pragma weak ignoring more than 1 alias when placed before the declaration · Issue #28985 · llvm/llvm-project (original) (raw)

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Description

Bugzilla Link	28611
Version	trunk
OS	Linux
Reporter	LLVM Bugzilla Contributor
CC	@hfinkel

Extended Description

cat a.c
#pragma weak a = bad
#pragma weak b = bad
#pragma weak c = bad
void bad(int *info ) { *info = 0 ; }

clang a.c -c
readelf -sW a.o
Num: Value Size Type Bind Vis Ndx Name
0: 0000000000000000 0 NOTYPE LOCAL DEFAULT UND
1: 0000000000000000 0 FILE LOCAL DEFAULT ABS a.c
2: 0000000000000000 32 FUNC WEAK DEFAULT 2 a
3: 0000000000000000 32 FUNC GLOBAL DEFAULT 2 bad

Note that, the symbol b and c are missing.

This is gcc behavior:
8: 0000000000000000 52 FUNC GLOBAL DEFAULT 1 bad
9: 0000000000000000 52 FUNC WEAK DEFAULT 1 a
10: 0000000000000000 52 FUNC WEAK DEFAULT 1 b
11: 0000000000000000 52 FUNC WEAK DEFAULT 1 c