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configure: fix symbol hiding usability check

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A more thorough test is done now in order to determine visibility attribute
usability, given that some compilers don't support visibility attribute on
all configurations.
This commit is contained in:
Yang Tse
2011-08-20 20:11:00 +02:00
parent f11c2c2891
commit 34d5d76969
1 changed files with 8 additions and 2 deletions
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10
m4/cares-compilers.m4
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@ -15,7 +15,7 @@
#***************************************************************************
# File version for 'aclocal' use. Keep it a single number.
# serial 67
# serial 68
dnl CARES_CHECK_COMPILER
@ -1484,12 +1484,18 @@ AC_DEFUN([CARES_CHECK_COMPILER_SYMBOL_HIDING], [
}
]],[[
char b[16];
char *r = dummy(&b);
char *r = dummy(&b[0]);
if(r)
return (int)*r;
]])
],[
supports_symbol_hiding="yes"
if test -f conftest.err; then
grep 'visibility' conftest.err >/dev/null
if test "$?" -eq "0"; then
supports_symbol_hiding="no"
fi
fi
],[
supports_symbol_hiding="no"
echo " " >&6