sysdeps/s390/configure.ac

   1 GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
   2 # Local configure fragment for sysdeps/s390.
   3
   4 dnl It is always possible to access static and hidden symbols in an
   5 dnl position independent way.
   6 AC_DEFINE(PI_STATIC_AND_HIDDEN)
   7
   8 dnl Accept as 2.24 or newer.
   9 AC_CHECK_PROG_VER(AS, $AS, --version,
  10                   [GNU assembler.* \([0-9]*\.[0-9.]*\)],
  11                   [2.2[4-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*], critic_missing="$critic_missing The program AS is required in version >= 2.24 for target S390.")
  12
  13
  14 AC_CACHE_CHECK(for __builtin_tbegin, libc_cv_gcc_builtin_tbegin, [dnl
  15 cat > conftest.c <<\EOF
  16 #include <htmintrin.h>
  17 void testtransaction ()
  18 {
  19   if (__builtin_tbegin (0) == _HTM_TBEGIN_STARTED)
  20     {
  21       __builtin_tend ();
  22     }
  23 }
  24 EOF
  25 dnl
  26 dnl test, if the tbegin instruction is used by __builtin_tbegin
  27 if AC_TRY_COMMAND([${CC-cc} -mhtm -O2 -S conftest.c -o - | grep -w tbegin > /dev/null]) ;
  28 then
  29   libc_cv_gcc_builtin_tbegin=yes
  30 else
  31   libc_cv_gcc_builtin_tbegin=no
  32 fi
  33 rm -f conftest* ])
  34
  35 if test "$enable_lock_elision" = yes && test "$libc_cv_gcc_builtin_tbegin" = no ; then
  36    critic_missing="$critic_missing The used GCC has no support for __builtin_tbegin, which is needed for lock-elision on target S390."
  37 fi
  38
  39
  40 AC_CACHE_CHECK(for S390 vector instruction support, libc_cv_asm_s390_vx, [dnl
  41 cat > conftest.c <<\EOF
  42 void testvecinsn ()
  43 {
  44     __asm__ (".machine \"z13\" \n\t"
  45              ".machinemode \"zarch_nohighgprs\" \n\t"
  46              "vistrbs %%v16,%%v17 \n\t"
  47              "locghie %%r1,0" : :);
  48 }
  49 EOF
  50 dnl
  51 dnl test, if assembler supports S390 vector instructions
  52 if AC_TRY_COMMAND([${CC-cc} --shared conftest.c -o conftest.o &> /dev/null]) ;
  53 then
  54   libc_cv_asm_s390_vx=yes
  55 else
  56   libc_cv_asm_s390_vx=no
  57 fi
  58 rm -f conftest* ])
  59
  60 if test "$libc_cv_asm_s390_vx" = yes ;
  61 then
  62   AC_DEFINE(HAVE_S390_VX_ASM_SUPPORT)
  63 else
  64   AC_MSG_WARN([Use binutils with vector-support in order to use optimized implementations.])
  65 fi
  66
  67 AC_CACHE_CHECK(for S390 vector support in gcc, libc_cv_gcc_s390_vx, [dnl
  68 cat > conftest.c <<\EOF
  69 void testvecclobber ()
  70 {
  71   __asm__ ("" : : : "v16");
  72 }
  73 EOF
  74 dnl
  75 dnl test, if gcc supports S390 vector registers as clobber in inline assembly
  76 if AC_TRY_COMMAND([${CC-cc} --shared conftest.c -o conftest.o &> /dev/null]) ;
  77 then
  78   libc_cv_gcc_s390_vx=yes
  79 else
  80   libc_cv_gcc_s390_vx=no
  81 fi
  82 rm -f conftest* ])
  83
  84 if test "$libc_cv_gcc_s390_vx" = yes ;
  85 then
  86   AC_DEFINE(HAVE_S390_VX_GCC_SUPPORT)
  87 fi
  88
  89 AC_CACHE_CHECK(for S390 z196 zarch instruction support as default,
  90                libc_cv_asm_s390_min_z196_zarch, [dnl
  91 cat > conftest.c <<\EOF
  92 float testinsn (double e)
  93 {
  94     float d;
  95     __asm__ ("ledbra %0,5,%1,4" : "=f" (d) : "f" (e) );
  96     return d;
  97 }
  98 EOF
  99 dnl
 100 dnl test, if assembler supports S390 z196 zarch instructions as default
 101 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c
 102                         -o conftest.o &> /dev/null]) ;
 103 then
 104   libc_cv_asm_s390_min_z196_zarch=yes
 105 else
 106   libc_cv_asm_s390_min_z196_zarch=no
 107 fi
 108 rm -f conftest* ])
 109
 110 if test "$libc_cv_asm_s390_min_z196_zarch" = yes ;
 111 then
 112   AC_DEFINE(HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT)
 113 fi
 114
 115 test -n "$critic_missing" && AC_MSG_ERROR([
 116 *** $critic_missing])