Enable -dev package dependencies

build-package.sh

@@ -237,6 +237,7 @@ TERMUX_PKG_ESSENTIAL=""
 TERMUX_PKG_CONFLICTS="" # https://www.debian.org/doc/debian-policy/ch-relationships.html#s-conflicts
 TERMUX_PKG_CONFFILES=""
 TERMUX_PKG_INCLUDE_IN_DEVPACKAGE=""
+TERMUX_PKG_DEVPACKAGE_DEPENDS=""
 # Set if a host build should be done in TERMUX_PKG_HOSTBUILD_DIR:
 TERMUX_PKG_HOSTBUILD=""
 TERMUX_PKG_MAINTAINER="Fredrik Fornwall <fredrik@fornwall.net>"
@@ -557,7 +558,11 @@ termux_step_massage () {
                 _DEVEL_SUBPACKAGE_FILE=$TERMUX_PKG_TMPDIR/${TERMUX_PKG_NAME}-dev.subpackage.sh
                 echo TERMUX_SUBPKG_INCLUDE=\"include share/man/man3 lib/pkgconfig share/aclocal $TERMUX_PKG_INCLUDE_IN_DEVPACKAGE\" > $_DEVEL_SUBPACKAGE_FILE
                 echo TERMUX_SUBPKG_DESCRIPTION=\"Development files for ${TERMUX_PKG_NAME}\" >> $_DEVEL_SUBPACKAGE_FILE
-                echo TERMUX_SUBPKG_DEPENDS=\"$TERMUX_PKG_NAME\" >> $_DEVEL_SUBPACKAGE_FILE
+		if [ -n "$TERMUX_PKG_DEVPACKAGE_DEPENDS" ]; then
+			echo TERMUX_SUBPKG_DEPENDS=\"$TERMUX_PKG_NAME,$TERMUX_PKG_DEVPACKAGE_DEPENDS\" >> $_DEVEL_SUBPACKAGE_FILE
+		else
+			echo TERMUX_SUBPKG_DEPENDS=\"$TERMUX_PKG_NAME\" >> $_DEVEL_SUBPACKAGE_FILE
+		fi
 		if [ x$TERMUX_PKG_CONFLICTS != x ]; then
 			# Assume that dev packages conflicts as well.
 			echo "TERMUX_SUBPKG_CONFLICTS=${TERMUX_PKG_CONFLICTS}-dev" >> $_DEVEL_SUBPACKAGE_FILE