Allow most third_party targets to use system libraries if asked.

This extends the pattern in freetype2 to expat, icu, libjpeg-turbo, libpng, libwebp, and zlib, and gives all these an arg to control which to use.

Homebrew doesn't have dng_sdk, piex, or sftnly, or I'd have done the same for them too.

BUG=skia:

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4260

DOCS_PREVIEW= https://skia.org/?cl=4260

Change-Id: I82e780502bf2217336e791787f172a6fc8f55460
Reviewed-on: https://skia-review.googlesource.com/4260
Commit-Queue: Mike Klein <mtklein@chromium.org>
Reviewed-by: Hal Canary <halcanary@google.com>

1 files changed, 200 insertions, 193 deletions

diff --git a/third_party/icu/BUILD.gn b/third_party/icu/BUILD.gn
index 9342c8f7dd..e3815ee64f 100644
--- a/third_party/icu/BUILD.gn
+++ b/third_party/icu/BUILD.gn
@@ -4,202 +4,209 @@
 # found in the LICENSE file.
 
 declare_args() {
+  skia_use_system_icu = false
 }
 
 import("../third_party.gni")
 
-third_party("icu") {
-  public_include_dirs = [ "../externals/icu/source/common" ]
-  configs -= [ "//gn:no_rtti" ]
-  if (!is_win) {
-    libs = [ "dl" ]
+if (skia_use_system_icu) {
+  system("icu") {
+    libs = [ "icuuc" ]
+  }
+} else {
+  third_party("icu") {
+    public_include_dirs = [ "../externals/icu/source/common" ]
+    configs -= [ "//gn:no_rtti" ]
+    if (!is_win) {
+      libs = [ "dl" ]
+    }
+    defines = [
+      # http://userguide.icu-project.org/howtouseicu
+      "U_COMMON_IMPLEMENTATION",
+      "U_STATIC_IMPLEMENTATION",
+    ]
+    sources = [
+      "../externals/icu/source/common/appendable.cpp",
+      "../externals/icu/source/common/bmpset.cpp",
+      "../externals/icu/source/common/brkeng.cpp",
+      "../externals/icu/source/common/brkiter.cpp",
+      "../externals/icu/source/common/bytestream.cpp",
+      "../externals/icu/source/common/bytestrie.cpp",
+      "../externals/icu/source/common/bytestriebuilder.cpp",
+      "../externals/icu/source/common/bytestrieiterator.cpp",
+      "../externals/icu/source/common/caniter.cpp",
+      "../externals/icu/source/common/chariter.cpp",
+      "../externals/icu/source/common/charstr.cpp",
+      "../externals/icu/source/common/cmemory.c",
+      "../externals/icu/source/common/cstring.c",
+      "../externals/icu/source/common/cwchar.c",
+      "../externals/icu/source/common/dictbe.cpp",
+      "../externals/icu/source/common/dictionarydata.cpp",
+      "../externals/icu/source/common/dtintrv.cpp",
+      "../externals/icu/source/common/errorcode.cpp",
+      "../externals/icu/source/common/filteredbrk.cpp",
+      "../externals/icu/source/common/filterednormalizer2.cpp",
+      "../externals/icu/source/common/icudataver.c",
+      "../externals/icu/source/common/icuplug.cpp",
+      "../externals/icu/source/common/listformatter.cpp",
+      "../externals/icu/source/common/loadednormalizer2impl.cpp",
+      "../externals/icu/source/common/locavailable.cpp",
+      "../externals/icu/source/common/locbased.cpp",
+      "../externals/icu/source/common/locdispnames.cpp",
+      "../externals/icu/source/common/locid.cpp",
+      "../externals/icu/source/common/loclikely.cpp",
+      "../externals/icu/source/common/locmap.c",
+      "../externals/icu/source/common/locresdata.cpp",
+      "../externals/icu/source/common/locutil.cpp",
+      "../externals/icu/source/common/messagepattern.cpp",
+      "../externals/icu/source/common/normalizer2.cpp",
+      "../externals/icu/source/common/normalizer2impl.cpp",
