make configure check for visibility preinclude compatible with pcc

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pcc does not search for -include relative to the working directory
unless -I. is used. rather than adding -I., which could be problematic
if there's extra junk in the top-level directory, switch back to the
old method (reverting commit 60ed988fd6)
of using -include vis.h and relying on -I./src/internal being present
on the command line (which the Makefile guarantees). to fix the
breakage that was present in trycppif checks with the old method,
$CFLAGS_AUTO is removed from the command line passed to trycppif; this
is valid since $CFLAGS_AUTO should not contain options that alter
compiler semantics or ABI, only optimizations, warnings, etc.

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This commit is contained in:

Rich Felker 2015-04-22 01:41:00 -04:00

parent 873e0ec7fc

commit 428462a4c3

1 changed files with 3 additions and 3 deletions

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