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configure: Expand -fvisibility checks to more compilers, test for -qvisibility

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It looks like icc and sunpro both support -fvisibility=hidden and xlc supports
-qvisibility=hidden. I tested this on AIX and solaris with their proprietary
compilers as well as gcc, and with gcc or clang on freebsd, linux, macos,
netbsd and openbsd.

Apparently my prior commit fe6a64a58a only works in combination with this
patch. While I tried to test them separately, an unknown caching issue
prevented me from noticing the problem.

Per discussion with Tom Lane and buildfarm member hoverfly.

Discussion: https://postgr.es/m/20220910052741.t7w7csyrggwus2ze%40awork3.anarazel.de
Discussion: https://postgr.es/m/20220820174213.d574qde4ptwdzoqz@awork3.anarazel.de
pull/103/head
Andres Freund 3 years ago
parent fe6a64a58a
commit be7c15b194
2 changed files with 280 additions and 159 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 400
      configure
  2. 39
      configure.ac

400
configure vendored
Unescape View File

@ -6302,154 +6302,6 @@ if test x"$pgac_cv_prog_CC_cflags__ftree_vectorize" = x"yes"; then
fi fi
#
# If the compiler knows how to hide symbols add the switch needed for that
# to CFLAGS_SL_MODULE and define HAVE_VISIBILITY_ATTRIBUTE.
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ${CC} supports -fvisibility=hidden, for CFLAGS_SL_MODULE" >&5
$as_echo_n "checking whether ${CC} supports -fvisibility=hidden, for CFLAGS_SL_MODULE... " >&6; }
if ${pgac_cv_prog_CC_cflags__fvisibility_hidden+:} false; then :
$as_echo_n "(cached) " >&6
else
pgac_save_CFLAGS=$CFLAGS
pgac_save_CC=$CC
CC=${CC}
CFLAGS="${CFLAGS_SL_MODULE} -fvisibility=hidden"
ac_save_c_werror_flag=$ac_c_werror_flag
ac_c_werror_flag=yes
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
int
main ()
{
;
return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
pgac_cv_prog_CC_cflags__fvisibility_hidden=yes
else
pgac_cv_prog_CC_cflags__fvisibility_hidden=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
ac_c_werror_flag=$ac_save_c_werror_flag
CFLAGS="$pgac_save_CFLAGS"
CC="$pgac_save_CC"
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $pgac_cv_prog_CC_cflags__fvisibility_hidden" >&5
$as_echo "$pgac_cv_prog_CC_cflags__fvisibility_hidden" >&6; }
if test x"$pgac_cv_prog_CC_cflags__fvisibility_hidden" = x"yes"; then
CFLAGS_SL_MODULE="${CFLAGS_SL_MODULE} -fvisibility=hidden"
fi
if test "$pgac_cv_prog_CC_cflags__fvisibility_hidden" = yes; then
$as_echo "#define HAVE_VISIBILITY_ATTRIBUTE 1" >>confdefs.h
fi
# For C++ we additionally want -fvisibility-inlines-hidden
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ${CXX} supports -fvisibility=hidden, for CXXFLAGS_SL_MODULE" >&5
$as_echo_n "checking whether ${CXX} supports -fvisibility=hidden, for CXXFLAGS_SL_MODULE... " >&6; }
if ${pgac_cv_prog_CXX_cxxflags__fvisibility_hidden+:} false; then :
$as_echo_n "(cached) " >&6
else
pgac_save_CXXFLAGS=$CXXFLAGS
pgac_save_CXX=$CXX
CXX=${CXX}
CXXFLAGS="${CXXFLAGS_SL_MODULE} -fvisibility=hidden"
ac_save_cxx_werror_flag=$ac_cxx_werror_flag
ac_cxx_werror_flag=yes
ac_ext=cpp
ac_cpp='$CXXCPP $CPPFLAGS'
ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
int
main ()
