glibc/sysdeps/microblaze/configure.ac

GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
# Local configure fragment for sysdeps/microblaze.

AC_DEFINE(HIDDEN_VAR_NEEDS_DYNAMIC_RELOC)

# gcc 11.2.1 and earlier crash with an internal compiler error, see:
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103613
AC_DEFINE(PIE_UNSUPPORTED)
# work around problem with autoconf and empty lines at the end of files
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> 2021-12-08 05:51:26 +00:00			`GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.`
			`# Local configure fragment for sysdeps/microblaze.`

elf: Replace PI_STATIC_AND_HIDDEN with opposite HIDDEN_VAR_NEEDS_DYNAMIC_RELOC PI_STATIC_AND_HIDDEN indicates whether accesses to internal linkage variables and hidden visibility variables in a shared object (ld.so) need dynamic relocations (usually R_*_RELATIVE). PI (position independent) in the macro name is a misnomer: a code sequence using GOT is typically position-independent as well, but using dynamic relocations does not meet the requirement. Not defining PI_STATIC_AND_HIDDEN is legacy and we expect that all new ports will define PI_STATIC_AND_HIDDEN. Current ports defining PI_STATIC_AND_HIDDEN are more than the opposite. Change the configure default. No functional change. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> 2022-04-26 16:26:22 +00:00			`AC_DEFINE(HIDDEN_VAR_NEEDS_DYNAMIC_RELOC)`

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> 2021-12-08 05:51:26 +00:00			`# gcc 11.2.1 and earlier crash with an internal compiler error, see:`
			`# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103613`
			`AC_DEFINE(PIE_UNSUPPORTED)`
			`# work around problem with autoconf and empty lines at the end of files`