Hi,
On 2022-07-27 14:02:28 -0400, Tom Lane wrote:
> Andres Freund <and...@anarazel.de> writes:
> > On 2022-07-18 00:05:16 -0700, Andres Freund wrote:
> >> Given that that's just about all compilers we support using configure,
> >> perhaps
> >> we should just move that out of the compiler specific section? Doesn't look
> >> like there's much precedent for that so far...
>
> > Here's a potential patch along those lines.
>
> Now that the dust from the main patch is pretty well settled, +1
> for trying that.
Here's an updated patch for this (also shared recently on another thread). I
was wrong earlier saying that -fvisibility works for xlc - it is accepted, but
just as some sort of input file. We do need -qvisibility.
I tested it on aix and solaris, both with gcc and their proprietary compilers
and confirmed that it indeed does reduce the number of exposed symbols.
I also attached the aix patch to not use mkldexport for extension anymore, as
I tested the patches in that order. I plan to push the aix one as soon as as
hoverfly and sungazer ran once after e5484554ba9.
> > I wonder if we also should move the -fno-strict-aliasing, -fwrapv tests
> > out. But that'd be something for later.
>
> Those seem less likely to be portable to non-gcc-alike compilers.
> On the other hand, maybe it'd be interesting to just remove the
> conditionality temporarily and try ALL the switches on all compilers,
> just to see what we can learn from the buildfarm.
Unfortunately, given the discovery of xlc accepting -f... silently that's
probably not feasible. We'd have to make it at least conditional on not being
xlc. Everything else we support does seem to be ok with -fxxx flags.
Greetings,
Andres Freund
>From d00dbc2188893a0f0f6b533aaee5733a22568527 Mon Sep 17 00:00:00 2001
From: Andres Freund <and...@anarazel.de>
Date: Sat, 20 Aug 2022 08:43:28 -0700
Subject: [PATCH v5 1/2] aix: No need to use mkldexport when we want to export
all symbols
When building a shared library with an exports.txt there's no need to build an
intermediary static library, we can just pass -Wl,-bE:... when generating the
.so.
When building a shared library without an exports.txt, there's no need to call
mkldexport.sh to export all symbols, because all symbols are exported anyway,
and we don't need the export file on the import side (like we do for
postgres.imp).
This makes building .so's on aix a lot more similar to building on other
platforms. In particular, we don't create and remove a .a of the same name but
different contents anymore.
---
src/makefiles/Makefile.aix | 8 ++-----
src/Makefile.shlib | 45 +++++++++++++++-----------------------
2 files changed, 20 insertions(+), 33 deletions(-)
diff --git a/src/makefiles/Makefile.aix b/src/makefiles/Makefile.aix
index 9408c1e2913..56d7f22aff6 100644
--- a/src/makefiles/Makefile.aix
+++ b/src/makefiles/Makefile.aix
@@ -38,9 +38,5 @@ endif
MKLDEXPORT_DIR=src/backend/port/aix
MKLDEXPORT=$(top_srcdir)/$(MKLDEXPORT_DIR)/mkldexport.sh
-%.exp: %.o
- $(MKLDEXPORT) $^ >$@
-
-# Rule for building a shared library from a single .o file
