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RISC-V: Enable ifunc if it was supported in the binutils for linux toolchain. 

gcc/
	* configure: Regenerated.
	* configure.ac: If ifunc was supported in the binutils for
	linux toolchain, then set enable_gnu_indirect_function to yes.
This commit is contained in:
Nelson Chu 2020-11-10 19:33:38 -08:00 committed by Jim Wilson
parent 1d00f8c863
commit 97976c0757
2 changed files with 72 additions and 0 deletions
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37
gcc/configure vendored
View File

@ -23407,6 +23407,43 @@ else
fi
case "${target}" in
riscv*-*-linux*)
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking linker ifunc IRELATIVE support" >&5
$as_echo_n "checking linker ifunc IRELATIVE support... " >&6; }
cat > conftest.s <<EOF
.text
.type foo_resolver, @function
foo_resolver:
ret
.size foo_resolver, .-foo_resolver
.globl foo
.type foo, %gnu_indirect_function
.set foo, foo_resolver
.globl bar
.type bar, @function
bar:
call foo
ret
.size bar, .-bar
EOF
if test x$gcc_cv_as != x \
&& test x$gcc_cv_ld != x \
&& test x$gcc_cv_readelf != x \
&& $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1 \
&& $gcc_cv_ld -o conftest conftest.o > /dev/null 2>&1 \
&& $gcc_cv_readelf --relocs --wide conftest \
| grep R_RISCV_IRELATIVE > /dev/null 2>&1; then
enable_gnu_indirect_function=yes
fi
rm -f conftest conftest.o conftest.s
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_gnu_indirect_function" >&5
$as_echo "$enable_gnu_indirect_function" >&6; }
;;
esac
gif=`if test x$enable_gnu_indirect_function = xyes; then echo 1; else echo 0; fi`
cat >>confdefs.h <<_ACEOF

35
gcc/configure.ac
View File

@ -2807,6 +2807,41 @@ Valid choices are 'yes' and 'no'.]) ;;
esac],
[enable_gnu_indirect_function="$default_gnu_indirect_function"])
case "${target}" in
riscv*-*-linux*)
AC_MSG_CHECKING(linker ifunc IRELATIVE support)
cat > conftest.s <<EOF
.text
.type foo_resolver, @function
foo_resolver:
ret
.size foo_resolver, .-foo_resolver
.globl foo
.type foo, %gnu_indirect_function
.set foo, foo_resolver
.globl bar
.type bar, @function
bar:
call foo
ret
.size bar, .-bar
EOF
if test x$gcc_cv_as != x \
&& test x$gcc_cv_ld != x \
&& test x$gcc_cv_readelf != x \
&& $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1 \
&& $gcc_cv_ld -o conftest conftest.o > /dev/null 2>&1 \
&& $gcc_cv_readelf --relocs --wide conftest \
| grep R_RISCV_IRELATIVE > /dev/null 2>&1; then
enable_gnu_indirect_function=yes
fi
rm -f conftest conftest.o conftest.s
AC_MSG_RESULT($enable_gnu_indirect_function)
;;
esac
gif=`if test x$enable_gnu_indirect_function = xyes; then echo 1; else echo 0; fi`
AC_DEFINE_UNQUOTED(HAVE_GNU_INDIRECT_FUNCTION, $gif,
[Define if your system supports gnu indirect functions.])