{
;
return 0;
}
_ACEOF
if ac_fn_cxx_try_compile "$LINENO"; then :
pgac_cv_prog_CXX_cxxflags__fvisibility_hidden=yes
else
pgac_cv_prog_CXX_cxxflags__fvisibility_hidden=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
ac_ext=c
ac_cpp='$CPP $CPPFLAGS'
ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_c_compiler_gnu
ac_cxx_werror_flag=$ac_save_cxx_werror_flag
CXXFLAGS="$pgac_save_CXXFLAGS"
CXX="$pgac_save_CXX"
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $pgac_cv_prog_CXX_cxxflags__fvisibility_hidden" >&5
$as_echo "$pgac_cv_prog_CXX_cxxflags__fvisibility_hidden" >&6; }
if test x"$pgac_cv_prog_CXX_cxxflags__fvisibility_hidden" = x"yes"; then
CXXFLAGS_SL_MODULE="${CXXFLAGS_SL_MODULE} -fvisibility=hidden"
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ${CXX} supports -fvisibility-inlines-hidden, for CXXFLAGS_SL_MODULE" >&5
$as_echo_n "checking whether ${CXX} supports -fvisibility-inlines-hidden, for CXXFLAGS_SL_MODULE... " >&6; }
if ${pgac_cv_prog_CXX_cxxflags__fvisibility_inlines_hidden+:} false; then :
$as_echo_n "(cached) " >&6
else
pgac_save_CXXFLAGS=$CXXFLAGS
pgac_save_CXX=$CXX
CXX=${CXX}
CXXFLAGS="${CXXFLAGS_SL_MODULE} -fvisibility-inlines-hidden"
ac_save_cxx_werror_flag=$ac_cxx_werror_flag
ac_cxx_werror_flag=yes
ac_ext=cpp
ac_cpp='$CXXCPP $CPPFLAGS'
ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
int
main ()
{
;
return 0;
}
_ACEOF
if ac_fn_cxx_try_compile "$LINENO"; then :
pgac_cv_prog_CXX_cxxflags__fvisibility_inlines_hidden=yes
else
pgac_cv_prog_CXX_cxxflags__fvisibility_inlines_hidden=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
ac_ext=c
ac_cpp='$CPP $CPPFLAGS'
ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_c_compiler_gnu
ac_cxx_werror_flag=$ac_save_cxx_werror_flag
CXXFLAGS="$pgac_save_CXXFLAGS"
CXX="$pgac_save_CXX"
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $pgac_cv_prog_CXX_cxxflags__fvisibility_inlines_hidden" >&5
$as_echo "$pgac_cv_prog_CXX_cxxflags__fvisibility_inlines_hidden" >&6; }
if test x"$pgac_cv_prog_CXX_cxxflags__fvisibility_inlines_hidden" = x"yes"; then
CXXFLAGS_SL_MODULE="${CXXFLAGS_SL_MODULE} -fvisibility-inlines-hidden"
fi
# #
# The following tests want to suppress various unhelpful warnings by adding # The following tests want to suppress various unhelpful warnings by adding
# -Wno-foo switches. But gcc won't complain about unrecognized -Wno-foo # -Wno-foo switches. But gcc won't complain about unrecognized -Wno-foo
@ -7005,6 +6857,258 @@ fi
fi fi
# If the compiler knows how to hide symbols, add the switch needed for that to
# CFLAGS_SL_MODULE and define HAVE_VISIBILITY_ATTRIBUTE.
#
# This is done separately from the above because -fvisibility is supported by
# quite a few different compilers, making the required repetition bothersome.
#
# We might need to add a separate test to check if
# __attribute__((visibility("hidden"))) is supported, if we encounter a
# compiler that supports one of the supported variants of -fvisibility=hidden
# but uses a different syntax to mark a symbol as exported.
if test "$GCC" = yes -o "$SUN_STUDIO_CC" = yes ; then
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ${CC} supports -fvisibility=hidden, for CFLAGS_SL_MODULE" >&5
$as_echo_n "checking whether ${CC} supports -fvisibility=hidden, for CFLAGS_SL_MODULE... " >&6; }
