diff options
| -rw-r--r-- | INSTALL | 5 | ||||
| -rw-r--r-- | NEWS | 2 | ||||
| -rw-r--r-- | manual/install.texi | 5 | ||||
| -rw-r--r-- | sysdeps/powerpc/powerpc64/le/configure | 29 | ||||
| -rw-r--r-- | sysdeps/powerpc/powerpc64/le/configure.ac | 15 |
5 files changed, 55 insertions, 1 deletions
diff --git a/INSTALL b/INSTALL index 392537cc5c..1baa99f304 100644 --- a/INSTALL +++ b/INSTALL @@ -467,6 +467,11 @@ build the GNU C Library: better code. As of release time, GCC 9.1.1 is the newest compiler verified to work to build the GNU C Library. + For PowerPC 64-bits little-endian (powerpc64le), a GCC version with + support for -mno-gnu-attribute is required. As of release time, + this means GCC 7 or higher. The compiler option is required for + building the GNU C Library with support for IEEE long double. + For multi-arch support it is recommended to use a GCC which has been built with support for GNU indirect functions. This ensures that correct debugging information is generated for functions diff --git a/NEWS b/NEWS index 5a2d0a5b8b..a39d782274 100644 --- a/NEWS +++ b/NEWS @@ -101,7 +101,7 @@ Deprecated and removed features, and other changes affecting compatibility: Changes to build and runtime requirements: - [Add changes to build and runtime requirements here] +* On powerpc64le, GCC 7 or later is required to build the GNU C Library. Security related changes: diff --git a/manual/install.texi b/manual/install.texi index b2d569ac5a..85767ebde3 100644 --- a/manual/install.texi +++ b/manual/install.texi @@ -507,6 +507,11 @@ the newest version of the compiler that is known to work for building release time, GCC 9.1.1 is the newest compiler verified to work to build @theglibc{}. +For PowerPC 64-bits little-endian (powerpc64le), a GCC version with +support for -mno-gnu-attribute is required. As of release time, this +means GCC 7 or higher. The compiler option is required for building the +GNU C Library with support for IEEE long double. + For multi-arch support it is recommended to use a GCC which has been built with support for GNU indirect functions. This ensures that correct debugging information is generated for functions selected by IFUNC resolvers. This diff --git a/sysdeps/powerpc/powerpc64/le/configure b/sysdeps/powerpc/powerpc64/le/configure index bca80cec76..c8e01af4f2 100644 --- a/sysdeps/powerpc/powerpc64/le/configure +++ b/sysdeps/powerpc/powerpc64/le/configure @@ -32,4 +32,33 @@ if test "$libc_cv_target_power8_ok" != "yes"; then : fi CFLAGS="$OLD_CFLAGS" +# Local configure fragment for sysdeps/powerpc/powerpc64le. + +OLD_CFLAGS="$CFLAGS" +CFLAGS="$CFLAGS -mno-gnu-attribute" +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if the compiler supports -mno-gnu-attribute" >&5 +$as_echo_n "checking if the compiler supports -mno-gnu-attribute... " >&6; } +if ${libc_cv_no_gnu_attr_ok+:} false; then : + $as_echo_n "(cached) " >&6 +else + +cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + + +_ACEOF +if ac_fn_c_try_compile "$LINENO"; then : + libc_cv_no_gnu_attr_ok=yes +else + libc_cv_no_gnu_attr_ok=no +fi +rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_no_gnu_attr_ok" >&5 +$as_echo "$libc_cv_no_gnu_attr_ok" >&6; } +if test "$libc_cv_no_gnu_attr_ok" != "yes"; then : + critic_missing="$critic_missing A compiler with -mno-gnu-attribute is required on powerpc64le." +fi +CFLAGS="$OLD_CFLAGS" + test -n "$critic_missing" && as_fn_error $? "*** $critic_missing" "$LINENO" 5 diff --git a/sysdeps/powerpc/powerpc64/le/configure.ac b/sysdeps/powerpc/powerpc64/le/configure.ac index 7f2c9fbf1f..fdec69603b 100644 --- a/sysdeps/powerpc/powerpc64/le/configure.ac +++ b/sysdeps/powerpc/powerpc64/le/configure.ac @@ -17,4 +17,19 @@ AS_IF([test "$libc_cv_target_power8_ok" != "yes"], [critic_missing="$critic_missing POWER8 or newer is required on powerpc64le."]) CFLAGS="$OLD_CFLAGS" +# Local configure fragment for sysdeps/powerpc/powerpc64le. + +dnl Require support for -mno-gnu-attribute +OLD_CFLAGS="$CFLAGS" +CFLAGS="$CFLAGS -mno-gnu-attribute" +AC_CACHE_CHECK([if the compiler supports -mno-gnu-attribute], + libc_cv_no_gnu_attr_ok, [ +AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ +]])], + [libc_cv_no_gnu_attr_ok=yes], + [libc_cv_no_gnu_attr_ok=no])]) +AS_IF([test "$libc_cv_no_gnu_attr_ok" != "yes"], + [critic_missing="$critic_missing A compiler with -mno-gnu-attribute is required on powerpc64le."]) +CFLAGS="$OLD_CFLAGS" + test -n "$critic_missing" && AC_MSG_ERROR([*** $critic_missing]) |