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

build/toolchain/gcc_toolchain.gni

Index: build/toolchain/gcc_toolchain.gni
diff --git a/build/toolchain/gcc_toolchain.gni b/build/toolchain/gcc_toolchain.gni
index 91baa11b8473190d519cc501fb01378a5a5a6147..bc5288300fa43790180cb7445a37cfcb234c7aad 100644
--- a/build/toolchain/gcc_toolchain.gni
+++ b/build/toolchain/gcc_toolchain.gni
@@ -72,18 +72,24 @@ template("gcc_toolchain") {
       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") {