+      "../externals/icu/source/common/normlzr.cpp",
+      "../externals/icu/source/common/parsepos.cpp",
+      "../externals/icu/source/common/patternprops.cpp",
+      "../externals/icu/source/common/pluralmap.cpp",
+      "../externals/icu/source/common/propname.cpp",
+      "../externals/icu/source/common/propsvec.c",
+      "../externals/icu/source/common/punycode.cpp",
+      "../externals/icu/source/common/putil.cpp",
+      "../externals/icu/source/common/rbbi.cpp",
+      "../externals/icu/source/common/rbbidata.cpp",
+      "../externals/icu/source/common/rbbinode.cpp",
+      "../externals/icu/source/common/rbbirb.cpp",
+      "../externals/icu/source/common/rbbiscan.cpp",
+      "../externals/icu/source/common/rbbisetb.cpp",
+      "../externals/icu/source/common/rbbistbl.cpp",
+      "../externals/icu/source/common/rbbitblb.cpp",
+      "../externals/icu/source/common/resbund.cpp",
+      "../externals/icu/source/common/resbund_cnv.cpp",
+      "../externals/icu/source/common/resource.cpp",
+      "../externals/icu/source/common/ruleiter.cpp",
+      "../externals/icu/source/common/schriter.cpp",
+      "../externals/icu/source/common/serv.cpp",
+      "../externals/icu/source/common/servlk.cpp",
+      "../externals/icu/source/common/servlkf.cpp",
+      "../externals/icu/source/common/servls.cpp",
+      "../externals/icu/source/common/servnotf.cpp",
+      "../externals/icu/source/common/servrbf.cpp",
+      "../externals/icu/source/common/servslkf.cpp",
+      "../externals/icu/source/common/sharedobject.cpp",
+      "../externals/icu/source/common/simplepatternformatter.cpp",
+      "../externals/icu/source/common/stringpiece.cpp",
+      "../externals/icu/source/common/stringtriebuilder.cpp",
+      "../externals/icu/source/common/uarrsort.c",
+      "../externals/icu/source/common/ubidi.c",
+      "../externals/icu/source/common/ubidi_props.c",
+      "../externals/icu/source/common/ubidiln.c",
+      "../externals/icu/source/common/ubidiwrt.c",
+      "../externals/icu/source/common/ubrk.cpp",
+      "../externals/icu/source/common/ucase.cpp",
+      "../externals/icu/source/common/ucasemap.cpp",
+      "../externals/icu/source/common/ucasemap_titlecase_brkiter.cpp",
+      "../externals/icu/source/common/ucat.c",
+      "../externals/icu/source/common/uchar.c",
+      "../externals/icu/source/common/ucharstrie.cpp",
+      "../externals/icu/source/common/ucharstriebuilder.cpp",
+      "../externals/icu/source/common/ucharstrieiterator.cpp",
+      "../externals/icu/source/common/uchriter.cpp",
+      "../externals/icu/source/common/ucln_cmn.cpp",
+      "../externals/icu/source/common/ucmndata.c",
+      "../externals/icu/source/common/ucnv.c",
+      "../externals/icu/source/common/ucnv2022.cpp",
+      "../externals/icu/source/common/ucnv_bld.cpp",
+      "../externals/icu/source/common/ucnv_cb.c",
+      "../externals/icu/source/common/ucnv_cnv.c",
+      "../externals/icu/source/common/ucnv_ct.c",
+      "../externals/icu/source/common/ucnv_err.c",
+      "../externals/icu/source/common/ucnv_ext.cpp",
+      "../externals/icu/source/common/ucnv_io.cpp",
+      "../externals/icu/source/common/ucnv_lmb.c",
+      "../externals/icu/source/common/ucnv_set.c",
+      "../externals/icu/source/common/ucnv_u16.c",
+      "../externals/icu/source/common/ucnv_u32.c",
+      "../externals/icu/source/common/ucnv_u7.c",
+      "../externals/icu/source/common/ucnv_u8.c",
+      "../externals/icu/source/common/ucnvbocu.cpp",
