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https://issues.apache.org/jira/browse/XERCESC-1892?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12767656#action_12767656
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Scott Cantor commented on XERCESC-1892:
---------------------------------------

I may be able to provide an actual patch later, but in the meantime, the code I 
use for a curl dependency in my project looks like this. I follow that up with 
the usual AC_CHECK_HEADER and AC_CHECK_LIB macros to verify the dependency, but 
this is the meat of it.

        AC_PATH_PROG(CURL_CONFIG,curl-config)
        AC_ARG_WITH(curl,
            AC_HELP_STRING([--with-curl=PATH], [where curl-config is 
installed]),
            [
            CURL_CONFIG="${with_curl}"
            if ! test -f "${CURL_CONFIG}" ; then
                CURL_CONFIG="${with_curl}/bin/curl-config"
            fi
            ])
        if test -f "${CURL_CONFIG}" ; then
            CPPFLAGS="`${CURL_CONFIG} --cflags` $CPPFLAGS"
            LIBS="`${CURL_CONFIG} --libs` $LIBS"
        else
            AC_MSG_ERROR([curl-config not found, may need to use --with-curl 
option])
        fi


> configure  irationally forces -L/usr/local/lib
> ----------------------------------------------
>
>                 Key: XERCESC-1892
>                 URL: https://issues.apache.org/jira/browse/XERCESC-1892
>             Project: Xerces-C++
>          Issue Type: Bug
>    Affects Versions: 3.0.1
>            Reporter: Philip Brown
>
> I am building two sets of tool chains. one 32bit, in /usr/local.
> Another one, 64bit, in /usr/local/64
> I have taken everything referencing /usr/local out of my environment, and 
> have successfully compiled other software. However, when it comes to xerces-c 
> 3.0.1, even though I have explicitly told it
> --prefix=/usr/local/64
> it insists on adding -L/usr/local/lib   for curl or something.  
> I dont know for sure that curl is the reason why it is added.. but it PICKS 
> UP /usr/local/lib/libcurl.la from that, and then screws up my nice 64bit 
> build, by attempting to link in /usr/local/lib/libcurl.so
> When I temporarily remove libcurl.la from there, it compiles. but this is not 
> an acceptible workaround.
> Actually, it would appear that specifying  --with-curl=/usr/local/64 
> overrides, but this is inappropriate! it should check in $prefix FIRST, not 
> decide to go look in /usr/local for curl before anything else.

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