Treat linker warnings as errors on all POSIX platforms

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index 72eb96d94c07528ee98e90e0bdf56958f8bef7b5..bfc62e514006fd9c55b6668bbed8ef8474bb597e 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -2972,6 +2972,7 @@
     ['os_posix==1', {
       'target_defaults': {
         'ldflags': [
+          '-Wl,--fatal-warnings',

[Nico, 2014/03/16 16:56:14]

Should this only be done if werror% isn't empty?

           '-Wl,-z,now',
           '-Wl,-z,relro',
         ],
@@ -3049,7 +3050,6 @@
             'conditions' : [
               ['OS=="android"', {
                 'ldflags': [
-                  '-Wl,--fatal-warnings',
                   # Only link with needed input sections. This is to avoid
                   # getting undefined reference to __cxa_bad_typeid in the CDU
                   # library.
@@ -3131,7 +3131,6 @@
                   '-fomit-frame-pointer',
                 ],
                 'ldflags': [
-                  '-Wl,--fatal-warnings',
                   # Warn in case of text relocations.
                   '-Wl,--warn-shared-textrel',
                 ],