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sysdeps: powerpc: restore -mlong-double-128 check 

We mistakenly dropped the check in 27b96e069aad17cefea9437542180bff448ac3a0;
there's some other checks which we *can* drop, but let's worry about that
later.

Fixes the build on ppc64le where GCC is configured with --with-long-double-format=ieee.

Reviewed-by: Andreas Schwab <schwab@suse.de>
This commit is contained in:
Sam James 2025-04-01 21:56:52 +01:00
parent 95b780c1d0
commit e8514ac7aa
No known key found for this signature in database
GPG Key ID: 738409F520DF9190
2 changed files with 117 additions and 0 deletions
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83
sysdeps/unix/sysv/linux/powerpc/configure vendored
View File

@ -1,6 +1,89 @@
# This file is generated from configure.ac by Autoconf. DO NOT EDIT!
# Local configure fragment for sysdeps/unix/sysv/linux/powerpc/.
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $CC $CFLAGS -mlong-double-128 uses IBM extended format" >&5
printf %s "checking whether $CC $CFLAGS -mlong-double-128 uses IBM extended format... " >&6; }
if test ${libc_cv_mlong_double_128ibm+y}
then :
printf %s "(cached) " >&6
else case e in #(
e) save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -mlong-double-128"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#include <float.h>
int
main (void)
{
#if LDBL_MANT_DIG != 106
# error "compiler doesn't implement IBM extended format of long double"
#endif
long double foobar (long double x) { return x; }
;
return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"
then :
libc_cv_mlong_double_128ibm=yes
else case e in #(
e) libc_cv_mlong_double_128ibm=no ;;
esac
fi
rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
CFLAGS="$save_CFLAGS" ;;
esac
fi
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_cv_mlong_double_128ibm" >&5
printf "%s\n" "$libc_cv_mlong_double_128ibm" >&6; }
if test "$libc_cv_mlong_double_128ibm" = no; then
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $CC $CFLAGS supports -mabi=ibmlongdouble" >&5
printf %s "checking whether $CC $CFLAGS supports -mabi=ibmlongdouble... " >&6; }
if test ${libc_cv_mabi_ibmlongdouble+y}
then :
printf %s "(cached) " >&6
else case e in #(
e) save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -mlong-double-128 -mabi=ibmlongdouble"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#include <float.h>
int
main (void)
{
#if LDBL_MANT_DIG != 106
# error "compiler doesn't implement IBM extended format of long double"
#endif
long double foobar (long double x) { return x; }
;
return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"
then :
libc_cv_mabi_ibmlongdouble=yes
else case e in #(
e) libc_cv_mabi_ibmlongdouble=no ;;
esac
fi
rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
CFLAGS="$save_CFLAGS" ;;
esac
fi
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_cv_mabi_ibmlongdouble" >&5
printf "%s\n" "$libc_cv_mabi_ibmlongdouble" >&6; }
if test "$libc_cv_mabi_ibmlongdouble" = yes; then
CFLAGS="$CFLAGS -mabi=ibmlongdouble"
else
as_fn_error $? "this configuration requires -mlong-double-128 IBM extended format support" "$LINENO" 5
fi
fi
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for linker that supports --no-tls-get-addr-optimize" >&5
printf %s "checking for linker that supports --no-tls-get-addr-optimize... " >&6; }
libc_linker_feature=no

34
sysdeps/unix/sysv/linux/powerpc/configure.ac
View File

@ -2,6 +2,40 @@ sinclude(./aclocal.m4)dnl Autoconf lossage
GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
# Local configure fragment for sysdeps/unix/sysv/linux/powerpc/.
AC_CACHE_CHECK(whether $CC $CFLAGS -mlong-double-128 uses IBM extended format,
libc_cv_mlong_double_128ibm, [dnl
save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -mlong-double-128"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <float.h>]], [[
#if LDBL_MANT_DIG != 106
# error "compiler doesn't implement IBM extended format of long double"
#endif
long double foobar (long double x) { return x; }]])],
libc_cv_mlong_double_128ibm=yes,
libc_cv_mlong_double_128ibm=no)
CFLAGS="$save_CFLAGS"])
if test "$libc_cv_mlong_double_128ibm" = no; then
AC_CACHE_CHECK(whether $CC $CFLAGS supports -mabi=ibmlongdouble,
libc_cv_mabi_ibmlongdouble, [dnl
save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -mlong-double-128 -mabi=ibmlongdouble"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <float.h>]], [[
#if LDBL_MANT_DIG != 106
# error "compiler doesn't implement IBM extended format of long double"
#endif
long double foobar (long double x) { return x; }]])],
libc_cv_mabi_ibmlongdouble=yes,
libc_cv_mabi_ibmlongdouble=no)
CFLAGS="$save_CFLAGS"])
if test "$libc_cv_mabi_ibmlongdouble" = yes; then
CFLAGS="$CFLAGS -mabi=ibmlongdouble"
else
AC_MSG_ERROR([this configuration requires -mlong-double-128 IBM extended format support])
fi
fi
LIBC_LINKER_FEATURE([--no-tls-get-addr-optimize], [-Wl,--no-tls-get-addr-optimize],
[libc_cv_tls_get_addr_optimize=yes], [libc_cv_tls_get_addr_optimize=no])
LIBC_CONFIG_VAR([have-tls-get-addr-optimize], [$libc_cv_tls_get_addr_optimize])