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build: avoid stdin stall with GNU AS probing.

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a758c5e added probing for various tools, such as AS. Unfortunately, GNU
AS is reading stdin with -v, and thus configure is stalled with
configure arguments such as --as=as.

Fixes Ticket #1898.
This commit is contained in:
Clément Bœsch 2013-11-08 23:55:06 +01:00
parent eb7f7b797f
commit dbb41f93c1
1 changed files with 3 additions and 1 deletions
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4
configure vendored
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@ -2889,7 +2889,9 @@ probe_cc(){
unset _depflags _DEPCMD _DEPFLAGS
_flags_filter=echo
if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
if $_cc --version 2>&1 | grep -q '^GNU assembler'; then
true # no-op to avoid reading stdin in following checks
elif $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
_type=llvm_gcc
gcc_extra_ver=$(expr "$($_cc --version | head -n1)" : '.*\((.*)\)')
_ident="llvm-gcc $($_cc -dumpversion) $gcc_extra_ver"