More on autogen 5 build failure

[Richard Kenner]

It seems those errors are because options.h comes from /usr/local/include,
which seems to be a related header (peculiar it's going there).  But when
I remove it, I get:

gcc -DHAVE_CONFIG_H -I. -I. -I.. -I. -I. -I/usr/local/include   -I../autoopts -I
../autoopts     -I../snprintfv -I../snprintfv   -I.. -I..    -g -O2 -c opts.c
opts.c: In function `doOptLoad_Functions':
opts.c:755: `RTLD_GLOBAL' undeclared (first use in this function)
opts.c:755: (Each undeclared identifier is reported only once
opts.c:755: for each function it appears in.)

And indeed I don't see that symbol defined anywhere in the autogen
package.

What's going on?