if ${pgac_cv_prog_CC_cflags__fvisibility_hidden+:} false; then :
$as_echo_n "(cached) " >&6
else
pgac_save_CFLAGS=$CFLAGS
pgac_save_CC=$CC
CC=${CC}
CFLAGS="${CFLAGS_SL_MODULE} -fvisibility=hidden"
ac_save_c_werror_flag=$ac_c_werror_flag
ac_c_werror_flag=yes
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
int
main ()
{
;
return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
pgac_cv_prog_CC_cflags__fvisibility_hidden=yes
else
pgac_cv_prog_CC_cflags__fvisibility_hidden=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
ac_c_werror_flag=$ac_save_c_werror_flag
CFLAGS="$pgac_save_CFLAGS"
CC="$pgac_save_CC"
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $pgac_cv_prog_CC_cflags__fvisibility_hidden" >&5
$as_echo "$pgac_cv_prog_CC_cflags__fvisibility_hidden" >&6; }
if test x"$pgac_cv_prog_CC_cflags__fvisibility_hidden" = x"yes"; then
CFLAGS_SL_MODULE="${CFLAGS_SL_MODULE} -fvisibility=hidden"
fi
# For C++ we additionally want -fvisibility-inlines-hidden
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ${CXX} supports -fvisibility=hidden, for CXXFLAGS_SL_MODULE" >&5
$as_echo_n "checking whether ${CXX} supports -fvisibility=hidden, for CXXFLAGS_SL_MODULE... " >&6; }
if ${pgac_cv_prog_CXX_cxxflags__fvisibility_hidden+:} false; then :
$as_echo_n "(cached) " >&6
else
pgac_save_CXXFLAGS=$CXXFLAGS
pgac_save_CXX=$CXX
CXX=${CXX}
CXXFLAGS="${CXXFLAGS_SL_MODULE} -fvisibility=hidden"
ac_save_cxx_werror_flag=$ac_cxx_werror_flag
ac_cxx_werror_flag=yes
ac_ext=cpp
ac_cpp='$CXXCPP $CPPFLAGS'
ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
int
main ()
{
;
return 0;
}
_ACEOF
if ac_fn_cxx_try_compile "$LINENO"; then :
pgac_cv_prog_CXX_cxxflags__fvisibility_hidden=yes
else
pgac_cv_prog_CXX_cxxflags__fvisibility_hidden=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
ac_ext=c
ac_cpp='$CPP $CPPFLAGS'
ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_c_compiler_gnu
ac_cxx_werror_flag=$ac_save_cxx_werror_flag
CXXFLAGS="$pgac_save_CXXFLAGS"
CXX="$pgac_save_CXX"
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $pgac_cv_prog_CXX_cxxflags__fvisibility_hidden" >&5
$as_echo "$pgac_cv_prog_CXX_cxxflags__fvisibility_hidden" >&6; }
if test x"$pgac_cv_prog_CXX_cxxflags__fvisibility_hidden" = x"yes"; then
CXXFLAGS_SL_MODULE="${CXXFLAGS_SL_MODULE} -fvisibility=hidden"
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ${CXX} supports -fvisibility-inlines-hidden, for CXXFLAGS_SL_MODULE" >&5
$as_echo_n "checking whether ${CXX} supports -fvisibility-inlines-hidden, for CXXFLAGS_SL_MODULE... " >&6; }
if ${pgac_cv_prog_CXX_cxxflags__fvisibility_inlines_hidden+:} false; then :
$as_echo_n "(cached) " >&6
else
pgac_save_CXXFLAGS=$CXXFLAGS
pgac_save_CXX=$CXX
CXX=${CXX}
CXXFLAGS="${CXXFLAGS_SL_MODULE} -fvisibility-inlines-hidden"
ac_save_cxx_werror_flag=$ac_cxx_werror_flag
ac_cxx_werror_flag=yes
ac_ext=cpp
ac_cpp='$CXXCPP $CPPFLAGS'
ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
int
main ()
{
;
return 0;
}
_ACEOF
if ac_fn_cxx_try_compile "$LINENO"; then :
pgac_cv_prog_CXX_cxxflags__fvisibility_inlines_hidden=yes
else
pgac_cv_prog_CXX_cxxflags__fvisibility_inlines_hidden=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
ac_ext=c
ac_cpp='$CPP $CPPFLAGS'
ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_c_compiler_gnu
