From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp2.wavenetuk.net (unknown [195.26.37.10]) by sourceware.org (Postfix) with ESMTP id 24EE03857C4C; Mon, 23 Nov 2020 20:02:09 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 24EE03857C4C Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=sandoe.co.uk Authentication-Results: sourceware.org; spf=none smtp.mailfrom=iain@sandoe.co.uk Received: from [192.168.1.212] (host81-138-1-83.in-addr.btopenworld.com [81.138.1.83]) by smtp2.wavenetuk.net (Postfix) with ESMTPA id 305286001DA; Mon, 23 Nov 2020 20:02:08 +0000 (GMT) From: Iain Sandoe Content-Type: multipart/mixed; boundary="Apple-Mail=_FCBE7756-B122-4E71-BA79-B5348EE5B1DF" Mime-Version: 1.0 (Mac OS X Mail 10.3 \(3273\)) Subject: [PATCH 1,2] Darwin : Update libtool and dependencies for Darwin20 [PR97865] Message-Id: Date: Mon, 23 Nov 2020 20:01:58 +0000 Cc: Jeff Law , Jonathan Wakely To: GCC Patches , libstdc++ X-Mailer: Apple Mail (2.3273) X-Spam-Status: No, score=-14.6 required=5.0 tests=BAYES_00, GIT_PATCH_0, KAM_COUK, KAM_DMARC_STATUS, KAM_LAZY_DOMAIN_SECURITY, KHOP_HELO_FCRDNS, MAY_BE_FORGED, SPF_HELO_NONE, SPF_NONE, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: libstdc++@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libstdc++ mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 23 Nov 2020 20:02:14 -0000 --Apple-Mail=_FCBE7756-B122-4E71-BA79-B5348EE5B1DF Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=utf-8; delsp=yes; format=flowed Hi This fixes a blocker for x86_64 darwin20 (a.k.a macOS 11) It is needed on all open branches too. (probably this comes under my Dariwn hat - but since it involves regenerating all the configure scripts… I’d welcome another pair of eyes) tested on: darwin8-darwin20, powerpc, i686, x86_64, arm64(aarch64). aix (cfarm gcc119), aarch64 (cfarm gcc115), powerpc64 (BE) - (cfarm gcc110) powerpc64 (LE) - (cfarm gcc135), sparc solaris 2.11 (gcc211) x86_64-linux-gnu (cfarm gcc123) OK for master? OK for backports? thanks iain N.B. I am attaching the second patch which is the uninteresting regenerated files. ===== The change in major version (and the increment from Darwin19 to 20) caused libtool tests to fail which resulted in incorrect build settings for shared libraries. We take this opportunity to sort out the shared undefined symbols state rather than propagating the current unsound behaviour into a new rev. This change means that we default to the case that missing symbols are considered an error, and if one wants to allow this intentionally, the confiuration for that case should be set appropriately. We use intentional missing symbols to emulate the ELF behaviour when we have a weak undefined extern. So, three existing cases need undefined dynamic lookup: libitm, where there is already a configuration mechanism to add the flags. libsanitizer, likewise libcc1, where we add simple configuration to add the flags for Darwin. libcc1/ChangeLog: PR target/97865 * Makefile.am: Add dynamic_lookup to LD flags for Darwin. * configure.ac: Test for Darwin host and set a flag. libitm/ChangeLog: PR target/97865 * configure.tgt: Add dynamic_lookup to XLDFLAGS for Darwin. libsanitizer/ChangeLog: PR target/97865 * configure.tgt: Add dynamic_lookup to EXTRA_CXXFLAGS for Darwin. ChangeLog: PR target/97865 * libtool.m4: Update handling of Darwin platform link flags for Darwin20. --- libcc1/Makefile.am | 3 +++ libcc1/configure.ac | 6 ++++++ libitm/configure.tgt | 9 ++++++++- libsanitizer/configure.tgt | 1 + libtool.m4 | 32 +++++++++++++++++--------------- 5 files changed, 35 insertions(+), 16 deletions(-) diff --git a/libcc1/Makefile.am b/libcc1/Makefile.am index ab6f839ecae..173b84f9cdb 100644 --- a/libcc1/Makefile.am +++ b/libcc1/Makefile.am @@ -25,6 +25,9 @@ CPPFLAGS_FOR_C_FAMILY = -I $(srcdir)/../gcc/c-family \ CPPFLAGS_FOR_C = $(CPPFLAGS_FOR_C_FAMILY) -I $(srcdir)/../gcc/c CPPFLAGS_FOR_CXX = $(CPPFLAGS_FOR_C_FAMILY) -I $(srcdir)/../gcc/cp AM_CXXFLAGS = $(WARN_FLAGS) $(WERROR) $(visibility) $(CET_HOST_FLAGS) +if DARWIN_DYNAMIC_LOOKUP +AM_CXXFLAGS += -Wl,-undefined,dynamic_lookup +endif override CXXFLAGS := $(filter-out -fsanitize=address,$(CXXFLAGS)) override LDFLAGS := $(filter-out -fsanitize=address,$(LDFLAGS)) # Can be simplified when libiberty becomes a normal convenience library. diff --git a/libcc1/configure.ac b/libcc1/configure.ac index 8d3b8d14748..262e0a61e6f 100644 --- a/libcc1/configure.ac +++ b/libcc1/configure.ac @@ -104,6 +104,12 @@ AC_CACHE_CHECK([for socket libraries], libcc1_cv_lib_sockets, ]) LIBS="$LIBS $libcc1_cv_lib_sockets" +case "$host" in + *-*-darwin*) darwin_dynamic_lookup=yes ;; + *) darwin_dynamic_lookup= ;; +esac +AM_CONDITIONAL(DARWIN_DYNAMIC_LOOKUP, test $darwin_dynamic_lookup = yes) + # If any of these functions are missing, simply don't bother building # this plugin. GCC_ENABLE_PLUGINS diff --git a/libitm/configure.tgt b/libitm/configure.tgt index 04109160e91..d1beb5c9ec8 100644 --- a/libitm/configure.tgt +++ b/libitm/configure.tgt @@ -43,6 +43,7 @@ if test "$gcc_cv_have_tls" = yes ; then *-*-linux*) XCFLAGS="${XCFLAGS} -ftls-model=initial-exec" ;; + esac fi @@ -144,10 +145,16 @@ case "${target}" in *-*-gnu* | *-*-k*bsd*-gnu \ | *-*-netbsd* | *-*-freebsd* | *-*-openbsd* \ | *-*-solaris2* | *-*-sysv4* | *-*-hpux11* \ - | *-*-darwin* | *-*-aix* | *-*-dragonfly*) + | *-*-aix* | *-*-dragonfly*) # POSIX system. The OS is supported. ;; + *-*-darwin*) + # The OS is supported, but we need dynamic lookup to support undefined + # weak symbols at link-time. + XLDFLAGS="${XLDFLAGS} -Wl,-undefined,dynamic_lookup" + ;; + *) # Non-POSIX, or embedded system UNSUPPORTED=1 ;; diff --git a/libsanitizer/configure.tgt b/libsanitizer/configure.tgt index ef9150209c4..f73d410dedf 100644 --- a/libsanitizer/configure.tgt +++ b/libsanitizer/configure.tgt @@ -64,6 +64,7 @@ case "${target}" in ;; x86_64-*-darwin2* | x86_64-*-darwin1[2-9]* | i?86-*-darwin1[2-9]*) TSAN_SUPPORTED=no + EXTRA_CXXFLAGS+="-Wl,-undefined,dynamic_lookup" ;; x86_64-*-solaris2.11* | i?86-*-solaris2.11*) ;; diff --git a/libtool.m4 b/libtool.m4 index e194e899fcf..9b14b9470df 100644 --- a/libtool.m4 +++ b/libtool.m4 @@ -994,23 +994,25 @@ _LT_EOF rm -f conftest.err libconftest.a conftest conftest.c rm -rf conftest.dSYM ]) - case $host_os in - rhapsody* | darwin1.[[012]]) + # Allow for Darwin 4-7 (macOS 10.0-10.3) although these are not expect to + # build without first building modern cctools / linker. + case $host_cpu-$host_os in + *-rhapsody* | *-darwin1.[[012]]) _lt_dar_allow_undefined='${wl}-undefined ${wl}suppress' ;; - darwin1.*) + *-darwin1.*) _lt_dar_allow_undefined='${wl}-flat_namespace ${wl}-undefined ${wl}suppress' ;; - darwin*) # darwin 5.x on - # if running on 10.5 or later, the deployment target defaults - # to the OS version, if on x86, and 10.4, the deployment - # target defaults to 10.4. Don't you love it? - case ${MACOSX_DEPLOYMENT_TARGET-10.0},$host in - 10.0,*86*-darwin8*|10.0,*-darwin[[91]]*) - _lt_dar_allow_undefined='${wl}-undefined ${wl}dynamic_lookup' ;; + *-darwin*) + # darwin 5.x (macoS 10.5) onwards we only adjust when the deployement + # target is forced to an earlier version. + case ${MACOSX_DEPLOYMENT_TARGET-UNSET},$host in + UNSET,*-darwin[[89]]*|UNSET,*-darwin[[12]][[0123456789]]*) + ;; 10.[[012]][[,.]]*) - _lt_dar_allow_undefined='${wl}-flat_namespace ${wl}-undefined ${wl}suppress' ;; - 10.*) - _lt_dar_allow_undefined='${wl}-undefined ${wl}dynamic_lookup' ;; - esac + _lt_dar_allow_undefined='${wl}-flat_namespace ${wl}-undefined ${wl}suppress' + ;; + *) + ;; + esac ;; esac if test "$lt_cv_apple_cc_single_mod" = "yes"; then @@ -1033,7 +1035,7 @@ _LT_EOF # _LT_DARWIN_LINKER_FEATURES # -------------------------- -# Checks for linker and compiler features on darwin +# Checks for linker and compiler features on darwin / macos / ios 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