glibc/sysdeps/hppa/configure.ac
Siddhesh Poyarekar 23645707f1 Replace --enable-static-pie with --disable-default-pie
Build glibc programs and tests as PIE by default and enable static-pie
automatically if the architecture and toolchain supports it.

Also add a new configuration option --disable-default-pie to prevent
building programs as PIE.

Only the following architectures now have PIE disabled by default
because they do not work at the moment.  hppa, ia64, alpha and csky
don't work because the linker is unable to handle a pcrel relocation
generated from PIE objects.  The microblaze compiler is currently
failing with an ICE.  GNU hurd tries to enable static-pie, which does
not work and hence fails.  All these targets have default PIE disabled
at the moment and I have left it to the target maintainers to enable PIE
on their targets.

build-many-glibcs runs clean for all targets.  I also tested x86_64 on
Fedora and Ubuntu, to verify that the default build as well as
--disable-default-pie work as expected with both system toolchains.

Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
2021-12-13 08:08:59 +05:30

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GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
dnl The standard hppa assembler uses `;' to start comments and `!'
dnl as a line separator.
AC_CACHE_CHECK(for assembler line separator,
libc_cv_asm_line_sep, [dnl
cat > conftest.s <<EOF
nop ; is_old_puffin
EOF
if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
libc_cv_asm_line_sep='!'
else
if test -z "$enable_hacker_mode"; then
echo "*** You need a newer assembler to compile glibc"
rm -f conftest*
exit 1
fi
libc_cv_asm_line_sep=';'
fi
rm -f conftest*])
AC_DEFINE_UNQUOTED(ASM_LINE_SEP, $libc_cv_asm_line_sep)
# PIE builds fail on binutils 2.37 and earlier, see:
# https://sourceware.org/bugzilla/show_bug.cgi?id=28672
AC_DEFINE(PIE_UNSUPPORTED)
# work around problem with autoconf and empty lines at the end of files