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[81.26.241.118]) by smtp.gmail.com with ESMTPSA id o14-20020a056512230e00b004a26ba3458fsm2132013lfu.62.2022.12.05.05.43.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Dec 2022 05:43:57 -0800 (PST) From: =?utf-8?q?Joakim_Nohlg=C3=A5rd?= To: gcc-patches@gcc.gnu.org Cc: =?utf-8?q?Joakim_Nohlg=C3=A5rd?= Subject: [PATCH v2] gcc: Use ld -r when checking for HAVE_LD_RO_RW_SECTION_MIXING Date: Mon, 5 Dec 2022 14:43:49 +0100 Message-Id: <20221205134349.1730053-1-joakim@nohlgard.se> X-Mailer: git-send-email 2.38.1 MIME-Version: 1.0 X-Spam-Status: No, score=-14.1 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org Sender: "Gcc-patches" X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1751381838297554271?= X-GMAIL-MSGID: =?utf-8?q?1751381838297554271?= Fall back to ld -r if ld -shared fails during configure. The check for HAVE_LD_RO_RW_SECTION_MIXING can fail on targets where ld does not support shared objects, even though the answer to the test should be 'read-write'. One such target is riscv64-unknown-elf. Failing this test results in a libgcc crtbegin.o which has a writable .eh_frame section leading to the default linker scripts placing the .eh_frame section in a writable memory segment, or a linker warning when using ld scripts that place .eh_frame unconditionally in ROM. gcc/ChangeLog: * configure: Regenerate. * configure.ac: Use ld -r in the check for HAVE_LD_RO_RW_SECTION_MIXING Signed-off-by: Joakim Nohlgård --- gcc/configure.ac | 23 +++++++++++++---------- 1 file changed, 13 insertions(+), 10 deletions(-) diff --git a/gcc/configure.ac b/gcc/configure.ac index 7c55bff6cb0..500829ceb1d 100644 --- a/gcc/configure.ac +++ b/gcc/configure.ac @@ -3152,16 +3152,19 @@ elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then echo '.byte 0' >> conftest3.s if $gcc_cv_as -o conftest1.o conftest1.s > /dev/null 2>&1 \ && $gcc_cv_as -o conftest2.o conftest2.s > /dev/null 2>&1 \ - && $gcc_cv_as -o conftest3.o conftest3.s > /dev/null 2>&1 \ - && $gcc_cv_ld -shared -o conftest1.so conftest1.o \ - conftest2.o conftest3.o > /dev/null 2>&1; then - gcc_cv_ld_ro_rw_mix=`$gcc_cv_objdump -h conftest1.so \ - | sed -e '/myfoosect/!d' -e N` - if echo "$gcc_cv_ld_ro_rw_mix" | grep CONTENTS > /dev/null; then - if echo "$gcc_cv_ld_ro_rw_mix" | grep READONLY > /dev/null; then - gcc_cv_ld_ro_rw_mix=read-only - else - gcc_cv_ld_ro_rw_mix=read-write + && $gcc_cv_as -o conftest3.o conftest3.s > /dev/null 2>&1; then + if $gcc_cv_ld -shared -o conftest1.so conftest1.o \ + conftest2.o conftest3.o > /dev/null 2>&1 \ + || $gcc_cv_ld -r -o conftest1.so conftest1.o \ + conftest2.o conftest3.o > /dev/null 2>&1; then + gcc_cv_ld_ro_rw_mix=`$gcc_cv_objdump -h conftest1.so \ + | sed -e '/myfoosect/!d' -e N` + if echo "$gcc_cv_ld_ro_rw_mix" | grep CONTENTS > /dev/null; then + if echo "$gcc_cv_ld_ro_rw_mix" | grep READONLY > /dev/null; then + gcc_cv_ld_ro_rw_mix=read-only + else + gcc_cv_ld_ro_rw_mix=read-write + fi fi fi fi