Replace thumbnail Makefile with configure script

The thumbnail subproject has dependencies against dynstr and
ImageMagick6, which might or might not be available on the system, or
might have been installed to non-standard paths.

Therefore, it is more robust to rely on a configure script that checks
whether the packages are available and how to deal with CFLAGS/LDFLAGS.

1 files changed, 144 insertions, 0 deletions

diff --git a/thumbnail/configure b/thumbnail/configure
new file mode 100755
index 0000000..3ca488b
--- /dev/null
+++ b/thumbnail/configure
@@ -0,0 +1,144 @@
+#! /bin/sh
+
+set -e
+
+default_prefix=/usr/local
+prefix=$default_prefix
+default_CC='c99'
+# FILE_OFFSET_BITS=64 is required for large file support on 32-bit platforms.
+default_CFLAGS='-O1 -D_FILE_OFFSET_BITS=64 -MD'
+
+CC=${CC:-$default_CC}
+
+help()
+{
+	cat <<-EOF
+$0 [OPTION ...]
+
+--prefix      Set installation directory [$default_prefix]
+
+Some influential environment variables:
+  CC                  C compiler [$default_CC]
+  CFLAGS              C compiler flags [$default_CFLAGS]
+  LDFLAGS             Link-time flags [$default_LDFLAGS]
+EOF
+}
+
+while true; do
+	split_arg=0
+
+	if printf "%s" "$1" | grep -e '=' > /dev/null
+	then
+		key="$(printf "%s" "$1" | cut -d '=' -f1)"
+		value="$(printf "%s" "$1" | cut -d '=' -f2)"
+		split_arg=1
+	else
+		key="$1"
+		value="$2"
+	fi
+
+	case "$key" in
+		--prefix ) prefix="$value"; shift; test $split_arg -eq 0 && shift ;;
+		-h | --help ) help; exit 0 ;;
+		* ) test "$1" != "" && help && exit 1 || break ;;
+	esac
+done
+
+if pkg-config ImageMagick-im6
+then
+	CFLAGS="$(pkg-config --cflags ImageMagick-im6) $CFLAGS"
+	LDFLAGS="$(pkg-config --libs ImageMagick-im6) $LDFLAGS"
+else
+	echo "Error: ImageMagick-im6 not found." >&2
+	exit 1
+fi
+
+if pkg-config dynstr
+then
+	in_tree_dynstr=0
+	CFLAGS="$(pkg-config --cflags dynstr) $CFLAGS"
+	LDFLAGS="$(pkg-config --libs dynstr) $LDFLAGS"
+else
+	echo "Info: dynstr not found. Using in-tree copy" >&2
+	in_tree_dynstr=1
+	CFLAGS="-I../libweb/dynstr/include $CFLAGS"
+	LDFLAGS="-L../libweb/dynstr -ldynstr $LDFLAGS"
+fi
+
+CFLAGS="$default_CFLAGS $CFLAGS"
+LDFLAGS="$default_LDFLAGS $LDFLAGS"
+
+cleanup()
+{
+	rm -f $F
+}
+
+F=/tmp/Makefile.thumbnail
+trap cleanup EXIT
+
+cat <<EOF > $F
+.POSIX:
+
+CC = $CC
+PREFIX = $prefix
+DST = $prefix/bin
+CFLAGS = $CFLAGS
+LDFLAGS = $LDFLAGS
+EOF
+
+cat <<"EOF" >> $F
+.POSIX:
+
+PROJECT = thumbnail
+DEPS = $(OBJECTS:.o=.d)
+OBJECTS = \
+	crealpath.o \
+	main.o \
+	cftw.o
+
+all: $(PROJECT)
+
+FORCE:
+
+install: all
+	install $(PROJECT) $(PREFIX)/bin/
+
+$(PROJECT): $(OBJECTS) $(DYNSTR)
+	$(CC) $(OBJECTS) $(LDFLAGS) -o $@
+EOF
+
+if [ $in_tree_dynstr -ne 0 ]
+then
+cat <<"EOF" >> $F
+DYNSTR = ../libweb/dynstr/libdynstr.a
+$(PROJECT): $(DYNSTR)
+$(DYNSTR): FORCE
+	+cd ../libweb/dynstr && $(MAKE) CC=$(CC)
+EOF
+fi
+
+cat <<"EOF" >> $F
+clean:
+	rm -f $(OBJECTS) $(DEPS)
+EOF
+
+if [ $in_tree_dynstr -ne 0 ]
+then
+cat <<"EOF" >> $F
+	+cd ../libweb/dynstr && $(MAKE) clean
+EOF
+fi
+
+cat <<"EOF" >> $F
+distclean: clean
+	rm -f $(PROJECT)
+	rm Makefile
+EOF
+
+# dynstr has no distclean target as of the time of this writing.
+
+cat <<"EOF" >> $F
+-include $(DEPS)
+EOF
+
+mv $F Makefile