+      "../externals/icu/source/common/ucnvdisp.c",
+      "../externals/icu/source/common/ucnvhz.c",
+      "../externals/icu/source/common/ucnvisci.c",
+      "../externals/icu/source/common/ucnvlat1.c",
+      "../externals/icu/source/common/ucnvmbcs.cpp",
+      "../externals/icu/source/common/ucnvscsu.c",
+      "../externals/icu/source/common/ucnvsel.cpp",
+      "../externals/icu/source/common/ucol_swp.cpp",
+      "../externals/icu/source/common/udata.cpp",
+      "../externals/icu/source/common/udatamem.c",
+      "../externals/icu/source/common/udataswp.c",
+      "../externals/icu/source/common/uenum.c",
+      "../externals/icu/source/common/uhash.c",
+      "../externals/icu/source/common/uhash_us.cpp",
+      "../externals/icu/source/common/uidna.cpp",
+      "../externals/icu/source/common/uinit.cpp",
+      "../externals/icu/source/common/uinvchar.c",
+      "../externals/icu/source/common/uiter.cpp",
+      "../externals/icu/source/common/ulist.c",
+      "../externals/icu/source/common/ulistformatter.cpp",
+      "../externals/icu/source/common/uloc.cpp",
+      "../externals/icu/source/common/uloc_keytype.cpp",
+      "../externals/icu/source/common/uloc_tag.c",
+      "../externals/icu/source/common/umapfile.c",
+      "../externals/icu/source/common/umath.c",
+      "../externals/icu/source/common/umutex.cpp",
+      "../externals/icu/source/common/unames.cpp",
+      "../externals/icu/source/common/unifiedcache.cpp",
+      "../externals/icu/source/common/unifilt.cpp",
+      "../externals/icu/source/common/unifunct.cpp",
+      "../externals/icu/source/common/uniset.cpp",
+      "../externals/icu/source/common/uniset_closure.cpp",
+      "../externals/icu/source/common/uniset_props.cpp",
+      "../externals/icu/source/common/unisetspan.cpp",
+      "../externals/icu/source/common/unistr.cpp",
+      "../externals/icu/source/common/unistr_case.cpp",
+      "../externals/icu/source/common/unistr_case_locale.cpp",
+      "../externals/icu/source/common/unistr_cnv.cpp",
+      "../externals/icu/source/common/unistr_props.cpp",
+      "../externals/icu/source/common/unistr_titlecase_brkiter.cpp",
+      "../externals/icu/source/common/unorm.cpp",
+      "../externals/icu/source/common/unormcmp.cpp",
+      "../externals/icu/source/common/uobject.cpp",
+      "../externals/icu/source/common/uprops.cpp",
+      "../externals/icu/source/common/ures_cnv.c",
+      "../externals/icu/source/common/uresbund.cpp",
+      "../externals/icu/source/common/uresdata.cpp",
+      "../externals/icu/source/common/uresource.cpp",
+      "../externals/icu/source/common/usc_impl.c",
+      "../externals/icu/source/common/uscript.c",
+      "../externals/icu/source/common/uscript_props.cpp",
+      "../externals/icu/source/common/uset.cpp",
+      "../externals/icu/source/common/uset_props.cpp",
+      "../externals/icu/source/common/usetiter.cpp",
+      "../externals/icu/source/common/ushape.cpp",
+      "../externals/icu/source/common/usprep.cpp",
+      "../externals/icu/source/common/ustack.cpp",
+      "../externals/icu/source/common/ustr_cnv.cpp",
+      "../externals/icu/source/common/ustr_titlecase_brkiter.cpp",
+      "../externals/icu/source/common/ustr_wcs.cpp",
+      "../externals/icu/source/common/ustrcase.cpp",
+      "../externals/icu/source/common/ustrcase_locale.cpp",
+      "../externals/icu/source/common/ustrenum.cpp",
+      "../externals/icu/source/common/ustrfmt.c",
+      "../externals/icu/source/common/ustring.cpp",
