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-rw-r--r--Makefile.am44
-rw-r--r--configure.ac13
-rw-r--r--src/cuirass/config.scm.in7
3 files changed, 50 insertions, 14 deletions
diff --git a/Makefile.am b/Makefile.am
index d4ef8a0..cde4f67 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -86,18 +86,60 @@ sql-check: src/schema.sql
EXTRA_DIST = \
.dir-locals.el \
bootstrap \
+ src/cuirass/config.scm.in \
tests/gnu-system.scm \
tests/guix-jobs.scm \
tests/hello-singleton.scm \
tests/hello-subset.scm \
$(TESTS)
-DISTCLEANFILES = src/cuirass/config.scm
+MOSTLYCLEANFILES = src/cuirass/config.scm
CLEANFILES = \
$(nodist_guilesite_DATA) \
$(dist_pkgmodule_DATA:%.scm=%.go) \
src/cuirass/config.go
+## ----------------- ##
+## Generated files. ##
+## ----------------- ##
+
+# 'AC_CONFIG_FILES' doesn't fully expand variables that depend on ${prefix}.
+# To use such variables in source files and scripts while following GNU Coding
+# Standards, let 'make' manage their replacement.
+
+# Use config.status to substitute the remainder where a single expansion is
+# sufficient. We use a funny notation here to avoid configure substitutions
+# in our text.
+do_subst = ( $(SED) \
+ -e "s,@configure_input[@],Generated from $$in. Do not edit by hand.,g" \
+ -e 's,@datadir[@],$(datadir),g' \
+ -e 's,@localstatedir[@],$(localstatedir),g' \
+ | $(SHELL) ./config.status --file=- )
+
+# Generic instructions to perform the substitution. Generated files shouldn't
+# contain unexpanded '@substitutions@', and should be made read-only, to
+# prevent them from being edited by mistake instead of the file the are
+# generated from.
+generate_file = \
+ $(AM_V_GEN)rm -f $@ $@-t; \
+ $(MKDIR_P) $(@D); \
+ in=$@.in && $(do_subst) <$(srcdir)/$$in >$@-t; \
+ if LC_ALL=C grep '@[a-zA-Z0-9_][a-zA-Z0-9_]*@' $@-t; then \
+ echo "$@ contains unexpanded substitution (see lines above)"; \
+ exit 1; \
+ fi; \
+ chmod a-w $@-t; mv -f $@-t $@
+
+# This file depends on Makefile so it is rebuilt if $(VERSION),
+# $(datadir) or other do_subst'ituted variables change.
+src/cuirass/config.scm: $(srcdir)/src/cuirass/config.scm.in Makefile
+ $(generate_file)
+
+# Guile modules require 'src/cuirass/config.scm' to exist before being
+# compiled.
+go_files = $(nodist_guilesite_DATA) $(dist_pkgmodule_DATA:%.scm=%.go)
+$(go_files): src/cuirass/config.scm
+
## -------------- ##
## Silent rules. ##
## -------------- ##
diff --git a/configure.ac b/configure.ac
index fb82829..ce246fa 100644
--- a/configure.ac
+++ b/configure.ac
@@ -8,14 +8,8 @@ AM_INIT_AUTOMAKE([foreign subdir-objects -Wall])
AM_SILENT_RULES([yes]) # enables silent rules by default
AC_CANONICAL_HOST
-
-# Prepare a version of installation directories that does not contain
-# references to shell variables.
-expanded_prefix="`eval echo $prefix | sed -e "s|NONE|/usr/local|g"`"
-AC_SUBST([expanded_datadir],
- [`eval echo $datarootdir | sed -e "s|NONE|$expanded_prefix|g"`])
-AC_SUBST([expanded_localstatedir],
- [`eval echo $localstatedir | sed -e "s|NONE|$expanded_prefix|g"`])
+AC_PROG_MKDIR_P
+AC_PROG_SED
PKG_CHECK_MODULES([GUILE], [guile-2.0 >= 2.0.7])
AC_PATH_PROG([GUILE], [guile])
@@ -27,8 +21,7 @@ GUILE_MODULE_REQUIRED([guix])
GUILE_MODULE_REQUIRED([json])
GUILE_MODULE_REQUIRED([sqlite3])
-AC_CONFIG_FILES([Makefile
- src/cuirass/config.scm])
+AC_CONFIG_FILES([Makefile])
AC_CONFIG_FILES([bin/cuirass], [chmod +x bin/cuirass])
AC_CONFIG_FILES([bin/evaluate], [chmod +x bin/evaluate])
AC_CONFIG_FILES([pre-inst-env:build-aux/pre-inst-env.in],
diff --git a/src/cuirass/config.scm.in b/src/cuirass/config.scm.in
index b8f4ae3..9ae99ab 100644
--- a/src/cuirass/config.scm.in
+++ b/src/cuirass/config.scm.in
@@ -1,4 +1,5 @@
-;;; config.scm -- variables defined at configure time
+;;;; config.scm -- constants defined by the build system.
+;;; @configure_input@
;;; Copyright © 2016 Mathieu Lirzin <mthl@gnu.org>
;;;
;;; This file is part of Cuirass.
@@ -48,8 +49,8 @@
(define-public %datadir
;; Define to DATADIR without reference to '${prefix}'.
- "@expanded_datadir@")
+ "@datadir@")
(define-public %localstatedir
;; Define to LOCALSTATEDIR without reference to '${prefix}'.
- "@expanded_localstatedir@")
+ "@localstatedir@")