-%$(DLSUFFIX): %.o %.exp
- $(CC) $(CFLAGS) $*.o $(LDFLAGS) $(LDFLAGS_SL) -o $@ -Wl,-bE:$*.exp $(BE_DLLLIBS)
+%$(DLSUFFIX): %.o
+ $(CC) $(CFLAGS) $*.o $(LDFLAGS) $(LDFLAGS_SL) -o $@ $(BE_DLLLIBS)
diff --git a/src/Makefile.shlib b/src/Makefile.shlib
index 1e09ab8ea62..db466b3b845 100644
--- a/src/Makefile.shlib
+++ b/src/Makefile.shlib
@@ -107,12 +107,17 @@ override CPPFLAGS += -DSO_MAJOR_VERSION=$(SO_MAJOR_VERSION)
endif
ifeq ($(PORTNAME), aix)
+ LINK.shared = $(COMPILER)
ifdef SO_MAJOR_VERSION
shlib = lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION)
endif
haslibarule = yes
# $(exports_file) is also usable as an import file
exports_file = lib$(NAME).exp
+ BUILD.exports = ( echo '\#! $(shlib)'; $(AWK) '/^[^\#]/ {printf "%s\n",$$1}' $< ) > $@
+ ifneq (,$(SHLIB_EXPORTS))
+ LINK.shared += -Wl,-bE:$(exports_file)
+ endif
endif
ifeq ($(PORTNAME), darwin)
@@ -259,9 +264,15 @@ $(stlib): $(OBJS) | $(SHLIB_PREREQS)
touch $@
endif #haslibarule
+# AIX wraps shared libraries inside a static library, can be used both
+# for static and shared linking
+ifeq ($(PORTNAME), aix)
+$(stlib): $(shlib)
+ rm -f $(stlib)
+ $(AR) $(AROPT) $(stlib) $(shlib)
+endif # aix
ifeq (,$(filter cygwin win32,$(PORTNAME)))
-ifneq ($(PORTNAME), aix)
# Normal case
$(shlib): $(OBJS) | $(SHLIB_PREREQS)
@@ -274,9 +285,12 @@ ifneq ($(shlib), $(shlib_major))
endif
# Make sure we have a link to a name without any version numbers
ifneq ($(shlib), $(shlib_bare))
+# except on AIX, where that's not a thing
+ifneq ($(PORTNAME), aix)
rm -f $(shlib_bare)
$(LN_S) $(shlib) $(shlib_bare)
-endif
+endif # aix
+endif # shlib_bare
endif # shlib_major
# Where possible, restrict the symbols exported by the library to just the
@@ -285,36 +299,13 @@ endif # shlib_major
# libpgport along with libpq.
ifneq (,$(SHLIB_EXPORTS))
ifdef BUILD.exports
-$(shlib): $(SHLIB_EXPORTS:%.txt=%.list)
+$(shlib): $(exports_file)
-$(SHLIB_EXPORTS:%.txt=%.list): %.list: %.txt
+$(exports_file): $(SHLIB_EXPORTS)
$(BUILD.exports)
endif
endif
-else # PORTNAME == aix
-
-# AIX case
-
-# See notes in src/backend/parser/Makefile about the following two rules
-$(stlib): $(shlib)
- touch $@
-
-$(shlib): $(OBJS) | $(SHLIB_PREREQS)
- rm -f $(stlib)
- $(LINK.static) $(stlib) $^
- $(RANLIB) $(stlib)
-ifeq (,$(SHLIB_EXPORTS))
- $(MKLDEXPORT) $(stlib) $(shlib) >$(exports_file)
-else
- ( echo '#! $(shlib)'; $(AWK) '/^[^#]/ {printf "%s\n",$$1}' ${srcdir}/$(SHLIB_EXPORTS) ) >$(exports_file)
-endif
- $(COMPILER) -o $(shlib) $(stlib) -Wl,-bE:$(exports_file) $(LDFLAGS) $(LDFLAGS_SL) $(SHLIB_LINK)
- rm -f $(stlib)
- $(AR) $(AROPT) $(stlib) $(shlib)
-
-endif # PORTNAME == aix
-
else # PORTNAME == cygwin || PORTNAME == win32
ifeq ($(PORTNAME), cygwin)
--
2.37.0.3.g30cc8d0f14
>From 4a3eef98c0f0fb5b4b272525fa544973fe3a2eaa Mon Sep 17 00:00:00 2001
From: Andres Freund <and...@anarazel.de>
Date: Thu, 1 Sep 2022 14:10:07 -0700
Subject: [PATCH v5 2/2] configure: Expand -fvisibility checks to more
compilers, test for -qvisibility
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.
