Hi,
I'm encountering a problem building icu4c-3.8 on this system, with both
self-built GNU-as and gcc:
* i386-pc-solaris2.10
* gcc-4.1.1
* GNU as (both 2.16.1 and 2.18)
* native ld
Must admit that I have not tried using /usr/sfw/bin/gas (2.15).
Here's a testcase:
$ cat solaris-visibility.c
struct A;
typedef int (*F)(struct A*);
extern const struct A a;
struct A { F f; };
static int f(struct A* x) { return (x==&a); }
const struct A a = { f };
This breaks when creating a shared library with optimization and
-fvisibility=hidden:
$ gcc -shared -fvisibility=hidden -fPIC -O2 solaris-visibility.c -o lib.so
solaris-visibility.c:6: warning: visibility attribute not supported in this configuration; ignored
ld: fatal: relocation error: R_386_GOTOFF: file /var/tmp//ccmV6dnn.o: symbol a: relocation must bind locally
collect2: ld returned 1 exit status
When gcc warns the visibility attribute is ignored, why does it make a
difference then (with optimization only) ?
Without optimization, it works:
$ gcc -shared -fvisibility=hidden -fPIC solaris-visibility.c -o lib.so
solaris-visibility.c:6: warning: visibility attribute not supported in this configuration; ignored
Works without -fvisibility=hidden but optimization:
$ gcc -shared -fPIC -O2 solaris-visibility.c -o lib.so
This is how I configured gcc:
$ gcc -v
Using built-in specs.
Target: i386-pc-solaris2.10
Configured with: /source/gcc-4.1.1/configure
--enable-threads=posix --disable-multilib --with-gnu-as
--with-as=/prefix/i386-pc-solaris2.10/bin/as --without-gnu-ld
--with-local-prefix=/prefix --disable-nls --disable-static
--disable-dependency-tracking --prefix=/prefix
Thread model: posix
gcc version 4.1.1
Thank you!
/haubi/
