Configure type checks re-use return values from previous tests

[josefwegner]

Configure type checks will have semi-random values for types. It seems that most of the time previous results will be re-used for the next test:

> sh
> ./configure
...
checking size of char... 1
checking size of short... 2
checking size of int... 2
checking size of long... 2
checking size of long long... 2
checking size of void *... 2

The next run might have these values:

checking size of char... 1
checking size of short... 1
checking size of int... 1
checking size of long... 4
checking size of long long... 4
checking size of void *... 4

Adding a delay (sleep 1) after each type test will result in the correct values:

checking size of char... 1
checking size of short... 2
checking size of int... 4
checking size of long... 4
checking size of long long... 8
checking size of void *... 4

I am not sure what causes this issue. My guess is that we have an issue with file caching, pipes or that the commands in the script are not executed in the correct order.

[josefwegner]

This is a very small example project.

check.zip

Unzip and just run

sh configure