[etc, config] Mark makefiles as deprecated and remove leftover files

Author: ferdymercury

README/ReleaseNotes/v642/index.md

@@ -47,6 +47,7 @@ The following people have contributed to this new version:
 * The `TSSLSocket` class is now removed following deprecation in ROOT 6.40.
 * The bindings to the R programming language that are enabled with the `r=ON` or `tmva-rmva=ON` build options (`TRInterface`, RMVA, and friends) are removed, following deprecation in ROOT 6.40. Their maintenance is no longer justified, given the broader adoption of the scientific Python ecosystem. Users who still rely on R from C++ are encouraged to call R directly via https://cran.r-project.org/package=RInside, which is what the ROOT bindings were using internally.
 * Several enums that are redundant with `ROOT::ESTLType` are deprecated and will be removed in ROOT 6.44: `TClassEdit::ESTLType`, `TDictionary::ESTLType`, `TStreamerElement::ESTLType`. Please use `ROOT::ESTLType` instead.
+* The inclusion by external projects of Makefile templates contained within ROOT is deprecated in 6.42, a warning will be raised if you use them. These files will be removed in ROOT 7.
 
 ## Python Interface
 

cmake/modules/RootConfiguration.cmake

@@ -573,8 +573,8 @@ configure_file(${CMAKE_SOURCE_DIR}/config/rootrc.in ${CMAKE_BINARY_DIR}/etc/syst
 # file used in TROOT.cxx, not need in include/ dir and not need to install
 configure_file(${CMAKE_SOURCE_DIR}/config/RConfigOptions.in ginclude/RConfigOptions.h NEWLINE_STYLE UNIX)
 
-configure_file(${CMAKE_SOURCE_DIR}/config/Makefile-comp.in config/Makefile.comp NEWLINE_STYLE UNIX)
-configure_file(${CMAKE_SOURCE_DIR}/config/Makefile.in config/Makefile.config NEWLINE_STYLE UNIX)
+configure_file(${CMAKE_SOURCE_DIR}/config/Makefile-comp.in config/Makefile.comp NEWLINE_STYLE UNIX) # Will be removed in future release
+configure_file(${CMAKE_SOURCE_DIR}/config/Makefile.in config/Makefile.config NEWLINE_STYLE UNIX) # Will be removed in future release
 configure_file(${CMAKE_SOURCE_DIR}/config/mimes.unix.in ${CMAKE_BINARY_DIR}/etc/root.mimes NEWLINE_STYLE UNIX)
 # We need to have class.rules during configuration time to avoid silent error during generation of dictionary:
 # Error in <TClass::ReadRules()>: Cannot find rules

config/Makefile-comp.in

@@ -9,3 +9,5 @@ CXX   = @altcxx@
 F77   = @altf77@
 LD    = @altld@
 GCCTOOLCHAIN = @gcctoolchain@
+
+$(warning The use of Makefiles is deprecated since ROOT 6.42 and will be removed in ROOT 7.)

config/Makefile.in

@@ -293,3 +293,5 @@ RLIBS          := @rlibs@
 RFLAGS         := @rflags@
 
 ROOTDRPMREL    := 1
+
+$(warning The use of Makefiles is deprecated since ROOT 6.42 and will be removed in ROOT 7.)

core/textinput/src/textinput/Makefile

@@ -432,3 +432,5 @@ ifneq ($(findstring g++, $(CXX)),)
 GCC_MAJOR := $(shell $(CXX) -dumpversion 2>&1 | cut -d'.' -f1)
 GCC_MINOR := $(shell $(CXX) -dumpversion 2>&1 | cut -d'.' -f2)
 endif
+
+$(warning The use of Makefiles is deprecated since ROOT 6.42 and will be removed in ROOT 7.)

etc/Makefile.arch

@@ -323,14 +323,6 @@ ifeq ($(HAS_PYTHON),yes)
          export PYTHONPATH := $(ROOTSYS)/lib:$(PYTHONPATH)
        endif
    endif
-   ifeq ($(PLATFORM),macosx)
-      PYTHONLIB:=$(shell grep ^PYTHONLIB $(ROOTSYS)/config/Makefile.config | sed -e 's,^.*\:=,,'  -e 's,^ *-L,,' | grep -v -e '^ -l' -e '^ *$$' )
-      PYTHONFWK:=$(dir $(PYTHONLIB))
-      ifneq ($(PYTHONFWK),)
-         export PATH:=$(PYTHONFWK)/bin:$(PATH)
-         export DYLD_LIBRARY_PATH:=$(PYTHONFWK):$(DYLD_LIBRARY_PATH)
-      endif
-   endif
 endif
 
 ifeq ($(PLATFORM),win32)
@@ -345,18 +337,6 @@ endif
 # Avoid common typo
 ROOTLOC=$(ROOT_LOC)
 
-include $(ROOT_LOC)/config/Makefile.comp
-
-ifeq ($(ROOT_SRCDIR),)
-export ROOT_SRCDIR := $(shell grep "ROOT_SRCDIR    :=" $(ROOT_LOC)/config/Makefile.config | sed 's/^ROOT_SRCDIR    := \$$(call realpath, \([^)]*\).*$$/\1/')
-ifeq ($(PLATFORM),win32)
-  export ROOT_SRCDIR    := $(shell cygpath -m -- $(ROOT_SRCDIR))
-  export ROOT_SRCDIRDEP := $(shell cygpath -u -- $(ROOT_SRCDIR))
-else
-  export ROOT_SRCDIRDEP := $(ROOT_SRCDIR)
-endif
-endif
-
 ifeq ($(PLATFORM),win32)
 
 # Windows with the VC++ compiler