From d22e5e02a2d3670a79cf09bed81613ca90738163 Mon Sep 17 00:00:00 2001
From: Don <don.j.olmstead@gmail.com>
Date: Fri, 16 Mar 2018 12:49:13 -0700
Subject: cmake: add support for brotli

Currently CMake cannot detect Brotli support. This adds detection of the
libraries and associated header files. It also adds this to the
generated config.

Closes #2392
---
 CMake/FindBrotli.cmake  | 20 ++++++++++++++++++++
 CMakeLists.txt          | 12 ++++++++++++
 lib/curl_config.h.cmake |  3 +++
 3 files changed, 35 insertions(+)
 create mode 100644 CMake/FindBrotli.cmake

diff --git a/CMake/FindBrotli.cmake b/CMake/FindBrotli.cmake
new file mode 100644
index 000000000..351b8f757
--- /dev/null
+++ b/CMake/FindBrotli.cmake
@@ -0,0 +1,20 @@
+include(FindPackageHandleStandardArgs)
+
+find_path(BROTLI_INCLUDE_DIR "brotli/decode.h")
+
+find_library(BROTLICOMMON_LIBRARY NAMES brotlicommon)
+find_library(BROTLIDEC_LIBRARY NAMES brotlidec)
+
+find_package_handle_standard_args(BROTLI
+    FOUND_VAR
+      BROTLI_FOUND
+    REQUIRED_VARS
+      BROTLIDEC_LIBRARY
+      BROTLICOMMON_LIBRARY
+      BROTLI_INCLUDE_DIR
+    FAIL_MESSAGE
+      "Could NOT find BROTLI"
+)
+
+set(BROTLI_INCLUDE_DIRS ${BROTLI_INCLUDE_DIR})
+set(BROTLI_LIBRARIES ${BROTLICOMMON_LIBRARY} ${BROTLIDEC_LIBRARY})
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 490cc19ef..3232e9a49 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -521,6 +521,18 @@ if(CURL_ZLIB)
   endif()
 endif()
 
+option(CURL_BROTLI "Set to ON to enable building curl with brotli support." OFF)
+set(HAVE_BROTLI OFF)
+if(CURL_BROTLI)
+  find_package(BROTLI QUIET)
+  if(BROTLI_FOUND)
+    set(HAVE_BROTLI ON)
+    list(APPEND CURL_LIBS ${BROTLI_LIBRARIES})
+    include_directories(${BROTLI_INCLUDE_DIRS})
+    list(APPEND CMAKE_REQUIRED_INCLUDES ${BROTLI_INCLUDE_DIRS})
+  endif()
+endif()
+
 #libSSH2
 option(CMAKE_USE_LIBSSH2 "Use libSSH2" ON)
 mark_as_advanced(CMAKE_USE_LIBSSH2)
diff --git a/lib/curl_config.h.cmake b/lib/curl_config.h.cmake
index e640cc656..4b12083f2 100644
--- a/lib/curl_config.h.cmake
+++ b/lib/curl_config.h.cmake
@@ -398,6 +398,9 @@
 /* if zlib is available */
 #cmakedefine HAVE_LIBZ 1
 
+/* if brotli is available */
+#cmakedefine HAVE_BROTLI 1
+
 /* if your compiler supports LL */
 #cmakedefine HAVE_LL 1
 
-- 
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