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ocaml/Makefile.build_config.in

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Introduce Makefile.build_config.in This moves the configure-generated parts of Makefile.common to a separate (generated) Makefile, allowing Makefile.common to be a normal Makefile. OCaml's build system Makefile's now include Makefile.build_config (which itself includes Makefile.config) but Makefile.config is still installed as before. This allows configure to generate variables which are specific to the build process and are not intended to be exported to the installation.
2020-04-17 05:53:49 -07:00
# @configure_input@
#**************************************************************************
#* *
#* OCaml *
#* *
#* David Allsopp, OCaml Labs, Cambridge. *
#* *
#* Copyright 2020 MetaStack Solutions Ltd. *
#* *
#* All rights reserved. This file is distributed under the terms of *
#* the GNU Lesser General Public License version 2.1, with the *
#* special exception on linking described in the file LICENSE. *
#* *
#**************************************************************************
# This Makefile contains configuration gleaned by configure but which should not
# be installed in Makefile.config. The file is designed to be included in
# OCaml's build system and so itself includes Makefile.config. It assumes that
# $(ROOTDIR) has been defined.
include $(ROOTDIR)/Makefile.config
INSTALL ?= @INSTALL@
Use autoconf AC_PROG_INSTALL results Instead of hand-written INSTALL_{DATA,PROG}. autoconf "does the right thing" to provide a command which works as expected. See https://www.gnu.org/software/autoconf/manual/autoconf-2.69/html_node/Particular-Programs.html#index-AC_005fPROG_005fINSTALL-269
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INSTALL_DATA ?= @INSTALL_DATA@
INSTALL_PROG ?= @INSTALL_PROGRAM@
Cease committing C dependendency information When building for the first time, the only requirement is that generated header files have been built (jumptbl.h, version.h and opnames.h). Detailed dependency information is only required when headers have been edited. COMPUTE_DEPS in Makefile.config controls whether C dependency information should be generated on a per-file basis. This variable is controlled by a new --disable-dependency-generation in configure which is enabled for Git checkouts and disabled for tarballs (i.e. releases). The Microsoft C compiler (cl) cannot generate dependencies in a consistent way which we can consume, so for a Git checkout configure searches for an additional C compiler in order to compute dependencies. This is obviously not required for a user-build. As a result, the MSVC port can now safely run make alldepend, since only OCaml dependency information is committed to the repo after this change. CI does not need to waste time testing the dependency information, because it only tests a single build. A single Travis job has been added which tests the build system code to generate the dependency information (and provides a single `make -j` run in CI, although Inria's CI also tests parallel building continuously).
2020-04-17 06:11:22 -07:00
# The command to generate C dependency information
DEP_CC=@DEP_CC@ -MM
COMPUTE_DEPS=@compute_deps@