find dlopen() if it's not in libdl #57
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some systems (e.g. FreeBSD) have dlopen() and friends in libc (-lc) and do not habe libdl. AC_SEARCH_LIBS handles this case much better than AC_CHECK_LIB and should be preferred anyways, according to the autoconf documentation.
mtrojnar
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Jan 7, 2016
Use AC_SEARCH_LIBS instead of AC_CHECK_LIB to locate dlopen().
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some systems (e.g. FreeBSD) have dlopen() and friends in libc (-lc)
and do not have libdl. AC_SEARCH_LIBS handles this case much better
than AC_CHECK_LIB and should be preferred anyways, according to
the autoconf documentation.