Index: dbus/build.sh
==================================================================
--- dbus/build.sh
+++ dbus/build.sh
@@ -25,14 +25,14 @@
 OUTDIR="$(pwd)/out"
 INSTDIR="$(pwd)/inst"
 export DBUSVERS SRC SRCURL BUILDDIR OUTDIR INSTDIR
 
 # Set configure options for this sub-project
-LDFLAGS="${KC_DBUS_LDFLAGS}"
-CFLAGS="${KC_DBUS_CFLAGS}"
-CPPFLAGS="${KC_DBUS_CPPFLAGS}"
-LIBS="${KC_DBUS_LIBS}"
+LDFLAGS="${LDFLAGS} ${KC_DBUS_LDFLAGS}"
+CFLAGS="${CFLAGS} ${KC_DBUS_CFLAGS}"
+CPPFLAGS="${CPPFLAGS} ${KC_DBUS_CPPFLAGS}"
+LIBS="${LIBS} ${KC_DBUS_LIBS}"
 export LDFLAGS CFLAGS CPPFLAGS LIBS
 
 if [ ! -f "${SRC}" ]; then
 	mkdir 'src' >/dev/null 2>/dev/null
 

Index: itcl/build.sh
==================================================================
--- itcl/build.sh
+++ itcl/build.sh
@@ -19,14 +19,14 @@
 OUTDIR="$(pwd)/out"
 INSTDIR="$(pwd)/inst"
 export ITCLVERS SRC SRCURL BUILDDIR OUTDIR INSTDIR
 
 # Set configure options for this sub-project
-LDFLAGS="${KC_ITCL_LDFLAGS}"
-CFLAGS="${KC_ITCL_CFLAGS}"
-CPPFLAGS="${KC_ITCL_CPPFLAGS}"
-LIBS="${KC_ITCL_LIBS}"
+LDFLAGS="${LDFLAGS} ${KC_ITCL_LDFLAGS}"
+CFLAGS="${CFLAGS} ${KC_ITCL_CFLAGS}"
+CPPFLAGS="${CPPFLAGS} ${KC_ITCL_CPPFLAGS}"
+LIBS="${LIBS} ${KC_ITCL_LIBS}"
 export LDFLAGS CFLAGS CPPFLAGS LIBS
 
 rm -rf 'build' 'out' 'inst'
 mkdir 'build' 'out' 'inst' || exit 1
 

Index: kitsh/build.sh
==================================================================
--- kitsh/build.sh
+++ kitsh/build.sh
@@ -18,14 +18,14 @@
 OTHERPKGSDIR="$(pwd)/../"
 export KITSHVERS BUILDDIR OUTDIR INSTDIR OTHERPKGSDIR
 
 # Set configure options for this sub-project
 LDFLAGS_ADD="${KC_KITSH_LDFLAGS_ADD}"
-LDFLAGS="${KC_KITSH_LDFLAGS}"
-CFLAGS="${KC_KITSH_CFLAGS}"
-CPPFLAGS="${KC_KITSH_CPPFLAGS}"
-LIBS="${KC_KITSH_LIBS}"
+LDFLAGS="${LDFLAGS} ${KC_KITSH_LDFLAGS}"
+CFLAGS="${CFLAGS} ${KC_KITSH_CFLAGS}"
+CPPFLAGS="${CPPFLAGS} ${KC_KITSH_CPPFLAGS}"
+LIBS="${LIBS} ${KC_KITSH_LIBS}"
 export LDFLAGS_ADD LDFLAGS CFLAGS CPPFLAGS LIBS
 
 if [ -z "${ENABLECOMPRESSION}" ]; then
 	ENABLECOMPRESSION="1"
 fi

Index: mk4tcl/build.sh
==================================================================
--- mk4tcl/build.sh
+++ mk4tcl/build.sh
@@ -19,14 +19,15 @@
 INSTDIR="$(pwd)/inst"
 PATCHDIR="$(pwd)/patches"
 export MK4VERS SRC SRCURL BUILDDIR OUTDIR INSTDIR PATCHDIR
 
 # Set configure options for this sub-project
-LDFLAGS="${KC_MK4TCL_LDFLAGS}"
-CFLAGS="${KC_MK4TCL_CFLAGS}"
-CPPFLAGS="${KC_MK4TCL_CPPFLAGS}"
-LIBS="${KC_MK4TCL_LIBS}"
+LDFLAGS="${LDFLAGS} ${KC_MK4TCL_LDFLAGS}"
+CFLAGS="${CFLAGS} ${KC_MK4TCL_CFLAGS}"
+CXXFLAGS="${CXXFLAGS} ${KC_MK4TCL_CXXFLAGS}"
+CPPFLAGS="${CPPFLAGS} ${KC_MK4TCL_CPPFLAGS}"
+LIBS="${LIBS} ${KC_MK4TCL_LIBS}"
 export LDFLAGS CFLAGS CPPFLAGS LIBS
 
 rm -rf 'build' 'out' 'inst'
 mkdir 'build' 'out' 'inst' || exit 1
 

Index: tcc4tcl/build.sh
==================================================================
--- tcc4tcl/build.sh
+++ tcc4tcl/build.sh
@@ -19,14 +19,14 @@
 INSTDIR="$(pwd)/inst"
 PATCHDIR="$(pwd)/patches"
 export TCC4TCLVERS SRC SRCURL BUILDDIR OUTDIR INSTDIR PATCHDIR
 
