and then adds it to LDFLAGS. Later, the configure script tests for the
presence of certain functions in libc, and expects to get an error at
link time if the functions are missing. On Interix with -export-dynamic,
the link succeeds even if there are missing functions. This causes
configure to detect all tested functions as present, and produce
binaries that fail at run time.
To work around this issue, postpone adding -export-dynamic to LDFLAGS
until the end of the configure script.
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