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| author | Gabriel F. T. Gomes <gftg@linux.vnet.ibm.com> | 2016-10-11 13:50:19 -0300 |
|---|---|---|
| committer | Gabriel F. T. Gomes <gftg@linux.vnet.ibm.com> | 2017-06-26 14:58:47 -0300 |
| commit | 4efe3ce400d763b6c8186dd389371f6359b05c54 (patch) | |
| tree | df3a5d8b3f6fe68bcee0181b50282a8e3250ccc0 /sysdeps | |
| parent | d54bb9b1d3fd25779fba2c403003c5097ba9af73 (diff) | |
| download | glibc-4efe3ce400d763b6c8186dd389371f6359b05c54.tar glibc-4efe3ce400d763b6c8186dd389371f6359b05c54.tar.gz glibc-4efe3ce400d763b6c8186dd389371f6359b05c54.tar.bz2 glibc-4efe3ce400d763b6c8186dd389371f6359b05c54.zip | |
powerpc64le: Check for compiler features for float128
On powerpc64le, support for float128 will be enabled, which requires some
compiler features to be present. This patch adds a configure test to check
for such features, which are provided for powerpc64le since GCC 6.2.
Tested for powerpc64 and powerpc64le.
* INSTALL: Regenerate.
* manual/install.texi (Recommended Tools for Compilation): Mention
the powerpc64le-specific requirement in the manual.
* sysdeps/powerpc/powerpc64le/configure.ac: New file with checks
for the compiler features required for building float128.
* sysdeps/powerpc/powerpc64le/configure: New, auto-generated file.
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/powerpc/powerpc64le/configure | 45 | ||||
| -rw-r--r-- | sysdeps/powerpc/powerpc64le/configure.ac | 32 |
2 files changed, 77 insertions, 0 deletions
diff --git a/sysdeps/powerpc/powerpc64le/configure b/sysdeps/powerpc/powerpc64le/configure new file mode 100644 index 0000000000..78208d2eda --- /dev/null +++ b/sysdeps/powerpc/powerpc64le/configure @@ -0,0 +1,45 @@ +# This file is generated from configure.ac by Autoconf. DO NOT EDIT! + # Local configure fragment for sysdeps/powerpc/powerpc64le. + + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if $CC supports binary128 floating point type" >&5 +$as_echo_n "checking if $CC supports binary128 floating point type... " >&6; } +if ${libc_cv_compiler_powerpc64le_binary128_ok+:} false; then : + $as_echo_n "(cached) " >&6 +else + save_CFLAGS="$CFLAGS" +CFLAGS="$CFLAGS -Werror -mfloat128" +cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + +__float128 a, b, c, d, e; +int i; + +__float128 +foobar (__float128 x) +{ + a = __builtin_nansq ("0"); + b = __builtin_huge_valq (); + c = __builtin_infq (); + d = __builtin_fabsq (x); + e = __builtin_nanq ("0"); + i = __builtin_signbit (x); + return __builtin_copysignq (x, x); +} + +_ACEOF +if ac_fn_c_try_compile "$LINENO"; then : + libc_cv_compiler_powerpc64le_binary128_ok=yes +else + libc_cv_compiler_powerpc64le_binary128_ok=no +fi +rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext +CFLAGS="$save_CFLAGS" +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_compiler_powerpc64le_binary128_ok" >&5 +$as_echo "$libc_cv_compiler_powerpc64le_binary128_ok" >&6; } +if test "$libc_cv_compiler_powerpc64le_binary128_ok" != "yes"; then : + critic_missing="$critic_missing binary128 floating point type (GCC >= 6.2) is required on powerpc64le." +fi + +test -n "$critic_missing" && as_fn_error $? "*** $critic_missing" "$LINENO" 5 diff --git a/sysdeps/powerpc/powerpc64le/configure.ac b/sysdeps/powerpc/powerpc64le/configure.ac new file mode 100644 index 0000000000..e88e224ae1 --- /dev/null +++ b/sysdeps/powerpc/powerpc64le/configure.ac @@ -0,0 +1,32 @@ +GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory. +# Local configure fragment for sysdeps/powerpc/powerpc64le. + +dnl Require binary128 floating point support on powerpc64le (available in +dnl GCC 6.2). +AC_CACHE_CHECK([if $CC supports binary128 floating point type], + libc_cv_compiler_powerpc64le_binary128_ok, [dnl +save_CFLAGS="$CFLAGS" +CFLAGS="$CFLAGS -Werror -mfloat128" +AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ +__float128 a, b, c, d, e; +int i; + +__float128 +foobar (__float128 x) +{ + a = __builtin_nansq ("0"); + b = __builtin_huge_valq (); + c = __builtin_infq (); + d = __builtin_fabsq (x); + e = __builtin_nanq ("0"); + i = __builtin_signbit (x); + return __builtin_copysignq (x, x); +} +]])], + [libc_cv_compiler_powerpc64le_binary128_ok=yes], + [libc_cv_compiler_powerpc64le_binary128_ok=no]) +CFLAGS="$save_CFLAGS"]) +AS_IF([test "$libc_cv_compiler_powerpc64le_binary128_ok" != "yes"], + [critic_missing="$critic_missing binary128 floating point type (GCC >= 6.2) is required on powerpc64le."]) + +test -n "$critic_missing" && AC_MSG_ERROR([*** $critic_missing]) |