From a2d38c56790231c393daebdb810ba55836aae405 Mon Sep 17 00:00:00 2001
From: Gil <mcg@google.com>
Date: Tue, 17 Jul 2018 11:36:56 -0700
Subject: Implement a CMake build for FirebaseAuthInterop (#1532)

* Add a CMake build for FirebaseAuthInterop

* Avoid cluttering the symbol table

* Trigger Firestore-cmake checks on cmake script changes
---
 Firestore/CMakeLists.txt | 20 ++++++++++++++++++++
 scripts/if_changed.sh    |  2 +-
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/Firestore/CMakeLists.txt b/Firestore/CMakeLists.txt
index 21bff1f..fe7d8f4 100644
--- a/Firestore/CMakeLists.txt
+++ b/Firestore/CMakeLists.txt
@@ -144,6 +144,26 @@ podspec_framework(
   ${FIREBASE_SOURCE_DIR}/FirebaseCore.podspec
 )
 
+podspec_framework(
+  ${FIREBASE_SOURCE_DIR}/FirebaseAuthInterop.podspec
+)
+
+# FirebaseAuthInterop has no source files but CMake can't build frameworks that don't
+# have sources. Generate an inconsequential source file so that the library can
+# be linked.
+file(
+  WRITE ${CMAKE_CURRENT_BINARY_DIR}/FirebaseAuthInteropDummy.c
+  "// generated file for header-only CMake support.
+  __attribute__((unused))
+  static void FirebaseAuthInteropFakeSymbol() {}
+  "
+)
+target_sources(
+  FirebaseAuthInterop
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/FirebaseAuthInteropDummy.c
+)
+
+
 # Superbuild installed results
 include_directories(${FIREBASE_INSTALL_DIR}/include)
 
diff --git a/scripts/if_changed.sh b/scripts/if_changed.sh
index e0e2a18..9ba7b51 100755
--- a/scripts/if_changed.sh
+++ b/scripts/if_changed.sh
@@ -54,7 +54,7 @@ else
       ;;
 
     Firestore-cmake)
-      check_changes '^Firestore/(core|third_party)'
+      check_changes '^(Firestore/(core|third_party)|cmake)'
       ;;
 
     *)
-- 
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