diff options
| -rwxr-xr-x | configure | 14 | ||||
| -rw-r--r-- | src/internal/vis.h | 3 |
2 files changed, 14 insertions, 3 deletions
@@ -476,10 +476,18 @@ if test "x$visibility" = xauto ; then # - the -include option # - the attributes/pragmas used in vis.h # - linking code that takes the address of protected symbols +# - gcc 3.x bug that wrongly claims declarations mismatch printf "checking whether global visibility preinclude works... " -echo 'int (*fp)(void);' > "$tmpc" -echo 'int foo(void) { }' >> "$tmpc" -echo 'int bar(void) { fp = foo; return foo(); }' >> "$tmpc" +cat > "$tmpc" <<EOF +__attribute__((__visibility__("default"))) +extern struct a *const x; +typedef struct a b; +extern b *const x; +b *const x; +int (*fp)(void); +int foo(void) { } +int bar(void) { fp = foo; return foo(); } +EOF if $CC $CFLAGS_C99FSE $CPPFLAGS $CFLAGS \ -DSHARED -fPIC -I./src/internal -include vis.h \ -nostdlib -shared -Wl,-Bsymbolic-functions \ diff --git a/src/internal/vis.h b/src/internal/vis.h index a01fda18..bf7a5b20 100644 --- a/src/internal/vis.h +++ b/src/internal/vis.h @@ -12,6 +12,9 @@ * exported data symbols. */ __attribute__((__visibility__("default"))) +extern struct _IO_FILE *const stdin, *const stdout, *const stderr; + +__attribute__((__visibility__("default"))) extern int optind, opterr, optopt, optreset, __optreset, getdate_err, h_errno, daylight, __daylight, signgam, __signgam; __attribute__((__visibility__("default"))) |