[PATCH] Makefile.svn: Make stock SVN executable configurable

[Ramkumar Ramachandra]

[[[
Makefile.svn: Make stock SVN binary configurable

* tools/dev/unix-build/Makefile.svn: Introduce a new variable
  $STOCK_SVN that defaults to `env LD_LIBRARY_PATH= svn`. Change
  references to `svn export` and `svn co` to use $STOCK_SVN.
]]]

Index: tools/dev/unix-build/Makefile.svn
===================================================================
--- tools/dev/unix-build/Makefile.svn   (revision 1056662)
+++ tools/dev/unix-build/Makefile.svn   (working copy)
@@ -10,6 +10,9 @@ ENABLE_JAVA_BINDINGS ?= no # they don't build with
 USE_APR_ICONV ?= no # set to yes to use APR iconv instead of GNU iconv
 PARALLEL ?= PARALLEL=1 CLEANUP=1
 
+# Assumes that `svn` is in $PATH and uses distribution APR libraries
+STOCK_SVN      = env LD_LIBRARY_PATH= svn
+
 PWD            = $(shell pwd)
 UNAME          = $(shell uname)
 
@@ -230,7 +233,7 @@ apr-clean:
 $(APR_OBJDIR)/.retrieved:
        [ -d $(APR_OBJDIR) ] || mkdir -p $(APR_OBJDIR)
        if [ ! -d $(APR_SRCDIR) ]; then \
-               svn export $(APR_URL)/tags/$(APR_VER)/ $(APR_SRCDIR); \
+               $(STOCK_SVN) export $(APR_URL)/tags/$(APR_VER)/ $(APR_SRCDIR); \
        fi
        touch $@
 
@@ -426,7 +429,7 @@ apr-util-clean:
 $(APR_UTIL_OBJDIR)/.retrieved:
        [ -d $(APR_UTIL_OBJDIR) ] || mkdir -p $(APR_UTIL_OBJDIR)
        if [ ! -d $(APR_UTIL_SRCDIR) ]; then \
-               svn export $(APR_UTIL_URL)/tags/$(APR_UTIL_VER)/ \
+               $(STOCK_SVN) export $(APR_UTIL_URL)/tags/$(APR_UTIL_VER)/ \
                        $(APR_UTIL_SRCDIR); \
        fi
        touch $@
@@ -622,7 +625,7 @@ serf-clean:
 $(SERF_OBJDIR)/.retrieved:
        [ -d $(SERF_OBJDIR) ] || mkdir -p $(SERF_OBJDIR)
        if [ ! -d $(SERF_SRCDIR) ]; then \
-               svn export $(SERF_URL) $(SERF_SRCDIR); \
+               $(STOCK_SVN) export $(SERF_URL) $(SERF_SRCDIR); \
        fi
        touch $@
 
@@ -663,7 +666,7 @@ serf-old-clean:
 $(SERF_OLD_OBJDIR)/.retrieved:
        [ -d $(SERF_OLD_OBJDIR) ] || mkdir -p $(SERF_OLD_OBJDIR)
        if [ ! -d $(SERF_OLD_SRCDIR) ]; then \
-               svn export $(SERF_OLD_URL) $(SERF_OLD_SRCDIR); \
+               $(STOCK_SVN) export $(SERF_OLD_URL) $(SERF_OLD_SRCDIR); \
        fi
        touch $@
 
@@ -842,7 +845,7 @@ $(SVN_OBJDIR)/.retrieved:
                co="co"; \
        fi; \
        if [ ! -d $(SVN_WC) ] && [ ! -h $(SVN_WC) ]; then \
-               svn $${co} $(SUBVERSION_REPOS_URL)/$${branchdir} \
+               $(STOCK_SVN) $${co} $(SUBVERSION_REPOS_URL)/$${branchdir} \
                        $(SVN_WC); \
        fi
        touch $@