In for loop values, introduce a dummy to protect against empty list

In constructions such as 'for x in $(MAKEVAR); do ...', there's the
possibility that $(MAKEVAR) is en empty value.  Some shells don't like
that, so introduce a dummy value that gets discarded:

    for x in dummy $(MAKEVAR); do
        if [ "$$x" = "dummy" ]; then continue; fi

Closes RT#4459

Reviewed-by: Rich Salz <rsalz@openssl.org>

diff --git a/Configurations/unix-Makefile.tmpl b/Configurations/unix-Makefile.tmpl
index 4dced5d9cc5be86e44daa19faaf50640674cd5f1..966565bd6e6ec8ba820f9ae03473f6dccd1c7c84 100644 (file)
--- a/Configurations/unix-Makefile.tmpl
+++ b/Configurations/unix-Makefile.tmpl
@@ -391,7 +391,8 @@ install_engines:
        @[ -n "$(INSTALLTOP)" ] || (echo INSTALLTOP should not be empty; exit 1)
        @$(PERL) $(SRCDIR)/util/mkdir-p.pl $(DESTDIR)$(INSTALLTOP)/$(LIBDIR)/engines/
        @echo "*** Installing engines"
-       @set -e; for e in $(ENGINES); do \
+       @set -e; for e in dummy $(ENGINES); do \
+               if [ "$$e" = "dummy" ]; then continue; fi; \
                fn=`basename $$e`; \
                if [ "$$fn" = '{- dso("ossltest") -}' ]; then \
                        continue; \
@@ -405,7 +406,8 @@ install_engines:
 
 uninstall_engines:
        @echo "*** Uninstalling engines"
-       @set -e; for e in $(ENGINES); do \
+       @set -e; for e in dummy $(ENGINES); do \
+               if [ "$$e" = "dummy" ]; then continue; fi; \
                fn=`basename $$e`; \
                if [ "$$fn" = '{- dso("ossltest") -}' ]; then \
                        continue; \
@@ -421,7 +423,8 @@ install_runtime:
        @$(PERL) $(SRCDIR)/util/mkdir-p.pl $(DESTDIR)$(OPENSSLDIR)/misc
        @echo "*** Installing runtime files"
        : {- output_off() unless windowsdll(); "" -};
-       @set -e; for s in $(SHLIBS); do \
+       @set -e; for s in dummy $(SHLIBS); do \
+               if [ "$$s" = "dummy" ]; then continue; fi; \
                fn=`basename $$s`; \
                echo "install $$s -> $(DESTDIR)$(INSTALLTOP)/bin/$$fn"; \
                cp $$s $(DESTDIR)$(INSTALLTOP)/bin/$$fn.new; \
@@ -430,7 +433,8 @@ install_runtime:
                      $(DESTDIR)$(INSTALLTOP)/bin/$$fn; \
        done
        : {- output_on() unless windowsdll(); "" -};
-       @set -e; for x in $(PROGRAMS); do \
+       @set -e; for x in dummy $(PROGRAMS); do \
+               if [ "$$x" = "dummy" ]; then continue; fi; \
                fn=`basename $$x`; \
                echo "install $$x -> $(DESTDIR)$(INSTALLTOP)/bin/$$fn"; \
                cp $$x $(DESTDIR)$(INSTALLTOP)/bin/$$fn.new; \
@@ -438,7 +442,8 @@ install_runtime:
                mv -f $(DESTDIR)$(INSTALLTOP)/bin/$$fn.new \
                      $(DESTDIR)$(INSTALLTOP)/bin/$$fn; \
        done
-       @set -e; for x in $(BIN_SCRIPTS); do \
+       @set -e; for x in dummy $(BIN_SCRIPTS); do \
+               if [ "$$x" = "dummy" ]; then continue; fi; \
                fn=`basename $$x`; \
                echo "install $$x -> $(DESTDIR)$(INSTALLTOP)/bin/$$fn"; \
                cp $$x $(DESTDIR)$(INSTALLTOP)/bin/$$fn.new; \
@@ -446,7 +451,8 @@ install_runtime:
                mv -f $(DESTDIR)$(INSTALLTOP)/bin/$$fn.new \
                      $(DESTDIR)$(INSTALLTOP)/bin/$$fn; \
        done
-       @set -e; for x in $(MISC_SCRIPTS); do \
+       @set -e; for x in dummy $(MISC_SCRIPTS); do \
+               if [ "$$x" = "dummy" ]; then continue; fi; \
                fn=`basename $$x`; \
                echo "install $$x -> $(DESTDIR)$(OPENSSLDIR)/misc/$$fn"; \
                cp $$x $(DESTDIR)$(OPENSSLDIR)/misc/$$fn.new; \
@@ -461,26 +467,30 @@ install_runtime:
 
 uninstall_runtime:
        @echo "*** Uninstalling runtime files"
-       @set -e; for x in $(PROGRAMS); \
+       @set -e; for x in dummy $(PROGRAMS); \
        do  \
+               if [ "$$x" = "dummy" ]; then continue; fi; \
                fn=`basename $$x`; \
                echo "$(RM) $(DESTDIR)$(INSTALLTOP)/bin/$$fn"; \
                $(RM) $(DESTDIR)$(INSTALLTOP)/bin/$$fn; \
        done;
-       @set -e; for x in $(BIN_SCRIPTS); \
+       @set -e; for x in dummy $(BIN_SCRIPTS); \
        do  \
+               if [ "$$x" = "dummy" ]; then continue; fi; \
                fn=`basename $$x`; \
                echo "$(RM) $(DESTDIR)$(INSTALLTOP)/bin/$$fn"; \
                $(RM) $(DESTDIR)$(INSTALLTOP)/bin/$$fn; \
        done
-       @set -e; for x in $(MISC_SCRIPTS); \
+       @set -e; for x in dummy $(MISC_SCRIPTS); \
        do  \
+               if [ "$$x" = "dummy" ]; then continue; fi; \
                fn=`basename $$x`; \
                echo "$(RM) $(DESTDIR)$(OPENSSLDIR)/misc/$$fn"; \
                $(RM) $(DESTDIR)$(OPENSSLDIR)/misc/$$fn; \
        done
        : {- output_off() unless windowsdll(); "" -};
-       @set -e; for s in $(SHLIBS); do \
+       @set -e; for s in dummy $(SHLIBS); do \
+               if [ "$$s" = "dummy" ]; then continue; fi; \
                fn=`basename $$s`; \
                echo "$(RM) $(DESTDIR)$(INSTALLTOP)/bin/$$fn"; \
                $(RM) $(DESTDIR)$(INSTALLTOP)/bin/$$fn; \