Hacky slashy

build/config/compiler/BUILD.gn

Index: build/config/compiler/BUILD.gn
diff --git a/build/config/compiler/BUILD.gn b/build/config/compiler/BUILD.gn
index 069f10b98123f4560bee01bcdaaea8cf674e22e3..bcecf286c1335ca68d1ae81f761ce491b7925ae3 100644
--- a/build/config/compiler/BUILD.gn
+++ b/build/config/compiler/BUILD.gn
@@ -161,6 +161,8 @@ config("compiler") {
     configs += [ "//build/config/nacl:compiler" ]
   } else if (is_ios || is_mac) {
     configs += [ "//build/config/mac:compiler" ]
+  } else if (is_fuchsia) {
+    configs += [ "//build/config/fuchsia:compiler" ]
   }
 
   # Applies to all Posix systems.
@@ -298,7 +300,7 @@ config("compiler") {
 
   # Linux/Android common flags setup.
   # ---------------------------------
-  if (is_linux || is_android) {
+  if (is_linux || is_android || is_fuchsia) {
     cflags += [
       "-fPIC",
       "-pipe",  # Use pipes for communicating between sub-processes. Faster.
@@ -326,7 +328,11 @@ config("compiler") {
           "-lpthread",
         ]
       }
-      ldflags += [ "-Wl,--as-needed" ]
+      if (!is_fuchsia) {
+        # We need mxio/magenta to get linked in, even if they're not directly
+        # referenced.
+        ldflags += [ "-Wl,--as-needed" ]

[jamesr, 2017/02/18 00:55:28]

recording for posterity: you can have this flag, the only library we have that
doesn't work well is 'mxio'. You can work around this by leaving this alone and
in //build/config/fuchsia/BUILD.gn doing

ldflags = [
  "-Wl,--no-as-needed",
  "-lmxio",  // The mxio library is needed, even if the linker does not see
direct references to it
  "-Wl,--as-needed",
]

+      }
     }
   }