can specify these as environment variables before running ./configure.
For example:
-CFLAGS="-O -m486" LFLAGS="-s" LIBS="-lrubbish" LD="/usr/foo/ld" ./configure
+CFLAGS="-O -m486" LDFLAGS="-s" LIBS="-lrubbish" LD="/usr/foo/ld" ./configure
3. Configuration
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