+      "../externals/icu/source/common/ustrtrns.cpp",
+      "../externals/icu/source/common/utext.cpp",
+      "../externals/icu/source/common/utf_impl.c",
+      "../externals/icu/source/common/util.cpp",
+      "../externals/icu/source/common/util_props.cpp",
+      "../externals/icu/source/common/utrace.c",
+      "../externals/icu/source/common/utrie.cpp",
+      "../externals/icu/source/common/utrie2.cpp",
+      "../externals/icu/source/common/utrie2_builder.cpp",
+      "../externals/icu/source/common/uts46.cpp",
+      "../externals/icu/source/common/utypes.c",
+      "../externals/icu/source/common/uvector.cpp",
+      "../externals/icu/source/common/uvectr32.cpp",
+      "../externals/icu/source/common/uvectr64.cpp",
+      "../externals/icu/source/common/wintz.c",
+    ]
+    sources += [ "../externals/icu/$current_os/icudtl_dat.S" ]
   }
-  defines = [
-    # http://userguide.icu-project.org/howtouseicu
-    "U_COMMON_IMPLEMENTATION",
-    "U_STATIC_IMPLEMENTATION",
-  ]
-  sources = [
-    "../externals/icu/source/common/appendable.cpp",
-    "../externals/icu/source/common/bmpset.cpp",
-    "../externals/icu/source/common/brkeng.cpp",
-    "../externals/icu/source/common/brkiter.cpp",
-    "../externals/icu/source/common/bytestream.cpp",
-    "../externals/icu/source/common/bytestrie.cpp",
-    "../externals/icu/source/common/bytestriebuilder.cpp",
-    "../externals/icu/source/common/bytestrieiterator.cpp",
-    "../externals/icu/source/common/caniter.cpp",
-    "../externals/icu/source/common/chariter.cpp",
-    "../externals/icu/source/common/charstr.cpp",
-    "../externals/icu/source/common/cmemory.c",
-    "../externals/icu/source/common/cstring.c",
-    "../externals/icu/source/common/cwchar.c",
-    "../externals/icu/source/common/dictbe.cpp",
-    "../externals/icu/source/common/dictionarydata.cpp",
-    "../externals/icu/source/common/dtintrv.cpp",
-    "../externals/icu/source/common/errorcode.cpp",
-    "../externals/icu/source/common/filteredbrk.cpp",
-    "../externals/icu/source/common/filterednormalizer2.cpp",
-    "../externals/icu/source/common/icudataver.c",
-    "../externals/icu/source/common/icuplug.cpp",
-    "../externals/icu/source/common/listformatter.cpp",
-    "../externals/icu/source/common/loadednormalizer2impl.cpp",
-    "../externals/icu/source/common/locavailable.cpp",
-    "../externals/icu/source/common/locbased.cpp",
-    "../externals/icu/source/common/locdispnames.cpp",
-    "../externals/icu/source/common/locid.cpp",
-    "../externals/icu/source/common/loclikely.cpp",
-    "../externals/icu/source/common/locmap.c",
-    "../externals/icu/source/common/locresdata.cpp",
-    "../externals/icu/source/common/locutil.cpp",
-    "../externals/icu/source/common/messagepattern.cpp",
-    "../externals/icu/source/common/normalizer2.cpp",
-    "../externals/icu/source/common/normalizer2impl.cpp",
-    "../externals/icu/source/common/normlzr.cpp",
-    "../externals/icu/source/common/parsepos.cpp",
-    "../externals/icu/source/common/patternprops.cpp",
-    "../externals/icu/source/common/pluralmap.cpp",
-    "../externals/icu/source/common/propname.cpp",
-    "../externals/icu/source/common/propsvec.c",
-    "../externals/icu/source/common/punycode.cpp",
-    "../externals/icu/source/common/putil.cpp",
-    "../externals/icu/source/common/rbbi.cpp",
-    "../externals/icu/source/common/rbbidata.cpp",
-    "../externals/icu/source/common/rbbinode.cpp",
