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cares-compilers.m4: double underscore decoration for visibility attribute

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This commit is contained in:
Yang Tse
2012-04-17 12:57:09 +02:00
parent fc2c91c206
commit f6b4cacfae
1 changed files with 5 additions and 5 deletions
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10
m4/cares-compilers.m4
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@ -1,6 +1,6 @@
#***************************************************************************
#
# Copyright (C) 2009-2011 by Daniel Stenberg et al
# Copyright (C) 2009-2012 by Daniel Stenberg et al
#
# Permission to use, copy, modify, and distribute this software and its
# documentation for any purpose and without fee is hereby granted, provided
@ -15,7 +15,7 @@
#***************************************************************************
# File version for 'aclocal' use. Keep it a single number.
# serial 68
# serial 69
dnl CARES_CHECK_COMPILER
@ -1425,7 +1425,7 @@ AC_DEFUN([CARES_CHECK_COMPILER_SYMBOL_HIDING], [
case "$compiler_id" in
CLANG)
dnl All versions of clang support -fvisibility=
tmp_EXTERN="__attribute__ ((visibility (\"default\")))"
tmp_EXTERN="__attribute__ ((__visibility__ (\"default\")))"
tmp_CFLAGS="-fvisibility=hidden"
supports_symbol_hiding="yes"
;;
@ -1433,7 +1433,7 @@ AC_DEFUN([CARES_CHECK_COMPILER_SYMBOL_HIDING], [
dnl Only gcc 3.4 or later
if test "$compiler_num" -ge "304"; then
if $CC --help --verbose 2>&1 | grep fvisibility= > /dev/null ; then
tmp_EXTERN="__attribute__ ((visibility (\"default\")))"
tmp_EXTERN="__attribute__ ((__visibility__ (\"default\")))"
tmp_CFLAGS="-fvisibility=hidden"
supports_symbol_hiding="yes"
fi
@ -1452,7 +1452,7 @@ AC_DEFUN([CARES_CHECK_COMPILER_SYMBOL_HIDING], [
printf("icc fvisibility bug test");
]])
],[
tmp_EXTERN="__attribute__ ((visibility (\"default\")))"
tmp_EXTERN="__attribute__ ((__visibility__ (\"default\")))"
tmp_CFLAGS="-fvisibility=hidden"
supports_symbol_hiding="yes"
])