build system: remove the config/ directory

None of the files in this directory is used any more.

(cherry picked from commit 6bb155f)

.gitattributes

@@ -74,9 +74,6 @@ asmcomp/*/emit.mlp       typo.tab=may typo.long-line=may
 # The build-aux directory contains bundled files so do not check it
 build-aux                typo.prune
 
-/config/gnu              typo.prune
-/config/gnu/**           typo.prune
-
 /manual                  typo.prune
 /manual/**               typo.prune
 
@@ -149,15 +146,6 @@ build-aux/config.guess text eol=lf
 build-aux/config.sub text eol=lf
 build-aux/install text eol=lf
 build-aux/missing text eol=lf
-config/auto-aux/hasgot text eol=lf
-config/auto-aux/hasgot2 text eol=lf
-config/auto-aux/runtest text eol=lf
-config/auto-aux/searchpath text eol=lf
-config/auto-aux/solaris-ld text eol=lf
-config/auto-aux/tryassemble text eol=lf
-config/auto-aux/trycompile text eol=lf
-config/gnu/config.guess text eol=lf
-config/gnu/config.sub text eol=lf
 ocamldoc/remove_DEBUG text eol=lf
 ocamltest/getocamloptdefaultflags text eol=lf
 stdlib/Compflags text eol=lf
@@ -178,11 +166,7 @@ tools/markdown-add-pr-links.sh text eol=lf
 runtime/caml/m.h.in text eol=lf
 runtime/caml/s.h.in text eol=lf
 
-# These two are cat scripts, so may not actually require this
-config/auto-aux/sharpbang text eol=lf
-config/auto-aux/sharpbang2 text eol=lf
-
-# Similarly, these are all Perl scripts, so may not actually require this
+# These are all Perl scripts, so may not actually require this
 manual/tools/caml-tex text eol=lf
 manual/tools/format-intf text eol=lf
 manual/tools/htmlcut text eol=lf

HACKING.adoc

@@ -179,13 +179,13 @@ has excellent documentation.
   VERSION::               version string
   asmcomp/::              native-code compiler and linker
   boot/::                 bootstrap compiler
+  build-aux/:             autotools support scripts
   bytecomp/::             bytecode compiler and linker
   compilerlibs/::         the OCaml compiler as a library
-  config/::               configuration files
   configure::             configure script
+  configure.ac:           autoconf input file
   debugger/::             source-level replay debugger
   driver/::               driver code for the compilers
-  emacs/::                editing mode and debugger interface for GNU Emacs
   flexdll/::              git submodule -- see link:README.win32.adoc[]
   lex/::                  lexer generator
   man/::                  man pages

INSTALL.adoc

@@ -59,9 +59,10 @@ By default, build is 32-bit. For 64-bit build, please set environment variable `
 If something goes wrong during the automatic configuration, or if the generated
 files cause errors later on, then look at the template files:
 
-        config/Makefile-templ
-        config/m-templ.h
-        config/s-templ.h
+        Makefile.config.in
+        Makefile.common.in
+        runtime/caml/m.h.in
+        runtime/caml/s.h.in
 +
 for guidance on how to edit the generated files by hand.
 

Makefile.config.in

@@ -243,7 +243,7 @@ else
   MKEXE_BOOT=$(CC) $(OC_CFLAGS) $(OC_LDFLAGS) $(OUTPUTEXE)$(1) $(2)
 endif # ifeq "$(TOOLCHAIN)" "msvc"
 
-# The following variables were defined only in the config/Makefile.* files.
+# The following variables were defined only in the Windows-specific makefiles.
 # They were not defined by the configure script used on Unix systems,
 # so we also make sure to provide them only under Windows
 # User code should absolutely not rely on their presence because