-    "../externals/icu/source/common/rbbirb.cpp",
-    "../externals/icu/source/common/rbbiscan.cpp",
-    "../externals/icu/source/common/rbbisetb.cpp",
-    "../externals/icu/source/common/rbbistbl.cpp",
-    "../externals/icu/source/common/rbbitblb.cpp",
-    "../externals/icu/source/common/resbund.cpp",
-    "../externals/icu/source/common/resbund_cnv.cpp",
-    "../externals/icu/source/common/resource.cpp",
-    "../externals/icu/source/common/ruleiter.cpp",
-    "../externals/icu/source/common/schriter.cpp",
-    "../externals/icu/source/common/serv.cpp",
-    "../externals/icu/source/common/servlk.cpp",
-    "../externals/icu/source/common/servlkf.cpp",
-    "../externals/icu/source/common/servls.cpp",
-    "../externals/icu/source/common/servnotf.cpp",
-    "../externals/icu/source/common/servrbf.cpp",
-    "../externals/icu/source/common/servslkf.cpp",
-    "../externals/icu/source/common/sharedobject.cpp",
-    "../externals/icu/source/common/simplepatternformatter.cpp",
-    "../externals/icu/source/common/stringpiece.cpp",
-    "../externals/icu/source/common/stringtriebuilder.cpp",
-    "../externals/icu/source/common/uarrsort.c",
-    "../externals/icu/source/common/ubidi.c",
-    "../externals/icu/source/common/ubidi_props.c",
-    "../externals/icu/source/common/ubidiln.c",
-    "../externals/icu/source/common/ubidiwrt.c",
-    "../externals/icu/source/common/ubrk.cpp",
-    "../externals/icu/source/common/ucase.cpp",
-    "../externals/icu/source/common/ucasemap.cpp",
-    "../externals/icu/source/common/ucasemap_titlecase_brkiter.cpp",
-    "../externals/icu/source/common/ucat.c",
-    "../externals/icu/source/common/uchar.c",
-    "../externals/icu/source/common/ucharstrie.cpp",
-    "../externals/icu/source/common/ucharstriebuilder.cpp",
-    "../externals/icu/source/common/ucharstrieiterator.cpp",
-    "../externals/icu/source/common/uchriter.cpp",
-    "../externals/icu/source/common/ucln_cmn.cpp",
-    "../externals/icu/source/common/ucmndata.c",
-    "../externals/icu/source/common/ucnv.c",
-    "../externals/icu/source/common/ucnv2022.cpp",
-    "../externals/icu/source/common/ucnv_bld.cpp",
-    "../externals/icu/source/common/ucnv_cb.c",
-    "../externals/icu/source/common/ucnv_cnv.c",
-    "../externals/icu/source/common/ucnv_ct.c",
-    "../externals/icu/source/common/ucnv_err.c",
-    "../externals/icu/source/common/ucnv_ext.cpp",
-    "../externals/icu/source/common/ucnv_io.cpp",
-    "../externals/icu/source/common/ucnv_lmb.c",
-    "../externals/icu/source/common/ucnv_set.c",
-    "../externals/icu/source/common/ucnv_u16.c",
-    "../externals/icu/source/common/ucnv_u32.c",
-    "../externals/icu/source/common/ucnv_u7.c",
-    "../externals/icu/source/common/ucnv_u8.c",
-    "../externals/icu/source/common/ucnvbocu.cpp",
-    "../externals/icu/source/common/ucnvdisp.c",
-    "../externals/icu/source/common/ucnvhz.c",
-    "../externals/icu/source/common/ucnvisci.c",
-    "../externals/icu/source/common/ucnvlat1.c",
-    "../externals/icu/source/common/ucnvmbcs.cpp",
-    "../externals/icu/source/common/ucnvscsu.c",
-    "../externals/icu/source/common/ucnvsel.cpp",
-    "../externals/icu/source/common/ucol_swp.cpp",
-    "../externals/icu/source/common/udata.cpp",
-    "../externals/icu/source/common/udatamem.c",
-    "../externals/icu/source/common/udataswp.c",
-    "../externals/icu/source/common/uenum.c",
-    "../externals/icu/source/common/uhash.c",
-    "../externals/icu/source/common/uhash_us.cpp",
