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configure: Add --enable-sframe option

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Enable SFrame stack track information. The --enable-sframe option
allows the glibc build to compile with SFrame stack track
information. Thus, enabling glibc's backtrace to work within glibc.

Signed-off-by: Claudiu Zissulescu <claudiu.zissulescu-ianculescu@oracle.com>
Reviewed-by: DJ Delorie <dj@redhat.com>
Reviewed-by: Sam James <sam@gentoo.org>
This commit is contained in:
Claudiu Zissulescu
2025-07-14 12:43:30 +03:00
committed by Sam James
parent 3360913c37
commit 3d780a44eb
7 changed files with 195 additions and 1 deletions
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44
configure.ac
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@@ -440,6 +440,12 @@ case "$enable_fortify_source" in
*) AC_MSG_ERROR([Not a valid argument for --enable-fortify-source: "$enable_fortify_source"]);;
esac
AC_ARG_ENABLE([sframe],
[AS_HELP_STRING([--disable-sframe],
[Disable building with SFrame stack trace information @<:@default=yes if GNU as is 2.41 or older@:>@])],
[use_sframe=$enableval],
[use_sframe=notset])
# We keep the original values in `$config_*' and never modify them, so we
# can write them unchanged into config.make. Everything else uses
# $machine, $vendor, and $os, and changes them whenever convenient.
@@ -2115,6 +2121,44 @@ AC_SUBST(libc_cv_test_cc_mprefer_vector_width)
AC_SUBST(test_enable_cet)
AC_SUBST(libc_cv_test_x86_have_amx_tile)
# Glibc stacktracer supports SFrame v2 or newer
libc_cv_readelf_version_ok=yes
# SFrame is supported from 2.41 or higher
AC_CHECK_PROG_VER(READELF_SFRAME, $READELF, --version,
[GNU readelf.* \([0-9][0-9]*\.[0-9.]*\)],
[2.4[1-9]*|2.[5-9][0-9]*|[3-9].*|[1-9][0-9][0-9]*],
libc_cv_readelf_version_ok=no)
# Check the current toolchain for SFrame support
if test $libc_cv_readelf_version_ok = yes; then
AC_CACHE_CHECK([for SFrame support], libc_cv_default_sframe,
[dnl
cat > conftest.c <<EOF
int test_function(void)
{
return 42;
}
EOF
libc_cv_default_sframe=no
if ${CC} -c conftest.c -o conftest.o -Wa,--gsframe >/dev/null 2>&1 && \
# Check if .sframe section is present and if version > 1
$READELF --sframe conftest.o | grep "SFRAME_VER" | grep -qv "VERSION_1"; then
libc_cv_default_sframe=yes
fi
rm -f conftest.c conftest.o
])
fi
# Prevent enabling sframe on non-supporting toolchains
enable_gsframe=no
if test $use_sframe$libc_cv_default_sframe = yesyes || \
test $use_sframe$libc_cv_default_sframe = notsetyes; then
enable_gsframe=yes
elif test $use_sframe = yes; then
AC_MSG_FAILURE([toolchain doesn't support SFrame v2 or higher])
fi
AC_SUBST(enable_gsframe)
# Set the `multidir' variable by grabbing the variable from the compiler.
# We do it once and save the result in a generated makefile.
libc_cv_multidir=`${CC-cc} $CFLAGS $CPPFLAGS -print-multi-directory`