From 6a704ab7bf69cd5d6970b3a7d3ae7798b26027c1 Mon Sep 17 00:00:00 2001
From: Paulo Neves <ptsneves@gmail.com>
Date: Thu, 28 Jul 2022 11:28:41 +0200
Subject: [PATCH] CMakeLists.txt Do not use private makefile $< target

$< is a private detail from the Makefile generated by CMakefile and
are not under control or to be used at the CMakeLists level. In 3.20
that private generation changed pre-requisite targets[1] and now logs
contain the path compiler_depend.ts instead of the actual file.

Upstream status: Pending [1]
[1] https://github.com/fluent/fluent-bit/issues/5492
---
 CMakeLists.txt              | 6 +-----
 lib/chunkio/CMakeLists.txt  | 7 +------
 lib/cmetrics/CMakeLists.txt | 7 +------
 3 files changed, 3 insertions(+), 17 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3dba5a8..d94b988 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -46,11 +46,7 @@ else()
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall")
 endif()
 
-if(NOT ${CMAKE_SYSTEM_NAME} MATCHES "Windows")
-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__FILENAME__='\"$(subst ${CMAKE_SOURCE_DIR}/,,$(abspath $<))\"'")
-else()
-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__FILENAME__=__FILE__")
-endif()
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__FILENAME__=__FILE__")
 
 if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "armv7l")
   set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -latomic")
diff --git a/lib/chunkio/CMakeLists.txt b/lib/chunkio/CMakeLists.txt
index bbe1f39..809ea93 100644
--- a/lib/chunkio/CMakeLists.txt
+++ b/lib/chunkio/CMakeLists.txt
@@ -14,12 +14,7 @@ else()
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall ")
 endif()
 
-# Set __FILENAME__
-if(NOT ${CMAKE_SYSTEM_NAME} MATCHES "Windows")
-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__FILENAME__='\"$(subst ${CMAKE_SOURCE_DIR}/,,$(abspath $<))\"'")
-else()
-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__FILENAME__=__FILE__")
-endif()
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__FILENAME__=__FILE__")
 
 include(cmake/macros.cmake)
 
diff --git a/lib/cmetrics/CMakeLists.txt b/lib/cmetrics/CMakeLists.txt
index 60e8774..e3d6149 100644
--- a/lib/cmetrics/CMakeLists.txt
+++ b/lib/cmetrics/CMakeLists.txt
@@ -34,12 +34,7 @@ set(CMT_VERSION_MINOR  3)
 set(CMT_VERSION_PATCH  5)
 set(CMT_VERSION_STR "${CMT_VERSION_MAJOR}.${CMT_VERSION_MINOR}.${CMT_VERSION_PATCH}")
 
-# Define __FILENAME__ consistently across Operating Systems
-if(NOT ${CMAKE_SYSTEM_NAME} MATCHES "Windows")
-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__FILENAME__='\"$(subst ${CMAKE_SOURCE_DIR}/,,$(abspath $<))\"'")
-else()
-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__FILENAME__=__FILE__")
-endif()
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__FILENAME__=__FILE__")
 
 # Configuration options
 option(CMT_DEV             "Enable development mode"                   No)