On that second problem, a fragment of config.log follows:

 ...
 configure:1867: checking whether gcc accepts -g
 configure:1885: gcc -c -g  conftest.c >&5
 configure:1888: $? = 0
 configure:1899: result: yes
 configure:1924: checking how to run the C preprocessor
 configure:1948: gcc -E  conftest.c >/dev/null 2>conftest.err
 sh: illegal io
 configure:1951: $? = 1
 configure: failed program was:
 ...

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