diff options
Diffstat (limited to '0217-Backport-SME-libgcc-aarch64-Configure-check-for-__ge.patch')
| -rw-r--r-- | 0217-Backport-SME-libgcc-aarch64-Configure-check-for-__ge.patch | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/0217-Backport-SME-libgcc-aarch64-Configure-check-for-__ge.patch b/0217-Backport-SME-libgcc-aarch64-Configure-check-for-__ge.patch new file mode 100644 index 0000000..07c1417 --- /dev/null +++ b/0217-Backport-SME-libgcc-aarch64-Configure-check-for-__ge.patch @@ -0,0 +1,117 @@ +From 66d4035958e1dee2d16f9290004921674eb492b3 Mon Sep 17 00:00:00 2001 +From: Szabolcs Nagy <szabolcs.nagy@arm.com> +Date: Mon, 4 Dec 2023 10:52:52 +0000 +Subject: [PATCH 118/157] [Backport][SME] libgcc: aarch64: Configure check for + __getauxval + +Reference: https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=dbbfb52b0e9c66ee9d05b8fd17c4f44655e48463 + +Add configure check for the __getauxval ABI symbol, which is always +available on aarch64 glibc, and may be available on other linux C +runtimes. For now only enabled on glibc, others have to override it + + target_configargs=libgcc_cv_have___getauxval=yes + +This is deliberately obscure as it should be auto detected, ideally +via a feature test macro in unistd.h (link time detection is not +possible since the libc may not be installed at libgcc build time), +but currently there is no such feature test mechanism. + +Without __getauxval, libgcc cannot do runtime CPU feature detection +and has to assume only the build time known features are available. + +libgcc/ChangeLog: + + * config.in: Undef HAVE___GETAUXVAL. + * configure: Regenerate. + * configure.ac: Check for __getauxval. +--- + libgcc/config.in | 3 +++ + libgcc/configure | 26 ++++++++++++++++++++++++++ + libgcc/configure.ac | 19 +++++++++++++++++++ + 3 files changed, 48 insertions(+) + +diff --git a/libgcc/config.in b/libgcc/config.in +index 5dd96cdf6..441d4d39b 100644 +--- a/libgcc/config.in ++++ b/libgcc/config.in +@@ -16,6 +16,9 @@ + /* Define to 1 if the assembler supports .variant_pcs. */ + #undef HAVE_AS_VARIANT_PCS + ++/* Define to 1 if __getauxval is available. */ ++#undef HAVE___GETAUXVAL ++ + /* Define to 1 if the target assembler supports thread-local storage. */ + #undef HAVE_CC_TLS + +diff --git a/libgcc/configure b/libgcc/configure +index afe02b303..a874ef57e 100755 +--- a/libgcc/configure ++++ b/libgcc/configure +@@ -5658,6 +5658,32 @@ $as_echo "#define HAVE_AS_VARIANT_PCS 1" >>confdefs.h + ;; + esac + ++# Check __getauxval ABI symbol for CPU feature detection. ++case ${target} in ++aarch64*-linux-*) ++ # No link check because the libc may not be present. ++ { $as_echo "$as_me:${as_lineno-$LINENO}: checking for __getauxval" >&5 ++$as_echo_n "checking for __getauxval... " >&6; } ++if ${libgcc_cv_have___getauxval+:} false; then : ++ $as_echo_n "(cached) " >&6 ++else ++ case ${target} in ++ *-linux-gnu*) ++ libgcc_cv_have___getauxval=yes ++ ;; ++ *) ++ libgcc_cv_have___getauxval=no ++ esac ++fi ++{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libgcc_cv_have___getauxval" >&5 ++$as_echo "$libgcc_cv_have___getauxval" >&6; } ++ if test x$libgcc_cv_have___getauxval = xyes; then ++ ++$as_echo "#define HAVE___GETAUXVAL 1" >>confdefs.h ++ ++ fi ++esac ++ + { $as_echo "$as_me:${as_lineno-$LINENO}: checking for init priority support" >&5 + $as_echo_n "checking for init priority support... " >&6; } + if ${libgcc_cv_init_priority+:} false; then : +diff --git a/libgcc/configure.ac b/libgcc/configure.ac +index abc398c91..64b45ae14 100644 +--- a/libgcc/configure.ac ++++ b/libgcc/configure.ac +@@ -665,6 +665,25 @@ aarch64*-*-*) + esac]) + LIBGCC_CHECK_AS_VARIANT_PCS + ++# Check __getauxval ABI symbol for CPU feature detection. ++case ${target} in ++aarch64*-linux-*) ++ # No link check because the libc may not be present. ++ AC_CACHE_CHECK([for __getauxval], ++ [libgcc_cv_have___getauxval], ++ [case ${target} in ++ *-linux-gnu*) ++ libgcc_cv_have___getauxval=yes ++ ;; ++ *) ++ libgcc_cv_have___getauxval=no ++ esac]) ++ if test x$libgcc_cv_have___getauxval = xyes; then ++ AC_DEFINE(HAVE___GETAUXVAL, 1, ++ [Define to 1 if __getauxval is available.]) ++ fi ++esac ++ + dnl Check if as supports RTM instructions. + AC_CACHE_CHECK(for init priority support, libgcc_cv_init_priority, [ + AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, +-- +2.33.0 + |