Index: itcl/build.sh
==================================================================
--- itcl/build.sh
+++ itcl/build.sh
@@ -17,10 +17,17 @@
 SRCURL="http://sourceforge.net/projects/incrtcl/files/%5BIncr%20Tcl_Tk%5D-source/${ITCLVERS}/itcl${ITCLVERS}${ITCLVERSEXTRA}.tar.gz/download"
 BUILDDIR="$(pwd)/build/itcl${ITCLVERS}"
 OUTDIR="$(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}"
+export LDFLAGS CFLAGS CPPFLAGS LIBS
 
 rm -rf 'build' 'out' 'inst'
 mkdir 'build' 'out' 'inst' || exit 1
 
 # Determine if Itcl is even needed

Index: kitsh/build.sh
==================================================================
--- kitsh/build.sh
+++ kitsh/build.sh
@@ -15,10 +15,17 @@
 BUILDDIR="$(pwd)/build/kitsh-${KITSHVERS}"
 OUTDIR="$(pwd)/out"
 INSTDIR="$(pwd)/inst"
 OTHERPKGSDIR="$(pwd)/../"
 export KITSHVERS BUILDDIR OUTDIR INSTDIR OTHERPKGSDIR
+
+# Set configure options for this sub-project
+LDFLAGS="${KC_KITSH_LDFLAGS}"
+CFLAGS="${KC_KITSH_CFLAGS}"
+CPPFLAGS="${KC_KITSH_CPPFLAGS}"
+LIBS="${KC_KITSH_LIBS}"
+export LDFLAGS CFLAGS CPPFLAGS LIBS
 
 if [ -z "${ENABLECOMPRESSION}" ]; then
 	ENABLECOMPRESSION="1"
 fi
 export ENABLECOMPRESSION

Index: mk4tcl/build.sh
==================================================================
--- mk4tcl/build.sh
+++ mk4tcl/build.sh
@@ -17,10 +17,17 @@
 BUILDDIR="$(pwd)/build/metakit-${MK4VERS}"
 OUTDIR="$(pwd)/out"
 INSTDIR="$(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}"
+export LDFLAGS CFLAGS CPPFLAGS LIBS
 
 rm -rf 'build' 'out' 'inst'
 mkdir 'build' 'out' 'inst' || exit 1
 
 TCL_VERSION="unknown"

Index: tcl/build.sh
==================================================================
--- tcl/build.sh
+++ tcl/build.sh
@@ -17,10 +17,17 @@
 OUTDIR="$(pwd)/out"
 INSTDIR="$(pwd)/inst"
 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}"
+export LDFLAGS CFLAGS CPPFLAGS LIBS
 
 rm -rf 'build' 'out' 'inst'
 mkdir 'build' 'out' 'inst' || exit 1
 
 if [ ! -f "${SRC}" ]; then

Index: tclvfs/build.sh
==================================================================
--- tclvfs/build.sh
+++ tclvfs/build.sh
@@ -17,10 +17,17 @@
 BUILDDIR="$(pwd)/build/tclvfs-${TCLVFSVERS}"
 OUTDIR="$(pwd)/out"
 INSTDIR="$(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}"
+export LDFLAGS CFLAGS CPPFLAGS LIBS
 
 rm -rf 'build' 'out' 'inst'
 mkdir 'build' 'out' 'inst' || exit 1
 
 TCL_VERSION="unknown"

Index: thread/build.sh
==================================================================
--- thread/build.sh
+++ thread/build.sh
@@ -16,10 +16,17 @@
 SRCURL="http://sourceforge.net/projects/tcl/files/Thread%20Extension/${THREADVERS}/thread${THREADVERS}.tar.gz/download"
 BUILDDIR="$(pwd)/build/thread${THREADVERS}"
 OUTDIR="$(pwd)/out"
 INSTDIR="$(pwd)/inst"
 export ITCLVERS 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}"
+export LDFLAGS CFLAGS CPPFLAGS LIBS
 
 rm -rf 'build' 'out' 'inst'
 mkdir 'build' 'out' 'inst' || exit 1
 
 # Determine if Threads is even needed

Index: tk/build.sh
==================================================================
--- tk/build.sh
+++ tk/build.sh
@@ -17,10 +17,17 @@
 PATCHDIR="$(pwd)/patches"
 OUTDIR="$(pwd)/out"
 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}"
+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: zlib/build.sh
==================================================================
--- zlib/build.sh
+++ zlib/build.sh
@@ -16,10 +16,17 @@
 SRCURL="http://sourceforge.net/projects/libpng/files/zlib/${ZLIBVERS}/zlib-${ZLIBVERS}.tar.gz/download"
 BUILDDIR="$(pwd)/build/zlib-${ZLIBVERS}"
 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}"
+export LDFLAGS CFLAGS CPPFLAGS LIBS
 
 rm -rf 'build' 'out' 'inst'
 mkdir 'build' 'out' 'inst' || exit 1
 
 if [ ! -f "${SRC}" ]; then