From 5b9ccf6c1ad775352b6ae9e704c8f57d5546c4b7 Mon Sep 17 00:00:00 2001
From: Alexey Rybalchenko <alexryba@gmail.com>
Date: Tue, 27 Aug 2019 11:35:00 +0200
Subject: [PATCH] Support for external fmt

---
 CMakeLists.txt                         | 15 +++++++++++++++
 examples/common/mcstack/CMakeLists.txt |  1 +
 2 files changed, 16 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 548f003009..38ff241c98 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -163,6 +163,18 @@ endif()
 # FairRoot only supports ROOT6, so check which version is available
 find_package2(PUBLIC ROOT  VERSION 6.10.00  REQUIRED)
 find_package2(PUBLIC FairLogger  VERSION 1.2.0 REQUIRED)
+
+foreach(dep IN LISTS FairLogger_PACKAGE_DEPENDENCIES)
+if(NOT dep STREQUAL "Boost")
+  find_package2(PUBLIC ${dep} REQUIRED VERSION ${FairLogger_${dep}_VERSION})
+  set(PROJECT_${dep}_VERSION ${FairLogger_${dep}_VERSION})
+  if(dep STREQUAL "fmt") # handling of external fmt installation
+    get_target_property(FMT_INCLUDE_DIR fmt::fmt INTERFACE_INCLUDE_DIRECTORIES)
+    set(FairLogger_INCDIR ${FairLogger_INCDIR} ${FMT_INCLUDE_DIR})
+  endif()
+endif()
+endforeach()
+
 find_package2(PUBLIC Pythia6)
 find_package2(PUBLIC Pythia8)
 find_package2(PUBLIC Protobuf)
@@ -515,6 +527,9 @@ if(PROJECT_PACKAGE_DEPENDENCIES)
       get_filename_component(prefix ${IWYU_BINARY}/.. ABSOLUTE)
     elseif(${dep} STREQUAL yaml-cpp)
       get_filename_component(prefix ${YAML_CPP_INCLUDE_DIR}/.. ABSOLUTE)
+    elseif(${dep} STREQUAL fmt)
+      get_target_property(fmt_include fmt::fmt INTERFACE_INCLUDE_DIRECTORIES)
+      get_filename_component(prefix ${fmt_include}/.. ABSOLUTE)
     endif()
 
     message(STATUS "  ${BWhite}${dep_padded}${CR}${version_padded}${prefix}")
diff --git a/examples/common/mcstack/CMakeLists.txt b/examples/common/mcstack/CMakeLists.txt
index 9d37984128..7f9e3cc5f5 100644
--- a/examples/common/mcstack/CMakeLists.txt
+++ b/examples/common/mcstack/CMakeLists.txt
@@ -12,6 +12,7 @@
 Set(INCLUDE_DIRECTORIES
   ${BASE_INCLUDE_DIRECTORIES}
   ${CMAKE_SOURCE_DIR}/examples/common/mcstack
+  ${FairLogger_INCDIR}
 )
 
 Include_Directories(${INCLUDE_DIRECTORIES})