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[pcre2] don't add PRCE2_HOME to the search path if it is empty
This used to add -L/lib to LDFLAGS which was not an issue unless you are cross compiling and then it may detect PCRE features based on the host PCRE not the target one.
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@ -140,8 +140,10 @@ then
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# If both library and header were found, action-if-found
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#
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m4_ifblank([$2],[
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CPPFLAGS="$CPPFLAGS -I${PCRE2_HOME}/include"
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LDFLAGS="$LDFLAGS -L${PCRE2_HOME}/lib"
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if test -n "${PCRE2_HOME}"; then
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CPPFLAGS="$CPPFLAGS -I${PCRE2_HOME}/include"
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LDFLAGS="$LDFLAGS -L${PCRE2_HOME}/lib"
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fi
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LIBS="-lpcre2-8 $LIBS"
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AC_DEFINE([HAVE_PCRE2], [1],
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[Define to 1 if you have `PCRE2' library (-lpcre2-$1)])
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