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From: Garrett Rooney <[EMAIL PROTECTED]>
Subject: Re: Who broke 'make clean' for ports ?
Date: Sat, May 11, 2002 at 02:31:32AM JST

> there's a circular dependency that was just introduced to gettext.
> gettext now depends on expat, which depends on gmake, which depends on
> gettext.

Recently, I wrote a patch for bsd.port.mk that checks circular dependency.
If a dependency loop is found, it gives you a warning and
does not invoke 'make' process any further.

Someone, please test the patch below.
If no problem is found, I will send-pr(8).
Index: bsd.port.mk
===================================================================
RCS file: /home/ncvs/ports/Mk/bsd.port.mk,v
retrieving revision 1.411
diff -u -u -r1.411 bsd.port.mk
--- bsd.port.mk 27 Apr 2002 11:22:59 -0000      1.411
+++ bsd.port.mk 8 May 2002 17:13:40 -0000
@@ -684,6 +684,16 @@
 .else
 PORTSDIR?=             /usr/ports
 .endif
+.if exists(/bin/realpath)
+PORTSDIR!=             /bin/realpath ${PORTSDIR}
+.else
+PORTSDIR_IS_SYMLINK!=  if [ -L ${PORTSDIR} ]; then echo "yes" ; fi
+. if ${PORTSDIR_IS_SYMLINK} == "yes"
+. error        "PORTSDIR" must not be a symlink
+. endif
+. undef PORTSDIR_IS_SYMLINK
+.endif
+
 LOCALBASE?=            ${DESTDIR}/usr/local
 X11BASE?=              ${DESTDIR}/usr/X11R6
 LINUXBASE?=            ${DESTDIR}/compat/linux
@@ -3068,11 +3078,20 @@
        @${ALL-DEPENDS-LIST}
 
 ALL-DEPENDS-LIST= \
+       parents="${PARENTS} ${.CURDIR}"; \
        checked="${PARENT_CHECKED}"; \
-       for dir in $$(${ECHO_CMD} "${FETCH_DEPENDS} ${BUILD_DEPENDS} ${LIB_DEPENDS} 
${RUN_DEPENDS}" | ${TR} '\040' '\012' | ${SED} -e 's/^[^:]*://' -e 's/:.*//') 
$$(${ECHO_CMD} ${DEPENDS} | ${TR} '\040' '\012' | ${SED} -e 's/:.*//'); do \
+       for dir in $$( { ${ECHO_CMD} "${FETCH_DEPENDS} ${BUILD_DEPENDS} ${LIB_DEPENDS} 
+${RUN_DEPENDS}" | ${TR} '\040' '\012' | ${SED} -e 's/^[^:]*://' -e 's/:.*//' ; 
+${ECHO_CMD} ${DEPENDS} | ${TR} '\040' '\012' | ${SED} -e 's/:.*//'; } | sort -u); do \
                if [ -d $$dir ]; then \
-                       if (${ECHO_CMD} $$checked | ${GREP} -qwv "$$dir"); then \
-                               child=$$(cd $$dir; ${MAKE} PARENT_CHECKED="$$checked" 
all-depends-list); \
+                       for p in $$parents; do \
+                               if [ "$$p" = "$$dir" ]; then \
+                                       ${ECHO_MSG} "Dependency loop:" >&2; \
+                                       ${ECHO_MSG} "${.CURDIR} => $$p" >&2; \
+                                       ${ECHO_MSG} "" >&2; \
+                                       exit 1;\
+                               fi; \
+                       done; \
+                       if $$( for c in $$checked; do if [ "$$dir" = "$$c" ]; then 
+exit 1; fi ; done ); then \
+                               child=$$(cd $$dir; ${MAKE} PARENTS="$$parents" 
+PARENT_CHECKED="$$checked" all-depends-list); \
                                for d in $$child; do ${ECHO_CMD} $$d; done; \
                                ${ECHO_CMD} $$dir; \
                                checked="$$dir $$child $$checked"; \
@@ -3155,11 +3174,20 @@
        if [ "${CHILD_DEPENDS}" ]; then \
                ${ECHO_CMD} "${PKGNAME} ${.CURDIR}"; \
        fi; \
+       parents="${PARENTS} ${.CURDIR}"; \
        checked="${PARENT_CHECKED}"; \
-       for dir in $$(${ECHO_CMD} "${LIB_DEPENDS} ${RUN_DEPENDS}" | ${TR} '\040' 
'\012' | ${SED} -e 's/^[^:]*://' -e 's/:.*//') $$(${ECHO_CMD} ${DEPENDS} | ${TR} 
'\040' '\012' | ${SED} -e 's/:.*//'); do \
+       for dir in $$( { ${ECHO_CMD} "${LIB_DEPENDS} ${RUN_DEPENDS}" | ${TR} '\040' 
+'\012' | ${SED} -e 's/^[^:]*://' -e 's/:.*//' ; ${ECHO_CMD} ${DEPENDS} | ${TR} '\040' 
+'\012' | ${SED} -e 's/:.*//'; } | sort -u); do \
                if [ -d $$dir ]; then \
-                       if (${ECHO_CMD} $$checked | ${GREP} -qwv "$$dir"); then \
-                               childout=$$(cd $$dir; ${MAKE} CHILD_DEPENDS=yes 
PARENT_CHECKED="$$checked" package-depends-list); \
+                       for p in $$parents; do \
+                               if [ "$$p" = "$$dir" ]; then \
+                                       ${ECHO_MSG} "Dependency loop:" >&2; \
+                                       ${ECHO_MSG} "${.CURDIR} => $$p" >&2; \
+                                       ${ECHO_MSG} "" >&2; \
+                                       exit 1;\
+                               fi; \
+                       done; \
+                       if $$( for c in $$checked; do if [ "$$dir" = "$$c" ]; then 
+exit 1; fi ; done ); then \
+                               childout=$$(cd $$dir; ${MAKE} CHILD_DEPENDS=yes 
+PARENTS="$$parents" PARENT_CHECKED="$$checked" package-depends-list); \
                                set -- $$childout; \
                                childname=""; childdir=""; \
                                while [ $$\# != 0 ]; do \
@@ -3173,7 +3201,7 @@
                else \
                        ${ECHO_MSG} "${PKGNAME}: \"$$dir\" non-existent -- dependency 
list incomplete" >&2; \
                fi; \
-       done
+       done | sort -u
 
 # Print out package names.
 

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