[GN]: Support for loadable modules

build/toolchain/mac/BUILD.gn

Index: build/toolchain/mac/BUILD.gn
diff --git a/build/toolchain/mac/BUILD.gn b/build/toolchain/mac/BUILD.gn
index b0c233a19a43f6ee20e7abb9007a845825674fdc..e2b4ad43505fec77fca2bf74f72eba52419769e4 100644
--- a/build/toolchain/mac/BUILD.gn
+++ b/build/toolchain/mac/BUILD.gn
@@ -119,9 +119,9 @@ template("mac_toolchain") {
       rspfile = dylib + ".rsp"
 
       # These variables are not built into GN but are helpers that implement
-      # (1) linking to produce a .so, (2) extracting the symbols from that file
-      # to a temporary file, (3) if the temporary file has differences from the
-      # existing .TOC file, overwrite it, otherwise, don't change it.
+      # (1) linking to produce a .dylib, (2) extracting the symbols from that
+      # file to a temporary file, (3) if the temporary file has differences from
+      # the existing .TOC file, overwrite it, otherwise, don't change it.
       #
       # As a special case, if the library reexports symbols from other dynamic
       # libraries, we always update the .TOC and skip the temporary file and
@@ -144,7 +144,7 @@ template("mac_toolchain") {
 
       rspfile_content = "{{inputs_newline}}"
 
-      description = "SOLINK {{output}}"
+      description = "DYLINK {{output}}"
 
       # Use this for {{output_extension}} expansions unless a target manually
       # overrides it (in which case {{output_extension}} will be what the target
@@ -168,6 +168,33 @@ template("mac_toolchain") {
       depend_output = tocname
     }
 
+    #    tool("solink") {

[Bons, 2015/10/06 20:29:19]

This will be called solink with the above changed to dylink.

Or if we want to keep with gyp conventions, this would be named solink_module

+    #      sofile = "{{root_out_dir}}/{{target_output_name}}{{output_extension}}"  # eg "./libfoo.so"
+    #      rspfile = sofile + ".rsp"
+    #
+    #      link_command = "$ld -bundle {{ldflags}} -o $sofile -Wl,-filelist,$rspfile"
+    #      if (is_component_build) {
+    #        link_command += " -Wl,-install_name,@rpath/{{target_output_name}}{{output_extension}}"
+    #      }
+    #      link_command += " {{solibs}} {{libs}}"
+    #      command = link_command
+    #
+    #      rspfile_content = "{{inputs_newline}}"
+    #
+    #      description = "SOLINK {{output}}"
+    #
+    #      # Use this for {{output_extension}} expansions unless a target manually
+    #      # overrides it (in which case {{output_extension}} will be what the target
+    #      # specifies).
+    #      default_output_extension = ".so"
+    #
+    #      output_prefix = "lib"
+    #
+    #      outputs = [
+    #        sofile
+    #      ]
+    #    }
+
     tool("link") {
       outfile = "{{root_out_dir}}/{{target_output_name}}{{output_extension}}"
       rspfile = "$outfile.rsp"