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configure: fix symbol prefix detection

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The symbol prefix check would incorrectly detect a bogus prefix in
circumstances where sanitizers instrument the build, like when
configuring with the clang-asan toolchain where it would detect the
prefix as __odr_asan_gen_, which is obviously wrong.

To fix this, adjust the prefix detection to only detect a
one-character prefix, which is the only case that matters
anywhere right now.
This commit is contained in:
Marvin Scholz 2024-09-11 23:09:34 +02:00
parent 0c9fe2b232
commit 910bf33879
1 changed files with 3 additions and 1 deletions
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4
configure vendored
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@ -6137,9 +6137,11 @@ enabled pic && enable_weak_pic
test_cc <<EOF || die "Symbol mangling check failed."
int ff_extern;
EOF
sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
sym=$($nm $TMPO | awk '/[ \t]+[^ \t]{0,1}ff_extern$/{ print substr($0, match($0, /[^ \t]{0,1}ff_extern$/)) }')
extern_prefix=${sym%%ff_extern*}
log "Symbol prefix detected as: '${extern_prefix}'"
! disabled inline_asm && check_inline_asm inline_asm '"" ::'
check_cc pragma_deprecated "" '_Pragma("GCC diagnostic push") _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"")'