From 3e184b4cfc5c1ce59d89eafe5961b4d31ead00a5 Mon Sep 17 00:00:00 2001
From: innerNULL <lyt697@outlook.com>
Date: Thu, 7 Jul 2022 11:42:28 +0000
Subject: [PATCH] dev: Integrates glog/gflags with FetchContent style.

---
 CMakeLists.txt | 21 +++++++++++++++++++++
 README.md      |  2 +-
 qmf/bpr.cpp    |  4 ++--
 qmf/wals.cpp   |  4 ++--
 4 files changed, 26 insertions(+), 5 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7624194..9b04a29 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -21,6 +21,7 @@ set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "bin/")
 set(CMAKE_FILES_DIRECTORY "build/")
 
 # includes
+include(FetchContent)
 include_directories(SYSTEM ${PROJECT_SOURCE_DIR})
 include_directories(SYSTEM ${PROJECT_SOURCE_DIR}/qmf/third-party/gtest-1.7.0/fused-src)
 
@@ -42,6 +43,26 @@ set(SOURCES
     ${PROJECT_SOURCE_DIR}/qmf/utils/Util.cpp
 )
 
+set(FETCHCONTENT_QUIET FALSE)
+
+FetchContent_Declare(
+  glog  
+  GIT_REPOSITORY https://github.com/google/glog.git 
+  GIT_TAG v0.4.0 
+  GIT_PROGRESS TRUE
+)
+FetchContent_Declare(glog)
+FetchContent_MakeAvailable(glog)
+
+FetchContent_Declare(
+  gflags  
+  GIT_REPOSITORY https://github.com/gflags/gflags.git 
+  GIT_TAG v2.2.2
+  GIT_PROGRESS TRUE
+)
+FetchContent_Declare(gflags)
+FetchContent_MakeAvailable(gflags)
+
 add_library(qmf STATIC ${SOURCES})
 target_link_libraries(qmf glog gflags lapack)
 
diff --git a/README.md b/README.md
index d8eb4d0..d4af47b 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@ QMF requires gcc 5.0+, as it uses the C++14 standard, and CMake version 2.8+. It
 
 To install libraries dependencies:
 ```
-sudo apt-get install libgoogle-glog-dev libgflags-dev liblapack-dev
+sudo apt-get install liblapack-dev
 ```
 
 To build the binaries:
diff --git a/qmf/bpr.cpp b/qmf/bpr.cpp
index ad03bd4..d418602 100644
--- a/qmf/bpr.cpp
+++ b/qmf/bpr.cpp
@@ -59,8 +59,8 @@ DEFINE_string(user_factors, "", "filename of user factors");
 DEFINE_string(item_factors, "", "filename of item factors");
 
 int main(int argc, char** argv) {
-  google::SetUsageMessage("bpr");
-  google::ParseCommandLineFlags(&argc, &argv, true);
+  gflags::SetUsageMessage("bpr");
+  gflags::ParseCommandLineFlags(&argc, &argv, true);
   google::InitGoogleLogging(argv[0]);
   // make glog to log to stderr
   FLAGS_logtostderr = 1;
diff --git a/qmf/wals.cpp b/qmf/wals.cpp
index 8ecbf51..4764569 100644
--- a/qmf/wals.cpp
+++ b/qmf/wals.cpp
@@ -49,8 +49,8 @@ DEFINE_string(user_factors, "", "filename of user factors");
 DEFINE_string(item_factors, "", "filename of item factors");
 
 int main(int argc, char** argv) {
-  google::SetUsageMessage("wals");
-  google::ParseCommandLineFlags(&argc, &argv, true);
+  gflags::SetUsageMessage("wals");
+  gflags::ParseCommandLineFlags(&argc, &argv, true);
   google::InitGoogleLogging(argv[0]);
   // make glog to log to stderr
   FLAGS_logtostderr = 1;