  # This requires ax_check_compile_flag.m4
 -AX_CHECK_COMPILE_FLAG([-D_FORTIFY_SOURCE=2], [CFLAGS="$CFLAGS
 -D_FORTIFY_SOURCE
 -AX_CHECK_COMPILE_FLAG([-fstack-protector-all], [CFLAGS="$CFLAGS -fstack-
 protect
 -AX_CHECK_COMPILE_FLAG([-fwrapv], [CFLAGS="$CFLAGS -fwrapv"])
 -AX_CHECK_COMPILE_FLAG([-fPIE], [CFLAGS="$CFLAGS -fPIE"])
 -AX_CHECK_COMPILE_FLAG([--param ssp-buffer-size=1], [CFLAGS="$CFLAGS
 --param ssp
 -AX_CHECK_COMPILE_FLAG([-fno-strict-aliasing], [CFLAGS="$CFLAGS -fno-
 strict-alia
 -AX_CHECK_COMPILE_FLAG([-fno-strict-overflow], [CFLAGS="$CFLAGS -fno-
 strict-over
 +AX_CHECK_COMPILE_FLAG([-D_FORTIFY_SOURCE=2], [CFLAGS="$CFLAGS
 -D_FORTIFY_SOURCE
 +AX_CHECK_COMPILE_FLAG([-fstack-protector-all], [CFLAGS="$CFLAGS -fstack-
 protect
 +AX_CHECK_COMPILE_FLAG([-fwrapv], [CFLAGS="$CFLAGS -fwrapv"], [],
 [-Werror])
 +AX_CHECK_COMPILE_FLAG([-fPIE], [CFLAGS="$CFLAGS -fPIE"], [], [-Werror])
 +AX_CHECK_COMPILE_FLAG([--param ssp-buffer-size=1], [CFLAGS="$CFLAGS
 --param ssp
 +AX_CHECK_COMPILE_FLAG([-fno-strict-aliasing], [CFLAGS="$CFLAGS -fno-
 strict-alia
 +AX_CHECK_COMPILE_FLAG([-fno-strict-overflow], [CFLAGS="$CFLAGS -fno-
 strict-over

  ### Linker Hardening ###
  # This requires ax_check_link_flag.m4
 -AX_CHECK_LINK_FLAG([-pie], [LDFLAGS="$LDFLAGS -pie"])
 -AX_CHECK_LINK_FLAG([-z relro], [LDFLAGS="$LDFLAGS -z relro"])
 -AX_CHECK_LINK_FLAG([-z now], [LDFLAGS="$LDFLAGS -z now"])
 +AX_CHECK_LINK_FLAG([-pie], [LDFLAGS="$LDFLAGS -pie"], [], [-Werror])
 +AX_CHECK_LINK_FLAG([-Wl,-pie], [LDFLAGS="$LDFLAGS -Wl,-pie"], [],
 [-Werror])
 +AX_CHECK_LINK_FLAG([-z relro], [LDFLAGS="$LDFLAGS -z relro"], [],
 [-Werror])
 +AX_CHECK_LINK_FLAG([-z now], [LDFLAGS="$LDFLAGS -z now"], [], [-Werror])

  ])
 }}}

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/5665#comment:2>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online


More information about the tor-bugs mailing list