Rework the creation of build.sh so it's not a template.

* build.sh: Rename from build.template.  Get the list of objects
from the Makefile.  Move configure-replaced variables ...
* build.cfg.in: to this new .in file.
* configure.ac: Remove special handling of build.sh.in and add
build.cfg as a generated file.
* Makefile.am (EXTRA_DIST): Remove build.sh.in and add build.sh
and build.cfg.in for build.sh.in.
* maintMakefile: Remove handling for build.template.  Treat
build.sh as a source file, not a generated file.
* .gitignore: Ignore generated build.cfg file.

1 files changed, 149 insertions, 0 deletions

diff --git a/build.sh b/build.sh
new file mode 100755
index 00000000..7d288914
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,149 @@
+#!/bin/sh
+# Shell script to build GNU Make in the absence of any 'make' program.
+
+# Copyright (C) 1993-2019 Free Software Foundation, Inc.
+# This file is part of GNU Make.
+#
+# GNU Make is free software; you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free Software
+# Foundation; either version 3 of the License, or (at your option) any later
+# version.
+#
+# GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+# details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# Get configure-generated values
+. ./build.cfg
+
+: ${OUTDIR:=.}
+OUTLIB="$OUTDIR/lib"
+
+# Directory to find libraries in for '-lXXX'.
+libdir=$exec_prefix/lib
+# Directory to search by default for included makefiles.
+includedir=$prefix/include
+
+localedir=$prefix/share/locale
+
+defines="-DLOCALEDIR=\"$localedir\" -DLIBDIR=\"$libdir\" -DINCLUDEDIR=\"$includedir\""
+
+# Look up a make variable value.
+# It can handle simple recursion where variables are separate words.
+# Print the value to stdout.
+get_mk_var ()
+{
+  file=$1
+  var=$2
+
+  val=
+  v=$(sed -e :a -e '/\\$/N; s/\\\n//; ta' "$file" | sed -n "s=^ *$var *\= *==p")
+  for w in $v; do
+    case $w in
+      (\$[\(\{]*[\)\}]) w=${w#\$[\(\{]}; w=$(get_mk_var "$file" "${w%[\)\}]}") ;;
+    esac
+    val="${val:+$val }$w"
+  done
+
+  printf '%s\n' "$val"
+}
+
+# Compile source files.  Object files are put into $objs.
+compile ()
+{
+  objs=
+  for ofile in "$@"; do
+    file="${ofile%.$OBJEXT}.c"
+    echo "compiling $file..."
+    of="$OUTDIR/$ofile"
+    mkdir -p "${of%/*}"
+    $CC $cflags $CPPFLAGS $CFLAGS -c -o "$of" "$top_srcdir/$file"
+    objs="${objs:+$objs }$of"
+  done
+}
+
+# Use config.status to convert a .in file.  Output file is put into $out.
+# $out will be empty if no conversion was needed.
+convert ()
+{
+  out=
+  base=$1
+  var="GENERATE_$(echo $base | tr 'a-z./+' A-Z__X)"
+
+  # Is this file disabled?
+  grep "${var}_FALSE\"]=\"\"" config.status >/dev/null && return
+
+  # Not disabled, so create it
+  in="$top_srcdir/lib/$(echo ${base%.*}.in.${base##*.} | tr / _)"
+  out="$OUTLIB/$base"
+  mkdir -p "${out%/*}"
+
+  # First perform the normal replacements, using config.status
+  sed -e 's|@GUARD_PREFIX@|GL|g' \
+      -e 's/@GNULIB_UNISTD_H_GETOPT@/0/g' \
+      "$in" > "${out}_"
+  ./config.status --file "${out}__:${out}_"
+  int="${out}__"
+
+  # Then see if there any files we need to include.  Unfortunately there's no
+  # algorithmic conversion so we just have to hard-code it.
+  incls=$(sed -n 's/.*definitions* of \(_[^ $]*\).*/\1/p' "$in")
+
+  for inc in $incls; do
+    case $inc in
+      (_GL_FUNCDECL_RPL) fn=$(get_mk_var lib/Makefile CXXDEFS_H) ;;
+      (_GL_ARG_NONNULL)  fn=$(get_mk_var lib/Makefile ARG_NONNULL_H) ;;
+      (_GL_WARN_ON_USE)  fn=$(get_mk_var lib/Makefile WARN_ON_USE_H) ;;
+      (_Noreturn)        fn=$(get_mk_var lib/Makefile _NORETURN_H) ;;
+      (*) echo "Unknown file replacement: $inc"; exit 1 ;;
+    esac
+
+    fn="$top_srcdir/lib/${fn##*/}"
+    [ -f "$fn" ] || { echo "Missing file: $fn"; exit 1; }
+
+    sed "/definitions* of $inc/r $fn" "$int" > "${int}_"
+    int=${int}_
+  done
+
+  # Done!
+  mv "$int" "$out"
+}
+
+# Get source files provided from gnulib and convert to object files
+LIBOBJS=
+for lo in $( (get_mk_var lib/Makefile libgnu_a_OBJECTS; get_mk_var lib/Makefile libgnu_a_LIBADD) | sed "s=\$[\(\{]OBJEXT[\)\}]=$OBJEXT=g"); do
+  LIBOBJS="${LIBOBJS:+$LIBOBJS }lib/$lo"
+done
+
+# Get object files from the Makefile
+OBJS=$(get_mk_var Makefile make_OBJECTS | sed "s=\$[\(\{]OBJEXT[\)\}]=$OBJEXT=g")
+
+# Exit as soon as any command fails.
+set -e
+
+# Generate gnulib header files that would normally be created by make
+for b in $(get_mk_var lib/Makefile BUILT_SOURCES); do
+    convert $b
+done
+
+# Build the gnulib library
+cflags="$DEFS -I$OUTLIB -Ilib -I$top_srcdir/lib -I$OUTDIR/src -Isrc -I$top_srcdir/src"
+compile $LIBOBJS
+
+echo "creating libgnu.a..."
+$AR $ARFLAGS "$OUTLIB"/libgnu.a $objs
+
+# Compile the source files into those objects.
+cflags="$DEFS $defines -I$OUTDIR/src -Isrc -I$top_srcdir/src -I$OUTLIB -Ilib -I$top_srcdir/lib"
+compile $OBJS
+
+# Link all the objects together.
+echo "linking make..."
+$CC $CFLAGS $LDFLAGS -L"$OUTLIB" $objs -lgnu $LOADLIBES -o "$OUTDIR/makenew$EXEEXT"
+mv -f "$OUTDIR/makenew$EXEEXT" "$OUTDIR/make$EXEEXT"
+
+echo done.