---
configure | 398 ++++++++++++++++++++++++++++++++-------------------
configure.ac | 37 +++--
2 files changed, 276 insertions(+), 159 deletions(-)
diff --git a/configure b/configure
index a268780c5db..68811612d38 100755
--- a/configure
+++ b/configure
@@ -6302,154 +6302,6 @@ if test x"$pgac_cv_prog_CC_cflags__ftree_vectorize" = x"yes"; then
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="${CXXFLAGS_SL_MODULE} -fvisibility-inlines-hidden"
-fi
-
#
# The following tests want to suppress various unhelpful warnings by adding
# -Wno-foo switches. But gcc won't complain about unrecognized -Wno-foo
@@ -7005,6 +6857,256 @@ fi
fi
+# If the compiler knows how to hide symbols, add the switch needed for that to
+# CFLAGS_SL_MODULE and define HAVE_VISIBILITY_ATTRIBUTE.
+#
+# This is done separately from the above because -fvisibility is supported by
+# quite a few different compilers, making the required repetition bothersome.
+#
+# We might need to add a separate test to check if
+# __attribute__((visibility("hidden"))) is supported, if we encounter a
+# compiler that supports one of the supported variants of -fvisibility=hidden
+# but uses a different syntax to mark a symbol as exported.
+if test "$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="${CXXFLAGS_SL_MODULE} -fvisibility-inlines-hidden"
+fi
+
+elif test "$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="${CXXFLAGS_SL_MODULE} -qvisibility=hidden"
+fi
+
+fi
+
+if test -n "${CFLAGS_SL_MODULE}"; then
+
+$as_echo "#define HAVE_VISIBILITY_ATTRIBUTE 1" >>confdefs.h
+
+fi
+
diff --git a/configure.ac b/configure.ac
index 993b5d5cb0a..6f041a6dd2e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -525,17 +525,6 @@ if test "$GCC" = yes -a "$ICC" = no; then
# Optimization flags for specific files that benefit from vectorization
PGAC_PROG_CC_VAR_OPT(CFLAGS_VECTORIZE, [-ftree-vectorize])
#
- # If the compiler knows how to hide symbols add the switch needed for that
- # to CFLAGS_SL_MODULE and define HAVE_VISIBILITY_ATTRIBUTE.
- PGAC_PROG_CC_VAR_OPT(CFLAGS_SL_MODULE, [-fvisibility=hidden])
- if test "$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
# -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,
@@ -582,6 +571,32 @@ elif test "$PORTNAME" = "aix"; then
PGAC_PROG_CXX_CFLAGS_OPT([-qlonglong])
fi
+# If the compiler knows how to hide symbols, add the switch needed for that to
+# CFLAGS_SL_MODULE and define HAVE_VISIBILITY_ATTRIBUTE.
+#
+# This is done separately from the above because -fvisibility is supported by
+# quite a few different compilers, making the required repetition bothersome.
+#
+# We might need to add a separate test to check if
+# __attribute__((visibility("hidden"))) is supported, if we encounter a
+# compiler that supports one of the supported variants of -fvisibility=hidden
+# but uses a different syntax to mark a symbol as exported.
+if test "$GCC" = yes -o "$SUN_STUDIO_CC" = yes ; then
+ PGAC_PROG_CC_VAR_OPT(CFLAGS_SL_MODULE, [-fvisibility=hidden])
+ # For C++ we additionally want -fvisibility-inlines-hidden
+ PGAC_PROG_VARCXX_VARFLAGS_OPT(CXX, CXXFLAGS_SL_MODULE, [-fvisibility=hidden])
+ PGAC_PROG_VARCXX_VARFLAGS_OPT(CXX, CXXFLAGS_SL_MODULE, [-fvisibility-inlines-hidden])
+elif test "$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])
+fi
+
+if test -n "${CFLAGS_SL_MODULE}"; 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_VECTORIZE)
AC_SUBST(CFLAGS_SL_MODULE)
--
2.37.0.3.g30cc8d0f14
