From cfa5c56f233231802574f33a802c0e5f1710b1d4 Mon Sep 17 00:00:00 2001
From: irengrig <ichern@google.com>
Date: Mon, 20 Aug 2018 21:22:45 +0200
Subject: [PATCH] Add build libgd example, add it to tests (#42)

Unfortunately, many additional variables needed to make CMake find libraries.
---
 WORKSPACE                    | 20 ++++++++++
 examples/BUILD               |  1 +
 examples/cmake/BUILD         | 73 +++++++++++++++++++++++++++++++++---
 examples/cmake/test_libgd.sh |  3 ++
 4 files changed, 92 insertions(+), 5 deletions(-)
 create mode 100755 examples/cmake/test_libgd.sh

diff --git a/WORKSPACE b/WORKSPACE
index 44a44491..d2c17188 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -70,3 +70,23 @@ http_archive(
 load("@gmaven_rules//:gmaven.bzl", "gmaven_rules")
 
 gmaven_rules()
+
+new_http_archive(
+    name = "freetype",
+    build_file_content = all_content,
+    sha256 = "e6ffba3c8cef93f557d1f767d7bc3dee860ac7a3aaff588a521e081bc36f4c8a",
+    strip_prefix = "freetype-2.9",
+    urls = [
+        "https://download.savannah.gnu.org/releases/freetype/freetype-2.9.tar.bz2",
+    ],
+)
+
+new_http_archive(
+    name = "libgd",
+    build_file_content = all_content,
+    sha256 = "8c302ccbf467faec732f0741a859eef4ecae22fea2d2ab87467be940842bde51",
+    strip_prefix = "libgd-2.2.5",
+    urls = [
+        "https://github.com/libgd/libgd/releases/download/gd-2.2.5/libgd-2.2.5.tar.xz",
+    ],
+)
diff --git a/examples/BUILD b/examples/BUILD
index 088142b2..7a8c67fc 100644
--- a/examples/BUILD
+++ b/examples/BUILD
@@ -1,6 +1,7 @@
 test_suite(
     name = "tests",
     tests = [
+        "//examples/cmake:test_libgd",
         "//examples/cmake:test_libpng",
         "//examples/cmake:test_zlib",
     ],
diff --git a/examples/cmake/BUILD b/examples/cmake/BUILD
index 74714a1a..5c67f23b 100644
--- a/examples/cmake/BUILD
+++ b/examples/cmake/BUILD
@@ -7,11 +7,13 @@ cmake_external(
 
 cmake_external(
     name = "libpng",
+    cache_entries = {
+        "ZLIB_ROOT": "$EXT_BUILD_DEPS/libz",
+    },
     lib_source = "@libpng//:all",
     out_include_dir = "include/libpng16",
     static_libraries = ["libpng16.a"],
     deps = [":libz"],
-    postfix_script = "echo \"POST\""
 )
 
 cc_binary(
@@ -33,13 +35,74 @@ sh_test(
     name = "test_zlib",
     srcs = ["test_zlib.sh"],
     data = [":zlib_usage_example"],
-    visibility = ["//:__pkg__"]
+    visibility = ["//:__pkg__"],
 )
 
 sh_test(
     name = "test_libpng",
     srcs = ["test_libpng.sh"],
-    data = [":libpng_usage_example", "bazel-icon-transparent.png",],
     args = ["$(location bazel-icon-transparent.png) out.png"],
-    visibility = ["//:__pkg__"]
-)
\ No newline at end of file
+    data = [
+        "bazel-icon-transparent.png",
+        ":libpng_usage_example",
+    ],
+    visibility = ["//:__pkg__"],
+)
+
+cmake_external(
+    name = "freetype",
+    cache_entries = {
+        "ZLIB_ROOT": "$EXT_BUILD_DEPS/libz",
+        "PNG_LIBRARY": "$EXT_BUILD_DEPS/libpng/lib/libpng16.a",
+        "PNG_PNG_INCLUDE_DIR": "$EXT_BUILD_DEPS/libpng/include",
+    },
+    lib_source = "@freetype//:all",
+    out_include_dir = "include/freetype2",
+    static_libraries = ["libfreetype.a"],
+    deps = [
+        ":libpng",
+        ":libz",
+    ],
+)
+
+cmake_external(
+    name = "libgd",
+    cache_entries = {
+        "BUILD_SHARED_LIBS": "OFF",
+        "BUILD_STATIC_LIBS": "ON",
+        "ENABLE_PNG": "1",
+        "ENABLE_FREETYPE": "1",
+        "ZLIB_ROOT": "$EXT_BUILD_DEPS/libz",
+        "PNG_LIBRARY": "$EXT_BUILD_DEPS/libpng/lib/libpng16.a",
+        "PNG_PNG_INCLUDE_DIR": "$EXT_BUILD_DEPS/libpng/include",
+        "FREETYPE_LIBRARY": "$EXT_BUILD_DEPS/freetype/lib/libfreetype.a",
+        "FREETYPE_INCLUDE_DIRS": "$EXT_BUILD_DEPS/freetype/include/freetype2",
+    },
+    defines = ["HAVE_LIBPNG"],
+    lib_source = "@libgd//:all",
+    deps = [
+        ":freetype",
+        ":libpng",
+        ":libz",
+    ],
+)
+
+cc_binary(
+    name = "libgd_with_png_example",
+    srcs = ["arc.c"],
+    deps = [
+        ":freetype",
+        ":libgd",
+        ":libpng",
+        ":libz",
+    ],
+)
+
+sh_test(
+    name = "test_libgd",
+    srcs = ["test_libgd.sh"],
+    data = [
+        ":libgd_with_png_example",
+    ],
+    visibility = ["//:__pkg__"],
+)
diff --git a/examples/cmake/test_libgd.sh b/examples/cmake/test_libgd.sh
new file mode 100755
index 00000000..62d8f653
--- /dev/null
+++ b/examples/cmake/test_libgd.sh
@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+${TEST_SRCDIR}/rules_foreign_cc/examples/cmake/libgd_with_png_example $@
\ No newline at end of file