 # Set configure options for this sub-project
-LDFLAGS="${KC_TCC4TCL_LDFLAGS}"
-CFLAGS="${KC_TCC4TCL_CFLAGS}"
-CPPFLAGS="${KC_TCC4TCL_CPPFLAGS}"
-LIBS="${KC_TCC4TCL_LIBS}"
+LDFLAGS="${LDFLAGS} ${KC_TCC4TCL_LDFLAGS}"
+CFLAGS="${CFLAGS} ${KC_TCC4TCL_CFLAGS}"
+CPPFLAGS="${CPPFLAGS} ${KC_TCC4TCL_CPPFLAGS}"
+LIBS="${LIBS} ${KC_TCC4TCL_LIBS}"
 export LDFLAGS CFLAGS CPPFLAGS LIBS
 
 rm -rf 'build' 'out' 'inst'
 mkdir 'build' 'out' 'inst' || exit 1
 

Index: tcl/build.sh
==================================================================
--- tcl/build.sh
+++ tcl/build.sh
@@ -19,14 +19,14 @@
 PATCHSCRIPTDIR="$(pwd)/patchscripts"
 PATCHDIR="$(pwd)/patches"
 export SRC SRCURL BUILDDIR OUTDIR INSTDIR PATCHSCRIPTDIR PATCHDIR
 
 # Set configure options for this sub-project
-LDFLAGS="${KC_TCL_LDFLAGS}"
-CFLAGS="${KC_TCL_CFLAGS}"
-CPPFLAGS="${KC_TCL_CPPFLAGS}"
-LIBS="${KC_TCL_LIBS}"
+LDFLAGS="${LDFLAGS} ${KC_TCL_LDFLAGS}"
+CFLAGS="${CFLAGS} ${KC_TCL_CFLAGS}"
+CPPFLAGS="${CPPFLAGS} ${KC_TCL_CPPFLAGS}"
+LIBS="${LIBS} ${KC_TCL_LIBS}"
 export LDFLAGS CFLAGS CPPFLAGS LIBS
 
 rm -rf 'build' 'out' 'inst'
 mkdir 'build' 'out' 'inst' || exit 1
 

Index: tclvfs/build.sh
==================================================================
--- tclvfs/build.sh
+++ tclvfs/build.sh
@@ -19,14 +19,14 @@
 INSTDIR="$(pwd)/inst"
 PATCHDIR="$(pwd)/patches"
 export TCLVFSVERS SRC SRCURL BUILDDIR OUTDIR INSTDIR PATCHDIR
 
 # Set configure options for this sub-project
-LDFLAGS="${KC_TCLVFS_LDFLAGS}"
-CFLAGS="${KC_TCLVFS_CFLAGS}"
-CPPFLAGS="${KC_TCLVFS_CPPFLAGS}"
-LIBS="${KC_TCLVFS_LIBS}"
+LDFLAGS="${LDFLAGS} ${KC_TCLVFS_LDFLAGS}"
+CFLAGS="${CFLAGS} ${KC_TCLVFS_CFLAGS}"
+CPPFLAGS="${CPPFLAGS} ${KC_TCLVFS_CPPFLAGS}"
+LIBS="${LIBS} ${KC_TCLVFS_LIBS}"
 export LDFLAGS CFLAGS CPPFLAGS LIBS
 
 rm -rf 'build' 'out' 'inst'
 mkdir 'build' 'out' 'inst' || exit 1
 

Index: tclx/build.sh
==================================================================
--- tclx/build.sh
+++ tclx/build.sh
@@ -19,14 +19,14 @@
 INSTDIR="$(pwd)/inst"
 PATCHDIR="$(pwd)/patches"
 export TCLXVERS SRC SRCURL BUILDDIR OUTDIR INSTDIR PATCHDIR
 
 # Set configure options for this sub-project
-LDFLAGS="${KC_TCLX_LDFLAGS}"
-CFLAGS="${KC_TCLX_CFLAGS}"
-CPPFLAGS="${KC_TCLX_CPPFLAGS}"
-LIBS="${KC_TCLX_LIBS}"
+LDFLAGS="${LDFLAGS} ${KC_TCLX_LDFLAGS}"
+CFLAGS="${CFLAGS} ${KC_TCLX_CFLAGS}"
+CPPFLAGS="${CPPFLAGS} ${KC_TCLX_CPPFLAGS}"
+LIBS="${LIBS} ${KC_TCLX_LIBS}"
 export LDFLAGS CFLAGS CPPFLAGS LIBS
 
 rm -rf 'build' 'out' 'inst'
 mkdir 'build' 'out' 'inst' || exit 1
 

Index: thread/build.sh
==================================================================
--- thread/build.sh
+++ thread/build.sh
@@ -18,14 +18,14 @@
 OUTDIR="$(pwd)/out"
 INSTDIR="$(pwd)/inst"
 export THREADVERS SRC SRCURL BUILDDIR OUTDIR INSTDIR
 
