GN: link executables with -rdynamic on Linux.

gn/BUILD.gn

 # Copyright 2016 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 declare_args() {
   ar = "ar"
   cc = "cc"
   cxx = "c++"
 
@@ skipping 135 matching lines @@
 
 config("release") {
   cflags = [ "-O3" ]
   defines = [ "NDEBUG" ]
 }
 
 config("executable") {
   if (is_mac) {
     ldflags = [ "-Wl,-rpath,@loader_path/." ]
   } else if (is_linux) {
-    ldflags = [ "-Wl,-rpath,\$ORIGIN" ]
+    ldflags = [
+      "-rdynamic",
+      "-Wl,-rpath,\$ORIGIN",
+    ]
   }
 }
 
 toolchain("gcc_like") {
   lib_switch = "-l"
   lib_dir_switch = "-L"
 
   tool("cc") {
     depfile = "{{output}}.d"
     command = "$compiler_prefix $cc -MMD -MF $depfile {{defines}} {{include_dirs}} {{cflags}} {{cflags_c}} $extra_cflags $extra_cflags_c -c {{source}} -o {{output}}"
@@ skipping 63 matching lines @@
   }
 
   tool("stamp") {
     command = "touch {{output}}"
   }
 
   tool("copy") {
     command = "ln -f {{source}} {{output}} 2>/dev/null || (rm -rf {{output}} && cp -af {{source}} {{output}})"
   }
 }