PowerPC: define _CALL_ELF if compiler does not define it
Commit Message
This patch make the configure adds -D_CALL_ELF=1 when compiler does
not define _CALL_ELF (versions before powerpc64le support).
This clean up the compiler warnings on old compiler where _CALL_ELF is
not defined on powerpc64(be) builds.
--
* sysdeps/unix/sysv/linux/powerpc/powerpc64/configure.ac
(libc_cv_ppc64_def_call_elf): Define it to yes if compiler does not set
_CALL_ELF.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/configure: Regenerate.
---
Comments
It seems questionable to modify CFLAGS for this. It probably belongs in
CPPFLAGS, to begin with. But I'm not sure I like it modifying the user's
CPPFLAGS either. It might be best to add a new config.make variable for
configure-deduced (as opposed to user-specified) CPPFLAGS and accumulate
into that. It would be an analogue to config-extra-cflags
(libc_extra_cflags in configure). While you're at it, generalize
libc_extra_cflags so it accumulates and could be used by sysdeps configure
fragments, rather than just being single-purpose as it is today.
@@ -163,4 +163,31 @@ default-abi = 64-v2"
else
config_vars="$config_vars
default-abi = 64-v1"
+ # Compiler which do not support ELFv2 ABI does not define _CALL_ELF
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the compiler defines _CALL_ELF" >&5
+$as_echo_n "checking whether the compiler defines _CALL_ELF... " >&6; }
+if ${libc_cv_ppc64_def_call_elf+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#ifdef _CALL_ELF
+ yes
+ #endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+ $EGREP "yes" >/dev/null 2>&1; then :
+ libc_cv_ppc64_def_call_elf=yes
+else
+ libc_cv_ppc64_def_call_elf=no
+fi
+rm -f conftest*
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_ppc64_def_call_elf" >&5
+$as_echo "$libc_cv_ppc64_def_call_elf" >&6; }
+ if test $libc_cv_ppc64_def_call_elf = no; then
+ CFLAGS="$CFLAGS -D_CALL_ELF=1"
+ fi
fi
@@ -12,4 +12,14 @@ if test $libc_cv_ppc64_elfv2_abi = yes; then
LIBC_CONFIG_VAR([default-abi], [64-v2])
else
LIBC_CONFIG_VAR([default-abi], [64-v1])
+ # Compiler which do not support ELFv2 ABI does not define _CALL_ELF
+ AC_CACHE_CHECK([whether the compiler defines _CALL_ELF],
+ [libc_cv_ppc64_def_call_elf],
+ [AC_EGREP_CPP(yes,[#ifdef _CALL_ELF
+ yes
+ #endif
+ ], libc_cv_ppc64_def_call_elf=yes, libc_cv_ppc64_def_call_elf=no)])
+ if test $libc_cv_ppc64_def_call_elf = no; then
+ CFLAGS="$CFLAGS -D_CALL_ELF=1"
+ fi
fi