ac_cxx_werror_flag=$ac_save_cxx_werror_flag
CXXFLAGS="$pgac_save_CXXFLAGS"
CXX="$pgac_save_CXX"
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $pgac_cv_prog_CXX_cxxflags__fvisibility_inlines_hidden" >&5
$as_echo "$pgac_cv_prog_CXX_cxxflags__fvisibility_inlines_hidden" >&6; }
if test x"$pgac_cv_prog_CXX_cxxflags__fvisibility_inlines_hidden" = x"yes"; then
CXXFLAGS_SL_MODULE="${CXXFLAGS_SL_MODULE} -fvisibility-inlines-hidden"
fi
have_visibility_attribute=$pgac_cv_prog_CC_cflags__fvisibility_hidden
elif test "$PORTNAME" = "aix"; then
# Note that xlc accepts -fvisibility=hidden as a file.
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ${CC} supports -qvisibility=hidden, for CFLAGS_SL_MODULE" >&5
$as_echo_n "checking whether ${CC} supports -qvisibility=hidden, for CFLAGS_SL_MODULE... " >&6; }
if ${pgac_cv_prog_CC_cflags__qvisibility_hidden+:} false; then :
$as_echo_n "(cached) " >&6
else
pgac_save_CFLAGS=$CFLAGS
pgac_save_CC=$CC
CC=${CC}
CFLAGS="${CFLAGS_SL_MODULE} -qvisibility=hidden"
ac_save_c_werror_flag=$ac_c_werror_flag
ac_c_werror_flag=yes
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
int
main ()
{
;
return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
pgac_cv_prog_CC_cflags__qvisibility_hidden=yes
else
pgac_cv_prog_CC_cflags__qvisibility_hidden=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
ac_c_werror_flag=$ac_save_c_werror_flag
CFLAGS="$pgac_save_CFLAGS"
CC="$pgac_save_CC"
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $pgac_cv_prog_CC_cflags__qvisibility_hidden" >&5
$as_echo "$pgac_cv_prog_CC_cflags__qvisibility_hidden" >&6; }
if test x"$pgac_cv_prog_CC_cflags__qvisibility_hidden" = x"yes"; then
CFLAGS_SL_MODULE="${CFLAGS_SL_MODULE} -qvisibility=hidden"
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ${CXX} supports -qvisibility=hidden, for CXXFLAGS_SL_MODULE" >&5
$as_echo_n "checking whether ${CXX} supports -qvisibility=hidden, for CXXFLAGS_SL_MODULE... " >&6; }
if ${pgac_cv_prog_CXX_cxxflags__qvisibility_hidden+:} false; then :
$as_echo_n "(cached) " >&6
else
pgac_save_CXXFLAGS=$CXXFLAGS
pgac_save_CXX=$CXX
CXX=${CXX}
CXXFLAGS="${CXXFLAGS_SL_MODULE} -qvisibility=hidden"
ac_save_cxx_werror_flag=$ac_cxx_werror_flag
ac_cxx_werror_flag=yes
ac_ext=cpp
ac_cpp='$CXXCPP $CPPFLAGS'
ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
int
main ()
{
;
return 0;
}
_ACEOF
if ac_fn_cxx_try_compile "$LINENO"; then :
pgac_cv_prog_CXX_cxxflags__qvisibility_hidden=yes
else
pgac_cv_prog_CXX_cxxflags__qvisibility_hidden=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
ac_ext=c
ac_cpp='$CPP $CPPFLAGS'
ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_c_compiler_gnu
ac_cxx_werror_flag=$ac_save_cxx_werror_flag
CXXFLAGS="$pgac_save_CXXFLAGS"
CXX="$pgac_save_CXX"
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $pgac_cv_prog_CXX_cxxflags__qvisibility_hidden" >&5
$as_echo "$pgac_cv_prog_CXX_cxxflags__qvisibility_hidden" >&6; }
if test x"$pgac_cv_prog_CXX_cxxflags__qvisibility_hidden" = x"yes"; then
CXXFLAGS_SL_MODULE="${CXXFLAGS_SL_MODULE} -qvisibility=hidden"
fi
have_visibility_attribute=$pgac_cv_prog_CC_cflags__qvisibility_hidden
fi
if test "$have_visibility_attribute" = "yes"; then
$as_echo "#define HAVE_VISIBILITY_ATTRIBUTE 1" >>confdefs.h
fi

