Fix for empty extra match/target man page list processing

diff --git a/extensions/Makefile b/extensions/Makefile
index 3012f7806c50706a8faf6b91cfb7d2296fa9acef..1d32193a993b8ce1184864e77a5f48dde8b95eac 100644 (file)
--- a/extensions/Makefile
+++ b/extensions/Makefile
@@ -109,7 +109,8 @@ extensions/libipt_targets.man: $(patsubst %,extensions/libipt_%.man,$(PF_EXT_MAN
            cat extensions/libipt_$$ext.man ;\
        done >extensions/libipt_targets.man
        @if [ -n "$(PF_EXT_MAN_EXTRA_TARGETS)" ]; then \
-           for ext in $(PF_EXT_MAN_EXTRA_TARGETS); do \
+           extra=$(PF_EXT_MAN_EXTRA_TARGETS) \
+           for ext in $${extra:-""}; do \
                echo ".SS $$ext (not supported, see Patch-O-Matic)" ;\
                cat extensions/libipt_$$ext.man ;\
            done ;\
@@ -122,7 +123,8 @@ extensions/libipt_matches.man: $(patsubst %,extensions/libipt_%.man,$(PF_EXT_MAN
            cat extensions/libipt_$$ext.man ;\
        done >extensions/libipt_matches.man
        @if [ -n "$(PF_EXT_MAN_EXTRA_MATCHES)" ]; then \
-           for ext in $(PF_EXT_MAN_EXTRA_MATCHES); do \
+           extra=$(PF_EXT_MAN_EXTRA_MATCHES) \
+           for ext in $${extra:-""}; do \
                echo ".SS $$ext (not supported, see Patch-O-Matic)" ;\
                cat extensions/libipt_$$ext.man ;\
            done ;\
@@ -135,7 +137,8 @@ extensions/libip6t_targets.man: $(patsubst %, extensions/libip6t_%.man, $(PF6_EX
            cat extensions/libip6t_$$ext.man ;\
        done >extensions/libip6t_targets.man
        @if [ -n "$(PF6_EXT_MAN_EXTRA_TARGETS)" ]; then \
-           for ext in $(PF6_EXT_MAN_EXTRA_TARGETS); do \
+           extra=$(PF6_EXT_MAN_EXTRA_TARGETS) \
+           for ext in $${extra:-""}; do \
                echo ".SS $$ext (not supported, see Patch-O-Matic)" ;\
                cat extensions/libip6t_$$ext.man ;\
            done ;\
@@ -148,7 +151,8 @@ extensions/libip6t_matches.man: $(patsubst %, extensions/libip6t_%.man, $(PF6_EX
            cat extensions/libip6t_$$ext.man ;\
        done >extensions/libip6t_matches.man
        @if [ -n "$(PF6_EXT_MAN_EXTRA_MATCHES)" ]; then \
-           for ext in $(PF6_EXT_MAN_EXTRA_MATCHES); do \
+           extra=$(PF6_EXT_MAN_EXTRA_MATCHES) \
+           for ext in $${extra:-""}; do \
                echo ".SS $$ext (not supported, see Patch-O-Matic)" ;\
                cat extensions/libip6t_$$ext.man ;\
            done ;\