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#!/bin/sh
# a poor man's universal driver (but stay tuned...)

error_msg()
{
	echo $@ >&2
}

mb_cc=
mb_ar=
mb_source_dir=
mb_project_dir=
mb_sysroot=
version_header=
version_macro=

# one: args
for arg ; do
	case "$arg" in
		--help)	usage
			;;
		--cc=*)
			mb_cc=${arg#*=}
			;;
		--ar=*)
			mb_ar=${arg#*=}
			;;
		--source-dir=*)
			mb_source_dir=${arg#*=}
			;;
		--project-dir=*)
			mb_project_dir=${arg#*=}
			;;
		--sysroot=*)
			mb_sysroot=${arg#*=}
			;;
		--version-header=*)
			version_header=${arg#*=}
			;;
		--version-macro=*)
			version_macro='-D'${arg#*=}'=\\\"unknown\\\"'
			;;
		*)
			error_msg ${arg#}: "unsupported config argument."
			exit 2
			;;
	esac
done

if [ -z "$mb_cc" ] || [ -z "$mb_ar" ]           \
		   || [ -z "$mb_source_dir" ]   \
		   || [ -z "$mb_project_dir" ]; then
	usage
fi

# two: clean
make -s clean || exit 1

# three: init
echo '@echo on'
echo '@dir . > nul'
echo
echo
echo 'REM override variables either here or from the shell'
echo 'set source_dir=%source_dir%'
echo 'set sysroot=%sysroot%'
echo
echo

# four: build tree
cmd_abort_on_error='@if %errorlevel% neq 0 exit /b %errorlevel%'
sysroot_include_arg='-I%sysroot%/include'

dirs=`make dirs.tag tree.tag                    \
	 | grep -v 'make\[1\]:'                 \
	 | grep -v 'touch dirs.tag'             \
	 | grep -v 'touch tree.tag'             \
	 | sed                                  \
		-e 's/mkdir -p//g'              \
		-e 's@/@\\\\@g'`

for d in build $dirs; do
	printf 'if not exist %-20smkdir %s\n' "$d" "$d"
done

# version.tag
make version.tag > /dev/null

echo
echo "type nul > build/$version_header"
echo
echo "$cmd_abort_on_error"
echo

echo
echo "$cmd_abort_on_error"
echo

# five: compile assembly sources
make shared-objs-asm static-objs-asm                            \
	 | grep -v 'make\[1\]:'                                 \
	 | grep -v "$mb_project_dir/sysinfo/host"               \
	 | grep -v 'touch dirs.tag'                             \
	 | grep -v 'touch host.tag'                             \
	 | grep -v 'touch app.tag'                              \
	 | sed                                                  \
		-e 's@'"$mb_cc -c "'@ml64 /nologo @'            \
		-e 's@ '"$mb_source_dir"'@ /c %source_dir%@'    \
		-e 's@-o @/Fo @g'                               \
		-e 's@\.s@\.asm@g'                              \
		-e 's,$,\n\n'"$cmd_abort_on_error"'\n,g'

# six: compile C sources
make shared-objs static-objs app-objs                           \
	 | grep -v 'make\[1\]:'                                 \
	 | grep -v "$mb_project_dir/sysinfo/host"               \
	 | grep -v 'touch dirs.tag'                             \
	 | grep -v 'touch host.tag'                             \
	 | grep -v 'touch version.tag'                          \
	 | grep -v 'touch app.tag'                              \
	 | sed                                                  \
		-e 's@'"$mb_cc -c "'@cl /nologo -c @'           \
		-e 's@ '"$mb_source_dir"'@ %source_dir%@'       \
		-e 's@-I'"$mb_source_dir"'@-I%source_dir%@g'    \
		-e 's@-ffreestanding@/X /GS-@g'                 \
		-e 's@-o @/Fo:@g'                               \
		-e 's@-std=c99 @@g'                             \
		-e 's@-fPIC@@g'                                 \
		-e 's@-fpic@@g'                                 \
		-e 's@-g @/Zi @g'                               \
		-e 's@-g0 @/Zi @g'                              \
		-e 's@-g1 @/Zi @g'                              \
		-e 's@-g2 @/Zi @g'                              \
		-e 's@-g3 @/Zi @g'                              \
		-e 's@-O @/O2 @g'                               \
		-e 's@-Os @/O1 @g'                              \
		-e 's@-O0 @/Od @g'                              \
		-e 's@-O1 @/O2 @g'                              \
		-e 's@-O2 @/O2 @g'                              \
		-e 's@-O3 @/O2 @g'                              \
		-e 's@-Wall @/Wall @g'                          \
		-e 's@-Werror @/WX @g'                          \
		-e 's@-Wextra @@g'                              \
		-e 's@-Wundef @/Wall @g'                        \
		-e 's@-Wno-missing-field-initializers @ @g'     \
		-e 's@-Wno-unused-parameter @/wd4100 @g'        \
		-e 's@'"$mb_sysroot "'@ @'                      \
		-e 's,$, '"$version_macro"' -I%sysroot%/include\n\n'"$cmd_abort_on_error"'\n,g'

echo
echo '@echo.'
echo '@echo clbuild: successfully built: shared-objs static-objs app-objs.'
echo '@echo.'
echo

# seven: create static archive
make static                                             \
	 | grep -v 'make\[1\]:'                         \
	 | grep -v "rm -f "                             \
	 | sed                                          \
		-e 's@'"$mb_ar"' rcs @lib /out:@'       \
		-e 's,$, /nologo\n,g'

echo
echo "$cmd_abort_on_error"
echo

echo
echo '@echo.'
echo '@echo clbuild: successfully created: static archive.'
echo '@echo.'
echo

# eight: link shared library
make LDFLAGS_IMPLIB= LDFLAGS_SONAME= shared-lib                 \
	 | grep -v 'make\[1\]:'                                 \
	 | sed                                                  \
		-e 's@'"$mb_cc"' -shared @link /dll /nologo @'  \
		-e 's@-o @/out:@g'                              \
		-e 's@ -L@ /libpath:@g'                         \
		-e 's,-static -l\([^ ]\+\), %sysroot%/lib/lib\1.a,g' \
		-e 's, -l\([^ ]\+\), %sysroot%/lib/lib\1.lib,g' \
		-e 's@-nostdlib @/nodefaultlib @g'              \
		-e 's@-Wl,--subsystem=@/subsystem:@g'           \
		-e 's@-Wl,--entry -Wl,'"''"'@/entry:@g'         \
		-e 's@-Wl,--entry -Wl,@/entry:@g'               \
		-e 's@-Wl,--no-undefined@@g'                    \
		-e 's@-Wl,--exclude-all-symbols@@g'             \
		-e 's@'"$mb_sysroot "'@ @'                      \

echo
echo "$cmd_abort_on_error"
echo

echo
echo '@echo.'
echo '@echo clbuild: successfully linked: shared library.'
echo '@echo.'
echo

echo
echo '@echo.'
echo '@echo yay.'
echo '@echo.'
echo

# all done
exit 0