Revert of [build] Use sysroot for linux compilation with clang

gypfiles/standalone.gypi

Index: gypfiles/standalone.gypi
diff --git a/gypfiles/standalone.gypi b/gypfiles/standalone.gypi
index 9aeed5a14b4a24bb1d4828ec4b0e811434ce7c58..3191641310d89670860a0079f7cbecf682b7442f 100644
--- a/gypfiles/standalone.gypi
+++ b/gypfiles/standalone.gypi
@@ -63,52 +63,21 @@
               'host_arch%': 'ia32',
             }],
           ],
-
-          # By default we build against a stable sysroot image to avoid
-          # depending on the packages installed on the local machine. Set this
-          # to 0 to build against locally installed headers and libraries (e.g.
-          # if packaging for a linux distro)
-          'use_sysroot%': 1,
         },
         'host_arch%': '<(host_arch)',
         'target_arch%': '<(host_arch)',
-        'use_sysroot%': '<(use_sysroot)',
         'base_dir%': '<!(cd <(DEPTH) && python -c "import os; print os.getcwd()")',
 
         # Instrument for code coverage and use coverage wrapper to exclude some
         # files. Uses gcov if clang=0 is set explicitly. Otherwise,
         # sanitizer_coverage must be set too.
         'coverage%': 0,
-
-        # Default sysroot if no sysroot can be provided.
-        'sysroot%': '',
-
-        'conditions': [
-          # The system root for linux builds.
-          ['OS=="linux" and use_sysroot==1', {
-            'conditions': [
-              ['target_arch=="arm"', {
-                'sysroot%': '<!(cd <(DEPTH) && pwd -P)/build/linux/debian_wheezy_arm-sysroot',
-              }],
-              ['target_arch=="x64"', {
-                'sysroot%': '<!(cd <(DEPTH) && pwd -P)/build/linux/debian_wheezy_amd64-sysroot',
-              }],
-              ['target_arch=="ia32"', {
-                'sysroot%': '<!(cd <(DEPTH) && pwd -P)/build/linux/debian_wheezy_i386-sysroot',
-              }],
-              ['target_arch=="mipsel"', {
-                'sysroot%': '<!(cd <(DEPTH) && pwd -P)/build/linux/debian_wheezy_mips-sysroot',
-              }],
-            ],
-          }], # OS=="linux" and use_sysroot==1
-        ],
       },
       'base_dir%': '<(base_dir)',
       'host_arch%': '<(host_arch)',
       'target_arch%': '<(target_arch)',
       'v8_target_arch%': '<(target_arch)',
       'coverage%': '<(coverage)',
-      'sysroot%': '<(sysroot)',
       'asan%': 0,
       'lsan%': 0,
       'msan%': 0,
@@ -192,7 +161,6 @@
     'test_isolation_mode%': '<(test_isolation_mode)',
     'fastbuild%': '<(fastbuild)',
     'coverage%': '<(coverage)',
-    'sysroot%': '<(sysroot)',
 
     # Add a simple extras solely for the purpose of the cctests
     'v8_extra_library_files': ['../test/cctest/test-extra.js'],
@@ -659,18 +627,6 @@
               '-B<(base_dir)/third_party/binutils/Linux_x64/Release/bin',
             ],
           }],
-          ['sysroot!="" and clang==1', {
-            'target_conditions': [
-              ['_toolset=="target"', {
-                'cflags': [
-                  '--sysroot=<(sysroot)',
-                ],
-                'ldflags': [
-                  '--sysroot=<(sysroot)',
-                  '<!(<(DEPTH)/build/linux/sysroot_ld_path.sh <(sysroot))',
-                ],
-              }]]
-          }],
         ],
       },
     }],