GYP build for ARM untrusted runtime.

build/common.gypi

Index: build/common.gypi
===================================================================
--- build/common.gypi	(revision 8056)
+++ build/common.gypi	(working copy)
@@ -298,6 +298,7 @@
                 '-fno-exceptions',
                 '-Wall',
                 '-fPIC',
+                '--sysroot=<(sysroot)',

[Mark Seaborn, 2012/03/22 17:13:21]

This is for building trusted code, right?  Why this change?

[Nikolay, 2012/03/23 11:35:20]

Trusted code builds on ARM for me otherwise.
From what I've seen, when build system 
computes dependencies, it doesn't seem to look at cflags_cc,
and so unable to find target system-wide headers, such as zlib.h. Also this way
it looks more natural. Or there are hidden reasons why it has to be that way?

On 2012/03/22 17:13:21, Mark Seaborn wrote:

[Nikolay, 2012/03/26 13:29:56]

Yep, I meant it doesn't. Maybe on buildbots openssl-dev installed in
/usr/include is used by crosscompiler.
I see following error:

V=1 make
/home/olonho/x-tools/arm-unknown-linux-gnueabi.good/bin/arm-unknown-linux-gnueabi-gcc
'-DNACL_LINUX=1' '-DNACL_OSX=0' '-DNACL_WINDOWS=0' '-D_BSD_SOURCE=1'
'-D_POSIX_C_SOURCE=199506' '-D_XOPEN_SOURCE=600' '-D_GNU_SOURCE=1'
'-D__STDC_LIMIT_MACROS=1' '-D__STDC_FORMAT_MACROS' '-DNACL_STANDALONE=1'
'-DNACL_BUILD_ARCH=arm' '-DNACL_BUILD_SUBARCH=32' '-DNACL_TARGET_ARCH=arm'
'-DNACL_TARGET_SUBARCH=32' '-D_DEBUG' -Inative_client/src/third_party -I. 
-Werror -pthread -fno-exceptions -Wall -fPIC -Wextra -Wno-long-long
-Wswitch-enum -Wsign-compare -Wno-abi -march=armv7-a -mtune=cortex-a8 -mfpu=neon
-mfloat-abi=softfp -fno-exceptions -Wall -fPIC -Wno-long-long -O0 -g  -MMD -MF
out/Debug/.deps/out/Debug/obj.target/platform/native_client/src/shared/platform/nacl_global_secure_random.o.d.raw
 -c -o
out/Debug/obj.target/platform/native_client/src/shared/platform/nacl_global_secure_random.o
native_client/src/shared/platform/nacl_global_secure_random.c
In file included from
./native_client/src/shared/platform/nacl_secure_random.h:22,
                 from
./native_client/src/shared/platform/nacl_global_secure_random.h:14,
                 from
native_client/src/shared/platform/nacl_global_secure_random.c:11:
./native_client/src/shared/platform/linux/nacl_secure_random_types.h:32:26:
error: openssl/aes.h: No such file or directory
In file included from
./native_client/src/shared/platform/nacl_secure_random.h:22,
                 from
./native_client/src/shared/platform/nacl_global_secure_random.h:14,
                 from
native_client/src/shared/platform/nacl_global_secure_random.c:11:
./native_client/src/shared/platform/linux/nacl_secure_random_types.h:43: error:
expected specifier-qualifier-list before 'AES_KEY'

But to me this change looks pretty harmless, as just explicitly sets correct
sysroot for all calls of C compiler. 

               ],
               'cflags_cc': [
                 '--sysroot=<(sysroot)',