build: work around VS2015 issue in ICU <56

The particular ufile.c is from
http://bugs.icu-project.org/trac/changeset/37704
and should be OK for ICU 54 and 55.

Also, adds general mechanism for floating patches on top of ICU.

Fixes: https://github.com/nodejs/node/issues/2279
PR-URL: https://github.com/nodejs/node/pull/2283
Reviewed-By: João Reis <reis@janeasystems.com>

1 files changed, 10 insertions, 3 deletions

diff --git a/configure b/configure
index 5cb3e7a19b..cd594d6278 100755
--- a/configure
+++ b/configure
@@ -781,7 +781,7 @@ def write(filename, data):
 
 do_not_edit = '# Do not edit. Generated by the configure script.\n'
 
-def glob_to_var(dir_base, dir_sub):
+def glob_to_var(dir_base, dir_sub, patch_dir):
   list = []
   dir_all = os.path.join(dir_base, dir_sub)
   files = os.walk(dir_all)
@@ -789,7 +789,14 @@ def glob_to_var(dir_base, dir_sub):
     (path, dirs, files) = ent
     for file in files:
       if file.endswith('.cpp') or file.endswith('.c') or file.endswith('.h'):
-        list.append('%s/%s' % (dir_sub, file))
+        # srcfile uses "slash" as dir separator as its output is consumed by gyp
+        srcfile = '%s/%s' % (dir_sub, file)
+        if patch_dir:
+          patchfile = '%s/%s/%s' % (dir_base, patch_dir, file)
+          if os.path.isfile(patchfile):
+            srcfile = '%s/%s' % (patch_dir, file)
+            print 'Using version-specific floating patch %s' % patchfile
+        list.append(srcfile)
     break
   return list
 
@@ -1011,7 +1018,7 @@ def configure_intl(o):
   for i in icu_src:
     var  = 'icu_src_%s' % i
     path = '../../deps/icu/source/%s' % icu_src[i]
-    icu_config['variables'][var] = glob_to_var('tools/icu', path)
+    icu_config['variables'][var] = glob_to_var('tools/icu', path, 'patches/%s/source/%s' % (icu_ver_major, icu_src[i]) )
   # write updated icu_config.gypi with a bunch of paths
   write(icu_config_name, do_not_edit +
         pprint.pformat(icu_config, indent=2) + '\n')