39
configure.ac
Unescape View File

@ -525,17 +525,6 @@ if test "$GCC" = yes -a "$ICC" = no; then
# Optimization flags for specific files that benefit from vectorization # Optimization flags for specific files that benefit from vectorization
PGAC_PROG_CC_VAR_OPT(CFLAGS_VECTORIZE, [-ftree-vectorize]) PGAC_PROG_CC_VAR_OPT(CFLAGS_VECTORIZE, [-ftree-vectorize])
# #
# If the compiler knows how to hide symbols add the switch needed for that
# to CFLAGS_SL_MODULE and define HAVE_VISIBILITY_ATTRIBUTE.
PGAC_PROG_CC_VAR_OPT(CFLAGS_SL_MODULE, [-fvisibility=hidden])
if test "$pgac_cv_prog_CC_cflags__fvisibility_hidden" = yes; then
AC_DEFINE([HAVE_VISIBILITY_ATTRIBUTE], 1,
[Define to 1 if your compiler knows the visibility("hidden") attribute.])
fi
# For C++ we additionally want -fvisibility-inlines-hidden
PGAC_PROG_VARCXX_VARFLAGS_OPT(CXX, CXXFLAGS_SL_MODULE, [-fvisibility=hidden])
PGAC_PROG_VARCXX_VARFLAGS_OPT(CXX, CXXFLAGS_SL_MODULE, [-fvisibility-inlines-hidden])
#
# The following tests want to suppress various unhelpful warnings by adding # The following tests want to suppress various unhelpful warnings by adding
# -Wno-foo switches. But gcc won't complain about unrecognized -Wno-foo # -Wno-foo switches. But gcc won't complain about unrecognized -Wno-foo
# switches, so we have to test for the positive form and if that works, # switches, so we have to test for the positive form and if that works,
@ -582,6 +571,34 @@ elif test "$PORTNAME" = "aix"; then
PGAC_PROG_CXX_CFLAGS_OPT([-qlonglong]) PGAC_PROG_CXX_CFLAGS_OPT([-qlonglong])
fi fi
# If the compiler knows how to hide symbols, add the switch needed for that to
# CFLAGS_SL_MODULE and define HAVE_VISIBILITY_ATTRIBUTE.
#
# This is done separately from the above because -fvisibility is supported by
# quite a few different compilers, making the required repetition bothersome.
#
# We might need to add a separate test to check if
# __attribute__((visibility("hidden"))) is supported, if we encounter a
# compiler that supports one of the supported variants of -fvisibility=hidden
# but uses a different syntax to mark a symbol as exported.
if test "$GCC" = yes -o "$SUN_STUDIO_CC" = yes ; then
PGAC_PROG_CC_VAR_OPT(CFLAGS_SL_MODULE, [-fvisibility=hidden])
# For C++ we additionally want -fvisibility-inlines-hidden
PGAC_PROG_VARCXX_VARFLAGS_OPT(CXX, CXXFLAGS_SL_MODULE, [-fvisibility=hidden])
PGAC_PROG_VARCXX_VARFLAGS_OPT(CXX, CXXFLAGS_SL_MODULE, [-fvisibility-inlines-hidden])
have_visibility_attribute=$pgac_cv_prog_CC_cflags__fvisibility_hidden
elif test "$PORTNAME" = "aix"; then
# Note that xlc accepts -fvisibility=hidden as a file.
PGAC_PROG_CC_VAR_OPT(CFLAGS_SL_MODULE, [-qvisibility=hidden])
PGAC_PROG_VARCXX_VARFLAGS_OPT(CXX, CXXFLAGS_SL_MODULE, [-qvisibility=hidden])
have_visibility_attribute=$pgac_cv_prog_CC_cflags__qvisibility_hidden
fi
if test "$have_visibility_attribute" = "yes"; then
AC_DEFINE([HAVE_VISIBILITY_ATTRIBUTE], 1,
[Define to 1 if your compiler knows the visibility("hidden") attribute.])
fi
AC_SUBST(CFLAGS_UNROLL_LOOPS) AC_SUBST(CFLAGS_UNROLL_LOOPS)
AC_SUBST(CFLAGS_VECTORIZE) AC_SUBST(CFLAGS_VECTORIZE)
AC_SUBST(CFLAGS_SL_MODULE) AC_SUBST(CFLAGS_SL_MODULE)

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