With "-Wl,-rpath,@loader_path/../lib" the linker embeds
@loader_path/../lib as the target binary's rpath.
Here @loader_path means the path of the binary that initiates the
loading.
With "-install_name @rpath/libfoo.dylib " the linker runtime searches
libfoo.dylib in the binary's embeded rpath.
With this change you can call dlopen() without specifying the full path
of the shared library.
Change-Id: If9beb3f6f4642a377bff603bab5ba3fdb96211bf
Before this change, path of the install name is relative to the top dir.
That means you can execute dynamically-linked binaries only in the top dir.
With this change, you can execute dynamically-linked binaries anywhere.
Change-Id: I1c6441579ffb68505ea678296aceb2e66a6df1be
So we can have the same set of module names in different host arch
/ toolchain version combinations.
Change-Id: Iec66584bf3de92aedd71a59f9dbe74b6ed025b2e
This is the result of a recent conversation around the x86 ABI
and its relationship with how we build platform images. Briefly:
- We want to use feature-based macros like ARCH_X86_HAVE_$FEATURE
instead of relying on explicit compiler macros like -DUSE_$FEATURE
- We want to allow for other x86-based arch variants, e.g. if
someone wants to build Android for a CPU that doesn't support
the NDK x86 ABI. However, we need to ensure these are not
tagged compatible by mistake (see check at the end of TARGET_linux-x86.mk)
- There are several flags which use is dubious now that we have
a dedicated toolchain to build all the x86 stuff. Comment them
as 'to be considered for removal'. We'll do the proper checks
later.
Change-Id: I7768d7c34d73e274cbf4c09ae831b55280d6bb58
While building Android with latest host gcc, it causes the following
build error:
Install: out/host/linux-x86/bin/mkbootimg
host C++: obbtool <= frameworks/base/tools/obbtool/Main.cpp
<command-line>:0:0: error: "_FORTIFY_SOURCE" redefined [-Werror]
<built-in>:0:0: note: this is the location of the previous definition
cc1plus: all warnings being treated as errors
In order to make build system happy, this patch does unset macro
_FORTIFY_SOURCE and then define it in host cflags.
Change-Id: Ic37a90f05081a2c3650b3335bc87e9e895900fb2
Compile all x86 programs on Android with -fPIE and -pie. This enables
PIE (Position Independent Executables), which helps protect Android
applications from exploitation due to memory management bugs.
Note 1: PIE *static* executables are not supported at this time and
require additional linker changes.
Note 2: This change compliments 026a85b129,
which was the exact same change, except for ARM.
Testing: Rebuilt the tree completely from scratch, and verified
that the system boots and basic functionality works in the emulator.
Change-Id: I990064c37da3d857e663b27f31fee05f689a2824
Compile all programs on Android with -fPIE and -pie. This enables
PIE (Position Independent Executables), which helps protect Android
applications from exploitation due to memory management bugs.
Stop using the armelf.x linker script. This script hard codes the
load address of the executable, defeating the position independence
PIE requires.
Note: PIE *static* executables are not supported at this time and
require additional linker changes.
Bug: 5323301
Change-Id: Ieafcc9c4f142495847e163881889d371a59d0878
While building Android with latest host gcc, it causes the following
build error:
Install: out/host/linux-x86/bin/mkbootimg
host C++: obbtool <= frameworks/base/tools/obbtool/Main.cpp
<command-line>:0:0: error: "_FORTIFY_SOURCE" redefined [-Werror]
<built-in>:0:0: note: this is the location of the previous definition
cc1plus: all warnings being treated as errors
In order to make build system happy, this patch does unset macro
_FORTIFY_SOURCE and then define it in host cflags.
Change-Id: Ic37a90f05081a2c3650b3335bc87e9e895900fb2
We used to do that unconditionally but that caused lots of spurious
warnings in gcc-4.4.x about an unrecognized gcc option.
Change-Id: Idb5118b069871859e07a7efa04914ab6ed0b1372
This is used by debug tools to find symbols for the stripped binary.
Adds ~70 bytes to each DSO, ~25000 bytes total, which is about 0.01% of the
system image.
This change only affects -eng and -userdebug builds, and does not affect -user.
Change-Id: I0c92a9e09fbc97184dea66813923568cbcc2a3fe
"lunch sdk-eng" on cygwin tries to use a gcc.exe from the
prebuild arm toolchain, but it doesn't exist. This prevents
from setting variables to point on a gcc toolchain if there
is none for the given arch.
Change-Id: I3b72220663687f9fdaacc050899aef00632f2c3c
Review and clean-up of both compiler and linker flags
to ensure proper usage and consistency for images, toolchain,
SDK, and NDK.
Change-Id: Ife75c32cd49b32345712dee28fa5f2283069a90e
Signed-off-by: Mark D Horn <mark.d.horn@intel.com>
Author: Bruce Beare <bruce.j.beare@intel.com>
