Use response files in the GN build for shared libs and executables

build/toolchain/gcc_toolchain.gni

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This template defines a GCC toolchain.
 #
 # It requires the following variables specifying the executables to run:
 #  - cc
 #  - cxx
 #  - ar
@@ skipping 54 matching lines @@
       deps = "gcc"
     }
     tool("cxx") {
       # cflags_pch_cc
       command = "$cxx -MMD -MF \$out.d \$defines \$includes \$cflags \$cflags_cc -c \$in -o \$out"
       description = "CXX \$out"
       depfile = "\$out.d"
       deps = "gcc"
     }
     tool("alink") {
-      command = "rm -f \$out && $ar rcs \$out \$in"
+      command = "rm -f \$out && $ar rcs \$out @\$rspfile"
       description = "AR \$out"
+      rspfile = "\$out.rsp"
+      rspfile_content = "\$in"
     }
     tool("solink") {
-      command = "if [ ! -e \$lib -o ! -e \${lib}.TOC ]; then $ld -shared \$ldflags -o \$lib -Wl,-soname=\$soname -Wl,--whole-archive \$in \$solibs -Wl,--no-whole-archive \$libs && { readelf -d \${lib} | grep SONAME ; nm -gD -f p \${lib} | cut -f1-2 -d' '; } > \${lib}.TOC; else $ld -shared \$ldflags -o \$lib -Wl,-soname=\$soname -Wl,--whole-archive \$in \$solibs -Wl,--no-whole-archive $libs_section_prefix \$libs $libs_section_postfix && { readelf -d \${lib} | grep SONAME ; nm -gD -f p \${lib} | cut -f1-2 -d' '; } > \${lib}.tmp && if ! cmp -s \${lib}.tmp \${lib}.TOC; then mv \${lib}.tmp \${lib}.TOC ; fi; fi"
+      command = "if [ ! -e \$lib -o ! -e \${lib}.TOC ]; then $ld -shared \$ldflags -o \$lib -Wl,-soname=\$soname @\$rspfile && { readelf -d \${lib} | grep SONAME ; nm -gD -f p \${lib} | cut -f1-2 -d' '; } > \${lib}.TOC; else $ld -shared \$ldflags -o \$lib -Wl,-soname=\$soname -Wl,--whole-archive \$in \$solibs -Wl,--no-whole-archive $libs_section_prefix \$libs $libs_section_postfix && { readelf -d \${lib} | grep SONAME ; nm -gD -f p \${lib} | cut -f1-2 -d' '; } > \${lib}.tmp && if ! cmp -s \${lib}.tmp \${lib}.TOC; then mv \${lib}.tmp \${lib}.TOC ; fi; fi"
       description = "SOLINK \$lib"
+      rspfile = "\$out.rsp"

[Nico, 2014/05/30 16:37:24]

Note that this won't work on OS X in ninja 1.4, the current version, because
"Chromium Framework" contains a space, so $out becomes `"Chromium Framework"`
(with quotes) and ninja will write the rspfile to `"Chromium Framework".rsp`
(with quotes).

This is fixed on trunk, and 1.5 should hopefully be in depot_tools within a
month.

[brettw, 2014/05/30 17:24:39]

Okay, I require a trunk Ninja build for Windows to work, too, so this seems like
par for the course.

+      rspfile_content = "-Wl,--whole-archive \$in \$solibs -Wl,--no-whole-archive \$libs"

[brettw, 2014/05/30 00:49:31]

This is copied from GYP. Not sure why it includes these flags in the rspfile.

[Nico, 2014/05/30 16:37:24]

Doesn't matter too much I suppose; I felt putting most stuff into the rspfile is
more consistent when I did the gyp change iirc

       #pool = "link_pool"
       restat = "1"
     }
     tool("link") {
-      command = "$ld \$ldflags -o \$out -Wl,--start-group \$in \$solibs -Wl,--end-group $libs_section_prefix \$libs $libs_section_postfix"
+      command = "$ld \$ldflags -o \$out -Wl,--start-group @\$rspfile \$solibs -Wl,--end-group $libs_section_prefix \$libs $libs_section_postfix"
       description = "LINK \$out"
+      rspfile = "\$out.rsp"
+      rspfile_content = "\$in"
       #pool = "link_pool"
     }
     tool("stamp") {
       command = "\${postbuilds}touch \$out"
       description = "STAMP \$out"
     }
     tool("copy") {
       command = "ln -f \$in \$out 2>/dev/null || (rm -rf \$out && cp -af \$in \$out)"
       description = "COPY \$in \$out"
     }
 
     # When invoking this toolchain not as the default one, these args will be
     # passed to the build. They are ignored when this is the default toolchain.
     toolchain_args() {
       cpu_arch = invoker.toolchain_cpu_arch
       os = invoker.toolchain_os
     }
   }
 }