 # Set configure options for this sub-project
-LDFLAGS="${KC_THREAD_LDFLAGS}"
-CFLAGS="${KC_THREAD_CFLAGS}"
-CPPFLAGS="${KC_THREAD_CPPFLAGS}"
-LIBS="${KC_THREAD_LIBS}"
+LDFLAGS="${LDFLAGS} ${KC_THREAD_LDFLAGS}"
+CFLAGS="${CFLAGS} ${KC_THREAD_CFLAGS}"
+CPPFLAGS="${CPPFLAGS} ${KC_THREAD_CPPFLAGS}"
+LIBS="${LIBS} ${KC_THREAD_LIBS}"
 export LDFLAGS CFLAGS CPPFLAGS LIBS
 
 rm -rf 'build' 'out' 'inst'
 mkdir 'build' 'out' 'inst' || exit 1
 

Index: tk/build.sh
==================================================================
--- tk/build.sh
+++ tk/build.sh
@@ -19,14 +19,14 @@
 INSTDIR="$(pwd)/inst"
 PATCHSCRIPTDIR="$(pwd)/patchscripts"
 export SRC SRCURL BUILDDIR PATCHDIR OUTDIR INSTDIR PATCHSCRIPTDIR
 
 # Set configure options for this sub-project
-LDFLAGS="${KC_TK_LDFLAGS}"
-CFLAGS="${KC_TK_CFLAGS}"
-CPPFLAGS="${KC_TK_CPPFLAGS}"
-LIBS="${KC_TK_LIBS}"
+LDFLAGS="${LDFLAGS} ${KC_TK_LDFLAGS}"
+CFLAGS="${CFLAGS} ${KC_TK_CFLAGS}"
+CPPFLAGS="${CPPFLAGS} ${KC_TK_CPPFLAGS}"
+LIBS="${LIBS} ${KC_TK_LIBS}"
 export LDFLAGS CFLAGS CPPFLAGS LIBS
 
 # Must be kept in-sync with "../tcl/build.sh"
 TCLFOSSILDATE="../tcl/src/tcl${TCLVERS}.tar.gz.date"
 export TCLFOSSILDATE

Index: tls/build.sh
==================================================================
--- tls/build.sh
+++ tls/build.sh
@@ -19,14 +19,14 @@
 INSTDIR="$(pwd)/inst"
 PATCHDIR="$(pwd)/patches"
 export TLSVERS SRC SRCURL BUILDDIR OUTDIR INSTDIR PATCHDIR
 
 # Set configure options for this sub-project
-LDFLAGS="${KC_TLS_LDFLAGS}"
-CFLAGS="${KC_TLS_CFLAGS}"
-CPPFLAGS="${KC_TLS_CPPFLAGS}"
-LIBS="${KC_TLS_LIBS}"
+LDFLAGS="${LDFLAGS} ${KC_TLS_LDFLAGS}"
+CFLAGS="${CFLAGS} ${KC_TLS_CFLAGS}"
+CPPFLAGS="${CPPFLAGS} ${KC_TLS_CPPFLAGS}"
+LIBS="${LIBS} ${KC_TLS_LIBS}"
 export LDFLAGS CFLAGS CPPFLAGS LIBS
 
 rm -rf 'build' 'out' 'inst'
 mkdir 'build' 'out' 'inst' || exit 1
 

Index: zlib/build.sh
==================================================================
--- zlib/build.sh
+++ zlib/build.sh
@@ -18,14 +18,14 @@
 OUTDIR="$(pwd)/out"
 INSTDIR="$(pwd)/inst"
 export ZLIBVERS SRC SRCURL BUILDDIR OUTDIR INSTDIR
 
 # Set configure options for this sub-project
-LDFLAGS="${KC_ZLIB_LDFLAGS}"
-CFLAGS="${KC_ZLIB_CFLAGS}"
-CPPFLAGS="${KC_ZLIB_CPPFLAGS}"
-LIBS="${KC_ZLIB_LIBS}"
+LDFLAGS="${LDFLAGS} ${KC_ZLIB_LDFLAGS}"
+CFLAGS="${CFLAGS} ${KC_ZLIB_CFLAGS}"
+CPPFLAGS="${CPPFLAGS} ${KC_ZLIB_CPPFLAGS}"
+LIBS="${LIBS} ${KC_ZLIB_LIBS}"
 export LDFLAGS CFLAGS CPPFLAGS LIBS
 
 rm -rf 'build' 'out' 'inst'
 mkdir 'build' 'out' 'inst' || exit 1