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146fea07640387c78e334933de24b6353e1f0eba.patch
From 146fea07640387c78e334933de24b6353e1f0eba Mon Sep 17 00:00:00 2001 From: "Paul E. Murphy" <murphyp@linux.vnet.ibm.com> Date: Fri, 8 May 2020 08:27:56 -0500 Subject: [PATCH] powerpc: Automatic CPU detection in preconfigure Added a check to detect the CPU value in preconfigure, so that glibc is built with the correct --with-cpu value. And move existing checks into preconfigure.ac. Co-Authored-By: Carlos Eduardo Seo <cseo@linux.vnet.ibm.com> Co-Authored-By: Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com> --- sysdeps/powerpc/preconfigure | 62 +++++++++++++++++++++++++++++---- sysdeps/powerpc/preconfigure.ac | 58 ++++++++++++++++++++++++++++++ 2 files changed, 113 insertions(+), 7 deletions(-) create mode 100644 sysdeps/powerpc/preconfigure.ac diff --git a/sysdeps/powerpc/preconfigure b/sysdeps/powerpc/preconfigure index a0ea745bb4..deac5a41e2 100644 --- a/sysdeps/powerpc/preconfigure +++ b/sysdeps/powerpc/preconfigure @@ -1,4 +1,5 @@ -# preconfigure fragment for powerpc. +# This file is generated from configure.ac by Autoconf. DO NOT EDIT! + # Local preconfigure fragment for sysdeps/powerpc case "$machine" in powerpc64le) @@ -13,12 +14,59 @@ powerpc*) case "$host_os" in *gnuspe*) # SPE support was dropped in glibc 2.30. - # We can't use AC_MSG_ERROR here. - # The parent script is in the middle of printing the - # "checking for sysdeps preconfigure fragments" line. - echo >&2 - echo "Host system type $host is no longer supported." >&2 - exit 1 + as_fn_error $? "Host system type $host is no longer supported." "$LINENO" 5 + ;; + esac + ;; +esac + +# Lets ask the compiler which Power processor we've got, in case the user did +# not choose a --with-cpu value. Scan a trivial generated assembly program +# and scrape the first +# .machine <machine> +# or +# .ascii "-mcpu=<machine>" +# directive which shows up, and try using it. +case "${machine}:${submachine}" in +*powerpc*:) + archcpu=`echo "int foo () { return 0; }" \ + | $CC $CFLAGS $CPPFLAGS -S -frecord-gcc-switches -xc -o - - \ + | grep -E "mcpu=|.machine" -m 1 \ + | sed -e "s/.*machine //" -e "s/.*mcpu=\(.*\)\"/\1/"` + # Note if you add patterns here you must ensure that an appropriate + # directory exists in sysdeps/powerpc. Likewise, if we find a + # cpu, don't let the generic configure append extra compiler options. + case "$archcpu" in + 405fp|440fp|464fp|476fp) + submachine=${archcpu%fp} + if ${libc_cv_cc_submachine+:} false; then : + $as_echo_n "(cached) " >&6 +else + libc_cv_cc_submachine="" +fi + + ;; + 405|440|464|476) + submachine=${archcpu} + if ${libc_cv_cc_submachine+:} false; then : + $as_echo_n "(cached) " >&6 +else + libc_cv_cc_submachine="" +fi + + ;; + + a2|970|power[4-9]|power5x|power6+) + submachine=${archcpu} + if ${libc_cv_cc_submachine+:} false; then : + $as_echo_n "(cached) " >&6 +else + libc_cv_cc_submachine="" +fi + + ;; + *) + # We couldn't figure it out, assume none ;; esac ;; diff --git a/sysdeps/powerpc/preconfigure.ac b/sysdeps/powerpc/preconfigure.ac new file mode 100644 index 0000000000..e6a5ae93a5 --- /dev/null +++ b/sysdeps/powerpc/preconfigure.ac @@ -0,0 +1,58 @@ +GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory. +# Local preconfigure fragment for sysdeps/powerpc + +case "$machine" in +powerpc64le) + base_machine=powerpc machine=powerpc/powerpc64/le + ;; +powerpc64*) + base_machine=powerpc machine=powerpc/powerpc64/be + ;; +powerpc*) + base_machine=powerpc machine=powerpc/powerpc32 + with_fp_cond="!defined __NO_FPRS__" + case "$host_os" in + *gnuspe*) + # SPE support was dropped in glibc 2.30. + AC_MSG_ERROR([Host system type $host is no longer supported.]) + ;; + esac + ;; +esac + +# Lets ask the compiler which Power processor we've got, in case the user did +# not choose a --with-cpu value. Scan a trivial generated assembly program +# and scrape the first +# .machine <machine> +# or +# .ascii "-mcpu=<machine>" +# directive which shows up, and try using it. +case "${machine}:${submachine}" in +*powerpc*:) + archcpu=`echo "int foo () { return 0; }" \ + | $CC $CFLAGS $CPPFLAGS -S -frecord-gcc-switches -xc -o - - \ + | grep -E "mcpu=|[.]machine" -m 1 \ + | sed -e "s/.*machine //" -e "s/.*mcpu=\(.*\)\"/\1/"` + # Note if you add patterns here you must ensure that an appropriate + # directory exists in sysdeps/powerpc. Likewise, if we find a + # cpu, don't let the generic configure append extra compiler options. + case "$archcpu" in + 405fp|440fp|464fp|476fp) + submachine=${archcpu%fp} + AC_CACHE_VAL(libc_cv_cc_submachine,libc_cv_cc_submachine="") + ;; + 405|440|464|476) + submachine=${archcpu} + AC_CACHE_VAL(libc_cv_cc_submachine,libc_cv_cc_submachine="") + ;; + + a2|970|power[[4-9]]|power5x|power6+) + submachine=${archcpu} + AC_CACHE_VAL(libc_cv_cc_submachine,libc_cv_cc_submachine="") + ;; + *) + # We couldn't figure it out, assume none + ;; + esac + ;; +esac -- 2.27.0