Configure fails due to different behavior in new versions of pkg-config

Hi, since pkg-config 0.28 "pkg-config --cflags-only-I openssl" returns an empty string and not a single space like it did in the previous versions. This breaks the configure script of PHP when called with "./configure --with-imap --with-imap-ssl". The relevant snippet from the configure script is: ... OPENSSL_LIBS=$PKG_CONFIG --libs openssl OPENSSL_INCS=$PKG_CONFIG --cflags-only-I openssl ... if test -n "$OPENSSL_LIBS" && test -n "$OPENSSL_INCS"; then ... I am not sure why we are testing for content in $OPENSSL_INCS anyway. Am I correct that removing " && test -n "$OPENSSL_INCS"" from configure is the correct fix here (and in general)? Greetings, Pierre -- Pierre Schmitz, https://pierre-schmitz.com