Hello, This patch is a proposal to add an if-exists-then-else builtin spec function, which tests for the existence of a file and returns one or the other of the following arguments depending on the result of the test.
This differs from the existing if-exists or
if-exists-else function which return the name of the
tested file if it exists.
This new function is of help to a forthcoming change for
VxWorks where we check for the presence of a specific header
file to decide the name of a library to include in the link
closure, like:
#define VXWORKS_NET_LIBS_RTP "-l%:if-exists-then-else(%:getenv(VSB_DIR
/usr/h/public/rtnetStackLib.h) rtnet net)"
We have been using this for months in nightly gcc-9 based
compilers for numerous targets. It passes a build + local test sequence
with gcc-10 for powerpc-vxworks7r2 and a sanity check build with
a recent mainline.
Is this ok to commit ?
Thanks a lot in advance,
With Kind Regards,
Olivier
2020-10-01 Douglas Rupp <r...@adacore.com>
* gcc.c (if-exists-then-else): New built-in spec function.
0013-Add-a-if-exists-then-else-built-in-spec-function.diff
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