mac: In static library builds, link against a static libc++.a

chrome/tools/build/mac/verify_order

Index: chrome/tools/build/mac/verify_order
diff --git a/chrome/tools/build/mac/verify_order b/chrome/tools/build/mac/verify_order
index 3d5d644a4c484afbcc1dd5941daf5332e81a87c8..88c3b97262b6e2d23c578cebab39fdfc3a7357a7 100755
--- a/chrome/tools/build/mac/verify_order
+++ b/chrome/tools/build/mac/verify_order
@@ -12,6 +12,8 @@
 #
 # This script can be used to verify that all of the global text symbols in
 # a Mach-O file are accounted for in an order file.
+#
+# Also check that the file does not depend on either of libstdc++ or libc++.

[Nico, 2015/10/23 13:05:33]

Looks like this script currently also runs in component builds (where we do
depend on libc++), so this doesn't quite work as-is.

Options:
1. Don't run this script in component builds, it isn't useful there anyhow.
2. Do the lib(std)?c++ check in a separate script
  a) that runs only for Chromium Framework
  b) that runs for every executable and shared_library

I kind of lean 1 (makes the build slightly faster, and should catch everything
in practice), but I can see 2b happening too.

[Mark Mentovai, 2015/10/23 13:56:36]

Go (1). This script is pointless with component=shared_library.

[Nico, 2015/10/23 15:39:29]

Done.

 
 if [ ${#} -ne 2 ] ; then
   echo "usage: ${0} LAST_SYMBOL MACH_O_FILE" >& 2
@@ -40,4 +42,18 @@ if [ ${?} -eq 0 ] || [ -n "${UNORDERED_SYMBOLS}" ] ; then
   exit 1
 fi
 
+LIBS=$(otool -L "${MACH_O_FILE}")
+if [ ${?} -ne 0 ] ; then
+  echo "${0}: failed to get libraries in ${MACH_O_FILE}" >& 2
+  exit 1
+fi
+if grep -q libstdc++ <<< ${LIBS} ; then

[Mark Mentovai, 2015/10/23 13:56:36]

+ has a special meaning in regular expressions. You need to add -F to turn off
regex (like the other greps in this file do). Or you can use grep -Eq
"lib(std)?c\+\" for a single grep to match both variants.

[Nico, 2015/10/23 15:39:29]

Done.

+  echo "${0}: ${MACH_O_FILE} depends on libstdc++" >& 2
+  exit 1
+fi
+if grep -q libc++ <<< ${LIBS} ; then
+  echo "${0}: ${MACH_O_FILE} depends on libc++" >& 2
+  exit 1
+fi
+
 exit 0