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glibc/sysdeps/aarch64/configure.ac

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[AArch64] Define BE loader name.
2014-01-01 17:29:23 +00:00
GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
# Local configure fragment for sysdeps/aarch64.
configure: Check for static PIE support Add SUPPORT_STATIC_PIE that targets can define if they support static PIE. This requires PI_STATIC_AND_HIDDEN support and various linker features as described in commit 9d7a3741c9e59eba87fb3ca6b9f979befce07826 Add --enable-static-pie configure option to build static PIE [BZ #19574] Currently defined on x86_64, i386 and aarch64 where static PIE is known to work. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
2021-01-20 12:26:31 +00:00
# Static PIE is supported.
AC_DEFINE(SUPPORT_STATIC_PIE)
[AArch64] Define BE loader name.
2014-01-01 17:29:23 +00:00
# We check to see if the compiler and flags are
# selecting the big endian ABI and if they are then
# we set libc_cv_aarch64_be to yes which causes
# HAVE_AARCH64_BE to be defined in config.h and
# in include/libc-symbols.h and thus available to
# shlib-versions to select the appropriate name for
# the dynamic linker via %ifdef.
AC_CACHE_CHECK([for big endian],
[libc_cv_aarch64_be],
[AC_EGREP_CPP(yes,[#ifdef __AARCH64EB__
yes
#endif
], libc_cv_aarch64_be=yes, libc_cv_aarch64_be=no)])
if test $libc_cv_aarch64_be = yes; then
AC_DEFINE(HAVE_AARCH64_BE)
LIBC_CONFIG_VAR([default-abi], [lp64_be])
else
LIBC_CONFIG_VAR([default-abi], [lp64])
fi
aarch64: configure test for BTI support Check BTI support in the compiler and linker. The check also requires READELF that understands the BTI GNU property note. It is expected to succeed with gcc >=gcc-9 configured with --enable-standard-branch-protection and binutils >=binutils-2.33. Note: passing -mbranch-protection=bti in CFLAGS when building glibc may not be enough to get a glibc that supports BTI because crtbegin* and crtend* provided by the compiler needs to be BTI compatible too. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
2020-05-06 19:22:16 +00:00
Enable libmvec support for AArch64 This patch enables libmvec on AArch64. The proposed change is mainly implementing build infrastructure to add the new routines to ABI, tests and benchmarks. I have demonstrated how this all fits together by adding implementations for vector cos, in both single and double precision, targeting both Advanced SIMD and SVE. The implementations of the routines themselves are just loops over the scalar routine from libm for now, as we are more concerned with getting the plumbing right at this point. We plan to contribute vector routines from the Arm Optimized Routines repo that are compliant with requirements described in the libmvec wiki. Building libmvec requires minimum GCC 10 for SVE ACLE. To avoid raising the minimum GCC by such a big jump, we allow users to disable libmvec if their compiler is too old. Note that at this point users have to manually call the vector math functions. This seems to be acceptable to some downstream users. Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
2023-04-12 13:37:49 +00:00
if test x"$build_mathvec" = xnotset; then
build_mathvec=yes
fi
AArch64: Cleanup SVE config and defines Now we finally support modern GCC and binutils, it's time for a cleanup. Remove HAVE_AARCH64_SVE_ASM define and conditional compilation. Remove SVE configure checks for SVE, ACLE and variant-PCS support. Reviewed-by: Yury Khrustalev <yury.khrustalev@arm.com>
2025-05-14 11:38:19 +00:00
if test $build_mathvec = no; then
aarch64: More configure checks for libmvec Check assembler and linker support too, not just SVE ACLE in the compiler, since variant PCS requires at least binutils 2.32.1.
2023-05-05 08:01:58 +00:00
AC_MSG_WARN([mathvec is disabled, this results in incomplete ABI.])
aarch64: SVE ACLE configure test cleanups Use more idiomatic configure test for better autoconf cache and logs.
2023-05-04 09:14:43 +00:00
fi
Disable SFrame support by default And add extra checks to enable for binutils 2.45 and if the architecture explicitly enables it. When SFrame is disabled, all the related code is also not enabled for backtrace() and _dl_find_object(), so SFrame backtracking is not used even if the binary has the SFrame segment. This patch also adds some other related fixes: * Fixed an issue with AC_CHECK_PROG_VER, where the READELF_SFRAME usage prevented specifying a different readelf through READELF environment variable at configure time. * Add an extra arch-specific internal definition, libc_cv_support_sframe, to disable --enable-sframe on architectures that have binutils but not glibc support (s390x). * Renamed the tests without the .sframe segment and move the tst-backtrace1 from pthread to debug. * Use the built compiler strip to remove the .sframe segment, instead of the system one (which might not support SFrame). Checked on x86_64-linux-gnu and aarch64-linux-gnu. Reviewed-by: Sam James <sam@gentoo.org>
2025-07-22 15:55:50 +00:00
libc_cv_support_sframe=yes