Xavier de Gaye added the comment:

> I am still curious what configures the preprocessor to set __ARM_ARCH to 7 (I 
> guess the clang -target argument?)
Yes, the -target clang argument or the -march gcc argument.

> and why we can’t set LDFLAGS at the same time or place. Is it just more 
> convenient this way?
I don't understand the question. LDFLAGS is set at the time we know that 
__ARM_ARCH is 7, just after the preprocessing is done. Would you set it 
elsewhere ?
LDFLAGS is set in configure.ac with always this same idiom: LDFLAGS="$LDFLAGS 
new_options..." and this setting is done in what seems to be random places in 
CCSHARED is set in one case statement.


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