From b3e7fa5e706e99cfa1369196bd504c0830ff78e7 Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Apr 25 2021 12:14:41 +0000
Subject: project: bootstrap and cfgdefs.sh: initial implementation.


---

diff --git a/config.project b/config.project
index 751bccb..821ea72 100644
--- a/config.project
+++ b/config.project
@@ -13,7 +13,7 @@ mb_disable_static=yes
 mb_disable_shared=yes
 
 # custom config step
-mb_use_custom_cfgdefs=no
+mb_use_custom_cfgdefs=yes
 mb_use_custom_cfginit=no
 mb_use_custom_cfgfini=no
 mb_use_custom_cfgtest=no
diff --git a/project/config/cfgdefs.sh b/project/config/cfgdefs.sh
new file mode 100644
index 0000000..8400b6a
--- /dev/null
+++ b/project/config/cfgdefs.sh
@@ -0,0 +1,88 @@
+# in projects where [ $mb_use_custom_cfgdefs = yes ],
+# cfgdefs.sh is invoked from within ./configure via
+# . $mb_project_dir/project/cfgdefs.sh
+
+# a successful return from cfgdefs.sh will be followed
+# by a second invocation of the config_copy() function,
+# reflecting any changes to common config variables
+# made by cfgdefs.sh.
+
+# finally, cfgdefs.sh may update the contents of the
+# config-time generated cfgdefs.mk.
+
+for arg ; do
+	case "$arg" in
+		*)
+			error_msg ${arg#}: "unsupported config argument."
+			exit 2
+	esac
+done
+
+
+cfgdefs_bootstrap()
+{
+	cfgdefs_bootstrap_done=${cfgdefs_bootstrap_done:-}
+
+	if [ _$cfgdefs_bootstrap_done = _yes ]; then
+		return 0
+	fi
+
+	cfgdefs_objs=
+
+	cfgdefs_utilsrc='make.c'
+
+	cfgdefs_sources="arch.c buf.c compat.c cond.c dir.c enum.c for.c hash.c job.c"
+	cfgdefs_sources="$cfgdefs_sources lst.c main.c make_malloc.c meta.c metachar.c parse.c"
+	cfgdefs_sources="$cfgdefs_sources str.c suff.c targ.c trace.c util.c var.c"
+
+	cfgdefs_cflags="-I${mb_source_dir}/src/internal"
+	cfgdefs_cflags="$cfgdefs_cflags -D_PATH_DEFSYSPATH=\"${mb_source_dir}/mk\""
+	cfgdefs_cflags="$cfgdefs_cflags -DHAVE_STRERROR -DHAVE_VSNPRINTF"
+	cfgdefs_cflags="$cfgdefs_cflags -DHAVE_SETPGID -DHAVE_SETRLIMIT -DHAVE_SETENV"
+
+	cfgdefs_make="$mb_pwd/bootstrap/make"
+
+	mkdir -p "$mb_pwd/bootstrap"
+
+	printf '\n\n'
+
+	for src in $cfgdefs_utilsrc; do
+		obj=${src%%.c}.o
+		cfgdefs_objs="$cfgdefs_objs $mb_pwd/bootstrap/${obj}"
+
+		set -x
+
+		"$mb_native_cc" $mb_native_cflags $cfgdefs_cflags \
+			-c "$mb_source_dir/src/${src}"             \
+			-o "$mb_pwd/bootstrap/${obj}"
+
+		set +x
+	done
+
+	for src in $cfgdefs_sources; do
+		obj=${src%%.c}.o
+		cfgdefs_objs="$cfgdefs_objs $mb_pwd/bootstrap/${obj}"
+
+		set -x
+
+		"$mb_native_cc" $mb_native_cflags $cfgdefs_cflags \
+			-c "$mb_source_dir/src/logic/${src}"       \
+			-o "$mb_pwd/bootstrap/${obj}"
+
+		set +x
+	done
+
+	"$mb_native_cc" $mb_native_cflags $cfgdefs_cflags \
+		$mb_native_ldflags $cfgdefs_objs           \
+		-o "$cfgdefs_make"
+
+	mb_make="$cfgdefs_make"
+
+	cfgdefs_bootstrap_done='yes'
+}
+
+# bootstrap
+cfgdefs_bootstrap
+
+# all done
+return 0