1 GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
2 # Local configure fragment for sysdeps/riscv/elf.
4 # Check if static linker supports R_RISCV_ALIGN
5 AC_CACHE_CHECK([for R_RISCV_ALIGN linker relaxation support], [libc_cv_riscv_r_align],[dnl
12 libc_cv_riscv_r_align=no
13 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles $no_ssp -shared -fPIC -o contests.o conftest.S])
15 libc_cv_riscv_r_align=yes
18 LIBC_CONFIG_VAR([riscv-r-align], [$libc_cv_riscv_r_align])
20 dnl Test if the toolchain is new enough for static PIE.
21 AC_CACHE_CHECK([if the toolchain is sufficient to build static PIE on RISC-V],
22 libc_cv_static_pie_on_riscv, [
23 cat > conftest1.S <<\EOF
25 .type _start, @function
30 /* This should produce an R_RISCV_RELATIVE in the static PIE. */
34 libc_cv_static_pie_on_riscv=no
35 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -static-pie -nostdlib -fPIE -o conftest1 conftest1.S]) \
36 && AC_TRY_COMMAND([LC_ALL=C $READELF -Wr conftest1 | grep -q R_RISCV_RELATIVE]) \
37 && ! AC_TRY_COMMAND([LC_ALL=C $READELF -Wl conftest1 | grep -q INTERP])
39 libc_cv_static_pie_on_riscv=yes
43 if test "$libc_cv_static_pie_on_riscv" = yes; then
44 AC_DEFINE(SUPPORT_STATIC_PIE)