-    "../externals/icu/source/common/uidna.cpp",
-    "../externals/icu/source/common/uinit.cpp",
-    "../externals/icu/source/common/uinvchar.c",
-    "../externals/icu/source/common/uiter.cpp",
-    "../externals/icu/source/common/ulist.c",
-    "../externals/icu/source/common/ulistformatter.cpp",
-    "../externals/icu/source/common/uloc.cpp",
-    "../externals/icu/source/common/uloc_keytype.cpp",
-    "../externals/icu/source/common/uloc_tag.c",
-    "../externals/icu/source/common/umapfile.c",
-    "../externals/icu/source/common/umath.c",
-    "../externals/icu/source/common/umutex.cpp",
-    "../externals/icu/source/common/unames.cpp",
-    "../externals/icu/source/common/unifiedcache.cpp",
-    "../externals/icu/source/common/unifilt.cpp",
-    "../externals/icu/source/common/unifunct.cpp",
-    "../externals/icu/source/common/uniset.cpp",
-    "../externals/icu/source/common/uniset_closure.cpp",
-    "../externals/icu/source/common/uniset_props.cpp",
-    "../externals/icu/source/common/unisetspan.cpp",
-    "../externals/icu/source/common/unistr.cpp",
-    "../externals/icu/source/common/unistr_case.cpp",
-    "../externals/icu/source/common/unistr_case_locale.cpp",
-    "../externals/icu/source/common/unistr_cnv.cpp",
-    "../externals/icu/source/common/unistr_props.cpp",
-    "../externals/icu/source/common/unistr_titlecase_brkiter.cpp",
-    "../externals/icu/source/common/unorm.cpp",
-    "../externals/icu/source/common/unormcmp.cpp",
-    "../externals/icu/source/common/uobject.cpp",
-    "../externals/icu/source/common/uprops.cpp",
-    "../externals/icu/source/common/ures_cnv.c",
-    "../externals/icu/source/common/uresbund.cpp",
-    "../externals/icu/source/common/uresdata.cpp",
-    "../externals/icu/source/common/uresource.cpp",
-    "../externals/icu/source/common/usc_impl.c",
-    "../externals/icu/source/common/uscript.c",
-    "../externals/icu/source/common/uscript_props.cpp",
-    "../externals/icu/source/common/uset.cpp",
-    "../externals/icu/source/common/uset_props.cpp",
-    "../externals/icu/source/common/usetiter.cpp",
-    "../externals/icu/source/common/ushape.cpp",
-    "../externals/icu/source/common/usprep.cpp",
-    "../externals/icu/source/common/ustack.cpp",
-    "../externals/icu/source/common/ustr_cnv.cpp",
-    "../externals/icu/source/common/ustr_titlecase_brkiter.cpp",
-    "../externals/icu/source/common/ustr_wcs.cpp",
-    "../externals/icu/source/common/ustrcase.cpp",
-    "../externals/icu/source/common/ustrcase_locale.cpp",
-    "../externals/icu/source/common/ustrenum.cpp",
-    "../externals/icu/source/common/ustrfmt.c",
-    "../externals/icu/source/common/ustring.cpp",
-    "../externals/icu/source/common/ustrtrns.cpp",
-    "../externals/icu/source/common/utext.cpp",
-    "../externals/icu/source/common/utf_impl.c",
-    "../externals/icu/source/common/util.cpp",
-    "../externals/icu/source/common/util_props.cpp",
-    "../externals/icu/source/common/utrace.c",
-    "../externals/icu/source/common/utrie.cpp",
-    "../externals/icu/source/common/utrie2.cpp",
-    "../externals/icu/source/common/utrie2_builder.cpp",
-    "../externals/icu/source/common/uts46.cpp",
-    "../externals/icu/source/common/utypes.c",
-    "../externals/icu/source/common/uvector.cpp",
-    "../externals/icu/source/common/uvectr32.cpp",
-    "../externals/icu/source/common/uvectr64.cpp",
-    "../externals/icu/source/common/wintz.c",
-  ]
-  sources += [ "../externals/icu/$current_os/icudtl_dat.S" ]
 }