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Add --Bsymbolic-non-weak and --Bsymbolic-non-weak-functions
GNU ld doesn't support these options, but LLVM lld do.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,42 @@ | ||
| #!/bin/bash | ||
| . $(dirname $0)/common.inc | ||
|
|
||
| cat <<EOF | $CC -c -o $t/a.o -fPIC -xc - | ||
| __attribute__((weak)) int foo = 4; | ||
| int bar = 4; | ||
| __attribute__((weak)) int baz = 4; | ||
| int get_foo1() { return foo; } | ||
| int get_bar1() { return bar; } | ||
| __attribute__((weak)) int get_baz1() { return baz; } | ||
| int get_foo2() { return get_foo1(); } | ||
| int get_bar2() { return get_bar1(); } | ||
| int get_baz2() { return get_baz1(); } | ||
| EOF | ||
|
|
||
| $CC -B. -shared -o $t/b.so $t/a.o -Wl,-Bsymbolic-non-weak-functions | ||
|
|
||
| cat <<EOF | $CC -c -o $t/c.o -xc - | ||
| #include <stdio.h> | ||
| int foo = 3; | ||
| int bar = 3; | ||
| int baz = 3; | ||
| int get_foo1() { return 7; } | ||
| int get_bar1() { return 7; } | ||
| int get_baz1() { return 7; } | ||
| int get_foo2(); | ||
| int get_bar2(); | ||
| int get_baz2(); | ||
| int main() { | ||
| printf("%d %d %d %d %d %d\n", foo, bar, baz, | ||
| get_foo2(), get_bar2(), get_baz2()); | ||
| } | ||
| EOF | ||
|
|
||
| $CC -B. -o $t/exe $t/c.o $t/b.so | ||
| $QEMU $t/exe | grep -q '^3 3 3 3 3 7$' |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,42 @@ | ||
| #!/bin/bash | ||
| . $(dirname $0)/common.inc | ||
|
|
||
| cat <<EOF | $CC -c -o $t/a.o -fPIC -xc - | ||
| __attribute__((weak)) int foo = 4; | ||
| int bar = 4; | ||
| __attribute__((weak)) int baz = 4; | ||
| int get_foo1() { return foo; } | ||
| int get_bar1() { return bar; } | ||
| __attribute__((weak)) int get_baz1() { return baz; } | ||
| int get_foo2() { return get_foo1(); } | ||
| int get_bar2() { return get_bar1(); } | ||
| int get_baz2() { return get_baz1(); } | ||
| EOF | ||
|
|
||
| $CC -B. -shared -o $t/b.so $t/a.o -Wl,-Bsymbolic-non-weak | ||
|
|
||
| cat <<EOF | $CC -c -o $t/c.o -xc - | ||
| #include <stdio.h> | ||
| int foo = 3; | ||
| int bar = 3; | ||
| int baz = 3; | ||
| int get_foo1() { return 7; } | ||
| int get_bar1() { return 7; } | ||
| int get_baz1() { return 7; } | ||
| int get_foo2(); | ||
| int get_bar2(); | ||
| int get_baz2(); | ||
| int main() { | ||
| printf("%d %d %d %d %d %d\n", foo, bar, baz, | ||
| get_foo2(), get_bar2(), get_baz2()); | ||
| } | ||
| EOF | ||
|
|
||
| $CC -B. -o $t/exe $t/c.o $t/b.so | ||
| $QEMU $t/exe | grep -q '^3 3 3 3 4 7$' |