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GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
# Local configure fragment for sysdeps/riscv/elf.
# Check if static linker supports R_RISCV_ALIGN
AC_CACHE_CHECK([for R_RISCV_ALIGN linker relaxation support], [libc_cv_riscv_r_align],[dnl
cat > conftest.S <<EOF
.align 3
foo:
li a0,42
ret
EOF
libc_cv_riscv_r_align=no
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles $no_ssp -shared -fPIC -o contests.o conftest.S])
then
libc_cv_riscv_r_align=yes
fi
rm -rf conftest.*])
LIBC_CONFIG_VAR([riscv-r-align], [$libc_cv_riscv_r_align])
dnl Test if the toolchain is new enough for static PIE.
AC_CACHE_CHECK([if the toolchain is sufficient to build static PIE on RISC-V],
libc_cv_static_pie_on_riscv, [
cat > conftest1.S <<\EOF
.globl _start
.type _start, @function
_start:
nop
.data
/* This should produce an R_RISCV_RELATIVE in the static PIE. */
.dword _start
EOF
libc_cv_static_pie_on_riscv=no
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -static-pie -nostdlib -fPIE -o conftest1 conftest1.S]) \
&& AC_TRY_COMMAND([LC_ALL=C $READELF -Wr conftest1 | grep -q R_RISCV_RELATIVE]) \
&& ! AC_TRY_COMMAND([LC_ALL=C $READELF -Wl conftest1 | grep -q INTERP])
then
libc_cv_static_pie_on_riscv=yes
fi
rm -rf conftest* ])
if test "$libc_cv_static_pie_on_riscv" = yes; then
AC_DEFINE(SUPPORT_STATIC_PIE)
fi
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